diff --git a/fairmq/FairMQTransportFactory.h b/fairmq/FairMQTransportFactory.h
index de7fc802..ff560ca2 100644
--- a/fairmq/FairMQTransportFactory.h
+++ b/fairmq/FairMQTransportFactory.h
@@ -84,7 +84,7 @@ class FairMQTransportFactory
     /// @param path optional parameter to pass to the underlying transport
     /// @param flags optional parameter to pass to the underlying transport
     /// @return pointer to UnmanagedRegion
-    virtual FairMQUnmanagedRegionPtr CreateUnmanagedRegion(const size_t size, FairMQRegionCallback callback = nullptr, const std::string& path = "", int flags = 0) const = 0;
+    virtual FairMQUnmanagedRegionPtr CreateUnmanagedRegion(const size_t size, FairMQRegionCallback callback = nullptr, const std::string& path = "", int flags = 0) = 0;
     /// @brief Create new UnmanagedRegion
     /// @param size size of the region
     /// @param userFlags flags to be stored with the region, have no effect on the transport, but can be retrieved from the region by the user
@@ -92,7 +92,7 @@ class FairMQTransportFactory
     /// @param path optional parameter to pass to the underlying transport
     /// @param flags optional parameter to pass to the underlying transport
     /// @return pointer to UnmanagedRegion
-    virtual FairMQUnmanagedRegionPtr CreateUnmanagedRegion(const size_t size, const int64_t userFlags, FairMQRegionCallback callback = nullptr, const std::string& path = "", int flags = 0) const = 0;
+    virtual FairMQUnmanagedRegionPtr CreateUnmanagedRegion(const size_t size, const int64_t userFlags, FairMQRegionCallback callback = nullptr, const std::string& path = "", int flags = 0) = 0;
 
     /// @brief Subscribe to region events (creation, destruction, ...)
     /// @param callback the callback that is called when a region event occurs
diff --git a/fairmq/FairMQUnmanagedRegion.h b/fairmq/FairMQUnmanagedRegion.h
index 11d02ac1..b91c7836 100644
--- a/fairmq/FairMQUnmanagedRegion.h
+++ b/fairmq/FairMQUnmanagedRegion.h
@@ -14,13 +14,32 @@
 #include <functional> // std::function
 #include <ostream> // std::ostream
 
+class FairMQTransportFactory;
+
 enum class FairMQRegionEvent : int
 {
     created,
     destroyed
 };
 
-struct FairMQRegionInfo {
+struct FairMQRegionInfo
+{
+    FairMQRegionInfo()
+        : id(0)
+        , ptr(nullptr)
+        , size(0)
+        , flags(0)
+        , event(FairMQRegionEvent::created)
+    {}
+
+    FairMQRegionInfo(uint64_t _id, void* _ptr, size_t _size, int64_t _flags, FairMQRegionEvent _event)
+        : id(_id)
+        , ptr(_ptr)
+        , size(_size)
+        , flags(_flags)
+        , event (_event)
+    {}
+
     uint64_t id;   // id of the region
     void* ptr;     // pointer to the start of the region
     size_t size;   // region size
@@ -34,10 +53,19 @@ using FairMQRegionEventCallback = std::function<void(FairMQRegionInfo)>;
 class FairMQUnmanagedRegion
 {
   public:
+    FairMQUnmanagedRegion() {}
+    FairMQUnmanagedRegion(FairMQTransportFactory* factory): fTransport(factory) {}
+
     virtual void* GetData() const = 0;
     virtual size_t GetSize() const = 0;
 
+    FairMQTransportFactory* GetTransport() { return fTransport; }
+    void SetTransport(FairMQTransportFactory* transport) { fTransport = transport; }
+
     virtual ~FairMQUnmanagedRegion() {};
+
+  private:
+    FairMQTransportFactory* fTransport{nullptr};
 };
 
 using FairMQUnmanagedRegionPtr = std::unique_ptr<FairMQUnmanagedRegion>;
diff --git a/fairmq/nanomsg/FairMQTransportFactoryNN.cxx b/fairmq/nanomsg/FairMQTransportFactoryNN.cxx
index f2f3dbb1..6eb53966 100644
--- a/fairmq/nanomsg/FairMQTransportFactoryNN.cxx
+++ b/fairmq/nanomsg/FairMQTransportFactoryNN.cxx
@@ -65,14 +65,14 @@ FairMQPollerPtr FairMQTransportFactoryNN::CreatePoller(const unordered_map<strin
     return unique_ptr<FairMQPoller>(new FairMQPollerNN(channelsMap, channelList));
 }
 
-FairMQUnmanagedRegionPtr FairMQTransportFactoryNN::CreateUnmanagedRegion(const size_t size, FairMQRegionCallback callback, const std::string& path /* = "" */, int flags /* = 0 */) const
+FairMQUnmanagedRegionPtr FairMQTransportFactoryNN::CreateUnmanagedRegion(const size_t size, FairMQRegionCallback callback, const std::string& path /* = "" */, int flags /* = 0 */)
 {
-    return unique_ptr<FairMQUnmanagedRegion>(new FairMQUnmanagedRegionNN(size, callback, path, flags));
+    return unique_ptr<FairMQUnmanagedRegion>(new FairMQUnmanagedRegionNN(size, callback, path, flags, this));
 }
 
-FairMQUnmanagedRegionPtr FairMQTransportFactoryNN::CreateUnmanagedRegion(const size_t size, const int64_t userFlags, FairMQRegionCallback callback, const std::string& path /* = "" */, int flags /* = 0 */) const
+FairMQUnmanagedRegionPtr FairMQTransportFactoryNN::CreateUnmanagedRegion(const size_t size, const int64_t userFlags, FairMQRegionCallback callback, const std::string& path /* = "" */, int flags /* = 0 */)
 {
-    return unique_ptr<FairMQUnmanagedRegion>(new FairMQUnmanagedRegionNN(size, userFlags, callback, path, flags));
+    return unique_ptr<FairMQUnmanagedRegion>(new FairMQUnmanagedRegionNN(size, userFlags, callback, path, flags, this));
 }
 
 fair::mq::Transport FairMQTransportFactoryNN::GetType() const
diff --git a/fairmq/nanomsg/FairMQTransportFactoryNN.h b/fairmq/nanomsg/FairMQTransportFactoryNN.h
index d573ec20..b80a3f33 100644
--- a/fairmq/nanomsg/FairMQTransportFactoryNN.h
+++ b/fairmq/nanomsg/FairMQTransportFactoryNN.h
@@ -36,8 +36,8 @@ class FairMQTransportFactoryNN final : public FairMQTransportFactory
     FairMQPollerPtr CreatePoller(const std::vector<FairMQChannel*>& channels) const override;
     FairMQPollerPtr CreatePoller(const std::unordered_map<std::string, std::vector<FairMQChannel>>& channelsMap, const std::vector<std::string>& channelList) const override;
 
-    FairMQUnmanagedRegionPtr CreateUnmanagedRegion(const size_t size, FairMQRegionCallback callback, const std::string& path = "", int flags = 0) const override;
-    FairMQUnmanagedRegionPtr CreateUnmanagedRegion(const size_t size, int64_t userFlags, FairMQRegionCallback callback = nullptr, const std::string& path = "", int flags = 0) const override;
+    FairMQUnmanagedRegionPtr CreateUnmanagedRegion(const size_t size, FairMQRegionCallback callback, const std::string& path = "", int flags = 0) override;
+    FairMQUnmanagedRegionPtr CreateUnmanagedRegion(const size_t size, int64_t userFlags, FairMQRegionCallback callback = nullptr, const std::string& path = "", int flags = 0) override;
 
     void SubscribeToRegionEvents(FairMQRegionEventCallback /* callback */) override { LOG(error) << "SubscribeToRegionEvents not yet implemented for nanomsg"; }
     void UnsubscribeFromRegionEvents() override { LOG(error) << "UnsubscribeFromRegionEvents not yet implemented for nanomsg"; }
diff --git a/fairmq/nanomsg/FairMQUnmanagedRegionNN.cxx b/fairmq/nanomsg/FairMQUnmanagedRegionNN.cxx
index b651b6cd..638f0646 100644
--- a/fairmq/nanomsg/FairMQUnmanagedRegionNN.cxx
+++ b/fairmq/nanomsg/FairMQUnmanagedRegionNN.cxx
@@ -11,15 +11,17 @@
 
 using namespace std;
 
-FairMQUnmanagedRegionNN::FairMQUnmanagedRegionNN(const size_t size, FairMQRegionCallback callback, const std::string& /*path = "" */, int /*flags = 0 */)
-    : fBuffer(malloc(size))
+FairMQUnmanagedRegionNN::FairMQUnmanagedRegionNN(const size_t size, FairMQRegionCallback callback, const std::string& /*path = "" */, int /*flags = 0 */, FairMQTransportFactory* factory /* = nullptr */)
+    : FairMQUnmanagedRegion(factory)
+    , fBuffer(malloc(size))
     , fSize(size)
     , fCallback(callback)
 {
 }
 
-FairMQUnmanagedRegionNN::FairMQUnmanagedRegionNN(const size_t size, const int64_t /*userFlags*/, FairMQRegionCallback callback, const std::string& /*path = "" */, int /*flags = 0 */)
-    : fBuffer(malloc(size))
+FairMQUnmanagedRegionNN::FairMQUnmanagedRegionNN(const size_t size, const int64_t /*userFlags*/, FairMQRegionCallback callback, const std::string& /*path = "" */, int /*flags = 0 */, FairMQTransportFactory* factory /* = nullptr */)
+    : FairMQUnmanagedRegion(factory)
+    , fBuffer(malloc(size))
     , fSize(size)
     , fCallback(callback)
 {
diff --git a/fairmq/nanomsg/FairMQUnmanagedRegionNN.h b/fairmq/nanomsg/FairMQUnmanagedRegionNN.h
index ca9f54de..6a4ac668 100644
--- a/fairmq/nanomsg/FairMQUnmanagedRegionNN.h
+++ b/fairmq/nanomsg/FairMQUnmanagedRegionNN.h
@@ -19,8 +19,8 @@ class FairMQUnmanagedRegionNN final : public FairMQUnmanagedRegion
     friend class FairMQSocketNN;
 
   public:
-    FairMQUnmanagedRegionNN(const size_t size, FairMQRegionCallback callback, const std::string& path = "", int flags = 0);
-    FairMQUnmanagedRegionNN(const size_t size, const int64_t userFlags, FairMQRegionCallback callback, const std::string& path = "", int flags = 0);
+    FairMQUnmanagedRegionNN(const size_t size, FairMQRegionCallback callback, const std::string& path = "", int flags = 0, FairMQTransportFactory* factory = nullptr);
+    FairMQUnmanagedRegionNN(const size_t size, const int64_t userFlags, FairMQRegionCallback callback, const std::string& path = "", int flags = 0, FairMQTransportFactory* factory = nullptr);
 
     FairMQUnmanagedRegionNN(const FairMQUnmanagedRegionNN&) = delete;
     FairMQUnmanagedRegionNN operator=(const FairMQUnmanagedRegionNN&) = delete;
diff --git a/fairmq/ofi/TransportFactory.cxx b/fairmq/ofi/TransportFactory.cxx
index 7be2ea51..918f76df 100644
--- a/fairmq/ofi/TransportFactory.cxx
+++ b/fairmq/ofi/TransportFactory.cxx
@@ -85,12 +85,12 @@ auto TransportFactory::CreatePoller(const unordered_map<string, vector<FairMQCha
     // return PollerPtr{new Poller(channelsMap, channelList)};
 }
 
-auto TransportFactory::CreateUnmanagedRegion(const size_t /*size*/, FairMQRegionCallback /*callback*/, const std::string& /* path = "" */, int /* flags = 0 */) const -> UnmanagedRegionPtr
+auto TransportFactory::CreateUnmanagedRegion(const size_t /*size*/, FairMQRegionCallback /*callback*/, const std::string& /* path = "" */, int /* flags = 0 */) -> UnmanagedRegionPtr
 {
     throw runtime_error{"Not yet implemented UMR."};
 }
 
-auto TransportFactory::CreateUnmanagedRegion(const size_t /*size*/, const int64_t /*userFlags*/, FairMQRegionCallback /*callback*/, const std::string& /* path = "" */, int /* flags = 0 */) const -> UnmanagedRegionPtr
+auto TransportFactory::CreateUnmanagedRegion(const size_t /*size*/, const int64_t /*userFlags*/, FairMQRegionCallback /*callback*/, const std::string& /* path = "" */, int /* flags = 0 */) -> UnmanagedRegionPtr
 {
     throw runtime_error{"Not yet implemented UMR."};
 }
diff --git a/fairmq/ofi/TransportFactory.h b/fairmq/ofi/TransportFactory.h
index c1afe174..2b3fcf89 100644
--- a/fairmq/ofi/TransportFactory.h
+++ b/fairmq/ofi/TransportFactory.h
@@ -46,8 +46,8 @@ class TransportFactory final : public FairMQTransportFactory
     auto CreatePoller(const std::vector<FairMQChannel*>& channels) const -> PollerPtr override;
     auto CreatePoller(const std::unordered_map<std::string, std::vector<FairMQChannel>>& channelsMap, const std::vector<std::string>& channelList) const -> PollerPtr override;
 
-    auto CreateUnmanagedRegion(const size_t size, RegionCallback callback = nullptr, const std::string& path = "", int flags = 0) const -> UnmanagedRegionPtr override;
-    auto CreateUnmanagedRegion(const size_t size, int64_t userFlags, RegionCallback callback = nullptr, const std::string& path = "", int flags = 0) const -> UnmanagedRegionPtr override;
+    auto CreateUnmanagedRegion(const size_t size, RegionCallback callback = nullptr, const std::string& path = "", int flags = 0) -> UnmanagedRegionPtr override;
+    auto CreateUnmanagedRegion(const size_t size, int64_t userFlags, RegionCallback callback = nullptr, const std::string& path = "", int flags = 0) -> UnmanagedRegionPtr override;
 
     void SubscribeToRegionEvents(RegionEventCallback /* callback */) override { LOG(error) << "SubscribeToRegionEvents not yet implemented for OFI"; }
     void UnsubscribeFromRegionEvents() override { LOG(error) << "UnsubscribeFromRegionEvents not yet implemented for OFI"; }
diff --git a/fairmq/shmem/TransportFactory.cxx b/fairmq/shmem/TransportFactory.cxx
index ed6bca02..46dc3675 100644
--- a/fairmq/shmem/TransportFactory.cxx
+++ b/fairmq/shmem/TransportFactory.cxx
@@ -159,14 +159,14 @@ PollerPtr TransportFactory::CreatePoller(const unordered_map<string, vector<Fair
     return tools::make_unique<Poller>(channelsMap, channelList);
 }
 
-UnmanagedRegionPtr TransportFactory::CreateUnmanagedRegion(const size_t size, RegionCallback callback, const std::string& path /* = "" */, int flags /* = 0 */) const
+UnmanagedRegionPtr TransportFactory::CreateUnmanagedRegion(const size_t size, RegionCallback callback, const std::string& path /* = "" */, int flags /* = 0 */)
 {
-    return tools::make_unique<UnmanagedRegion>(*fManager, size, callback, path, flags);
+    return tools::make_unique<UnmanagedRegion>(*fManager, size, callback, path, flags, this);
 }
 
-UnmanagedRegionPtr TransportFactory::CreateUnmanagedRegion(const size_t size, const int64_t userFlags, RegionCallback callback, const std::string& path /* = "" */, int flags /* = 0 */) const
+UnmanagedRegionPtr TransportFactory::CreateUnmanagedRegion(const size_t size, const int64_t userFlags, RegionCallback callback, const std::string& path /* = "" */, int flags /* = 0 */)
 {
-    return tools::make_unique<UnmanagedRegion>(*fManager, size, userFlags, callback, path, flags);
+    return tools::make_unique<UnmanagedRegion>(*fManager, size, userFlags, callback, path, flags, this);
 }
 
 void TransportFactory::SubscribeToRegionEvents(RegionEventCallback callback)
diff --git a/fairmq/shmem/TransportFactory.h b/fairmq/shmem/TransportFactory.h
index 97136e66..fbcc309b 100644
--- a/fairmq/shmem/TransportFactory.h
+++ b/fairmq/shmem/TransportFactory.h
@@ -49,8 +49,8 @@ class TransportFactory final : public fair::mq::TransportFactory
     PollerPtr CreatePoller(const std::vector<FairMQChannel*>& channels) const override;
     PollerPtr CreatePoller(const std::unordered_map<std::string, std::vector<FairMQChannel>>& channelsMap, const std::vector<std::string>& channelList) const override;
 
-    UnmanagedRegionPtr CreateUnmanagedRegion(const size_t size, RegionCallback callback = nullptr, const std::string& path = "", int flags = 0) const override;
-    UnmanagedRegionPtr CreateUnmanagedRegion(const size_t size, int64_t userFlags, RegionCallback callback = nullptr, const std::string& path = "", int flags = 0) const override;
+    UnmanagedRegionPtr CreateUnmanagedRegion(const size_t size, RegionCallback callback = nullptr, const std::string& path = "", int flags = 0) override;
+    UnmanagedRegionPtr CreateUnmanagedRegion(const size_t size, int64_t userFlags, RegionCallback callback = nullptr, const std::string& path = "", int flags = 0) override;
 
     void SubscribeToRegionEvents(RegionEventCallback callback) override;
     void UnsubscribeFromRegionEvents() override;
diff --git a/fairmq/shmem/UnmanagedRegion.h b/fairmq/shmem/UnmanagedRegion.h
index 8d7a47a6..c034e9d8 100644
--- a/fairmq/shmem/UnmanagedRegion.h
+++ b/fairmq/shmem/UnmanagedRegion.h
@@ -36,12 +36,13 @@ class UnmanagedRegion final : public fair::mq::UnmanagedRegion
     friend class Socket;
 
   public:
-    UnmanagedRegion(Manager& manager, const size_t size, RegionCallback callback, const std::string& path = "", int flags = 0)
-        : UnmanagedRegion(manager, size, 0, callback, path, flags)
+    UnmanagedRegion(Manager& manager, const size_t size, RegionCallback callback, const std::string& path = "", int flags = 0, FairMQTransportFactory* factory = nullptr)
+        : UnmanagedRegion(manager, size, 0, callback, path, flags, factory)
     {}
 
-    UnmanagedRegion(Manager& manager, const size_t size, const int64_t userFlags, RegionCallback callback, const std::string& path = "", int flags = 0)
-        : fManager(manager)
+    UnmanagedRegion(Manager& manager, const size_t size, const int64_t userFlags, RegionCallback callback, const std::string& path = "", int flags = 0, FairMQTransportFactory* factory = nullptr)
+        : FairMQUnmanagedRegion(factory)
+        , fManager(manager)
         , fRegion(nullptr)
         , fRegionId(0)
     {
diff --git a/fairmq/zeromq/FairMQTransportFactoryZMQ.cxx b/fairmq/zeromq/FairMQTransportFactoryZMQ.cxx
index 73ebc90f..1bd434ba 100644
--- a/fairmq/zeromq/FairMQTransportFactoryZMQ.cxx
+++ b/fairmq/zeromq/FairMQTransportFactoryZMQ.cxx
@@ -9,6 +9,8 @@
 #include "FairMQTransportFactoryZMQ.h"
 #include <zmq.h>
 
+#include <algorithm> // find_if
+
 using namespace std;
 
 fair::mq::Transport FairMQTransportFactoryZMQ::fTransportType = fair::mq::Transport::ZMQ;
@@ -16,6 +18,7 @@ fair::mq::Transport FairMQTransportFactoryZMQ::fTransportType = fair::mq::Transp
 FairMQTransportFactoryZMQ::FairMQTransportFactoryZMQ(const string& id, const fair::mq::ProgOptions* config)
     : FairMQTransportFactory(id)
     , fContext(zmq_ctx_new())
+    , fRegionCounter(0)
 {
     int major, minor, patch;
     zmq_version(&major, &minor, &patch);
@@ -80,7 +83,7 @@ FairMQPollerPtr FairMQTransportFactoryZMQ::CreatePoller(const vector<FairMQChann
     return unique_ptr<FairMQPoller>(new FairMQPollerZMQ(channels));
 }
 
-FairMQPollerPtr FairMQTransportFactoryZMQ::CreatePoller(const std::vector<FairMQChannel*>& channels) const
+FairMQPollerPtr FairMQTransportFactoryZMQ::CreatePoller(const vector<FairMQChannel*>& channels) const
 {
     return unique_ptr<FairMQPoller>(new FairMQPollerZMQ(channels));
 }
@@ -90,14 +93,93 @@ FairMQPollerPtr FairMQTransportFactoryZMQ::CreatePoller(const unordered_map<stri
     return unique_ptr<FairMQPoller>(new FairMQPollerZMQ(channelsMap, channelList));
 }
 
-FairMQUnmanagedRegionPtr FairMQTransportFactoryZMQ::CreateUnmanagedRegion(const size_t size, FairMQRegionCallback callback, const std::string& path /* = "" */, int flags /* = 0 */) const
+FairMQUnmanagedRegionPtr FairMQTransportFactoryZMQ::CreateUnmanagedRegion(const size_t size, FairMQRegionCallback callback, const string& path /* = "" */, int flags /* = 0 */)
 {
-    return unique_ptr<FairMQUnmanagedRegion>(new FairMQUnmanagedRegionZMQ(size, callback, path, flags));
+    return CreateUnmanagedRegion(size, 0, callback, path, flags);
 }
 
-FairMQUnmanagedRegionPtr FairMQTransportFactoryZMQ::CreateUnmanagedRegion(const size_t size, const int64_t userFlags, FairMQRegionCallback callback, const std::string& path /* = "" */, int flags /* = 0 */) const
+FairMQUnmanagedRegionPtr FairMQTransportFactoryZMQ::CreateUnmanagedRegion(const size_t size, const int64_t userFlags, FairMQRegionCallback callback, const string& path /* = "" */, int flags /* = 0 */)
 {
-    return unique_ptr<FairMQUnmanagedRegion>(new FairMQUnmanagedRegionZMQ(size, userFlags, callback, path, flags));
+    unique_ptr<FairMQUnmanagedRegion> ptr = nullptr;
+    {
+        lock_guard<mutex> lock(fMtx);
+
+        ++fRegionCounter;
+        ptr = unique_ptr<FairMQUnmanagedRegion>(new FairMQUnmanagedRegionZMQ(fRegionCounter, size, userFlags, callback, path, flags, this));
+        auto zPtr = static_cast<FairMQUnmanagedRegionZMQ*>(ptr.get());
+        fRegionInfos.emplace_back(zPtr->GetId(), zPtr->GetData(), zPtr->GetSize(), zPtr->GetUserFlags(), fair::mq::RegionEvent::created);
+        fRegionEvents.emplace(zPtr->GetId(), zPtr->GetData(), zPtr->GetSize(), zPtr->GetUserFlags(), fair::mq::RegionEvent::created);
+    }
+    fRegionEventsCV.notify_one();
+    return ptr;
+}
+
+void FairMQTransportFactoryZMQ::SubscribeToRegionEvents(FairMQRegionEventCallback callback)
+{
+    if (fRegionEventThread.joinable()) {
+        LOG(debug) << "Already subscribed. Overwriting previous subscription.";
+        {
+            lock_guard<mutex> lock(fMtx);
+            fRegionEventsSubscriptionActive = false;
+        }
+        fRegionEventsCV.notify_one();
+        fRegionEventThread.join();
+    }
+    lock_guard<mutex> lock(fMtx);
+    fRegionEventCallback = callback;
+    fRegionEventsSubscriptionActive = true;
+    fRegionEventThread = thread(&FairMQTransportFactoryZMQ::RegionEventsSubscription, this);
+}
+
+void FairMQTransportFactoryZMQ::UnsubscribeFromRegionEvents()
+{
+    if (fRegionEventThread.joinable()) {
+        unique_lock<mutex> lock(fMtx);
+        fRegionEventsSubscriptionActive = false;
+        lock.unlock();
+        fRegionEventsCV.notify_one();
+        fRegionEventThread.join();
+        lock.lock();
+        fRegionEventCallback = nullptr;
+    }
+}
+
+void FairMQTransportFactoryZMQ::RegionEventsSubscription()
+{
+    unique_lock<mutex> lock(fMtx);
+    while (fRegionEventsSubscriptionActive) {
+
+        while (!fRegionEvents.empty()) {
+            auto i = fRegionEvents.front();
+            fRegionEventCallback(i);
+            fRegionEvents.pop();
+        }
+        fRegionEventsCV.wait(lock, [&]() { return !fRegionEventsSubscriptionActive || !fRegionEvents.empty(); });
+    }
+}
+
+vector<fair::mq::RegionInfo> FairMQTransportFactoryZMQ::GetRegionInfo()
+{
+    lock_guard<mutex> lock(fMtx);
+    return fRegionInfos;
+}
+
+void FairMQTransportFactoryZMQ::RemoveRegion(uint64_t id)
+{
+    {
+        lock_guard<mutex> lock(fMtx);
+        auto it = find_if(fRegionInfos.begin(), fRegionInfos.end(), [id](const fair::mq::RegionInfo& i) {
+            return i.id == id;
+        });
+        if (it != fRegionInfos.end()) {
+            fRegionEvents.push(*it);
+            fRegionEvents.back().event = fair::mq::RegionEvent::destroyed;
+            fRegionInfos.erase(it);
+        } else {
+            LOG(error) << "RemoveRegion: given id (" << id << ") not found.";
+        }
+    }
+    fRegionEventsCV.notify_one();
 }
 
 fair::mq::Transport FairMQTransportFactoryZMQ::GetType() const
@@ -108,23 +190,19 @@ fair::mq::Transport FairMQTransportFactoryZMQ::GetType() const
 FairMQTransportFactoryZMQ::~FairMQTransportFactoryZMQ()
 {
     LOG(debug) << "Destroying ZeroMQ transport...";
-    if (fContext)
-    {
-        if (zmq_ctx_term(fContext) != 0)
-        {
-            if (errno == EINTR)
-            {
+
+    UnsubscribeFromRegionEvents();
+
+    if (fContext) {
+        if (zmq_ctx_term(fContext) != 0) {
+            if (errno == EINTR) {
                 LOG(error) << " failed closing context, reason: " << zmq_strerror(errno);
-            }
-            else
-            {
+            } else {
                 fContext = nullptr;
                 return;
             }
         }
-    }
-    else
-    {
+    } else {
         LOG(error) << "context not available for shutdown";
     }
 }
diff --git a/fairmq/zeromq/FairMQTransportFactoryZMQ.h b/fairmq/zeromq/FairMQTransportFactoryZMQ.h
index 6a05163d..07423acd 100644
--- a/fairmq/zeromq/FairMQTransportFactoryZMQ.h
+++ b/fairmq/zeromq/FairMQTransportFactoryZMQ.h
@@ -15,9 +15,6 @@
 #ifndef FAIRMQTRANSPORTFACTORYZMQ_H_
 #define FAIRMQTRANSPORTFACTORYZMQ_H_
 
-#include <vector>
-#include <string>
-
 #include "FairMQTransportFactory.h"
 #include "FairMQMessageZMQ.h"
 #include "FairMQSocketZMQ.h"
@@ -25,6 +22,14 @@
 #include "FairMQUnmanagedRegionZMQ.h"
 #include <fairmq/ProgOptions.h>
 
+#include <condition_variable>
+#include <functional>
+#include <mutex>
+#include <queue>
+#include <string>
+#include <thread>
+#include <vector>
+
 class FairMQTransportFactoryZMQ final : public FairMQTransportFactory
 {
   public:
@@ -32,8 +37,6 @@ class FairMQTransportFactoryZMQ final : public FairMQTransportFactory
     FairMQTransportFactoryZMQ(const FairMQTransportFactoryZMQ&) = delete;
     FairMQTransportFactoryZMQ operator=(const FairMQTransportFactoryZMQ&) = delete;
 
-    ~FairMQTransportFactoryZMQ() override;
-
     FairMQMessagePtr CreateMessage() override;
     FairMQMessagePtr CreateMessage(const size_t size) override;
     FairMQMessagePtr CreateMessage(void* data, const size_t size, fairmq_free_fn* ffn, void* hint = nullptr) override;
@@ -45,12 +48,14 @@ class FairMQTransportFactoryZMQ final : public FairMQTransportFactory
     FairMQPollerPtr CreatePoller(const std::vector<FairMQChannel*>& channels) const override;
     FairMQPollerPtr CreatePoller(const std::unordered_map<std::string, std::vector<FairMQChannel>>& channelsMap, const std::vector<std::string>& channelList) const override;
 
-    FairMQUnmanagedRegionPtr CreateUnmanagedRegion(const size_t size, FairMQRegionCallback callback, const std::string& path = "", int flags = 0) const override;
-    FairMQUnmanagedRegionPtr CreateUnmanagedRegion(const size_t size, int64_t userFlags, FairMQRegionCallback callback = nullptr, const std::string& path = "", int flags = 0) const override;
+    FairMQUnmanagedRegionPtr CreateUnmanagedRegion(const size_t size, FairMQRegionCallback callback, const std::string& path = "", int flags = 0) override;
+    FairMQUnmanagedRegionPtr CreateUnmanagedRegion(const size_t size, const int64_t userFlags, FairMQRegionCallback callback, const std::string& path = "", int flags = 0) override;
 
-    void SubscribeToRegionEvents(FairMQRegionEventCallback /* callback */) override { LOG(error) << "SubscribeToRegionEvents not yet implemented for ZeroMQ"; }
-    void UnsubscribeFromRegionEvents() override { LOG(error) << "UnsubscribeFromRegionEvents not yet implemented for ZeroMQ"; }
-    std::vector<FairMQRegionInfo> GetRegionInfo() override { LOG(error) << "GetRegionInfo not yet implemented for ZeroMQ, returning empty vector"; return std::vector<FairMQRegionInfo>(); }
+    void SubscribeToRegionEvents(FairMQRegionEventCallback callback) override;
+    void UnsubscribeFromRegionEvents() override;
+    void RegionEventsSubscription();
+    std::vector<fair::mq::RegionInfo> GetRegionInfo() override;
+    void RemoveRegion(uint64_t id);
 
     fair::mq::Transport GetType() const override;
 
@@ -58,9 +63,20 @@ class FairMQTransportFactoryZMQ final : public FairMQTransportFactory
     void Resume() override { FairMQSocketZMQ::Resume(); }
     void Reset() override {}
 
+    ~FairMQTransportFactoryZMQ() override;
+
   private:
     static fair::mq::Transport fTransportType;
     void* fContext;
+
+    std::mutex fMtx;
+    uint64_t fRegionCounter;
+    std::condition_variable fRegionEventsCV;
+    std::vector<fair::mq::RegionInfo> fRegionInfos;
+    std::queue<fair::mq::RegionInfo> fRegionEvents;
+    std::thread fRegionEventThread;
+    std::function<void(fair::mq::RegionInfo)> fRegionEventCallback;
+    bool fRegionEventsSubscriptionActive;
 };
 
 #endif /* FAIRMQTRANSPORTFACTORYZMQ_H_ */
diff --git a/fairmq/zeromq/FairMQUnmanagedRegionZMQ.cxx b/fairmq/zeromq/FairMQUnmanagedRegionZMQ.cxx
index 66184e51..ec02fb4c 100644
--- a/fairmq/zeromq/FairMQUnmanagedRegionZMQ.cxx
+++ b/fairmq/zeromq/FairMQUnmanagedRegionZMQ.cxx
@@ -7,23 +7,17 @@
  ********************************************************************************/
 
 #include "FairMQUnmanagedRegionZMQ.h"
+#include "FairMQTransportFactoryZMQ.h"
 #include "FairMQLogger.h"
 
-using namespace std;
-
-FairMQUnmanagedRegionZMQ::FairMQUnmanagedRegionZMQ(const size_t size, FairMQRegionCallback callback, const std::string& /* path = "" */, int /* flags = 0 */)
-    : fBuffer(malloc(size))
+FairMQUnmanagedRegionZMQ::FairMQUnmanagedRegionZMQ(uint64_t id, const size_t size, int64_t userFlags, FairMQRegionCallback callback, const std::string& /* path = "" */, int /* flags = 0 */, FairMQTransportFactory* factory /* = nullptr */)
+    : FairMQUnmanagedRegion(factory)
+    , fId(id)
+    , fBuffer(malloc(size))
     , fSize(size)
+    , fUserFlags(userFlags)
     , fCallback(callback)
-{
-}
-
-FairMQUnmanagedRegionZMQ::FairMQUnmanagedRegionZMQ(const size_t size, int64_t /* userFlags */, FairMQRegionCallback callback, const std::string& /* path = "" */, int /* flags = 0 */)
-    : fBuffer(malloc(size))
-    , fSize(size)
-    , fCallback(callback)
-{
-}
+{}
 
 void* FairMQUnmanagedRegionZMQ::GetData() const
 {
@@ -38,5 +32,6 @@ size_t FairMQUnmanagedRegionZMQ::GetSize() const
 FairMQUnmanagedRegionZMQ::~FairMQUnmanagedRegionZMQ()
 {
     LOG(debug) << "destroying region";
+    static_cast<FairMQTransportFactoryZMQ*>(GetTransport())->RemoveRegion(fId);
     free(fBuffer);
 }
diff --git a/fairmq/zeromq/FairMQUnmanagedRegionZMQ.h b/fairmq/zeromq/FairMQUnmanagedRegionZMQ.h
index 025690ed..751f7149 100644
--- a/fairmq/zeromq/FairMQUnmanagedRegionZMQ.h
+++ b/fairmq/zeromq/FairMQUnmanagedRegionZMQ.h
@@ -13,6 +13,7 @@
 
 #include <cstddef> // size_t
 #include <string>
+class FairMQTransportFactory;
 
 class FairMQUnmanagedRegionZMQ final : public FairMQUnmanagedRegion
 {
@@ -20,19 +21,23 @@ class FairMQUnmanagedRegionZMQ final : public FairMQUnmanagedRegion
     friend class FairMQMessageZMQ;
 
   public:
-    FairMQUnmanagedRegionZMQ(const size_t size, FairMQRegionCallback callback, const std::string& path = "", int flags = 0);
-    FairMQUnmanagedRegionZMQ(const size_t size, const int64_t userFlags, FairMQRegionCallback callback, const std::string& path = "", int flags = 0);
+    FairMQUnmanagedRegionZMQ(uint64_t id, const size_t size, int64_t userFlags, FairMQRegionCallback callback, const std::string& /* path = "" */, int /* flags = 0 */, FairMQTransportFactory* factory = nullptr);
+
     FairMQUnmanagedRegionZMQ(const FairMQUnmanagedRegionZMQ&) = delete;
     FairMQUnmanagedRegionZMQ operator=(const FairMQUnmanagedRegionZMQ&) = delete;
 
+    uint64_t GetId() const { return fId; }
     virtual void* GetData() const override;
     virtual size_t GetSize() const override;
+    int64_t GetUserFlags() const { return fUserFlags; }
 
     virtual ~FairMQUnmanagedRegionZMQ();
 
   private:
+    uint64_t fId;
     void* fBuffer;
     size_t fSize;
+    int64_t fUserFlags;
     FairMQRegionCallback fCallback;
 };