diff --git a/sys/include/net/gnrc/netreg.h b/sys/include/net/gnrc/netreg.h
index 11455c703ac0ecfd11494529a682b9a2c36ff78b..cea7d13635c5356d36957bdd364eb725932d92f4 100644
--- a/sys/include/net/gnrc/netreg.h
+++ b/sys/include/net/gnrc/netreg.h
@@ -333,6 +333,19 @@ void gnrc_netreg_unregister(gnrc_nettype_t type, gnrc_netreg_entry_t *entry);
  */
 gnrc_netreg_entry_t *gnrc_netreg_lookup(gnrc_nettype_t type, uint32_t demux_ctx);
 
+/**
+ * @brief   Returns number of entries with the same gnrc_netreg_entry_t::type and
+ *          gnrc_netreg_entry_t::demux_ctx.
+ *
+ * @param[in] type      Type of the protocol.
+ * @param[in] demux_ctx The demultiplexing context for the registered thread.
+ *                      See gnrc_netreg_entry_t::demux_ctx.
+ *
+ * @return  Number of entries with the same gnrc_netreg_entry_t::type and
+ *          gnrc_netreg_entry_t::demux_ctx as the given parameters.
+ */
+int gnrc_netreg_num(gnrc_nettype_t type, uint32_t demux_ctx);
+
 /**
  * @brief   Returns the next entry after @p entry with the same
  *          gnrc_netreg_entry_t::type and gnrc_netreg_entry_t::demux_ctx as the
diff --git a/sys/net/gnrc/netreg/gnrc_netreg.c b/sys/net/gnrc/netreg/gnrc_netreg.c
index 8d8ef83462185590a0d45a2b7131031e388142c1..c531ff997148379554ad7ae9cca8148f20104f13 100644
--- a/sys/net/gnrc/netreg/gnrc_netreg.c
+++ b/sys/net/gnrc/netreg/gnrc_netreg.c
@@ -96,6 +96,28 @@ gnrc_netreg_entry_t *gnrc_netreg_lookup(gnrc_nettype_t type, uint32_t demux_ctx)
     return _netreg_lookup(NULL, type, demux_ctx);
 }
 
+int gnrc_netreg_num(gnrc_nettype_t type, uint32_t demux_ctx)
+{
+    int num = 0;
+    gnrc_netreg_entry_t *entry;
+
+    if (_INVALID_TYPE(type)) {
+        return 0;
+    }
+
+    entry = netreg[type];
+
+    while (entry != NULL) {
+        if (entry->demux_ctx == demux_ctx) {
+            num++;
+        }
+
+        entry = entry->next;
+    }
+
+    return num;
+}
+
 gnrc_netreg_entry_t *gnrc_netreg_getnext(gnrc_netreg_entry_t *entry)
 {
     return (entry ? _netreg_lookup(entry, 0, entry->demux_ctx) : NULL);