diff --git a/aprsd/flask.py b/aprsd/flask.py
index bf1d9bc..7caf5f8 100644
--- a/aprsd/flask.py
+++ b/aprsd/flask.py
@@ -302,6 +302,9 @@ class APRSDFlask(flask_classful.FlaskView):
             watch_count = 0
             watch_age = 0
 
+        sl = packets.SeenList()
+        seen_count = len(sl.callsigns)
+
         pm = plugin.PluginManager()
         plugins = pm.get_plugins()
         plugin_count = len(plugins)
@@ -343,6 +346,7 @@ class APRSDFlask(flask_classful.FlaskView):
             config_json=json.dumps(self.config.data),
             watch_count=watch_count,
             watch_age=watch_age,
+            seen_count=seen_count,
             plugin_count=plugin_count,
         )
 
diff --git a/aprsd/packets.py b/aprsd/packets.py
index 8e80432..63b6b6c 100644
--- a/aprsd/packets.py
+++ b/aprsd/packets.py
@@ -50,6 +50,7 @@ class PacketList:
             else:
                 self.total_recv += 1
             self.packet_list.append(packet)
+            SeenList().update_seen(packet)
 
     def get(self):
         with self.lock:
@@ -149,6 +150,35 @@ class WatchList:
             return False
 
 
+class SeenList:
+    """Global callsign seen list."""
+
+    _instance = None
+    callsigns = {}
+    config = None
+
+    def __new__(cls, *args, **kwargs):
+        if cls._instance is None:
+            cls._instance = super().__new__(cls)
+            cls._instance.lock = threading.Lock()
+            cls.callsigns = {}
+        return cls._instance
+
+    def update_seen(self, packet):
+        callsign = None
+        if "fromcall" in packet:
+            callsign = packet["fromcall"]
+        elif "from" in packet:
+            callsign = packet["from"]
+        if callsign not in self.callsigns:
+            self.callsigns[callsign] = {
+                "last": None,
+                "count": 0,
+            }
+        self.callsigns[callsign]["last"] = str(datetime.datetime.now())
+        self.callsigns[callsign]["count"] += 1
+
+
 def get_packet_type(packet):
     """Decode the packet type from the packet."""
 
diff --git a/aprsd/stats.py b/aprsd/stats.py
index d4678f3..0590ff7 100644
--- a/aprsd/stats.py
+++ b/aprsd/stats.py
@@ -201,6 +201,7 @@ class APRSDStats:
             }
 
         wl = packets.WatchList()
+        sl = packets.SeenList()
 
         stats = {
             "aprsd": {
@@ -211,6 +212,7 @@ class APRSDStats:
                 "memory_peak": self.memory_peak,
                 "memory_peak_str": utils.human_size(self.memory_peak),
                 "watch_list": wl.callsigns,
+                "seen_list": sl.callsigns,
             },
             "aprs-is": {
                 "server": self.aprsis_server,
diff --git a/aprsd/web/static/js/main.js b/aprsd/web/static/js/main.js
index fa48fbb..40b3942 100644
--- a/aprsd/web/static/js/main.js
+++ b/aprsd/web/static/js/main.js
@@ -58,11 +58,31 @@ function update_watchlist_from_packet(callsign, val) {
     //console.log(watchlist)
 }
 
+function update_seenlist( data ) {
+    var seendiv = $("#seenDiv");
+    var html_str = '<table class="ui celled striped table">'
+    html_str    += '<thead><tr><th>HAM Callsign</th><th>Age since last seen by APRSD</th>'
+    html_str    += '<th>Number of packets RX</th></tr></thead><tbody>'
+    seendiv.html('')
+    var seen_list = data["stats"]["aprsd"]["seen_list"]
+    var len = Object.keys(seen_list).length
+    $('#seen_count').html(len)
+    jQuery.each(seen_list, function(i, val) {
+        html_str += '<tr><td class="collapsing">'
+        html_str += '<img id="callsign_'+i+'" class="aprsd_1"></img>' + i + '</td>'
+        html_str += '<td>' + val["last"] + '</td>'
+        html_str += '<td>' + val["count"] + '</td></tr>'
+    });
+    html_str += "</tbody></table>";
+    seendiv.append(html_str);
+}
+
 function update_plugins( data ) {
     var plugindiv = $("#pluginDiv");
     var html_str = '<table class="ui celled striped table"><thead><tr>'
     html_str +=      '<th>Plugin Name</th><th>Plugin Enabled?</th>'
     html_str +=      '<th>Processed Packets</th><th>Sent Packets</th>'
+    html_str +=      '<th>Version</th>'
     html_str +=    '</tr></thead><tbody>'
     plugindiv.html('')
 
@@ -72,7 +92,9 @@ function update_plugins( data ) {
     for (var i=0; i<keys.length; i++) { // now lets iterate in sort order
         var key = keys[i];
         var val = plugins[key];
-        html_str += '<tr><td class="collapsing">' + key + '</td><td>' + val["enabled"] + '</td><td>' + val["rx"] + '</td><td>' + val["tx"] + '</td></tr>';
+        html_str += '<tr><td class="collapsing">' + key + '</td>';
+        html_str += '<td>' + val["enabled"] + '</td><td>' + val["rx"] + '</td>';
+        html_str += '<td>' + val["tx"] + '</td><td>' + val["version"] +'</td></tr>';
     }
     html_str += "</tbody></table>";
     plugindiv.append(html_str);
@@ -140,6 +162,7 @@ function start_update() {
                 success: function(data) {
                     update_stats(data);
                     update_watchlist(data);
+                    update_seenlist(data);
                     update_plugins(data);
                 },
                 complete: function() {
diff --git a/aprsd/web/templates/index.html b/aprsd/web/templates/index.html
index 8ccceee..b7e4f21 100644
--- a/aprsd/web/templates/index.html
+++ b/aprsd/web/templates/index.html
@@ -18,7 +18,6 @@
         <script src="/static/js/charts.js"></script>
         <script src="/static/js/tabs.js"></script>
         <script src="/static/js/send-message.js"></script>
-        <script src="/static/js/packets.js"></script>
         <script src="/static/js/logs.js"></script>
 
 
@@ -79,6 +78,7 @@
         <div class="ui top attached tabular menu">
             <div class="active item" data-tab="charts-tab">Charts</div>
             <div class="item" data-tab="msgs-tab">Messages</div>
+            <div class="item" data-tab="seen-tab">Seen List</div>
             <div class="item" data-tab="watch-tab">Watch List</div>
             <div class="item" data-tab="plugin-tab">Plugins</div>
             <div class="item" data-tab="config-tab">Config</div>
@@ -132,6 +132,13 @@
           </div>
         </div>
 
+        <div class="ui bottom attached tab segment" data-tab="seen-tab">
+            <h3 class="ui dividing header">
+                Callsign Seen List (<span id="seen_count">{{ seen_count }}</span>)
+            </h3>
+            <div id="seenDiv" class="ui mini text">Loading</div>
+        </div>
+
         <div class="ui bottom attached tab segment" data-tab="watch-tab">
             <h3 class="ui dividing header">
                 Callsign Watch List (<span id="watch_count">{{ watch_count }}</span>)