diff --git a/server/webserver.py b/server/webserver.py
index 3a9029f..aab70b0 100644
--- a/server/webserver.py
+++ b/server/webserver.py
@@ -165,9 +165,16 @@ class WebServer:
                 response.status = 422
                 return json.dumps("Error - Frequency of " + str(spot.freq / 1000.0) + "kHz is not in a known band.", default=serialize_everything)
 
+            # Reject if grid formatting incorrect
+            if spot.dx_grid and not re.match(r"^([A-R]{2}[0-9]{2}[A-X]{2}[0-9]{2}[A-X]{2}|[A-R]{2}[0-9]{2}[A-X]{2}[0-9]{2}|[A-R]{2}[0-9]{2}[A-X]{2}|[A-R]{2}[0-9]{2})$", spot.dx_grid.upper()):
+                response.content_type = 'application/json'
+                response.status = 422
+                return json.dumps("Error - '" + spot.dx_grid + "' does not look like a valid Maidenhead grid.", default=serialize_everything)
+
             # infer missing data, and add it to our database.
             spot.source = "API"
-            spot.icon = "desktop"
+            if not spot.sig:
+                spot.icon = "desktop"
             spot.infer_missing()
             self.spots.add(spot.id, spot, expire=MAX_SPOT_AGE)
 
diff --git a/views/webpage_add_spot.tpl b/views/webpage_add_spot.tpl
index 8793409..2afd2ec 100644
--- a/views/webpage_add_spot.tpl
+++ b/views/webpage_add_spot.tpl
@@ -31,7 +31,11 @@
                     <input type="text" class="form-control" id="mode" placeholder="SSB" style="max-width: 6em;">
                 </div>
                 <div class="col-auto">
-                    <label for="comment" class="form-label">Comment</label>
+                    <label for="dx-grid" class="form-label">DX Grid (Optional)</label>
+                    <input type="text" class="form-control" id="dx-grid" placeholder="AA00aa" style="max-width: 8em;">
+                </div>
+                <div class="col-auto">
+                    <label for="comment" class="form-label">Comment (Optional)</label>
                     <input type="text" class="form-control" id="comment" placeholder="59 TNX QSO 73" style="max-width: 12em;">
                 </div>
                 <div class="col-auto">
diff --git a/webassets/js/add-spot.js b/webassets/js/add-spot.js
index 5d0c57a..24c9840 100644
--- a/webassets/js/add-spot.js
+++ b/webassets/js/add-spot.js
@@ -8,6 +8,7 @@ function addSpot() {
         var dx = $("#dx-call").val().toUpperCase();
         var freqStr = $("#freq").val();
         var mode = $("#mode").val().toUpperCase();
+        var dxGrid = $("#dx-grid").val();
         var comment = $("#comment").val();
         var de = $("#de-call").val().toUpperCase();
 
@@ -27,11 +28,17 @@ function addSpot() {
         if (mode != "") {
             spot["mode"] = mode;
         }
+        if (dxGrid != "") {
+            spot["dx_grid"] = dxGrid;
+        }
         if (comment != "") {
             spot["comment"] = comment;
         }
         if (de != "") {
             spot["de_call"] = de;
+        } else {
+            showAddSpotError("A spotter callsign is required in order to spot.");
+            return;
         }
         spot["time"] = moment.utc().valueOf() / 1000.0;
 
@@ -42,6 +49,7 @@ function addSpot() {
             timeout: 10000,
             success: async function (result) {
                 $("#result-good").html("<button type='button' class='btn btn-success' style='margin-top: 2em;'><i class='fa-solid fa-check'></i> OK</button>");
+                $("#result-bad").html("");
                 setTimeout(() => {
                     $("#result-good").hide();
                     window.location.replace("/");