diff --git a/html/index.html b/html/index.html
index b52bdb4..370ba5e 100644
--- a/html/index.html
+++ b/html/index.html
@@ -827,7 +827,7 @@
                             <form id="callsign_filter_form">
                                 <label><span class="infoBlockTitleText">Filter by callsign or squawk:</span></label>
                                 <br>
-                                <input id="callsign_filter" name="callsign" type="text" class="searchInput" maxlength="128">
+                                <input id="callsign_filter" name="callsign" type="text" class="searchInput" maxlength="1024">
                                 <button class="formButton" type="submit">Filter</button>
                                 <button class="formButton" id="callsign_filter_reset_button">Reset</button>
 
@@ -836,7 +836,7 @@
                             <form id="type_filter_form">
                                 <label><span class="infoBlockTitleText">Filter by type:</span></label>
                                 <br>
-                                <input id="type_filter" name="type" type="text" class="searchInput" maxlength="128">
+                                <input id="type_filter" name="type" type="text" class="searchInput" maxlength="1024">
                                 <button class="formButton" type="submit">Filter</button>
                                 <button class="formButton" id="type_filter_reset_button">Reset</button>
 
@@ -845,12 +845,22 @@
                             <form id="description_filter_form">
                                 <label><span class="infoBlockTitleText">Filter by type description:</span></label>
                                 <br>
-                                <input id="description_filter" name="description" type="text" class="searchInput" maxlength="128">
+                                <input id="description_filter" name="description" type="text" class="searchInput" maxlength="1024">
                                 <button class="formButton" type="submit">Filter</button>
                                 <button class="formButton" id="description_filter_reset_button">Reset</button>
 
                             </form>
 
+                            <form id="icao_filter_form">
+                                <label><span class="infoBlockTitleText">Filter by icao hex id:</span></label>
+                                <br>
+                                <input id="icao_filter" name="description" type="text" class="searchInput" maxlength="1024">
+                                <button class="formButton" type="submit">Filter</button>
+                                <button class="formButton" id="icao_filter_reset_button">Reset</button>
+
+                            </form>
+
+
                         </div> <!-- filter_block -->
 
 						<div id="planes_table">
diff --git a/html/planeObject.js b/html/planeObject.js
index 823134e..264713c 100644
--- a/html/planeObject.js
+++ b/html/planeObject.js
@@ -184,6 +184,10 @@ PlaneObject.prototype.isFiltered = function() {
     if (!filterTracks && this.altFiltered(this.altitude))
         return true;
 
+    if (PlaneFilter.icao && !this.icao.match(PlaneFilter.icao) ) {
+        return true;
+    }
+
     if (PlaneFilter.type && (!this.icaoType || !this.icaoType.match(PlaneFilter.type)) ) {
         return true;
     }
@@ -2023,8 +2027,8 @@ PlaneObject.prototype.milRange = function() {
 
         //400000-40003f = united kingdom mil_1(ra)
         || this.icao.match(/^4000[0-3]/)
-        //43c000-43ffff = united kingdom mil(ra)
-        || this.icao.match(/^43[c-f]/)
+        //43c000-43cfff = united kingdom mil(ra)
+        || this.icao.match(/^43c/)
 
         //444000-447fff = austria mil(aq)
         || (this.icao.match(/^44[4-7]/) && this.icao != '447ac7')
diff --git a/html/script.js b/html/script.js
index ad16607..b82fbac 100644
--- a/html/script.js
+++ b/html/script.js
@@ -857,6 +857,7 @@ function init_page() {
     $("#callsign_filter_form").submit(updateCallsignFilter);
     $("#type_filter_form").submit(updateTypeFilter);
     $("#description_filter_form").submit(updateDescriptionFilter);
+    $("#icao_filter_form").submit(updateIcaoFilter);
 
     $("#search_form").submit(onSearch);
     $("#jump_form").submit(onJump);
@@ -873,6 +874,7 @@ function init_page() {
     $("#callsign_filter_reset_button").click(onResetCallsignFilter);
     $("#type_filter_reset_button").click(onResetTypeFilter);
     $("#description_filter_reset_button").click(onResetDescriptionFilter);
+    $("#icao_filter_reset_button").click(onResetIcaoFilter);
 
     // check if the altitude color values are default to enable the altitude filter
     if (ColorByAlt.air.h.length === 3 && ColorByAlt.air.h[0].alt === 2000 && ColorByAlt.air.h[0].val === 20 && ColorByAlt.air.h[1].alt === 10000 && ColorByAlt.air.h[1].val === 140 && ColorByAlt.air.h[2].alt === 40000 && ColorByAlt.air.h[2].val === 300) {
@@ -3206,6 +3208,25 @@ function updateTypeFilter(e) {
     refreshHighlighted();
     refreshTableInfo();
 }
+function onResetIcaoFilter(e) {
+    $("#icao_filter").val("");
+    $("#icao_filter").blur();
+
+    updateIcaoFilter();
+}
+function updateIcaoFilter(e) {
+    if (e)
+        e.preventDefault();
+
+    $("#icao_filter").blur();
+    let icao = $("#icao_filter").val().trim();
+
+    PlaneFilter.icao = icao.toLowerCase();
+
+    refreshSelected();
+    refreshHighlighted();
+    refreshTableInfo();
+}
 
 function onResetDescriptionFilter(e) {
     $("#description_filter").val("");