diff --git a/ajax/networking/get_channel.php b/ajax/networking/get_channel.php
new file mode 100644
index 00000000..5285a3c0
--- /dev/null
+++ b/ajax/networking/get_channel.php
@@ -0,0 +1,17 @@
+<?php
+
+require('../../includes/csrf.php');
+include_once('../../includes/config.php');
+
+exec('cat '. RASPI_HOSTAPD_CONFIG, $hostapdconfig);
+$arrConfig = array();
+
+foreach ($hostapdconfig as $hostapdconfigline) {
+    if (strlen($hostapdconfigline) === 0) {
+        continue;
+    }
+    $arrLine = explode("=", $hostapdconfigline) ;
+    $arrConfig[$arrLine[0]]=$arrLine[1];
+};
+$channel = intval($arrConfig['channel']);
+echo json_encode($channel);
diff --git a/app/js/custom.js b/app/js/custom.js
index 40d62ba8..bba96088 100644
--- a/app/js/custom.js
+++ b/app/js/custom.js
@@ -91,31 +91,30 @@ function loadCurrentSettings(strInterface) {
 }
 
 function saveNetworkSettings(int) {
-        var frmInt = $('#frm-'+int).find(':input');
-        var arrFormData = {};
-        $.each(frmInt,function(i3,v3){
-            if($(v3).attr('type') == 'radio') {
-                arrFormData[$(v3).attr('id')] = $(v3).prop('checked');
-            } else {
-                arrFormData[$(v3).attr('id')] = $(v3).val();
-            }
-        });
-        arrFormData['interface'] = int;
-        $.post('ajax/networking/save_int_config.php',arrFormData,function(data){
-            var jsonData = JSON.parse(data);
-            $('#msgNetworking').html(msgShow(jsonData['return'],jsonData['output']));
-        });
+    var frmInt = $('#frm-'+int).find(':input');
+    var arrFormData = {};
+    $.each(frmInt,function(i3,v3){
+        if($(v3).attr('type') == 'radio') {
+		arrFormData[$(v3).attr('id')] = $(v3).prop('checked');
+    } else {
+	    arrFormData[$(v3).attr('id')] = $(v3).val();
+    }
+    });
+    arrFormData['interface'] = int;
+    $.post('ajax/networking/save_int_config.php',arrFormData,function(data){
+        var jsonData = JSON.parse(data);
+        $('#msgNetworking').html(msgShow(jsonData['return'],jsonData['output']));
+    });
 }
 
 function applyNetworkSettings() {
-        var int = $(this).data('int');
-        arrFormData = {};
-        arrFormData['generate'] = '';
-        $.post('ajax/networking/gen_int_config.php',arrFormData,function(data){
-            console.log(data);
-            var jsonData = JSON.parse(data);
-            $('#msgNetworking').html(msgShow(jsonData['return'],jsonData['output']));
-        });
+    var int = $(this).data('int');
+    arrFormData = {};
+    arrFormData['generate'] = '';
+    $.post('ajax/networking/gen_int_config.php',arrFormData,function(data){
+        var jsonData = JSON.parse(data);
+        $('#msgNetworking').html(msgShow(jsonData['return'],jsonData['output']));
+    });
 }
 
 $(document).on("click", ".js-add-dhcp-static-lease", function(e) {
@@ -126,7 +125,6 @@ $(document).on("click", ".js-add-dhcp-static-lease", function(e) {
     if (mac == "" || ip == "") {
         return;
     }
-
     var row = $("#js-dhcp-static-lease-row").html()
         .replace("{{ mac }}", mac)
         .replace("{{ ip }}", ip);
@@ -147,12 +145,10 @@ $(document).on("submit", ".js-dhcp-settings-form", function(e) {
 
 function setupBtns() {
     $('#btnSummaryRefresh').click(function(){getAllInterfaces();});
-
     $('.intsave').click(function(){
         var int = $(this).data('int');
         saveNetworkSettings(int);
     });
-
     $('.intapply').click(function(){
         applyNetworkSettings();
     });
@@ -173,6 +169,8 @@ function contentLoaded() {
             getAllInterfaces();
             setupTabs();
             setupBtns();
+        case "hostapd_conf":
+            loadChannel();
         break;
     }
 }
@@ -190,6 +188,61 @@ function loadWifiStations(refresh) {
 
 $(".js-reload-wifi-stations").on("click", loadWifiStations(true));
 
+function loadChannel() {
+    $.get('ajax/networking/get_channel.php',function(data){
+        jsonData = JSON.parse(data);
+        loadChannelSelect(jsonData);
+    });
+}
+
+/*
+Sets the wirelss channel select options based on hw_mode and country_code.
+
+Methodology: In North America up to channel 11 is the maximum allowed WiFi 2.4Ghz channel,
+except for the US that allows channel 12 & 13 in low power mode with additional restrictions.
+Canada allows channel 12 in low power mode. Because it's unsure if low powered mode can be
+supported the channels are not selectable for those countries. Also Uzbekistan and Colombia
+allow up to channel 11 as maximum channel on the 2.4Ghz WiFi band.
+Source: https://en.wikipedia.org/wiki/List_of_WLAN_channels
+Additional: https://git.kernel.org/pub/scm/linux/kernel/git/sforshee/wireless-regdb.git
+*/
+function loadChannelSelect(selected) {
+
+    // Fetch wireless regulatory data
+    $.getJSON("config/wireless.json", function(json) {
+        var hw_mode = $('#cbxhwmode').val();
+        var country_code = $('#cbxcountries').val();
+        var channel_select = $('#cbxchannel');
+        var data = json["wireless_regdb"];
+        var selectablechannels = Array.range(1,14);
+
+        // Assign array of countries to valid frequencies (channels)
+        var countries_2_4Ghz_max11ch = data["2_4GHz_max11ch"].countries;
+        var countries_2_4Ghz_max14ch = data["2_4GHz_max14ch"].countries;
+        var countries_5Ghz_max48ch = data["5Ghz_max48ch"].countries;
+
+        // Map selected hw_mode and country to determine channel list
+        if (($.inArray(country_code, countries_2_4Ghz_max11ch) !== -1) && (hw_mode !== 'ac') ) {
+            selectablechannels = data["2_4GHz_max11ch"].channels;
+        } else if (($.inArray(country_code, countries_2_4Ghz_max14ch) !== -1) && (hw_mode === 'b')) {
+            selectablechannels = data["2_4GHz_max14ch"].channels;
+        } else if (($.inArray(country_code, countries_5Ghz_max48ch) !== -1) && (hw_mode === 'ac')) {
+            selectablechannels = data["5Ghz_max48ch"].channels;
+        }
+
+        // Set channel select with available values
+        var selected = (typeof selected === 'undefined') ? selectablechannels[0] : selected;
+        channel_select.empty();
+        $.each(selectablechannels, function(key,value) {
+            channel_select.append($("<option></option>").attr("value", value).text(value));
+        });
+        channel_select.val(selected);
+    });
+}
+
+// Static Array method
+Array.range = (start, end) => Array.from({length: (end - start)}, (v, k) => k + start);
+
 $(document).on("click", ".js-toggle-password", function(e) {
     var button = $(e.target)
     var field  = $(button.data("target"));
diff --git a/config/config.php b/config/config.php
index 046e36a2..f89c1746 100755
--- a/config/config.php
+++ b/config/config.php
@@ -22,6 +22,9 @@ define('RASPI_OPENVPN_SERVER_CONFIG', '/etc/openvpn/server/server.conf');
 define('RASPI_TORPROXY_CONFIG', '/etc/tor/torrc');
 define('RASPI_LIGHTTPD_CONFIG', '/etc/lighttpd/lighttpd.conf');
 
+// Constants for CRDA wireless regulatory domain
+define('RASPI_5GHZ_ISO_ALPHA2', array('US'));
+
 // Optional services, set to true to enable.
 define('RASPI_WIFICLIENT_ENABLED', true);
 define('RASPI_HOTSPOT_ENABLED', true);
diff --git a/config/hostapd.conf b/config/hostapd.conf
index eea43887..be164e30 100644
--- a/config/hostapd.conf
+++ b/config/hostapd.conf
@@ -9,8 +9,8 @@ channel=1
 hw_mode=g
 wpa_passphrase=ChangeMe
 interface=wlan0
-wpa=1
-wpa_pairwise=TKIP
+wpa=2
+wpa_pairwise=CCMP
 country_code=
 ## Rapberry Pi 3 specific to on board WLAN/WiFi
 #ieee80211n=1 # 802.11n support (Raspberry Pi 3)
@@ -18,4 +18,5 @@ country_code=
 #ht_capab=[HT40][SHORT-GI-20][DSSS_CCK-40] # (Raspberry Pi 3)
 
 ## RaspAP wireless client AP mode
-#interface=uap0
\ No newline at end of file
+#interface=uap0
+
diff --git a/config/wireless.json b/config/wireless.json
new file mode 100644
index 00000000..f69d94f1
--- /dev/null
+++ b/config/wireless.json
@@ -0,0 +1,17 @@
+{"wireless_regdb": {
+    "debug": "off",
+    "2_4GHz_max11ch": {
+        "countries": [ "AG", "BS", "BB", "BZ", "CR", "CU", "DM", "DO", "SV", "GD", "GT",
+        "HT", "HN", "JM", "MX", "NI", "PA", "KN", "LC", "VC", "TT", "US", "CA", "UZ", "CO" ],
+        "channels": [ 1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11 ]
+    },
+    "2_4GHz_max14ch": { 
+        "countries": [ "JP" ],
+        "channels": [ 1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14 ]
+    },
+    "5Ghz_max48ch": {
+        "countries": [ "US" ],
+        "channels": [ 36, 40, 44, 48 ]
+    }
+}} 
+
diff --git a/includes/functions.php b/includes/functions.php
index 1c4c5150..d43c7b89 100755
--- a/includes/functions.php
+++ b/includes/functions.php
@@ -142,19 +142,22 @@ function isAssoc($arr)
 /**
 *
 * Display a selector field for a form. Arguments are:
-*   $name:     Field name
-*   $options:  Array of options
-*   $selected: Selected option (optional)
-*       If $options is an associative array this should be the key
-*
+* @param string $name: Field name
+* @param array $options: Array of options
+* @param string $selected: Selected option (optional)
+* @param string $id: $options is an associative array this should be the key
+* @param string $event: onChange event (optional)
+* @param string $disabled (optional)
 */
-function SelectorOptions($name, $options, $selected = null, $id = null)
+function SelectorOptions($name, $options, $selected = null, $id = null, $event = null, $disabled = null)
 {
     echo '<select class="form-control" name="'.htmlspecialchars($name, ENT_QUOTES).'"';
     if (isset($id)) {
         echo ' id="' . htmlspecialchars($id, ENT_QUOTES) .'"';
     }
-
+    if (isset($event)) {
+        echo ' onChange="' . htmlspecialchars($event, ENT_QUOTES).'()"';
+    }
     echo '>' , PHP_EOL;
     foreach ($options as $opt => $label) {
         $select = '';
@@ -162,8 +165,10 @@ function SelectorOptions($name, $options, $selected = null, $id = null)
         if ($key == $selected) {
             $select = ' selected="selected"';
         }
-
-        echo '<option value="'.htmlspecialchars($key, ENT_QUOTES).'"'.$select.'>'.
+        if ($key == $disabled) {
+            $disabled = ' disabled';
+        }
+        echo '<option value="'.htmlspecialchars($key, ENT_QUOTES).'"'.$select.$disabled.'>'.
             htmlspecialchars($label, ENT_QUOTES).'</option>' , PHP_EOL;
     }
 
diff --git a/includes/hostapd.php b/includes/hostapd.php
index 2db5733f..418286fb 100755
--- a/includes/hostapd.php
+++ b/includes/hostapd.php
@@ -15,8 +15,9 @@ function DisplayHostAPDConfig()
         'a' => '802.11a - 5 GHz',
         'b' => '802.11b - 2.4 GHz',
         'g' => '802.11g - 2.4 GHz',
-        'n' => '802.11n - 2.4 GHz'
-    ];
+        'n' => '802.11n - 2.4 GHz',
+        'ac' => '802.11.ac - 5 GHz'
+   ];
     $arrSecurity = array(1 => 'WPA', 2 => 'WPA2', 3 => 'WPA+WPA2', 'none' => _("None"));
     $arrEncType = array('TKIP' => 'TKIP', 'CCMP' => 'CCMP', 'TKIP CCMP' => 'TKIP+CCMP');
     $managedModeEnabled = false;
@@ -93,7 +94,7 @@ function SaveHostAPDConfig($wpa_array, $enc_types, $modes, $interfaces, $status)
         return false;
     }
 
-    if (intval($_POST['channel']) < 1 || intval($_POST['channel']) > 14) {
+    if (intval($_POST['channel']) < 1 || intval($_POST['channel']) > 48) {
         error_log("Attempting to set channel to '".$_POST['channel']."'");
         return false;
     }
@@ -180,6 +181,7 @@ function SaveHostAPDConfig($wpa_array, $enc_types, $modes, $interfaces, $status)
 
     if ($good_input) {
         // Fixed values
+        $country_code = $_POST['country_code'];
         $config = 'driver=nl80211'.PHP_EOL;
         $config.= 'ctrl_interface='.RASPI_HOSTAPD_CTRL_INTERFACE.PHP_EOL;
         $config.= 'ctrl_interface_group=0'.PHP_EOL;
@@ -193,6 +195,20 @@ function SaveHostAPDConfig($wpa_array, $enc_types, $modes, $interfaces, $status)
             $config.= 'ieee80211n=1'.PHP_EOL;
             // Enable basic Quality of service
             $config.= 'wmm_enabled=1'.PHP_EOL;
+        } elseif ($_POST['hw_mode'] === 'ac') {
+            $config.= 'hw_mode=a'.PHP_EOL.PHP_EOL;
+            $config.= '# N'.PHP_EOL;
+            $config.= 'ieee80211n=1'.PHP_EOL;
+            $config.= 'require_ht=1'.PHP_EOL;
+            $config.= 'ht_capab=[MAX-AMSDU-3839][HT40+][SHORT-GI-20][SHORT-GI-40][DSSS_CCK-40]'.PHP_EOL.PHP_EOL;
+            $config.= '# AC'.PHP_EOL;
+            $config.= 'ieee80211ac=1'.PHP_EOL;
+            $config.= 'require_vht=1'.PHP_EOL;
+            $config.= 'ieee80211d=0'.PHP_EOL;
+            $config.= 'ieee80211h=0'.PHP_EOL;
+            $config.= 'vht_capab=[MAX-AMSDU-3839][SHORT-GI-80]'.PHP_EOL;
+            $config.= 'vht_oper_chwidth=1'.PHP_EOL;
+            $config.= 'vht_oper_centr_freq_seg0_idx=42'.PHP_EOL.PHP_EOL;
         } else {
             $config.= 'hw_mode='.$_POST['hw_mode'].PHP_EOL;
             $config.= 'ieee80211n=0'.PHP_EOL;
diff --git a/templates/hostapd.php b/templates/hostapd.php
index fd1c9551..591b2f05 100755
--- a/templates/hostapd.php
+++ b/templates/hostapd.php
@@ -49,38 +49,32 @@
               <div class="form-group col-md-6">
                 <label for="cbxhwmode"><?php echo _("Wireless Mode") ;?></label>
                 <?php
+                $countries_5Ghz_max48ch = RASPI_5GHZ_ISO_ALPHA2;
                 $selectedHwMode = $arrConfig['hw_mode'];
                 if (isset($arrConfig['ieee80211n'])) {
                     if (strval($arrConfig['ieee80211n']) === '1') {
                         $selectedHwMode = 'n';
                     }
                 }
-
-                SelectorOptions('hw_mode', $arr80211Standard, $selectedHwMode, 'cbxhwmode'); ?>
+                if (isset($arrConfig['ieee80211ac'])) {
+                    if (strval($arrConfig['ieee80211ac']) === '1') {
+                        $selectedHwMode = 'ac';
+                    }
+                }
+                if (!in_array($arrConfig['country_code'], $countries_5Ghz_max48ch)) {
+                    $hwModeDisabled = 'ac';
+                    if ($selectedHwMode === $hwModeDisabled) {
+                        unset($selectedHwMode);
+                    }
+                }
+                SelectorOptions('hw_mode', $arr80211Standard, $selectedHwMode, 'cbxhwmode', 'loadChannelSelect', $hwModeDisabled); ?>
               </div>
             </div>
             <div class="row">
               <div class="form-group col-md-6">
                 <label for="cbxchannel"><?php echo _("Channel"); ?></label>
                 <?php
-                $selectablechannels = range(1, 13);
-                $countries_2_4Ghz_max11ch = array('AG', 'BS', 'BB', 'BZ', 'CR', 'CU', 'DM', 'DO', 'SV', 'GD', 'GT',
-                             'HT', 'HN', 'JM', 'MX', 'NI', 'PA', 'KN', 'LC', 'VC', 'TT',
-                             'US', 'CA', 'UZ', 'CO');
-                $countries_2_4Ghz_max14ch = array('JP');
-                if (in_array($arrConfig['country_code'], $countries_max11channels)) {
-                    // In North America till channel 11 is the maximum allowed wi-fi 2.4Ghz channel.
-                    // Except for the US that allows channel 12 & 13 in low power mode with additional restrictions.
-                    // Canada that allows channel 12 in low power mode. Because it's unsure if low powered mode
-                    // can be supported the channels are not selectable for those countries.
-                    // source: https://en.wikipedia.org/wiki/List_of_WLAN_channels#Interference_concerns
-                    // Also Uzbekistan and Colombia allow to select till channel 11 as maximum channel on the 2.4Ghz wi-fi band.
-                    $selectablechannels = range(1, 11);
-                } elseif (in_array($arrConfig['country_code'], $countries_2_4Ghz_max14ch)) {
-                    if ($arrConfig['hw_mode'] === 'b') {
-                        $selectablechannels = range(1, 14);
-                    }
-                }
+                $selectablechannels = Array();
                 SelectorOptions('channel', $selectablechannels, intval($arrConfig['channel']), 'cbxchannel'); ?>
               </div>
             </div>
@@ -180,7 +174,7 @@
               <div class="form-group col-md-6">
               <label for="cbxcountries"><?php echo _("Country Code"); ?></label>
               <input type="hidden" id="selected_country" value="<?php echo htmlspecialchars($arrConfig['country_code'], ENT_QUOTES); ?>">
-              <select  class="form-control" id="cbxcountries" name="country_code">
+              <select  class="form-control" id="cbxcountries" name="country_code" onchange="loadChannelSelect()">
                 <option value="AF">Afghanistan</option>
                 <option value="AX">Åland Islands</option>
                 <option value="AL">Albania</option>