diff --git a/imports/startup/both/index.js b/imports/startup/both/index.js
index 6e41c4c..1f8029b 100644
--- a/imports/startup/both/index.js
+++ b/imports/startup/both/index.js
@@ -5,7 +5,7 @@ import { rawAddressToB32Address, rawAddressToHexAddress, b32AddressToRawAddress
 export const SHOR_PER_QUANTA = 1000000000
 
 // Explorer Version
-export const EXPLORER_VERSION = '1.2.0'
+export const EXPLORER_VERSION = '1.2.1'
 
 // Function to cleanly represent large decimal numbers without exponential formatting.
 export function numberToString(num) {
diff --git a/imports/startup/server/index.js b/imports/startup/server/index.js
index 7d03edf..a95eaef 100644
--- a/imports/startup/server/index.js
+++ b/imports/startup/server/index.js
@@ -426,12 +426,18 @@ const getFullAddressState = (request, callback) => {
 const getAddressState = (request, callback) => {
   try {
     qrlApi('GetOptimizedAddressState', request, (error, response) => {
-      if (error) {
-        const myError = errorCallback(error, 'Cannot access API/GetOptimizedAddressState', '**ERROR/getAddressState** ')
+      if (error || response.state === null) {
+        const myError = errorCallback(
+          error,
+          'Cannot access API/GetOptimizedAddressState',
+          '**ERROR/getAddressState** ',
+        )
         callback(myError, null)
       } else {
         if (response.state.address) {
-          response.state.address = `Q${Buffer.from(response.state.address).toString('hex')}`
+          response.state.address = `Q${Buffer.from(
+            response.state.address,
+          ).toString('hex')}`
         }
 
         callback(null, response)
@@ -450,6 +456,15 @@ const getMultiSigAddressState = (request, callback) => {
         const myError = errorCallback(error, 'Cannot access API/GetMultiSigAddressState', '**ERROR/getMultiSigAddressState** ')
         callback(myError, null)
       } else {
+        if (response.state === null) {
+          const myError = errorCallback(
+            error,
+            'No state returned for this address',
+            '**ERROR/getMultiSigAddressState** ',
+          )
+          callback(myError, null)
+          return
+        }
         if (response.state.address) {
           response.state.address = `Q${Buffer.from(response.state.address).toString('hex')}`
         }
diff --git a/imports/ui/components/address/address.html b/imports/ui/components/address/address.html
index 2db3b76..710950f 100644
--- a/imports/ui/components/address/address.html
+++ b/imports/ui/components/address/address.html
@@ -1,5 +1,16 @@
 <template name="address">
-
+  {{#if notFound}}
+    <h3 class="ui pageHeader header">
+      <i class="tiny icon"></i>
+      <div class="content wordBreak">
+        {{address.parameter}}
+      </div>
+    </h3>
+    <div class="ui negative message">
+      State for <span class="hack">{{address.parameter}}</span> not found on this chain.<br>
+      Is this address from a different QRL network?
+    </div>
+  {{else}}
 <h3 class="ui pageHeader header">
   <i class="tiny icon"></i>
   <div class="content wordBreak f-h">
@@ -449,5 +460,5 @@ <h4>Slave addresses</h4>
     <div class="ui raised segment jsonbox json" style="display: none">{{json}}</div>
     
 </div>
-
+{{/if}}
 </template>
diff --git a/imports/ui/components/address/address.js b/imports/ui/components/address/address.js
index 422bacc..43625e3 100644
--- a/imports/ui/components/address/address.js
+++ b/imports/ui/components/address/address.js
@@ -120,7 +120,6 @@ function loadAddressTransactions(aId, page) {
   })
 }
 
-
 const getTokenBalances = (getAddress, callback) => {
   const request = {
     address: anyAddressToRaw(getAddress),
@@ -307,15 +306,23 @@ Template.address.helpers({
     return Session.equals('addressFormat', 'bech32')
   },
   address() {
-    const address = Session.get('address')
-    if (address !== undefined) {
-      if (address.state !== undefined) {
-        address.state.address = hexOrB32(anyAddressToRaw(address.state.address))
-        return address
+    try {
+      const address = Session.get('address')
+      if (Session.get('address').error) {
+        return { found: false, parameter: FlowRouter.getParam('aId') }
+      }
+      if (address !== undefined) {
+        if (address.state !== undefined) {
+          address.state.address = hexOrB32(
+            anyAddressToRaw(address.state.address),
+          )
+          return address
+        }
       }
+      return false
+    } catch (e) {
+      return false
     }
-    // error handling needed here
-    return false
   },
   isMultiSig() {
     try {
@@ -460,6 +467,16 @@ Template.address.helpers({
       return false
     }
   },
+  notFound() {
+    try {
+      if (Session.get('address').error) {
+        return true
+      }
+      return false
+    } catch (e) {
+      return false
+    }
+  },
   isThisAddress(address) {
     try {
       // console.log(address)
@@ -818,6 +835,6 @@ Template.address.onRendered(() => {
 
   // Render identicon (needs to be here for initial load).
   // Also Session.get('address') is blank at this point
-  //$('.qr-code-container').qrcode({ width: 100, height: 100, text: upperCaseFirst(FlowRouter.getParam('aId')) })
-  //jdenticon.update('#identicon', upperCaseFirst(FlowRouter.getParam('aId'))) /* eslint no-undef:0 */
+  // $('.qr-code-container').qrcode({ width: 100, height: 100, text: upperCaseFirst(FlowRouter.getParam('aId')) })
+  // jdenticon.update('#identicon', upperCaseFirst(FlowRouter.getParam('aId'))) /* eslint no-undef:0 */
 })