diff --git a/lib/shared/keyserver-utils.js b/lib/shared/keyserver-utils.js
new file mode 100644
--- /dev/null
+++ b/lib/shared/keyserver-utils.js
@@ -0,0 +1,41 @@
+// @flow
+
+import * as React from 'react';
+
+import {
+  getVersion,
+  getVersionActionTypes,
+} from '../actions/device-actions.js';
+import {
+  useServerCall,
+  useDispatchActionPromise,
+} from '../utils/action-utils.js';
+
+function useIsKeyserverURLValid(keyserverURL: string): () => Promise<boolean> {
+  const serverCallParamOverride = React.useMemo(
+    () => ({
+      urlPrefix: keyserverURL,
+    }),
+    [keyserverURL],
+  );
+
+  console.log(serverCallParamOverride);
+
+  const getVersionCall = useServerCall(getVersion, serverCallParamOverride);
+  const dispatchActionPromise = useDispatchActionPromise();
+
+  return React.useCallback(async () => {
+    const getVersionPromise = getVersionCall();
+    dispatchActionPromise(getVersionActionTypes, getVersionPromise);
+
+    // We don't care about the result; just need to make sure this doesn't throw
+    try {
+      await getVersionPromise;
+      return true;
+    } catch (e) {
+      return false;
+    }
+  }, [dispatchActionPromise, getVersionCall]);
+}
+
+export { useIsKeyserverURLValid };
diff --git a/native/account/registration/keyserver-selection.react.js b/native/account/registration/keyserver-selection.react.js
--- a/native/account/registration/keyserver-selection.react.js
+++ b/native/account/registration/keyserver-selection.react.js
@@ -4,15 +4,9 @@
 import * as React from 'react';
 import { Text, View } from 'react-native';
 
-import {
-  getVersion,
-  getVersionActionTypes,
-} from 'lib/actions/device-actions.js';
+import { getVersionActionTypes } from 'lib/actions/device-actions.js';
 import { createLoadingStatusSelector } from 'lib/selectors/loading-selectors.js';
-import {
-  useServerCall,
-  useDispatchActionPromise,
-} from 'lib/utils/action-utils.js';
+import { useIsKeyserverURLValid } from 'lib/shared/keyserver-utils.js';
 
 import RegistrationButtonContainer from './registration-button-container.react.js';
 import RegistrationButton from './registration-button.react.js';
@@ -97,7 +91,7 @@
     setError(undefined);
   }, []);
 
-  let keyserverURL;
+  let keyserverURL = '';
   if (currentSelection === 'ashoat') {
     keyserverURL = defaultURLPrefix;
   } else if (currentSelection === 'custom' && customKeyserver) {
@@ -110,30 +104,18 @@
     buttonState = 'loading';
   }
 
-  const serverCallParamOverride = React.useMemo(
-    () => ({
-      urlPrefix: keyserverURL,
-    }),
-    [keyserverURL],
-  );
-  const getVersionCall = useServerCall(getVersion, serverCallParamOverride);
+  const isKeyserverURLValidPromiseCallback =
+    useIsKeyserverURLValid(keyserverURL);
 
-  const dispatchActionPromise = useDispatchActionPromise();
   const { navigate } = props.navigation;
   const { coolOrNerdMode } = props.route.params.userSelections;
+
   const onSubmit = React.useCallback(async () => {
     setError(undefined);
-    if (!keyserverURL) {
-      return;
-    }
 
-    const getVersionPromise = getVersionCall();
-    dispatchActionPromise(getVersionActionTypes, getVersionPromise);
+    const isKeyserverURLValid = await isKeyserverURLValidPromiseCallback();
 
-    // We don't care about the result; just need to make sure this doesn't throw
-    try {
-      await getVersionPromise;
-    } catch {
+    if (!isKeyserverURLValid) {
       setError('cant_reach_keyserver');
       return;
     }
@@ -147,12 +129,11 @@
       params: { userSelections: { coolOrNerdMode, keyserverURL } },
     });
   }, [
-    navigate,
-    coolOrNerdMode,
     keyserverURL,
+    isKeyserverURLValidPromiseCallback,
     setCachedSelections,
-    dispatchActionPromise,
-    getVersionCall,
+    navigate,
+    coolOrNerdMode,
   ]);
 
   const styles = useStyles(unboundStyles);