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 +1,48 @@
+// @flow
+
+import * as React from 'react';
+
+import {
+  useGetVersion,
+  getVersionActionTypes,
+} from '../actions/device-actions.js';
+import { useDispatchActionPromise } from '../utils/action-utils.js';
+
+function useIsKeyserverURLValid(keyserverURL?: string): () => Promise<boolean> {
+  const serverCallParamOverride = React.useMemo(() => {
+    if (!keyserverURL) {
+      return undefined;
+    }
+
+    return {
+      keyserverInfos: {
+        [keyserverURL]: {
+          urlPrefix: keyserverURL,
+        },
+      },
+    };
+  }, [keyserverURL]);
+
+  const getVersionCall = useGetVersion(serverCallParamOverride);
+
+  const dispatchActionPromise = useDispatchActionPromise();
+
+  return React.useCallback(async () => {
+    if (!keyserverURL) {
+      return false;
+    }
+
+    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, keyserverURL]);
+}
+
+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
@@ -4,12 +4,9 @@
 import * as React from 'react';
 import { Text, View } from 'react-native';
 
-import {
-  useGetVersion,
-  getVersionActionTypes,
-} from 'lib/actions/device-actions.js';
+import { getVersionActionTypes } from 'lib/actions/device-actions.js';
 import { createLoadingStatusSelector } from 'lib/selectors/loading-selectors.js';
-import { 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';
@@ -107,34 +104,18 @@
     buttonState = 'loading';
   }
 
-  const serverCallParamOverride = React.useMemo(
-    () => ({
-      keyserverInfos: {
-        [keyserverURL]: {
-          urlPrefix: keyserverURL,
-        },
-      },
-    }),
-    [keyserverURL],
-  );
-  const getVersionCall = useGetVersion(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;
     }
@@ -148,12 +129,11 @@
       params: { userSelections: { coolOrNerdMode, keyserverURL } },
     });
   }, [
-    navigate,
-    coolOrNerdMode,
     keyserverURL,
+    isKeyserverURLValidPromiseCallback,
     setCachedSelections,
-    dispatchActionPromise,
-    getVersionCall,
+    navigate,
+    coolOrNerdMode,
   ]);
 
   const styles = useStyles(unboundStyles);