diff --git a/lib/utils/config.js b/lib/utils/config.js
--- a/lib/utils/config.js
+++ b/lib/utils/config.js
@@ -26,6 +26,7 @@
   +setSessionIDOnRequest: boolean,
   +calendarRangeInactivityLimit: ?number,
   +platformDetails: PlatformDetails,
+  +authoritativeKeyserverID: string,
 };
 
 let registeredConfig: ?Config = null;
diff --git a/native/config.js b/native/config.js
--- a/native/config.js
+++ b/native/config.js
@@ -3,8 +3,10 @@
 import { Platform } from 'react-native';
 
 import { registerConfig } from 'lib/utils/config.js';
+import { ashoatKeyserverID } from 'lib/utils/validation-utils.js';
 
 import { resolveKeyserverSessionInvalidationUsingNativeCredentials } from './account/legacy-recover-keyserver-session.js';
+import { authoritativeKeyserverID } from './facts/authoritativeKeyserverID.json';
 import { persistConfig, codeVersion } from './redux/persist.js';
 
 registerConfig({
@@ -16,4 +18,5 @@
     codeVersion,
     stateVersion: persistConfig.version,
   },
+  authoritativeKeyserverID: authoritativeKeyserverID ?? ashoatKeyserverID,
 });
diff --git a/web/app.react.js b/web/app.react.js
--- a/web/app.react.js
+++ b/web/app.react.js
@@ -34,6 +34,7 @@
 import { getConfig, registerConfig } from 'lib/utils/config.js';
 import { useDispatch } from 'lib/utils/redux-utils.js';
 import { infoFromURL } from 'lib/utils/url-utils.js';
+import { ashoatKeyserverID } from 'lib/utils/validation-utils.js';
 import { AlchemyENSCacheProvider, wagmiConfig } from 'lib/utils/wagmi-utils.js';
 
 import QrCodeLogin from './account/qr-code-login.react.js';
@@ -102,6 +103,8 @@
     stateVersion: persistConfig.version,
     ...desktopDetails,
   },
+  authoritativeKeyserverID:
+    process.env.AUTHORITATIVE_KEYSERVER_ID ?? ashoatKeyserverID,
 });
 
 const versionBroadcast = new BroadcastChannel('comm_version');
diff --git a/web/webpack.config.cjs b/web/webpack.config.cjs
--- a/web/webpack.config.cjs
+++ b/web/webpack.config.cjs
@@ -13,7 +13,7 @@
 
 async function getConfig(configName) {
   const { getCommConfig } = await import(
-    '../keyserver/dist/lib/utils/comm-config.js'
+    'keyserver/dist/lib/utils/comm-config.js'
   );
   return await getCommConfig(configName);
 }
@@ -194,7 +194,18 @@
   const identitySocketAddr = JSON.stringify(
     identityServiceConfig?.identitySocketAddr,
   );
-  const envVars = { IDENTITY_SOCKET_ADDR: identitySocketAddr };
+  const authoritativeKeyserverIDConfig = await getConfig({
+    folder: 'facts',
+    name: 'authoritativeKeyserverID',
+  });
+  const authoritativeKeyserverID = JSON.stringify(
+    authoritativeKeyserverIDConfig?.authoritativeKeyserverID,
+  );
+
+  const envVars = {
+    IDENTITY_SOCKET_ADDR: identitySocketAddr,
+    AUTHORITATIVE_KEYSERVER_ID: authoritativeKeyserverID,
+  };
   const browserConfigPromise = env.prod
     ? createProdBrowserConfig(baseProdBrowserConfig, babelConfig, envVars)
     : createDevBrowserConfig(baseDevBrowserConfig, babelConfig, envVars);