diff --git a/service/src/main/java/org/whispersystems/textsecuregcm/registration/RegistrationServiceClient.java b/service/src/main/java/org/whispersystems/textsecuregcm/registration/RegistrationServiceClient.java
index 09c64b59a..b53e9cd8c 100644
--- a/service/src/main/java/org/whispersystems/textsecuregcm/registration/RegistrationServiceClient.java
+++ b/service/src/main/java/org/whispersystems/textsecuregcm/registration/RegistrationServiceClient.java
@@ -183,6 +183,8 @@ public class RegistrationServiceClient implements Managed {
                   RegistrationServiceSenderException.unknown(response.getError().getMayRetry()));
               case SEND_VERIFICATION_CODE_ERROR_TYPE_TRANSPORT_NOT_ALLOWED -> throw new CompletionException(
                   new TransportNotAllowedException(buildSessionResponseFromMetadata(response.getSessionMetadata())));
+              case SEND_VERIFICATION_CODE_ERROR_NO_SENDER_AVAILABLE -> throw new CompletionException(
+                  RegistrationServiceSenderException.unavailable(response.getError().getMayRetry()));
 
               default -> throw new CompletionException(
                   new RuntimeException("Failed to send verification code: " + response.getError().getErrorType()));
diff --git a/service/src/main/java/org/whispersystems/textsecuregcm/registration/RegistrationServiceSenderException.java b/service/src/main/java/org/whispersystems/textsecuregcm/registration/RegistrationServiceSenderException.java
index a2f9372ab..731b0701b 100644
--- a/service/src/main/java/org/whispersystems/textsecuregcm/registration/RegistrationServiceSenderException.java
+++ b/service/src/main/java/org/whispersystems/textsecuregcm/registration/RegistrationServiceSenderException.java
@@ -28,6 +28,10 @@ public class RegistrationServiceSenderException extends Exception {
     return new RegistrationServiceSenderException(Reason.PROVIDER_UNAVAILABLE, permanent);
   }
 
+  public static RegistrationServiceSenderException unavailable(final boolean permanent) {
+    return new RegistrationServiceSenderException(Reason.PROVIDER_UNAVAILABLE, permanent);
+  }
+
   private RegistrationServiceSenderException(final Reason reason, final boolean permanent) {
     super(null, null, true, false);
     this.reason = reason;
diff --git a/service/src/main/proto/RegistrationService.proto b/service/src/main/proto/RegistrationService.proto
index e1f9bc1f3..5c5643037 100644
--- a/service/src/main/proto/RegistrationService.proto
+++ b/service/src/main/proto/RegistrationService.proto
@@ -345,6 +345,11 @@ enum SendVerificationCodeErrorType {
    */
   SEND_VERIFICATION_CODE_ERROR_TYPE_SUSPECTED_FRAUD = 7;
 
+  /**
+   * No senders are available for the requested region/transport
+   */
+  SEND_VERIFICATION_CODE_ERROR_NO_SENDER_AVAILABLE = 8;
+
 }
 
 message CheckVerificationCodeRequest {