diff --git a/src/services/NotificationService.ts b/src/services/NotificationService.ts
index ffa0937..40e0dab 100644
--- a/src/services/NotificationService.ts
+++ b/src/services/NotificationService.ts
@@ -67,16 +67,29 @@ export class NotificationService {
 
   private async sendEtaNotificationImmediately({ deviceId, shuttleId, stopId }: ScheduledNotificationData): Promise<boolean> {
     this.reloadAPNsTokenIfTimePassed();
-
-    // Construct the fetch request
+    const url = this.getAPNsFullUrlToUse(deviceId);
 
     // Send the fetch request
 
+
     // Check whether it was successful
     // Return the result
     return false;
   }
 
+  private getAPNsFullUrlToUse(deviceId: string) {
+    // Construct the fetch request
+    const devBaseUrl = "https://api.sandbox.push.apple.com"
+    const prodBaseUrl = "https://api.push.apple.com"
+    const path = "/3/device/" + deviceId;
+
+    let urlToUse = prodBaseUrl;
+    if (process.env.NODE_ENV !== "production") {
+      urlToUse = devBaseUrl + path;
+    }
+    return urlToUse;
+  }
+
   private async etaSubscriberCallback(eta: IEta) {
     const tuple = new TupleKey(eta.shuttleId, eta.stopId);
     // TODO: move device IDs object (with TupleKey based string) to its own class