If you change your sub-domain, there is a chance that you might get duplicate subscribers. As a result of this, whenever you send a notification, users start receiving it multiple times.

This increases the probability of users getting unsubscribed from receiving notifications.

So, the sub-domain is a fixed entity.

Also, read:
5 Reasons Why Your Business Needs Push Notifications
Will integrating Truepush impact my page load time?

Follow our Social Media pages.

Review us on TrustRadius.

Website: www.truepush.com
Email: help@truepush.com