ZoomGov Auth URL

We have a couple of OAuth apps in the marketplace, one for zoom and one for zoomPhone api integration. Some of our customers are gov customers and we've been using api.zoomgov.com for apis.

For authorizing those customers, we have used https://zoomgov.us/oauth/authorize?client_id=...&redirect...

It seems that zoomgov.us no longer resolves to a valid network address anymore. We tried to change to zoomgov.com/oauth... but got an "Invalid client_id" message.

Can you please confirm if zoomgov.us is valid or not and can you please point me to any documentation of this change?

Thanks