Outbound CID is using wrong number

I have one phone that is set to use outbound CID 720xxxxxxx. When calling out it comes up as a 303 number. I have logged directly into the phone and the Global Settings and Line 1 CID is set to the 720 number. Is there any where else that could be overwriting these settings?

Lots of other places.

The SIP extension definition has one.
The Outbound Route has one.
The Trunk has one.

Some phones also implement a “local” Caller ID setting in hardware.

Any of them could be doing this.

The Outbound Route had overwrite ext checked. Thank you very much