I know of no way that RingCentral, as a service, can do that. Essentially that would be spoofing the number. Then when the person might want to call you back on that"local number" they wouldn't be able to connect. The only way I can imagine that this could be done would be to purchase a local number for that location from RingCentral. Unfortunately if you are thinking more global than that (i.e., calling to anywhere in the U.S.) that approach wouldn't work.