if you guys have had no trouble until recently, then bring it up. communication is a necessary tool in relationships. you'll never know if you don't ask.

i know my husband is forgetful. maybe the first time he called/messaged this number, it was the wrong number, and he had forgotten by the next time and just called to make sure it wasn't someone he knew that he'd deleted from his contact list. i have this happen to me sometimes.

just ask. it shouldn't hurt to ask if you haven't had any prior issues.