I've received two text messages from 917.731.1551 saying its Republic B&T and asking me to call 314.442.0493. I haven't called though, because I don't bank with them. I'm guessing it's spam.
It is a scam. Do not return the call. Spoke with Republic Bank & Trust directly and if you did call that number and give any information, you will need to speak with the security department at Republic.