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This number is a valid Bank of America fraud department line, *but remember that any caller can spoof their number.*
After a BoA card application I received a voicemail from this number - notably it mentioned an application reference number that matched the legit reference number I got when I applied. Out of an abundance of caution I called a credit card customer support number on the BoA website, and after getting transferred a couple times they told me to call this number!
So it's legit. But if you receive a call, always safer to hang up and call them back, since callers can spoof their number, but when *you* call a legit number, you're good.
(I posted this to whocallsme.com, crossposting here)