‭+1 (800) 673-****‬ Is this apple support

Apple does not make such calls.

All such calls are scams from criminals attempting to steal your personal and financial information. The callers will often use number spoofing to pretend they are calling from a legitimate business. The correct course of action is to hang up on them, repeatedly if needed. 

Avoid phishing emails, fake 'virus' alerts, phony support calls, and other scams - Apple Support

Yes. Apple does not make unsolicited phone calls. Also note that the number shown on most scam and telemarketing calls is spoofed and is not the number actually originating the call. If there was a problem with your account you would be notified when you attempt to log in, including when logging into this forum. Also see: Avoid phishing emails, fake 'virus' alerts, phony support calls, and other scams - Apple Support