Currently used by Norton/Symantic MFA for Account or Forum 2 factor Sign on. requires Ms says press #1 to continue, then gives 6 numbers twice. press some # I forgot, to repeat or hang up. Alternate means to software program or phone-app code generation. If you get a call you didn't request someone is trying to access account or mis-keyed on set-up for their MFA call and had to correct the typo.
Authentify is a legitimate caller. This call-back service is the second stage of many two-part verification schemes used by banks to confirm authenticity of online transactions. The message usually asks for entry of a code displayed on a computing device.
This number called me and woke me up out of my sleep at 2:08 am. The called ID said Authentify. What is that? Couldn't get back to sleep until after 4am.