Who called from 3612176458

How is it possible for the same phone number to carry several different caller ID monikers?  They called late on a week day; caller ID said "UTD CAN SUP FD".  Previous calls (2) caller ID  showed one same as b4, & other caller ID said "HALLETTSVILL TX".  Seems phishy to me!

Call every day nothing but dead air

Nuisance repeat caller. Called last night 6:30PM and again just now at 10:35AM. No message left of course.  Number now blocked.

Dead air when I answer...

Called but did not leave a message.