Called my phone but did not leave any message.

~ Central NY ~
  The 710 exchange is listed as a bogus prefix in the 720 area code.  The number is therefore "spoofed".  Do NOT answer calls from or interact with ANY callers from this fake "710" exchange in the 720 area code.  THEY - ARE - SCAMMERS.

I stand corrected. This prefix was just activated in the area code 720 this last September 9th.
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The callers from 720-710-0680 however seem to be telemarketers all the same.  Their Method of Operations (M.O.) is consistent.  There is however, a very slight possibility that this caller is legit (ha ha ha) and that each of us here are known by this caller, ... but not very likely at all.
   The cautions are still advisable.  Do not answer calls from unknown phone #'s.  Do NOT interact with strangers who call you and demand your information or $. They can tell you anything they want whether it's true or a lie.  Do not let yourself be pressured or coerced into becoming a victim.

Received one call 12-29. Didn't answer since phone warned me.

Cll from this number with no msg of course. We will block.