The number on my caller id was117207534536-that's too many numbers.And caller id said "invalid number".So I didn't pick up because I thought it may be the annoying " IRS guy" calling for a hundredth time.
Call from 720-753-4536 on May 9, 2017 at 7:56pm EST (in Florida). Caller ID read: Fort Lupton, CO. Didn't answer as our phone # is unlisted. No message left. Most likely spam/scam. Blocked.