Thanks for providing "backup" to my contention, i.e. that I have been a Maryland resident since prehistoric times, and there never was, never is any "exchange" in the state that begins with "123". And, I also agree with you - that this is simply a group of con artists. See ya around the campfire !
Name Unavailable and the number comes up as 301-123-1686. 123? Seriously? there is no such exchange left no message obviously a computer generated number.