After investigating further Frosty's remark about numbers not starting with 1, I would have to conclude that Yes, the number itself was faked and so it is even more likely that this call was a scam.
I never ever answer a call from a number that is not listed in my Address Book. I let it ring and check my Voice Mail later. Most of the times whoever called didn't leave a message. If they did leave a message, I listen to it and decide if it's worth following through. Most of the time it's not, so I delete the number without a second thought.