It is indeed illegal under federal law to spoof identity and caller number as it arrives in caller ID displays, but there is something called "selective enforcement"
It seems that in the past 35 years, we've succeeded in "get government off our backs" - with this result, along with salmonella burgers, poisoned pet food, etc., etc.
Thus criminal telemarketer intrusion into our homes is on the "non-selected for enforcement" list...
I received 2 calls from this number yesterday, 10-29-2013. This is obviously a bogus number - 626 is a valid area code for where I live. But 198-7659 is not a valid telephone number...
Based on that, I'm going to assume the caller is using Caller ID spoofing - therefore it's likely some kind of a scam. Why else would the caller use Caller ID spoofing??? And I'll go a step further and say it's likely a robo calling device - though saying that is pure speculation on my part...
If ever you connect with a live person, do not under any circumstances give them any personal information - period! No matter how hard they try to press for that - assume it's a scam and treat it accordingly...
Better yet, just don't answer the phone if you see a number like this, or a number you don't recognize...
And if you don't have Caller ID, then get it - it will pay for itself...