Dec 6, 2014
There are many scammers in the 415 area code. Not all scammers use the 415 area code, of course, and many, many legitimate businesses use the 415 area code. However, this particular number is a number assigned by the YMAX Corporation, which is a fully-owned subsidiary of either magicJack or the company that owns magicJack.
MagicJacks can easily be purchased in India, for example, for a relatively small amount (usually $100 or less per unit) and then used anywhere in the world there is Internet service to call back into the US for free and to receive calls from the US for free. Most magicJacks are sold as part of an offer that includes 3 months, 6 months, or a full year of free phone service. I believe you can choose a number anywhere in the US that YMAX has numbers, including the 415 area code. That's the number you will see on the caller ID when you are called by someone using a magicJack to call you, and the number your phone has to dial to call them.
If you go past the free phone number offer period, you then have to pay to keep your service, which may mean identifying yourself using a credit card. Rather than do that, most scammers simply use part of the money they extort from people and buy a new magicJack.
Tracing a number to its source is quite difficult, because the magicJack connects your phone to the Internet and addresses all of its communication to magicJack servers. Your phone company receives its data directly from magicJack's servers, not from the caller. Thus, there is no traceable information you can receive on your phone or even over the Internet on a VoIP phone that identifies the source other than the caller ID you receive, and that's just an entry in the database of a switch somewhere.
There are more details involved than that, of course, but I think the summary above may help some individuals understand what is going on. What may be of more use is the following (probably complete) list of assignable magicJack numbers in the 415 area code. This list excludes any numbers that may have been ported into or out of the YMAX service:
http://www.localcallingguide.com/lca_prefix.p ... ys=0&nextdays=0
To use this list, the NPA-NXX combination in the table is the area code and exchange (i.e., the first six digits) of the telephone number. The "Block" is the seventh digit, as blocks are assigned in groups of 1000 phone numbers. (You can safely ignore the entry with block "A" as that has another meaning no necessarily relevant here.)
The upshot is that if you receive a call from a number that would be in any block listed here, the caller says he is from the IRS and has a south Asian accent, unless the IRS he is referring to is the Indian Revenue Service, you've picked up a call from a foreign extortionist.