Rattle wrote:
] An online database of what switches control what NPAs. Useful
] if you want to see what company any given number block is
] assigned to. For instance, if you have a number xxx-yyy-zzzz,
] you can lookup the xxx-yyy portion and see who its assigned
] to. Due to number portability, this isn't an authoritative
] way to tell who is currently using a given number, but it
] might yield a clue about where it started.

More importantly, it will indicate what switch/central office is originating the line associated with that number and give you the address and CLLI of that CO. You can then do things like find out what type of switch you're on (for in band features like call waiting, caller id, etc), find out how far you are from the CO (for DSL or other digital services), and find out what dumpsters to dive.

RE: BellMind.net Phreakery Tools