Alex Balashov
2008-Sep-30 19:28 UTC
[asterisk-users] How to tell the underlying carrier for your ITSP.
FYI, for everyone party to the PSTN number discussion: You can generally tell which underlying carrier your DIDs belong to using an information source that aggregates both NANPA (www.nanpa.com) 10,000 block and Neustar pooling information (www.nationalpooling.com). Generally, localcallingguide.com is an excellent choice for this, although telcodata.us and others that people are fond of work well also. Sometimes the data isn't current, especially because blocks in pooling areas or areas with mandatory pooling change hands somewhat frequently. On LocalCallingGuide.com, if you go to Area Code/Prefix/OCN search and put in the NPA-NXX of your DID, you will get the code assignment or pooling assignments if the block is pooled, e.g. NPA-NXX-Y ... Carrier 1 NPA-NXX-Z ... Carrier 2 ... Pay attention to this pooling information. A lot of the carriers that nationwide DID providers use (XO, Global Crossing, Level3) have pooled blocks. The aggregate 10,000 block information is not going to apply to your specific DID in a great deal of MSAs. Of course, it is very possible that the number is ported, in which case figuring out the LRN and OCN/SPID of the carrier is much harder unless you are a carrier and have NPAC access. Contact me privately off-list if you are having problems with a DID and I might be able to help you determine the underlying carrier. -- Alex Balashov Evariste Systems Web : http://www.evaristesys.com/ Tel : (+1) (678) 954-0670 Direct : (+1) (678) 954-0671 Mobile : (+1) (706) 338-8599