[asterisk-users] Country numbering plan resources

[Alex Balashov]

One of the problems you'll run into is that in larger countries like the 
US, and/or countries with greater amounts of telecom interconnection, 
competition and deregulation, this information cannot be reduced simply 
to a convenient algorithm.

The North American Numbering Plan (www.nanpa.com) does provide some 
basic standards for valid numbers, but aside from that, there exists no 
special numerological distinction between incumbent and competitive, 
fixed-line and mobile, or VoIP, and extensive number portability throws 
even more complexity into the mix.

I'm not saying it can't be done - just be aware that the undertaking 
you're proposing is very complicated, and the information would come 
from innumerable data sources (a great deal of them commercial and 
expensive) and a bewilderingly overlapping array of standards bodies.

For instance, something like this:

> NZ Cellular:
> area code 21 and 29 followed by 6, 7 or 8 digits - Vodafone GSM
> area code 27 followed by 6 or 7 digits - NZ Telecom CDMA
> note that there is number portability so the above is a guide.

... sounds like a laughably, impossibly simplistic formula to a North 
American reader.  And I can't imagine the situation in many other 
countries is much simpler.


-- 
Alex Balashov
Evariste Systems
Web    : http://www.evaristesys.com/
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