[VoiceOps] Conferencing NPAs
abalashov at evaristesys.com
Wed Dec 9 13:54:53 EST 2009
Paul Timmins wrote:
> Michigan has mandatory thousands block pooling, and active LNP in most
> of those exchanges. I'm sure many of these other states are the same.
> Blocking this is a really dangerous thing to do, even if you don't care
> that the FCC would take a dim view. 906-204 for example has cingular
> cell phones in it.
I was about to say, Ujjval: if you're going to block things, at least
take care to block them at the NPA-NXX-Y pooled level. 90% of the
markets in the country are pooled; NPA-NXX is no longer a useful way
to determine which carrier a call is being routed to, and has not been
for a long time. As Paul says, in MI there may be little to no
correlation between NPA-NXX and what you (or L3) are/is seeking to block.
LNP dips are ideal, but 7-digit prefixes will still get you get
somewhere; NPA-NXX will not.
Alex Balashov - Principal
Web : http://www.evaristesys.com/
Tel : (+1) (678) 954-0670
Direct : (+1) (678) 954-0671
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