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Forums » VOIP etc » Voice Over IP - VOIP » VOIP Tech Chat » How does craigslist know I am using a VoIP service????
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Links: ·ALL ·Review Your VoIP Provider ·VoIP Providers ·VoIP FAQ ·Porting Rules ·What Codec?
[Other] Freedigits quality degraded? »
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hwittenb

join:2003-12-20		reply to soitgoes2
Re: How does craigslist know I am using a VoIP service????

My T-Mobile prepaid says OK, GrandCentral voip and IPKall voip.

They probably lookup who owns the NPA NXX X number block in a database like www.localcallingguide.com. If it is Level3 or somone suspect they reject it.

to forum · permalink · · 2008-05-11 09:52:38 · Reply to this

druber

join:2000-04-11
Marlborough, MA		 My verizon landline number ported to voipo comes up as fixed too, so I think you may be right.
to forum · permalink · · 2008-05-11 09:57:29 · Reply to this

soitgoes2
Premium
join:2005-01-14
·Future Nine Corpor..

reply to hwittenb
said by hwittenb See Profile :

They probably lookup who owns the NPA NXX X number block in a database like
I would hope they look up more than that, but who knows.
I do know that current carrier info is contained in some databases. There was a while when the Nextel website would let you do an LNP check that gave the current carrier (not the carrier of the NPANXX block).
to forum · permalink · · 2008-05-11 09:58:05 · Reply to this

Elecconnec

join:2008-02-21
Littleton, CO
said by soitgoes2 See Profile :

said by hwittenb See Profile :

They probably lookup who owns the NPA NXX X number block in a database like
I would hope they look up more than that, but who knows.
I do know that current carrier info is contained in some databases. There was a while when the Nextel website would let you do an LNP check that gave the current carrier (not the carrier of the NPANXX block).
I just tried my cellphone number that I ported from a land line 3 years ago, and it came up "Fixed Line." I think the "ReduceFraud.com" guys are simply charging for NPA NXX lookups! (Nice work if you can get it!)
to forum · permalink · · 2008-05-16 18:07:50 · Reply to this
Forums » VOIP etc » Voice Over IP - VOIP » VOIP Tech Chat[Other] Freedigits quality degraded? »
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