On 08/25/2015 04:22 PM, Alex Balashov wrote:
That's exactly right. There's no way to clean up a list "by" NPA-NXX.
You need to know where the call is going to go, which cannot be
determined from the number itself[1]. So, you still need to do an LNP
lookup to know which prefix the number is "genuinely' affiliated with.
[1] Except for nonportable blocks/areas.
As I explain to my customers, you can absolutely use my data to do the
initial scrub. LNP dips tend to cost money per dip, so taking the
obvious cell phone blocks out first saves you time and money. But you
MUST do the next step and scrub them after dipping too.
-Paul
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