Relation between OCN, LATA, NPA and NXX

genuaislam
Joined: Thu 12 of Mar, 2015

Relation between OCN, LATA, NPA and NXX

Posted:Thu 12 of Mar, 2015 (23:12 UTC)
I need some organize document to study on OCN, LATA, NPA and NXX. If someone knows please help me by providing some documents.

Thanks
Aminul