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Joined: Dec 2007
Posts: 6,800 Likes: 18
Retired Admin
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Retired Admin
Joined: Dec 2007
Posts: 6,800 Likes: 18 |
The first 2 numbers are a Prefix. The CSNA is the Service Code and Modifier.
If the next sequence is more than 3 digits that is a serial number
OR if it is 3 digits...that is the NPA followed by /NXX/LINE If, I remember correctly.
It is possible the CS means Digital Cross System and NA is the Modifier.
HOWEVER... ¯\_(ツ)_/¯
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