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Central office codes
French:
Indicatif de central
Used for:
Central office numbers
Central office numerals
Central office prefixes
CO prefixes
End office codes
Exchange codes
NNX
NNX codes
NNX numbers
NXX
NXX codes
NXX numbers
Related Term:
Central offices
Telephone numbers
Source:
FAC: "Local Competition"; GLOR; VOC; NEW
Subject Category:
PHON Telephone: technology and services