Central Office Code (NXX) Assignment Guidelines (COCAG)
Document status: Active
Central Office Code (NXX) Assignment Guidelines (COCAG)
Document status: Active
Central Office Code (NXX) Assignment Guidelines (COCAG)
Document status: Active
Non-Geographic 5XX-NXX Code Assignment Guidelines
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Non-Geographic 5XX-NXX Code Assignment Guideliness
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Non-Geographic 5XX-NXX Code Assignment Guideliness
Document status: Active
Non-Geographic 5XX-NXX Code Assignment Guideliness
Document status: Active
Non-Geographic 5XX-NXX Code Assignment Guideliness
Document status: Active
Non-Geographic 5XX-NXX Code Assignment Guideliness
Document status: Active
Personal Communications Services (PCS) 5YY NXX Code Assignment guidelines
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