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Non-Geographic 5XX-NXX Code Assignment Guideliness
Pages:
Publication date: 2020-03-01
Thousands-Block (NPA-NXX-X) & Central Office Code (NPA-NXX) Administration Guidelines (TBCOCAG)
Interoperability Standards between Next Generation Networks (NGN) for Signature-Based Handling of Asserted Information Using Tokens (SHAKEN)
Pages: 16
Publication date: 2019-10-01
Thousands-Block Number (NXX-X) Pooling Administration Guidelines (TBPAG)
Publication date: 2019-05-01
Central Office Code (NXX) Assignment Guidelines (COCAG)
9YY NXX Code Assignment Guidelines
Publication date: 2018-10-26
P-ANI Administration Guidelines
North American Numbering Plan Numbering Resource Utilization/Forecast Reporting (NRUF) Guidelines
Pages: 20
Thousands-Block Number (NXX-X) Pooling Administration Guidelines
NPA Code Relief Planning and Notification Guidelines
Pages: 48