Local Calling Guide

Area code/prefix search

Search area code/prefix (NPA/NXX)
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NPA: 227 [Rate centres in NPA 227] [Dial plan for NPA 227]

NXX: 997

NPA-NXX BLOCK Rate Centre Region Switch OCN LATA LIR Eff date Disc date
227-997 A Washington Zone 2 MD   6395 CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MD 236   2025-04-11   
227-997 0 Washington Zone 2 MD   6395 CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MD 236   2025-12-12   
227-997 1 Washington Zone 2 MD   6395 CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MD 236   2025-12-12   
227-997 2 Washington Zone 2 MD   4036 NEW CINGULAR WIRELESS PCS, LLC - DC 236   2026-02-26   
227-997 3 Washington Zone 2 MD   876D ONVOY, LLC - MD 236   2025-04-14   
227-997 4 Washington Zone 2 MD   4036 NEW CINGULAR WIRELESS PCS, LLC - DC 236   2026-03-02   
227-997 5 Washington Zone 2 MD   4036 NEW CINGULAR WIRELESS PCS, LLC - DC 236   2026-03-02   
227-997 6 Washington Zone 2 MD   4036 NEW CINGULAR WIRELESS PCS, LLC - DC 236   2026-03-02   
227-997 7 Washington Zone 2 MD   876D ONVOY, LLC - MD 236   2025-05-10   
227-997 8 Washington Zone 2 MD   876D ONVOY, LLC - MD 236   2025-05-10   
227-997 9 Washington Zone 2 MD   071F BANDWIDTH.COM CLEC, LLC - MD 236   2025-04-14   

Last updated: Thu, 29 Jan 2026 14:35:03 UTC

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