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 3 Washington Zone 2 MD   876D ONVOY, LLC - MD 236   2025-04-14   
227-997 4 Washington Zone 2 MD   732J NUSO, LLC 236   2025-08-10   
227-997 5 Washington Zone 2 MD   732J NUSO, LLC 236   2025-08-10   
227-997 6 Washington Zone 2 MD   732J NUSO, LLC 236   2025-08-10   
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, 16 Oct 2025 03:04:18 UTC

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