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: 253

NPA-NXX BLOCK Rate Centre Region Switch OCN LATA LIR Eff date Disc date
227-253 A Frederick MD CMLDMDCMEMD  876D ONVOY, LLC - MD 240   2024-11-17   
227-253 0 Frederick MD   876D ONVOY, LLC - MD 240   2024-11-17   
227-253 1 Frederick MD   732J NUSO, LLC 240   2024-11-18   
227-253 2 Frederick MD   732J NUSO, LLC 240   2024-11-18   
227-253 3 Frederick MD   732J NUSO, LLC 240   2024-11-18   
227-253 4 Frederick MD   876D ONVOY, LLC - MD 240   2024-11-18   
227-253 5 Frederick MD   4036 NEW CINGULAR WIRELESS PCS, LLC - DC 240   2024-11-21   
227-253 6 Frederick MD   6395 CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MD 240   2024-12-23   
227-253 7 Frederick MD   6395 CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MD 240   2024-12-23   
227-253 8 Frederick MD   073H TELNYX LLC 240   2024-11-18   
227-253 9 Frederick MD   073H TELNYX LLC 240   2024-11-18   

Last updated: Tue, 13 Jan 2026 21:50:02 UTC

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