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: 271

NPA-NXX BLOCK Rate Centre Region Switch OCN LATA LIR Eff date Disc date
227-271 A Washington Zone 10 MD   4036 NEW CINGULAR WIRELESS PCS, LLC - DC 236   2025-03-13   
227-271 8 Washington Zone 10 MD   4036 NEW CINGULAR WIRELESS PCS, LLC - DC 236   2025-03-13   
227-271 9 Washington Zone 10 MD   4036 NEW CINGULAR WIRELESS PCS, LLC - DC 236   2025-03-13   

Last updated: Sun, 26 Jan 2025 15:59:20 UTC

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