Local Calling Guide

Area code/prefix search

Search area code/prefix (NPA/NXX)
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NPA: 220 [Rate centres in NPA 220] [Dial plan for NPA 220]

NXX: 204

NPA-NXX BLOCK Rate Centre Region Switch OCN LATA LIR Eff date Disc date
220-204 A Baltimore OH HLRDOHEJGT0  6534 NEW CINGULAR WIRELESS PCS, LLC - IL 324      
220-204 0 Baltimore OH HLRDOHEJGT0  6534 NEW CINGULAR WIRELESS PCS, LLC - IL 324   2021-12-18   
220-204 1 Baltimore OH CLMBOHLT1MD  464C ONVOY, LLC - OH 324   2022-05-14   
220-204 2 Baltimore OH CLMBOHLT1MD  464C ONVOY, LLC - OH 324   2021-03-11   
220-204 3 Baltimore OH CLMBOHLT1MD  464C ONVOY, LLC - OH 324   2021-03-11   
220-204 4 Baltimore OH CLMBOHLT1MD  464C ONVOY, LLC - OH 324   2021-06-25   
220-204 5 Baltimore OH CLMBOHLT1MD  464C ONVOY, LLC - OH 324   2021-06-25   
220-204 6 Baltimore OH CLMBOH1143Z  624H ONVOY SPECTRUM, LLC 324   2024-07-25   
220-204 7 Baltimore OH HLRDOHEJGT0  6534 NEW CINGULAR WIRELESS PCS, LLC - IL 324   2024-08-30   
220-204 8 Baltimore OH HLRDOHEJGT0  6534 NEW CINGULAR WIRELESS PCS, LLC - IL 324   2021-05-27   
220-204 9 Baltimore OH HLRDOHEJGT0  6534 NEW CINGULAR WIRELESS PCS, LLC - IL 324   2021-01-23   

Last updated: Thu, 16 Oct 2025 03:04:18 UTC

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