Local Calling Guide

Area code/prefix search

Search area code/prefix (NPA/NXX)
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NPA: 667 [Rate centres in NPA 667] [Dial plan for NPA 667]

NXX: 374

NPA-NXX BLOCK Rate Centre Region Switch OCN LATA LIR Eff date Disc date
667-374 A Waterloo MD BLTMMDCH45Z  071F BANDWIDTH.COM CLEC, LLC - MD 238      
667-374 0 Waterloo MD BLTMMDCH45Z  071F BANDWIDTH.COM CLEC, LLC - MD 238   2022-02-05   
667-374 1 Waterloo MD BLTMMDCH45Z  071F BANDWIDTH.COM CLEC, LLC - MD 238   2022-03-11   
667-374 2 Waterloo MD BLTMMDCH45Z  071F BANDWIDTH.COM CLEC, LLC - MD 238   2022-04-21   
667-374 3 Waterloo MD   876D ONVOY, LLC - MD 238   2025-02-01   
667-374 5 Waterloo MD   7325 TELEPORT COMMUNICATIONS AMERICA, LLC - MD 238   2025-02-07   
667-374 6 Waterloo MD BLTQMD01BMD  516J TON80 COMMUNICATIONS, LLC 238   2022-03-26   
667-374 7 Waterloo MD BLTMMDCH42Z  876D ONVOY, LLC - MD 238   2022-09-25   
667-374 8 Waterloo MD BLTMMDCHXUX  624H ONVOY SPECTRUM, LLC 238   2022-02-11   
667-374 9 Waterloo MD BLTMMDCHXUX  624H ONVOY SPECTRUM, LLC 238   2022-02-11   

Last updated: Wed, 18 Jun 2025 02:30:00 UTC

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