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: 342

NPA-NXX BLOCK Rate Centre Region Switch OCN LATA LIR Eff date Disc date
667-342 A Preston MD SLBRMDSBXVX  876D ONVOY, LLC - MD 242      
667-342 0 Preston MD   624H ONVOY SPECTRUM, LLC 242   2023-09-02   
667-342 2 Preston MD   876D ONVOY, LLC - MD 242   2021-10-31   
667-342 3 Preston MD   876D ONVOY, LLC - MD 242   2021-12-20   
667-342 4 Preston MD   318J COMCAST IP PHONE, LLC 242   2022-07-05   
667-342 5 Preston MD   876D ONVOY, LLC - MD 242   2022-12-03   
667-342 6 Preston MD   516J TON80 COMMUNICATIONS, LLC 242   2022-03-21   
667-342 7 Preston MD   6119 LEVEL 3 COMMUNICATIONS, LLC - MD 242   2022-11-18   
667-342 8 Preston MD   876D ONVOY, LLC - MD 242   2022-12-24   
667-342 9 Preston MD   876D ONVOY, LLC - MD 242   2023-06-17   

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

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