Local Calling Guide

Area code/prefix search

Search area code/prefix (NPA/NXX)
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NPA: 443 [Rate centres in NPA 443] [Dial plan for NPA 443]

NXX: 645

NPA-NXX BLOCK Rate Centre Region Switch OCN LATA LIR Eff date Disc date
443-645 A Millersville MD   829J PAETEC ITEL, LLC 238   2025-04-01   
443-645 0 Millersville MD   071F BANDWIDTH.COM CLEC, LLC - MD 238   2021-12-04   
443-645 1 Millersville MD   829J PAETEC ITEL, LLC 238      
443-645 2 Millersville MD   2593 CORE COMMUNICATIONS, INC.- MD 238   2019-03-29   
443-645 3 Millersville MD   318J COMCAST IP PHONE, LLC 238   2015-04-17   
443-645 4 Millersville MD   876D ONVOY, LLC - MD 238   2016-03-24   
443-645 5 Millersville MD   876D ONVOY, LLC - MD 238   2016-03-24   
443-645 6 Millersville MD   876D ONVOY, LLC - MD 238   2016-10-20   
443-645 7 Millersville MD   964H BARR TELL USA, INC. 238   2016-12-17   
443-645 8 Millersville MD   071F BANDWIDTH.COM CLEC, LLC - MD 238   2018-05-31   
443-645 9 Millersville MD   073H TELNYX LLC 238   2017-04-26   

Last updated: Thu, 29 Jan 2026 14:35:03 UTC

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