Local Calling Guide

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

NXX: 688

NPA-NXX BLOCK Rate Centre Region Switch OCN LATA LIR Eff date Disc date
443-688 A Severn MD HNVAMDBHAMD  3910 CAVALIER TELEPHONE MID-ATLANTIC, LLC - MD 238      
443-688 0 Severn MD HNVAMDBHAMD  3910 CAVALIER TELEPHONE MID-ATLANTIC, LLC - MD 238      
443-688 1 Severn MD HNVAMDBHAMD  3910 CAVALIER TELEPHONE MID-ATLANTIC, LLC - MD 238      
443-688 2 Severn MD CLMAMDORGT0  4036 NEW CINGULAR WIRELESS PCS, LLC - DC 238   2020-05-15   
443-688 3 Severn MD CLMAMDORGT0  4036 NEW CINGULAR WIRELESS PCS, LLC - DC 238   2020-05-15   
443-688 4 Severn MD   145J TERRA NOVA TELECOM INC. 238   2024-02-15   
443-688 5 Severn MD HNVAMDBHAMD  3910 CAVALIER TELEPHONE MID-ATLANTIC, LLC - MD 238      
443-688 6 Severn MD BLTMMDCHXFX  318J COMCAST IP PHONE, LLC 238   2006-10-22   
443-688 7 Severn MD   2593 CORE COMMUNICATIONS, INC.- MD 238   2018-10-23   
443-688 8 Severn MD CLMAMDORGT0  4036 NEW CINGULAR WIRELESS PCS, LLC - DC 238   2020-05-15   
443-688 9 Severn MD BLTMMDCH42Z  876D ONVOY, LLC - MD 238   2021-03-04   

Last updated: Tue, 16 Apr 2024 01:38:01 UTC

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