Local Calling Guide

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NPA: 410 [Rate centres in NPA 410] [Dial plan for NPA 410]

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NPA-NXX BLOCK Rate Centre Region Switch OCN LATA LIR Eff date Disc date
410-537 4 Baltimore MD BLTMMDWLDS0  9212 VERIZON MARYLAND, INC. 238      
410-537 5 Baltimore MD BLTMMDWLDS0  9212 VERIZON MARYLAND, INC. 238      
410-537 6 Baltimore MD BLTMMDWLDS0  9212 VERIZON MARYLAND, INC. 238      
410-537 7 Baltimore MD BLTMMDWLDS0  9212 VERIZON MARYLAND, INC. 238      
410-537 8 Baltimore MD BLTMMDWLDS0  9212 VERIZON MARYLAND, INC. 238      
410-537 9 Baltimore MD   829J PAETEC ITEL, LLC 238   2016-02-01   
410-538 A Fork MD EDWDMDEGDS0  9212 VERIZON MARYLAND, INC. 238      
410-538 0 Fork MD BLTQMD018MD  145J TERRA NOVA TELECOM INC. 238   2024-09-12   
410-538 1 Fork MD BLTMMDCH42Z  876D ONVOY, LLC - MD 238   2024-03-07   
410-538 2 Fork MD BLTMMDCH45Z  071F BANDWIDTH.COM CLEC, LLC - MD 238   2010-10-21   
410-538 3 Fork MD EDWDMDEGDS0  9212 VERIZON MARYLAND, INC. 238      
410-538 4 Fork MD EDWDMDEGDS0  9212 VERIZON MARYLAND, INC. 238      
410-538 5 Fork MD EDWDMDEGDS0  9212 VERIZON MARYLAND, INC. 238      
410-538 6 Fork MD EDWDMDEGDS0  9212 VERIZON MARYLAND, INC. 238      
410-538 7 Fork MD EDWDMDEGDS0  9212 VERIZON MARYLAND, INC. 238      
410-538 8 Fork MD EDWDMDEGDS0  9212 VERIZON MARYLAND, INC. 238      
410-538 9 Fork MD   145J TERRA NOVA TELECOM INC. 238   2026-01-04   
410-539 A Baltimore MD BLTMMDCHDS3  9212 VERIZON MARYLAND, INC. 238      
410-540 A Elkridge MD EKRGMDELDS0  9212 VERIZON MARYLAND, INC. 238      
410-541 A Severna Park MD SVPKMDSPRP0  9212 VERIZON MARYLAND, INC. 238      
410-541 0 Severna Park MD SVPKMDSPRP0  9212 VERIZON MARYLAND, INC. 238      
410-541 1 Severna Park MD BLTMMDCH42Z  876D ONVOY, LLC - MD 238   2016-03-03   
410-541 2 Severna Park MD SVPKMDSPRP0  9212 VERIZON MARYLAND, INC. 238      
410-541 3 Severna Park MD BLTMMDCH08Z  4492 VDL, INC. DBA GLOBAL TELECOM BROKERS - MD 238   2004-04-30   
410-541 4 Severna Park MD BLTMMDCH42Z  876D ONVOY, LLC - MD 238   2021-03-04   
410-541 5 Severna Park MD BLTMMDCH42Z  876D ONVOY, LLC - MD 238   2021-03-04   
410-541 6 Severna Park MD BLTMMDCH45Z  071F BANDWIDTH.COM CLEC, LLC - MD 238   2008-12-11   
410-541 7 Severna Park MD BLTMMDCH42Z  876D ONVOY, LLC - MD 238   2021-03-04   
410-541 8 Severna Park MD BLTMMDCH42Z  876D ONVOY, LLC - MD 238   2024-12-14   
410-541 9 Severna Park MD BLTMMDSNDS6  281E YMAX COMMUNICATIONS CORP. - MD 238   2009-02-12   
410-542 A Baltimore MD BLTMMDLBDS0  9212 VERIZON MARYLAND, INC. 238      
410-543 A Salisbury MD SLBRMDSBDS1  9212 VERIZON MARYLAND, INC. 242      
410-544 A Severna Park MD SVPKMDSPRP0  9212 VERIZON MARYLAND, INC. 238      
410-545 A Baltimore MD BLTMMDCHDS2  9212 VERIZON MARYLAND, INC. 238      
410-546 A Salisbury MD SLBRMDSBDS1  9212 VERIZON MARYLAND, INC. 242      
410-547 A Baltimore MD BLTMMDCHDS3  9212 VERIZON MARYLAND, INC. 238      
410-548 A Salisbury MD SLBRMDSBDS1  9212 VERIZON MARYLAND, INC. 242      
410-549 A Sykesville MD SYVLMDSKDS0  9212 VERIZON MARYLAND, INC. 238      
410-550 A Baltimore MD BLTMMDKMRS0  9212 VERIZON MARYLAND, INC. 238      
410-551 A Severn MD ODTNMDONDS0  9212 VERIZON MARYLAND, INC. 238      
410-552 A Sykesville MD SYVLMDSKDS0  9212 VERIZON MARYLAND, INC. 238      
410-552 0 Sykesville MD SYVLMDSKDS0  9212 VERIZON MARYLAND, INC. 238      
410-552 1 Sykesville MD SYVLMDSKDS0  9212 VERIZON MARYLAND, INC. 238      
410-552 2 Sykesville MD SYVLMDSKDS0  9212 VERIZON MARYLAND, INC. 238      
410-552 3 Sykesville MD SYVLMDSKDS0  9212 VERIZON MARYLAND, INC. 238      
410-552 4 Sykesville MD SYVLMDSKDS0  9212 VERIZON MARYLAND, INC. 238      
410-552 5 Sykesville MD SYVLMDSKDS0  9212 VERIZON MARYLAND, INC. 238      
410-552 6 Sykesville MD SYVLMDSKDS0  9212 VERIZON MARYLAND, INC. 238      
410-552 7 Sykesville MD   2593 CORE COMMUNICATIONS, INC.- MD 238   2019-04-30   
410-552 8 Sykesville MD BLTMMDCHXFX  318J COMCAST IP PHONE, LLC 238   2012-05-20   

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Last updated: Thu, 05 Feb 2026 23:41:55 UTC

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