Local Calling Guide

Area code/prefix search

Search area code/prefix (NPA/NXX)
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NPA: 410 [Rate centres in NPA 410] [Dial plan for NPA 410]

NXX: 557

NPA-NXX BLOCK Rate Centre Region Switch OCN LATA LIR Eff date Disc date
410-557 A Fork MD JRVLMDJERS0  9212 VERIZON MARYLAND, INC. 238      
410-557 0 Fork MD JRVLMDJERS0  9212 VERIZON MARYLAND, INC. 238      
410-557 1 Fork MD   829J PAETEC ITEL, LLC 238   2005-04-04   
410-557 2 Fork MD   2593 CORE COMMUNICATIONS, INC.- MD 238   2019-04-30   
410-557 3 Fork MD   2593 CORE COMMUNICATIONS, INC.- MD 238   2019-04-30   
410-557 4 Fork MD JRVLMDJERS0  9212 VERIZON MARYLAND, INC. 238      
410-557 5 Fork MD BLTMMDCH25Z  8697 BALTIMORE-WASHINGTON TELEPHONE (BWT) 238   2006-05-13   
410-557 6 Fork MD JRVLMDJERS0  9212 VERIZON MARYLAND, INC. 238      
410-557 7 Fork MD JRVLMDJERS0  9212 VERIZON MARYLAND, INC. 238      
410-557 8 Fork MD JRVLMDJERS0  9212 VERIZON MARYLAND, INC. 238      
410-557 9 Fork MD JRVLMDJERS0  9212 VERIZON MARYLAND, INC. 238      

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

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