Local Calling Guide

Area code/prefix search

Search area code/prefix (NPA/NXX)
  • Effective date searches are available only for US area codes. Our sources for non-US NPA-NXX data do not provide this information.
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Switch: SLSPMDCVDS0

Remotes:

Switch Switch name Switch type
FALDMDFLRS0  FAIRLAND  ORM 
NPA-NXX BLOCK Rate Centre Region OCN LATA LIR Eff date Disc date
301-236 A Washington Zone 12 MD 9212 VERIZON MARYLAND, INC. 236      
301-384 A Washington Zone 12 MD 9212 VERIZON MARYLAND, INC. 236      
301-388 A Washington Zone 12 MD 9212 VERIZON MARYLAND, INC. 236      
301-388 0 Washington Zone 12 MD 9212 VERIZON MARYLAND, INC. 236      
301-388 1 Washington Zone 12 MD 9212 VERIZON MARYLAND, INC. 236      
301-388 2 Washington Zone 12 MD 9212 VERIZON MARYLAND, INC. 236      
301-388 3 Washington Zone 12 MD 9212 VERIZON MARYLAND, INC. 236      
301-388 4 Washington Zone 12 MD 9212 VERIZON MARYLAND, INC. 236      
301-388 9 Washington Zone 12 MD 9212 VERIZON MARYLAND, INC. 236      
301-421 A Ashton MD 9212 VERIZON MARYLAND, INC. 236      
301-476 A Ashton MD 9212 VERIZON MARYLAND, INC. 236      
301-476 2 Ashton MD 9212 VERIZON MARYLAND, INC. 236      
301-476 7 Ashton MD 9212 VERIZON MARYLAND, INC. 236      
301-476 8 Ashton MD 9212 VERIZON MARYLAND, INC. 236      
301-476 9 Ashton MD 9212 VERIZON MARYLAND, INC. 236      
301-622 A Washington Zone 3 MD 9212 VERIZON MARYLAND, INC. 236      
301-625 A Washington Zone 3 MD 9212 VERIZON MARYLAND, INC. 236      
301-680 A Washington Zone 3 MD 9212 VERIZON MARYLAND, INC. 236      
301-879 A Washington Zone 12 MD 9212 VERIZON MARYLAND, INC. 236      
301-989 A Washington Zone 12 MD 9212 VERIZON MARYLAND, INC. 236      

Last updated: Thu, 20 Nov 2025 13:34:34 UTC

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