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: LARLMDLRDS0

NPA-NXX BLOCK Rate Centre Region OCN LATA LIR Eff date Disc date
240-228 A Washington Zone 13 MD 9212 VERIZON MARYLAND, INC. 236      
240-456 A Laurel MD 9212 VERIZON MARYLAND, INC. 236      
240-568 A Laurel MD 9212 VERIZON MARYLAND, INC. 236      
240-592 A Washington Zone 13 MD 9212 VERIZON MARYLAND, INC. 236      
301-206 A Washington Zone 13 MD 9212 VERIZON MARYLAND, INC. 236      
301-317 A Laurel MD 9212 VERIZON MARYLAND, INC. 236      
301-362 A Laurel MD 9212 VERIZON MARYLAND, INC. 236      
301-369 A Washington Zone 13 MD 9212 VERIZON MARYLAND, INC. 236      
301-376 A Laurel MD 9212 VERIZON MARYLAND, INC. 236      
301-470 A Washington Zone 14 MD 9212 VERIZON MARYLAND, INC. 236      
301-483 A Laurel MD 9212 VERIZON MARYLAND, INC. 236      
301-490 A Laurel MD 9212 VERIZON MARYLAND, INC. 236      
301-497 A Laurel MD 9212 VERIZON MARYLAND, INC. 236      
301-498 A Laurel MD 9212 VERIZON MARYLAND, INC. 236      
301-549 A Ashton MD 9212 VERIZON MARYLAND, INC. 236      
301-604 A Laurel MD 9212 VERIZON MARYLAND, INC. 236      
301-617 A Laurel MD 9212 VERIZON MARYLAND, INC. 236      
301-725 A Laurel MD 9212 VERIZON MARYLAND, INC. 236      
301-776 A Laurel MD 9212 VERIZON MARYLAND, INC. 236      
301-939 A Washington Zone 13 MD 9212 VERIZON MARYLAND, INC. 236      
301-953 A Washington Zone 13 MD 9212 VERIZON MARYLAND, INC. 236      
410-264 A Waterloo (Washington DC LATA) MD 9212 VERIZON MARYLAND, INC. 236      
410-724 A Waterloo (Washington DC LATA) MD 9212 VERIZON MARYLAND, INC. 236      
410-792 A Waterloo (Washington DC LATA) MD 9212 VERIZON MARYLAND, INC. 236      
410-797 A Waterloo (Washington DC LATA) MD 9212 VERIZON MARYLAND, INC. 236      
410-880 A Waterloo (Washington DC LATA) MD 9212 VERIZON MARYLAND, INC. 236      
410-888 A Waterloo (Washington DC LATA) MD 9212 VERIZON MARYLAND, INC. 236      
443-778 A Waterloo (Washington DC LATA) MD 9212 VERIZON MARYLAND, INC. 236      

Last updated: Thu, 01 Jan 2026 03:59:49 UTC

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