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: RIDGMDRIRS0

NPA-NXX BLOCK Rate Centre Region OCN LATA LIR Eff date Disc date
301-872 A Ridge MD 9212 VERIZON MARYLAND, INC. 236      
301-872 0 Ridge MD 9212 VERIZON MARYLAND, INC. 236      
301-872 2 Ridge MD 9212 VERIZON MARYLAND, INC. 236      
301-872 4 Ridge MD 9212 VERIZON MARYLAND, INC. 236      
301-872 5 Ridge MD 9212 VERIZON MARYLAND, INC. 236      
301-872 8 Ridge MD 9212 VERIZON MARYLAND, INC. 236      
301-872 9 Ridge MD 9212 VERIZON MARYLAND, INC. 236      

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

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