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.
  • If you want to search an entire area code regardless of activity, leave both the next and past days fields set to zero.

NPA: 301 [Rate centres in NPA 301] [Dial plan for NPA 301]

NXX: 872

NPA-NXX BLOCK Rate Centre Region Switch OCN LATA LIR Eff date Disc date
301-872 A Ridge MD RIDGMDRIRS0  9212 VERIZON MARYLAND, INC. 236      
301-872 0 Ridge MD RIDGMDRIRS0  9212 VERIZON MARYLAND, INC. 236      
301-872 1 Ridge MD WASHDC127MD  073H TELNYX LLC 236   2023-06-18   
301-872 2 Ridge MD RIDGMDRIRS0  9212 VERIZON MARYLAND, INC. 236      
301-872 3 Ridge MD VINNVACBDS0  876D ONVOY, LLC - MD 236   2023-06-17   
301-872 4 Ridge MD RIDGMDRIRS0  9212 VERIZON MARYLAND, INC. 236      
301-872 5 Ridge MD RIDGMDRIRS0  9212 VERIZON MARYLAND, INC. 236      
301-872 6 Ridge MD   073H TELNYX LLC 236   2024-02-04   
301-872 7 Ridge MD   073H TELNYX LLC 236   2024-02-04   
301-872 8 Ridge MD RIDGMDRIRS0  9212 VERIZON MARYLAND, INC. 236      
301-872 9 Ridge MD RIDGMDRIRS0  9212 VERIZON MARYLAND, INC. 236      

Last updated: Tue, 16 Apr 2024 01:38:01 UTC

Sponsored by: ISP Telecom

Like this site? We accept donations via PayPal.