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.

Gaithersburg, MD

<< 1 2 3 4 5 6 7

NPA-NXX BLOCK Switch OCN LATA LIR Eff date Disc date
301-944 8 WASHDCINDS0  7229 MCIMETRO ACCESS TRANSMISSION SERVICES LLC 236      
301-944 9 WASHDCINDS0  7229 MCIMETRO ACCESS TRANSMISSION SERVICES LLC 236      
301-947 A GTBGMDGBPS0  9212 VERIZON MARYLAND, INC. 236      
301-956 A GTBGMDGBPS0  9212 VERIZON MARYLAND, INC. 236      
301-956 0 BTVLMD18GT0  4036 NEW CINGULAR WIRELESS PCS, LLC - DC 236      
301-956 1 GTBGMDGBPS0  9212 VERIZON MARYLAND, INC. 236      
301-956 2 CHCHMDBE6MD  4716 PAETEC COMMUNICATIONS, INC. - MD 236      
301-956 3 WASKDCFNAMD  6395 CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MD 236      
301-956 4 WASKDCFNAMD  6395 CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MD 236      
301-956 5 WASKDCFNAMD  6395 CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MD 236      
301-956 6 WASKDCFNAMD  6395 CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MD 236      
301-956 7 WASLDCRGDS0  281E YMAX COMMUNICATIONS CORP. - MD 236      
301-956 8 WASLDCRGDS0  281E YMAX COMMUNICATIONS CORP. - MD 236      
301-956 9 WASKDCFNAMD  6395 CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MD 236      
301-963 A GTBGMDGBPS0  9212 VERIZON MARYLAND, INC. 236      
301-972 A GMTWMDGNDS0  9212 VERIZON MARYLAND, INC. 236      
301-972 0 GMTWMDGNDS0  9212 VERIZON MARYLAND, INC. 236      
301-972 1 GMTWMDGNDS0  9212 VERIZON MARYLAND, INC. 236      
301-972 2 GMTWMDGNDS0  9212 VERIZON MARYLAND, INC. 236      
301-972 3 GMTWMDGNDS0  9212 VERIZON MARYLAND, INC. 236      
301-972 4 GMTWMDGNDS0  9212 VERIZON MARYLAND, INC. 236      
301-972 5 GMTWMDGNDS0  9212 VERIZON MARYLAND, INC. 236      
301-972 6 GMTWMDGNDS0  9212 VERIZON MARYLAND, INC. 236      
301-972 7 PLVLMDPVRS2  9212 VERIZON MARYLAND, INC. 236      
301-972 8 PLVLMDPVRS2  9212 VERIZON MARYLAND, INC. 236      
301-972 9 GMTWMDGNDS0  9212 VERIZON MARYLAND, INC. 236      
301-977 A GTBGMDGBPS0  9212 VERIZON MARYLAND, INC. 236      
301-987 A GTBGMDGBPS0  9212 VERIZON MARYLAND, INC. 236      
301-990 A GTBGMDGBPS0  9212 VERIZON MARYLAND, INC. 236      

<< 1 2 3 4 5 6 7

Last updated: Wed, 20 Nov 2024 21:20:06 UTC

Sponsored by: FiberConX Communications Ltd.

Like this site? We accept donations via PayPal.