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.

Switch: GTBGMDGBPS0

Remotes:

Switch Switch name Switch type
CHCHMDBERP0  CHEVY CHASE  RP 
DMSCMDDERP0    RP 

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NPA-NXX BLOCK Rate Centre Region OCN LATA LIR Eff date Disc date
240-276 A Washington Zone 10 MD 9212 VERIZON MARYLAND, INC. 236      
240-276 0 Washington Zone 10 MD 9212 VERIZON MARYLAND, INC. 236   2004-06-25   
240-276 1 Washington Zone 10 MD 9212 VERIZON MARYLAND, INC. 236   2004-06-25   
240-276 2 Washington Zone 10 MD 9212 VERIZON MARYLAND, INC. 236   2004-06-25   
240-276 3 Washington Zone 10 MD 9212 VERIZON MARYLAND, INC. 236   2004-06-25   
240-276 4 Washington Zone 10 MD 9212 VERIZON MARYLAND, INC. 236   2004-06-25   
240-276 5 Washington Zone 10 MD 9212 VERIZON MARYLAND, INC. 236   2004-06-25   
240-386 A Washington Zone 10 MD 9212 VERIZON MARYLAND, INC. 236      
240-386 2 Washington Zone 10 MD 9212 VERIZON MARYLAND, INC. 236      
240-386 3 Washington Zone 10 MD 9212 VERIZON MARYLAND, INC. 236      
240-386 4 Washington Zone 10 MD 9212 VERIZON MARYLAND, INC. 236      
240-386 5 Washington Zone 10 MD 9212 VERIZON MARYLAND, INC. 236      
240-386 6 Washington Zone 10 MD 9212 VERIZON MARYLAND, INC. 236      
240-631 A Gaithersburg MD 9212 VERIZON MARYLAND, INC. 236      
240-632 A Gaithersburg MD 9212 VERIZON MARYLAND, INC. 236      
240-683 A Gaithersburg MD 9212 VERIZON MARYLAND, INC. 236      
301-208 A Gaithersburg MD 9212 VERIZON MARYLAND, INC. 236      
301-212 A Washington Zone 10 MD 9212 VERIZON MARYLAND, INC. 236      
301-212 1 Washington Zone 10 MD 9212 VERIZON MARYLAND, INC. 236      
301-212 2 Washington Zone 10 MD 9212 VERIZON MARYLAND, INC. 236      
301-212 3 Washington Zone 10 MD 9212 VERIZON MARYLAND, INC. 236      
301-212 4 Washington Zone 10 MD 9212 VERIZON MARYLAND, INC. 236      
301-212 5 Washington Zone 10 MD 9212 VERIZON MARYLAND, INC. 236      
301-212 6 Washington Zone 10 MD 9212 VERIZON MARYLAND, INC. 236      
301-212 7 Washington Zone 10 MD 9212 VERIZON MARYLAND, INC. 236      
301-212 8 Washington Zone 10 MD 9212 VERIZON MARYLAND, INC. 236      
301-212 9 Washington Zone 10 MD 9212 VERIZON MARYLAND, INC. 236      
301-216 A Gaithersburg MD 9212 VERIZON MARYLAND, INC. 236      
301-240 A Washington Zone 10 MD 9212 VERIZON MARYLAND, INC. 236      
301-240 0 Washington Zone 10 MD 9212 VERIZON MARYLAND, INC. 236      
301-240 1 Washington Zone 10 MD 9212 VERIZON MARYLAND, INC. 236      
301-240 2 Washington Zone 10 MD 9212 VERIZON MARYLAND, INC. 236      
301-240 4 Washington Zone 10 MD 9212 VERIZON MARYLAND, INC. 236      
301-240 5 Washington Zone 10 MD 9212 VERIZON MARYLAND, INC. 236      
301-240 6 Washington Zone 10 MD 9212 VERIZON MARYLAND, INC. 236      
301-240 7 Washington Zone 10 MD 9212 VERIZON MARYLAND, INC. 236      
301-240 8 Washington Zone 10 MD 9212 VERIZON MARYLAND, INC. 236      
301-240 9 Washington Zone 10 MD 9212 VERIZON MARYLAND, INC. 236      
301-258 A Washington Zone 10 MD 9212 VERIZON MARYLAND, INC. 236      
301-330 A Gaithersburg MD 9212 VERIZON MARYLAND, INC. 236      
301-355 A Gaithersburg MD 9212 VERIZON MARYLAND, INC. 236      
301-355 5 Gaithersburg MD 9212 VERIZON MARYLAND, INC. 236   2007-09-04   
301-355 6 Gaithersburg MD 9212 VERIZON MARYLAND, INC. 236   2007-09-04   
301-355 7 Gaithersburg MD 9212 VERIZON MARYLAND, INC. 236   2007-09-04   
301-407 4 Gaithersburg MD 9212 VERIZON MARYLAND, INC. 236   2003-05-10   
301-417 A Washington Zone 10 MD 9212 VERIZON MARYLAND, INC. 236      
301-417 0 Washington Zone 10 MD 9212 VERIZON MARYLAND, INC. 236      
301-417 1 Washington Zone 10 MD 9212 VERIZON MARYLAND, INC. 236      
301-417 2 Washington Zone 10 MD 9212 VERIZON MARYLAND, INC. 236      
301-417 6 Washington Zone 10 MD 9212 VERIZON MARYLAND, INC. 236      
301-417 7 Washington Zone 10 MD 9212 VERIZON MARYLAND, INC. 236      
301-417 9 Washington Zone 10 MD 9212 VERIZON MARYLAND, INC. 236      
301-444 7 Washington Zone 10 MD 9212 VERIZON MARYLAND, INC. 236   2004-06-10   
301-519 A Gaithersburg MD 9212 VERIZON MARYLAND, INC. 236      
301-527 A Gaithersburg MD 9212 VERIZON MARYLAND, INC. 236      
301-548 A Washington Zone 10 MD 9212 VERIZON MARYLAND, INC. 236      
301-590 A Washington Zone 10 MD 9212 VERIZON MARYLAND, INC. 236      
301-590 0 Washington Zone 10 MD 9212 VERIZON MARYLAND, INC. 236      
301-590 1 Washington Zone 10 MD 9212 VERIZON MARYLAND, INC. 236      
301-590 2 Washington Zone 10 MD 9212 VERIZON MARYLAND, INC. 236      
301-590 3 Washington Zone 10 MD 9212 VERIZON MARYLAND, INC. 236      
301-590 4 Washington Zone 10 MD 9212 VERIZON MARYLAND, INC. 236      
301-590 6 Washington Zone 10 MD 9212 VERIZON MARYLAND, INC. 236      
301-590 7 Washington Zone 10 MD 9212 VERIZON MARYLAND, INC. 236      
301-590 8 Washington Zone 10 MD 9212 VERIZON MARYLAND, INC. 236      
301-590 9 Washington Zone 10 MD 9212 VERIZON MARYLAND, INC. 236      
301-640 A Washington Zone 10 MD 9212 VERIZON MARYLAND, INC. 236      
301-640 2 Washington Zone 10 MD 9212 VERIZON MARYLAND, INC. 236      
301-640 3 Washington Zone 10 MD 9212 VERIZON MARYLAND, INC. 236      
301-640 4 Washington Zone 10 MD 9212 VERIZON MARYLAND, INC. 236      
301-640 7 Washington Zone 10 MD 9212 VERIZON MARYLAND, INC. 236      
301-670 A Washington Zone 10 MD 9212 VERIZON MARYLAND, INC. 236      
301-721 A Washington Zone 10 MD 9212 VERIZON MARYLAND, INC. 236      
301-740 A Gaithersburg MD 9212 VERIZON MARYLAND, INC. 236      
301-740 1 Gaithersburg MD 9212 VERIZON MARYLAND, INC. 236   2004-07-02   
301-740 2 Gaithersburg MD 9212 VERIZON MARYLAND, INC. 236   2004-07-02   
301-740 3 Gaithersburg MD 9212 VERIZON MARYLAND, INC. 236   2004-07-02   
301-740 7 Gaithersburg MD 9212 VERIZON MARYLAND, INC. 236   2006-03-30   
301-740 8 Gaithersburg MD 9212 VERIZON MARYLAND, INC. 236   2006-03-30   
301-740 9 Gaithersburg MD 9212 VERIZON MARYLAND, INC. 236   2006-03-30   
301-840 A Washington Zone 10 MD 9212 VERIZON MARYLAND, INC. 236      
301-869 A Gaithersburg MD 9212 VERIZON MARYLAND, INC. 236      
301-921 A Washington Zone 10 MD 9212 VERIZON MARYLAND, INC. 236      
301-921 0 Washington Zone 10 MD 9212 VERIZON MARYLAND, INC. 236      
301-921 1 Washington Zone 10 MD 9212 VERIZON MARYLAND, INC. 236      
301-921 2 Washington Zone 10 MD 9212 VERIZON MARYLAND, INC. 236      
301-921 3 Washington Zone 10 MD 9212 VERIZON MARYLAND, INC. 236      
301-921 4 Washington Zone 10 MD 9212 VERIZON MARYLAND, INC. 236      
301-921 7 Washington Zone 10 MD 9212 VERIZON MARYLAND, INC. 236      
301-921 8 Washington Zone 10 MD 9212 VERIZON MARYLAND, INC. 236      
301-921 9 Washington Zone 10 MD 9212 VERIZON MARYLAND, INC. 236      
301-926 A Gaithersburg MD 9212 VERIZON MARYLAND, INC. 236      
301-947 A Gaithersburg MD 9212 VERIZON MARYLAND, INC. 236      
301-948 A Washington Zone 10 MD 9212 VERIZON MARYLAND, INC. 236      
301-956 A Gaithersburg MD 9212 VERIZON MARYLAND, INC. 236      
301-956 1 Gaithersburg MD 9212 VERIZON MARYLAND, INC. 236      
301-963 A Gaithersburg MD 9212 VERIZON MARYLAND, INC. 236      
301-975 A Washington Zone 10 MD 9212 VERIZON MARYLAND, INC. 236      
301-975 0 Washington Zone 10 MD 9212 VERIZON MARYLAND, INC. 236      
301-975 1 Washington Zone 10 MD 9212 VERIZON MARYLAND, INC. 236      

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

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