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.

OCN: 876D ONVOY, LLC - MD

<< 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 >>

NPA-NXX BLOCK Rate Centre Region Switch LATA LIR Eff date Disc date
301-297 3 Washington Zone 16 MD   236   2021-04-02   
301-298 2 Washington Zone 15 MD   236   2016-03-14   
301-298 3 Washington Zone 15 MD   236   2016-03-14   
301-307 1 Washington Zone 13 (Baltimore LATA) MD   238   2016-04-11   
301-307 2 Washington Zone 13 (Baltimore LATA) MD   238   2016-04-11   
301-307 4 Washington Zone 13 (Baltimore LATA) MD   238   2020-11-07   
301-307 9 Washington Zone 13 (Baltimore LATA) MD   238   2020-11-07   
301-313 5 Washington Zone 13 MD   236   2021-02-18   
301-321 7 Washington Zone 11 MD   236   2016-01-07   
301-321 8 Washington Zone 11 MD   236   2016-01-07   
301-327 2 Washington Zone 15 (Baltimore LATA) MD   238   2015-07-26   
301-329 A Ashton (Baltimore LATA) MD BLTMMDCH42Z  238      
301-329 2 Ashton (Baltimore LATA) MD   238   2012-10-07   
301-329 3 Ashton (Baltimore LATA) MD   238   2021-04-02   
301-329 4 Ashton (Baltimore LATA) MD   238   2014-09-05   
301-329 6 Ashton (Baltimore LATA) MD   238   2015-10-04   
301-329 8 Ashton (Baltimore LATA) MD   238   2016-01-05   
301-349 3 Poolesville MD   236   2016-03-01   
301-389 5 Washington Zone 13 MD   236   2016-04-06   
301-389 6 Washington Zone 13 MD   236   2016-04-06   
301-396 7 Waldorf MD   236   2019-02-19   
301-414 8 Damascus MD   236   2016-03-11   
301-417 5 Washington Zone 10 MD   236   2015-06-27   
301-433 7 Washington Zone 5 MD   236   2015-06-27   
301-453 4 Kitzmiller MD   240   2016-09-12   
301-453 8 Kitzmiller MD   240   2016-09-12   
301-458 3 Washington Zone 4 MD   236   2016-02-29   
301-477 8 Washington Zone 13 MD   236   2018-01-14   
301-477 9 Washington Zone 13 MD   236   2018-01-14   
301-478 8 Flintstone MD   240   2016-09-12   
301-478 9 Flintstone MD   240   2016-09-12   
301-485 2 Washington Zone 6 MD   236   2016-03-02   
301-485 4 Washington Zone 6 MD   236   2016-04-28   
301-485 5 Washington Zone 6 MD   236   2015-06-27   
301-517 6 Washington Zone 10 MD   236   2018-01-13   
301-517 9 Washington Zone 10 MD   236   2018-01-13   
301-547 7 Washington Zone 2 MD   236   2020-12-03   
301-579 7 Brandywine MD   236   2016-03-03   
301-579 8 Brandywine MD   236   2016-03-03   
301-591 7 Gaithersburg MD   236   2021-02-18   
301-603 3 Washington Zone 11 MD   236   2015-06-27   
301-610 3 Washington Zone 10 MD   236   2020-04-30   
301-638 8 Waldorf MD   236   2019-02-19   
301-640 5 Washington Zone 10 MD   236   2012-09-06   
301-666 2 Washington Zone 14 MD   236   2017-12-14   
301-678 1 Hancock MD   240   2016-09-12   
301-679 7 Washington Zone 12 MD   236   2012-10-07   
301-683 5 Washington Zone 4 MD   236   2014-10-24   
301-684 6 Indian Head MD   236   2012-09-13   
301-685 0 Damascus MD   236   2012-10-06   

<< 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 >>

Last updated: Mon, 24 May 2021 01:28:43 UTC

Sponsored by: FiberConX Communications Ltd.

Like this site? We accept donations via PayPal.