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 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 >>

NPA-NXX BLOCK Rate Centre Region Switch LATA LIR Eff date Disc date
667-201 6 Bel Air MD   238   2017-06-02   
667-202 A Elkton MD BLTMMDCH42Z  238      
667-202 0 Elkton MD   238   2016-04-14   
667-202 1 Elkton MD   238   2016-04-14   
667-206 3 Towson MD   238   2016-01-11   
667-206 5 Towson MD   238   2014-10-11   
667-206 6 Towson MD   238   2014-10-11   
667-213 1 Baltimore MD   238   2014-12-08   
667-213 2 Baltimore MD   238   2014-12-08   
667-213 5 Baltimore MD   238   2014-12-08   
667-213 6 Baltimore MD   238   2014-12-08   
667-215 4 Elkton MD   238   2021-09-23   
667-215 8 Elkton MD   238   2018-02-25   
667-218 3 Baltimore MD   238   2015-04-06   
667-218 4 Baltimore MD   238   2015-04-06   
667-218 5 Baltimore MD   238   2015-04-06   
667-220 A Greensboro MD SLBRMDSBXVX  242      
667-220 0 Greensboro MD   242   2017-05-15   
667-220 5 Greensboro MD   242   2019-05-17   
667-220 6 Greensboro MD   242   2020-06-20   
667-220 7 Greensboro MD   242   2020-06-20   
667-220 8 Greensboro MD   242   2019-03-04   
667-220 9 Greensboro MD   242   2019-03-04   
667-221 3 Salisbury MD   242   2024-07-12   
667-222 A Armiger-Gibson Island MD BLTMMDCH42Z  238      
667-222 0 Armiger-Gibson Island MD   238   2015-10-15   
667-222 1 Armiger-Gibson Island MD   238   2015-10-15   
667-222 2 Armiger-Gibson Island MD   238   2015-10-15   
667-222 3 Armiger-Gibson Island MD   238   2016-01-21   
667-222 4 Armiger-Gibson Island MD   238   2016-05-01   
667-222 5 Armiger-Gibson Island MD   238   2016-03-19   
667-222 6 Armiger-Gibson Island MD   238   2019-05-17   
667-225 3 Annapolis MD   238   2016-08-05   
667-225 5 Annapolis MD   238   2016-08-05   
667-226 A St Michaels MD SLBRMDSBXVX  242      
667-226 0 St Michaels MD   242   2017-05-11   
667-226 8 St Michaels MD   242   2019-02-26   
667-226 9 St Michaels MD   242   2019-02-26   
667-229 0 Aberdeen MD   236   2016-05-13   
667-229 2 Aberdeen MD   236   2016-05-13   
667-229 3 Aberdeen MD   236   2016-05-13   
667-229 4 Aberdeen MD   236   2016-05-13   
667-230 1 Centreville MD   242   2021-03-05   
667-230 2 Centreville MD   242   2018-05-27   
667-230 8 Centreville MD   242   2019-03-04   
667-230 9 Centreville MD   242   2019-03-04   
667-231 2 Aberdeen MD   236   2014-10-03   
667-231 3 Aberdeen MD   236   2014-10-03   
667-232 7 Glen Burnie MD   238   2022-10-16   
667-236 8 Perryville MD   238   2019-02-19   

<< 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 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 >>

Last updated: Thu, 29 Jan 2026 14:35:03 UTC

Sponsored by: BeeVox - Whitelabel Reseller Platform

Like this site? We accept donations via PayPal.