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: 2593 CORE COMMUNICATIONS, INC.- 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 >>

NPA-NXX BLOCK Rate Centre Region Switch LATA LIR Eff date Disc date
240-616 9 Washington Zone 13 MD   236   2018-10-23   
240-617 6 Highfield MD   240   2019-07-31   
240-617 9 Highfield MD   240   2019-07-31   
240-621 9 Washington Zone 11 MD   236   2018-10-24   
240-622 A La Plata MD CHCHMDBEPS0  236      
240-622 0 La Plata MD   236   2018-08-02   
240-622 1 La Plata MD   236   2018-08-02   
240-622 2 La Plata MD   236   2018-08-02   
240-622 4 La Plata MD   236   2019-03-29   
240-622 6 La Plata MD   236   2019-03-29   
240-622 7 La Plata MD   236   2019-03-29   
240-624 1 Washington Zone 13 MD   236   2018-10-23   
240-627 5 Washington Zone 11 MD   236   2018-10-24   
240-628 A Mechanicsville MD CHCHMDBEPS0  236      
240-628 0 Mechanicsville MD   236   2018-08-02   
240-628 1 Mechanicsville MD   236   2018-08-02   
240-628 2 Mechanicsville MD   236   2018-08-02   
240-633 4 Hughesville MD   236   2019-03-29   
240-633 5 Hughesville MD   236   2019-04-30   
240-634 A Ridge MD CHCHMDBEPS0  236      
240-634 0 Ridge MD   236   2018-08-02   
240-634 1 Ridge MD   236   2018-08-02   
240-634 2 Ridge MD   236   2018-08-02   
240-634 4 Ridge MD   236   2019-07-30   
240-634 5 Ridge MD   236   2019-07-30   
240-634 6 Ridge MD   236   2019-03-29   
240-634 7 Ridge MD   236   2019-03-29   
240-635 A Tompkinsville MD CHCHMDBEPS0  236      
240-635 0 Tompkinsville MD   236   2018-08-02   
240-635 1 Tompkinsville MD   236   2018-08-02   
240-635 2 Tompkinsville MD   236   2018-08-02   
240-635 4 Tompkinsville MD   236   2019-04-30   
240-635 5 Tompkinsville MD   236   2019-04-30   
240-635 6 Tompkinsville MD   236   2019-04-30   
240-635 7 Tompkinsville MD   236   2019-04-30   
240-637 A Washington Zone 3 MD CHCHMDBEPS0  236      
240-637 0 Washington Zone 3 MD   236   2018-08-02   
240-637 1 Washington Zone 3 MD   236   2018-08-02   
240-637 2 Washington Zone 3 MD   236   2018-08-02   
240-637 3 Washington Zone 3 MD   236   2018-10-23   
240-637 9 Washington Zone 3 MD   236   2018-10-23   
240-639 A Laurel MD CHCHMDBEPS0  236      
240-639 0 Laurel MD   236   2018-07-23   
240-639 1 Laurel MD   236   2018-07-23   
240-639 7 Laurel MD   236   2018-07-23   
240-642 2 Washington Zone 10 MD   236   2019-04-29   
240-642 4 Washington Zone 10 MD   236   2019-04-29   
240-642 5 Washington Zone 10 MD   236   2019-04-29   
240-642 6 Washington Zone 10 MD   236   2019-04-29   
240-642 7 Washington Zone 10 MD   236   2019-04-29   

<< 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 >>

Last updated: Fri, 01 Jul 2022 02:53:40 UTC

Sponsored by: ISP Telecom

Like this site? We accept donations via PayPal.