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: CMBRMAORDSG

<< 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 >>

NPA-NXX BLOCK Rate Centre Region OCN LATA LIR Eff date Disc date
978-378 A Amesbury MA 4018 LEVEL 3 COMMUNICATIONS, LLC - MA 128   2025-04-11   
978-378 3 Amesbury MA 4018 LEVEL 3 COMMUNICATIONS, LLC - MA 128   2004-09-02   
978-378 4 Amesbury MA 4018 LEVEL 3 COMMUNICATIONS, LLC - MA 128   2005-09-05   
978-380 5 Ipswich MA 4018 LEVEL 3 COMMUNICATIONS, LLC - MA 128   2006-05-13   
978-381 A Gloucester MA 4018 LEVEL 3 COMMUNICATIONS, LLC - MA 128      
978-381 0 Gloucester MA 4018 LEVEL 3 COMMUNICATIONS, LLC - MA 128   2004-12-11   
978-381 4 Gloucester MA 4018 LEVEL 3 COMMUNICATIONS, LLC - MA 128      
978-384 1 Merrimac MA 4018 LEVEL 3 COMMUNICATIONS, LLC - MA 128   2006-05-26   
978-384 3 Merrimac MA 4018 LEVEL 3 COMMUNICATIONS, LLC - MA 128   2004-09-03   
978-386 3 Ashby MA 4018 LEVEL 3 COMMUNICATIONS, LLC - MA 128   2004-09-02   
978-401 A Leominster MA 4018 LEVEL 3 COMMUNICATIONS, LLC - MA 128      
978-401 0 Leominster MA 4018 LEVEL 3 COMMUNICATIONS, LLC - MA 128      
978-401 4 Leominster MA 4018 LEVEL 3 COMMUNICATIONS, LLC - MA 128   2004-09-03   
978-401 9 Leominster MA 4018 LEVEL 3 COMMUNICATIONS, LLC - MA 128      
978-410 3 Gardner MA 4018 LEVEL 3 COMMUNICATIONS, LLC - MA 128   2006-08-31   
978-412 4 Ipswich MA 4018 LEVEL 3 COMMUNICATIONS, LLC - MA 128   2004-09-03   
978-415 4 Berlin MA 4018 LEVEL 3 COMMUNICATIONS, LLC - MA 128   2006-05-13   
978-415 5 Berlin MA 4018 LEVEL 3 COMMUNICATIONS, LLC - MA 128   2008-02-14   
978-416 A Lawrence MA 4018 LEVEL 3 COMMUNICATIONS, LLC - MA 128      
978-416 0 Lawrence MA 4018 LEVEL 3 COMMUNICATIONS, LLC - MA 128      
978-416 2 Lawrence MA 4018 LEVEL 3 COMMUNICATIONS, LLC - MA 128      
978-416 7 Lawrence MA 4018 LEVEL 3 COMMUNICATIONS, LLC - MA 128      
978-420 4 Haverhill MA 4018 LEVEL 3 COMMUNICATIONS, LLC - MA 128   2003-01-12   
978-422 1 Sterling MA 4018 LEVEL 3 COMMUNICATIONS, LLC - MA 128   2005-02-14   
978-422 4 Sterling MA 4018 LEVEL 3 COMMUNICATIONS, LLC - MA 128   2004-01-13   
978-424 4 Fitchburg MA 4018 LEVEL 3 COMMUNICATIONS, LLC - MA 128   2003-08-20   
978-425 1 Shirley MA 4018 LEVEL 3 COMMUNICATIONS, LLC - MA 128   2004-09-03   
978-429 A Acton MA 4018 LEVEL 3 COMMUNICATIONS, LLC - MA 128      
978-429 0 Acton MA 4018 LEVEL 3 COMMUNICATIONS, LLC - MA 128      
978-434 5 Barre MA 4018 LEVEL 3 COMMUNICATIONS, LLC - MA 128   2005-12-24   
978-451 A Concord MA 4018 LEVEL 3 COMMUNICATIONS, LLC - MA 128      
978-451 0 Concord MA 4018 LEVEL 3 COMMUNICATIONS, LLC - MA 128   2005-01-12   
978-451 4 Concord MA 4018 LEVEL 3 COMMUNICATIONS, LLC - MA 128   2004-01-13   
978-451 6 Concord MA 4018 LEVEL 3 COMMUNICATIONS, LLC - MA 128   2006-01-28   
978-451 7 Concord MA 4018 LEVEL 3 COMMUNICATIONS, LLC - MA 128   2006-01-28   
978-456 5 Harvard MA 4018 LEVEL 3 COMMUNICATIONS, LLC - MA 128   2004-09-03   
978-467 1 Westford MA 4018 LEVEL 3 COMMUNICATIONS, LLC - MA 128   2006-01-28   
978-467 4 Westford MA 4018 LEVEL 3 COMMUNICATIONS, LLC - MA 128   2004-10-01   
978-478 4 Haverhill MA 4018 LEVEL 3 COMMUNICATIONS, LLC - MA 128   2005-02-27   
978-480 A Townsend MA 4018 LEVEL 3 COMMUNICATIONS, LLC - MA 128      
978-480 2 Townsend MA 4018 LEVEL 3 COMMUNICATIONS, LLC - MA 128   2006-05-26   
978-481 3 Princeton MA 4018 LEVEL 3 COMMUNICATIONS, LLC - MA 128   2004-09-03   
978-481 5 Princeton MA 4018 LEVEL 3 COMMUNICATIONS, LLC - MA 128   2006-05-26   
978-482 A Andover MA 4018 LEVEL 3 COMMUNICATIONS, LLC - MA 128      
978-482 0 Andover MA 4018 LEVEL 3 COMMUNICATIONS, LLC - MA 128      
978-482 3 Andover MA 4018 LEVEL 3 COMMUNICATIONS, LLC - MA 128      
978-482 4 Andover MA 4018 LEVEL 3 COMMUNICATIONS, LLC - MA 128      
978-485 A Salem MA 4018 LEVEL 3 COMMUNICATIONS, LLC - MA 128   2025-04-11   
978-485 0 Salem MA 4018 LEVEL 3 COMMUNICATIONS, LLC - MA 128      
978-490 3 Westford MA 4018 LEVEL 3 COMMUNICATIONS, LLC - MA 128   2008-01-31   

<< 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 >>

Last updated: Sat, 01 Aug 2026 03:19:33 UTC

Sponsored by: ISP Telecom

Like this site? We accept donations via PayPal.