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: CATNMAAKPS0

<< 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 >>

NPA-NXX BLOCK Rate Centre Region OCN LATA LIR Eff date Disc date
857-524 0 South Boston MA 7229 MCIMETRO ACCESS TRANSMISSION SERVICES LLC 128      
857-524 5 South Boston MA 7229 MCIMETRO ACCESS TRANSMISSION SERVICES LLC 128      
857-559 A Brighton MA 7229 MCIMETRO ACCESS TRANSMISSION SERVICES LLC 128      
857-559 0 Brighton MA 7229 MCIMETRO ACCESS TRANSMISSION SERVICES LLC 128      
857-559 5 Brighton MA 7229 MCIMETRO ACCESS TRANSMISSION SERVICES LLC 128      
857-559 6 Brighton MA 7229 MCIMETRO ACCESS TRANSMISSION SERVICES LLC 128      
857-559 7 Brighton MA 7229 MCIMETRO ACCESS TRANSMISSION SERVICES LLC 128      
857-559 8 Brighton MA 7229 MCIMETRO ACCESS TRANSMISSION SERVICES LLC 128      
857-588 A Charlestown MA 7229 MCIMETRO ACCESS TRANSMISSION SERVICES LLC 128      
857-588 0 Charlestown MA 7229 MCIMETRO ACCESS TRANSMISSION SERVICES LLC 128      
857-588 5 Charlestown MA 7229 MCIMETRO ACCESS TRANSMISSION SERVICES LLC 128      
857-588 6 Charlestown MA 7229 MCIMETRO ACCESS TRANSMISSION SERVICES LLC 128      
857-588 7 Charlestown MA 7229 MCIMETRO ACCESS TRANSMISSION SERVICES LLC 128      
857-588 8 Charlestown MA 7229 MCIMETRO ACCESS TRANSMISSION SERVICES LLC 128      
857-588 9 Charlestown MA 7229 MCIMETRO ACCESS TRANSMISSION SERVICES LLC 128      
857-598 A Milton MA 7229 MCIMETRO ACCESS TRANSMISSION SERVICES LLC 128      
857-598 0 Milton MA 7229 MCIMETRO ACCESS TRANSMISSION SERVICES LLC 128      
857-598 1 Milton MA 7229 MCIMETRO ACCESS TRANSMISSION SERVICES LLC 128      
857-598 3 Milton MA 7229 MCIMETRO ACCESS TRANSMISSION SERVICES LLC 128      
857-600 3 Cambridge MA 7229 MCIMETRO ACCESS TRANSMISSION SERVICES LLC 128   2011-06-07   
857-600 4 Cambridge MA 7229 MCIMETRO ACCESS TRANSMISSION SERVICES LLC 128   2011-06-07   
857-728 A Jamaica Plain MA 7229 MCIMETRO ACCESS TRANSMISSION SERVICES LLC 128      
857-728 0 Jamaica Plain MA 7229 MCIMETRO ACCESS TRANSMISSION SERVICES LLC 128      
857-728 5 Jamaica Plain MA 7229 MCIMETRO ACCESS TRANSMISSION SERVICES LLC 128      
857-767 4 Boston MA 7229 MCIMETRO ACCESS TRANSMISSION SERVICES LLC 128   2022-08-01   
857-816 A Winthrop MA 7229 MCIMETRO ACCESS TRANSMISSION SERVICES LLC 128      
857-816 0 Winthrop MA 7229 MCIMETRO ACCESS TRANSMISSION SERVICES LLC 128      
857-816 1 Winthrop MA 7229 MCIMETRO ACCESS TRANSMISSION SERVICES LLC 128      
857-816 4 Winthrop MA 7229 MCIMETRO ACCESS TRANSMISSION SERVICES LLC 128      
978-202 A Concord MA 7229 MCIMETRO ACCESS TRANSMISSION SERVICES LLC 128      
978-202 3 Concord MA 7229 MCIMETRO ACCESS TRANSMISSION SERVICES LLC 128      
978-202 9 Concord MA 7229 MCIMETRO ACCESS TRANSMISSION SERVICES LLC 128      
978-222 A North Reading MA 7229 MCIMETRO ACCESS TRANSMISSION SERVICES LLC 128      
978-222 0 North Reading MA 7229 MCIMETRO ACCESS TRANSMISSION SERVICES LLC 128      
978-222 1 North Reading MA 7229 MCIMETRO ACCESS TRANSMISSION SERVICES LLC 128      
978-222 3 North Reading MA 7229 MCIMETRO ACCESS TRANSMISSION SERVICES LLC 128   2005-10-16   
978-222 8 North Reading MA 7229 MCIMETRO ACCESS TRANSMISSION SERVICES LLC 128      
978-222 9 North Reading MA 7229 MCIMETRO ACCESS TRANSMISSION SERVICES LLC 128      
978-231 A Gloucester MA 7229 MCIMETRO ACCESS TRANSMISSION SERVICES LLC 128      
978-231 0 Gloucester MA 7229 MCIMETRO ACCESS TRANSMISSION SERVICES LLC 128      
978-231 1 Gloucester MA 7229 MCIMETRO ACCESS TRANSMISSION SERVICES LLC 128      
978-231 2 Gloucester MA 7229 MCIMETRO ACCESS TRANSMISSION SERVICES LLC 128      
978-231 4 Gloucester MA 7229 MCIMETRO ACCESS TRANSMISSION SERVICES LLC 128      
978-231 5 Gloucester MA 7229 MCIMETRO ACCESS TRANSMISSION SERVICES LLC 128      
978-231 6 Gloucester MA 7229 MCIMETRO ACCESS TRANSMISSION SERVICES LLC 128      
978-231 7 Gloucester MA 7229 MCIMETRO ACCESS TRANSMISSION SERVICES LLC 128      
978-231 8 Gloucester MA 7229 MCIMETRO ACCESS TRANSMISSION SERVICES LLC 128      
978-236 7 Beverly MA 7229 MCIMETRO ACCESS TRANSMISSION SERVICES LLC 128   2006-11-12   
978-236 9 Beverly MA 7229 MCIMETRO ACCESS TRANSMISSION SERVICES LLC 128   2004-09-30   
978-238 1 Ipswich MA 7229 MCIMETRO ACCESS TRANSMISSION SERVICES LLC 128   2005-02-12   

<< 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 >>

Last updated: Thu, 05 Feb 2026 23:41:55 UTC

Sponsored by: ISP Telecom

Like this site? We accept donations via PayPal.