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: CMBRMA01DS5

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NPA-NXX BLOCK Rate Centre Region OCN LATA LIR Eff date Disc date
617-218 A Cambridge MA 7135 TC SYSTEMS, INC. 128      
617-218 0 Cambridge MA 7135 TC SYSTEMS, INC. 128      
617-218 1 Cambridge MA 7135 TC SYSTEMS, INC. 128      
617-218 2 Cambridge MA 7135 TC SYSTEMS, INC. 128      
617-218 3 Cambridge MA 7135 TC SYSTEMS, INC. 128      
617-218 4 Cambridge MA 7135 TC SYSTEMS, INC. 128      
617-218 5 Cambridge MA 7135 TC SYSTEMS, INC. 128      
617-218 6 Cambridge MA 7135 TC SYSTEMS, INC. 128      
617-218 8 Cambridge MA 7135 TC SYSTEMS, INC. 128      
617-218 9 Cambridge MA 7135 TC SYSTEMS, INC. 128      
617-250 A Cambridge MA 7135 TC SYSTEMS, INC. 128      
617-250 1 Cambridge MA 7135 TC SYSTEMS, INC. 128      
617-250 2 Cambridge MA 7135 TC SYSTEMS, INC. 128      
617-250 3 Cambridge MA 7135 TC SYSTEMS, INC. 128      
617-250 4 Cambridge MA 7135 TC SYSTEMS, INC. 128      
617-250 5 Cambridge MA 7135 TC SYSTEMS, INC. 128      
617-250 6 Cambridge MA 7135 TC SYSTEMS, INC. 128      
617-250 9 Cambridge MA 7135 TC SYSTEMS, INC. 128      
617-378 A Boston MA 7135 TC SYSTEMS, INC. 128      
617-378 0 Boston MA 7135 TC SYSTEMS, INC. 128      
617-378 3 Boston MA 7135 TC SYSTEMS, INC. 128      
617-378 4 Boston MA 7135 TC SYSTEMS, INC. 128      
617-378 6 Boston MA 7135 TC SYSTEMS, INC. 128      
617-378 9 Boston MA 7135 TC SYSTEMS, INC. 128      
617-396 A Brookline MA 7135 TC SYSTEMS, INC. 128      
617-396 9 Brookline MA 7135 TC SYSTEMS, INC. 128      
617-406 A Boston MA 7135 TC SYSTEMS, INC. 128      
617-406 0 Boston MA 7135 TC SYSTEMS, INC. 128      
617-406 1 Boston MA 7135 TC SYSTEMS, INC. 128      
617-406 2 Boston MA 7135 TC SYSTEMS, INC. 128      
617-406 3 Boston MA 7135 TC SYSTEMS, INC. 128      
617-406 4 Boston MA 7135 TC SYSTEMS, INC. 128      
617-406 5 Boston MA 7135 TC SYSTEMS, INC. 128      
617-406 6 Boston MA 7135 TC SYSTEMS, INC. 128      
617-409 4 Chelsea MA 7135 TC SYSTEMS, INC. 128   2002-05-18   
617-431 A Newton MA 7135 TC SYSTEMS, INC. 128      
617-431 9 Newton MA 7135 TC SYSTEMS, INC. 128      
617-433 A Milton MA 7135 TC SYSTEMS, INC. 128      
617-433 3 Milton MA 7135 TC SYSTEMS, INC. 128      
617-454 A Newton MA 7135 TC SYSTEMS, INC. 128      
617-454 0 Newton MA 7135 TC SYSTEMS, INC. 128      
617-454 1 Newton MA 7135 TC SYSTEMS, INC. 128      
617-454 2 Newton MA 7135 TC SYSTEMS, INC. 128      
617-454 3 Newton MA 7135 TC SYSTEMS, INC. 128      
617-454 6 Newton MA 7135 TC SYSTEMS, INC. 128      
617-454 9 Newton MA 7135 TC SYSTEMS, INC. 128      
617-528 A Cambridge MA 7135 TC SYSTEMS, INC. 128      
617-528 1 Cambridge MA 7135 TC SYSTEMS, INC. 128      
617-528 2 Cambridge MA 7135 TC SYSTEMS, INC. 128      
617-528 3 Cambridge MA 7135 TC SYSTEMS, INC. 128      
617-528 4 Cambridge MA 7135 TC SYSTEMS, INC. 128      
617-528 5 Cambridge MA 7135 TC SYSTEMS, INC. 128      
617-528 6 Cambridge MA 7135 TC SYSTEMS, INC. 128      
617-528 7 Cambridge MA 7135 TC SYSTEMS, INC. 128      
617-530 A Boston MA 7135 TC SYSTEMS, INC. 128      
617-530 2 Boston MA 7135 TC SYSTEMS, INC. 128      
617-530 4 Boston MA 7135 TC SYSTEMS, INC. 128      
617-530 5 Boston MA 7135 TC SYSTEMS, INC. 128      
617-530 6 Boston MA 7135 TC SYSTEMS, INC. 128      
617-530 7 Boston MA 7135 TC SYSTEMS, INC. 128      
617-530 8 Boston MA 7135 TC SYSTEMS, INC. 128      
617-530 9 Boston MA 7135 TC SYSTEMS, INC. 128      
617-544 4 Everett MA 7135 TC SYSTEMS, INC. 128   2002-05-18   
617-612 A Watertown MA 7135 TC SYSTEMS, INC. 128      
617-612 1 Watertown MA 7135 TC SYSTEMS, INC. 128      
617-612 2 Watertown MA 7135 TC SYSTEMS, INC. 128      
617-612 7 Watertown MA 7135 TC SYSTEMS, INC. 128      
617-612 9 Watertown MA 7135 TC SYSTEMS, INC. 128      
617-613 A Cambridge MA 7135 TC SYSTEMS, INC. 128      
617-616 A Somerville MA 7135 TC SYSTEMS, INC. 128      
617-616 1 Somerville MA 7135 TC SYSTEMS, INC. 128      
617-616 4 Somerville MA 7135 TC SYSTEMS, INC. 128      
617-616 6 Somerville MA 7135 TC SYSTEMS, INC. 128      
617-616 7 Somerville MA 7135 TC SYSTEMS, INC. 128      
617-663 A Newton MA 7135 TC SYSTEMS, INC. 128      
617-663 1 Newton MA 7135 TC SYSTEMS, INC. 128      
617-663 2 Newton MA 7135 TC SYSTEMS, INC. 128      
617-663 3 Newton MA 7135 TC SYSTEMS, INC. 128      
617-663 4 Newton MA 7135 TC SYSTEMS, INC. 128      
617-663 5 Newton MA 7135 TC SYSTEMS, INC. 128      
617-663 7 Newton MA 7135 TC SYSTEMS, INC. 128      
617-663 9 Newton MA 7135 TC SYSTEMS, INC. 128      
617-668 5 Watertown MA 7135 TC SYSTEMS, INC. 128   2016-02-15   
617-932 A Belmont MA 7135 TC SYSTEMS, INC. 128      
617-932 4 Belmont MA 7135 TC SYSTEMS, INC. 128   2004-03-21   
617-942 A Jamaica Plain MA 7135 TC SYSTEMS, INC. 128      
617-942 9 Jamaica Plain MA 7135 TC SYSTEMS, INC. 128      
781-202 A Burlington MA 7135 TC SYSTEMS, INC. 128      
781-202 0 Burlington MA 7135 TC SYSTEMS, INC. 128      
781-205 A Reading MA 7135 TC SYSTEMS, INC. 128      
781-205 5 Reading MA 7135 TC SYSTEMS, INC. 128      
781-216 A Waltham MA 7135 TC SYSTEMS, INC. 128      
781-216 4 Waltham MA 7135 TC SYSTEMS, INC. 128      
781-216 5 Waltham MA 7135 TC SYSTEMS, INC. 128      
781-216 6 Waltham MA 7135 TC SYSTEMS, INC. 128      
781-216 7 Waltham MA 7135 TC SYSTEMS, INC. 128      
781-216 9 Waltham MA 7135 TC SYSTEMS, INC. 128      
781-218 A Winchester MA 7135 TC SYSTEMS, INC. 128      
781-218 0 Winchester MA 7135 TC SYSTEMS, INC. 128      
781-225 A Lexington MA 7135 TC SYSTEMS, INC. 128      

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Last updated: Wed, 18 Jun 2025 02:30:00 UTC

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