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: HRFRCTBCDS1

<< 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
475-270 4 Wallingford CT 639C ONVOY, LLC - CT 920   2021-02-27   
475-270 5 Wallingford CT 639C ONVOY, LLC - CT 920   2021-02-27   
475-270 6 Wallingford CT 639C ONVOY, LLC - CT 920   2021-02-27   
475-270 7 Wallingford CT 639C ONVOY, LLC - CT 920   2021-02-27   
475-270 8 Wallingford CT 639C ONVOY, LLC - CT 920   2021-06-03   
475-270 9 Wallingford CT 639C ONVOY, LLC - CT 920   2021-06-03   
475-271 A Milford CT 639C ONVOY, LLC - CT 920      
475-271 1 Milford CT 639C ONVOY, LLC - CT 920   2020-08-10   
475-271 2 Milford CT 639C ONVOY, LLC - CT 920   2020-08-10   
475-271 3 Milford CT 639C ONVOY, LLC - CT 920   2020-11-22   
475-271 4 Milford CT 639C ONVOY, LLC - CT 920   2021-03-01   
475-271 5 Milford CT 639C ONVOY, LLC - CT 920   2021-03-01   
475-271 7 Milford CT 639C ONVOY, LLC - CT 920   2021-03-01   
475-271 8 Milford CT 639C ONVOY, LLC - CT 920   2021-03-01   
475-272 1 Fairfield CT 639C ONVOY, LLC - CT 920   2021-08-01   
475-272 2 Fairfield CT 639C ONVOY, LLC - CT 920   2020-11-22   
475-272 3 Fairfield CT 639C ONVOY, LLC - CT 920   2021-03-04   
475-272 4 Fairfield CT 639C ONVOY, LLC - CT 920   2021-03-04   
475-272 7 Fairfield CT 639C ONVOY, LLC - CT 920   2020-11-22   
475-272 8 Fairfield CT 639C ONVOY, LLC - CT 920   2021-08-01   
475-274 3 Guilford CT 639C ONVOY, LLC - CT 920   2023-08-18   
475-277 4 Wilton CT 639C ONVOY, LLC - CT 920   2015-05-15   
475-280 2 Ansonia-Derby CT 639C ONVOY, LLC - CT 920   2021-07-19   
475-280 3 Ansonia-Derby CT 639C ONVOY, LLC - CT 920   2021-07-19   
475-280 4 Ansonia-Derby CT 639C ONVOY, LLC - CT 920   2021-07-19   
475-280 5 Ansonia-Derby CT 639C ONVOY, LLC - CT 920   2021-07-19   
475-281 2 Ansonia-Derby CT 639C ONVOY, LLC - CT 920   2021-03-04   
475-281 3 Ansonia-Derby CT 639C ONVOY, LLC - CT 920   2021-03-04   
475-283 9 Norwalk CT 639C ONVOY, LLC - CT 920   2019-03-29   
475-284 2 Bridgeport CT 639C ONVOY, LLC - CT 920   2021-02-18   
475-284 3 Bridgeport CT 639C ONVOY, LLC - CT 920   2021-02-18   
475-284 4 Bridgeport CT 639C ONVOY, LLC - CT 920   2021-01-01   
475-284 5 Bridgeport CT 639C ONVOY, LLC - CT 920   2021-01-01   
475-284 7 Bridgeport CT 639C ONVOY, LLC - CT 920   2021-02-18   
475-284 8 Bridgeport CT 639C ONVOY, LLC - CT 920   2021-02-18   
475-285 2 Naugatuck CT 639C ONVOY, LLC - CT 920   2021-03-04   
475-285 3 Naugatuck CT 639C ONVOY, LLC - CT 920   2021-03-04   
475-285 4 Naugatuck CT 639C ONVOY, LLC - CT 920   2021-08-01   
475-285 5 Naugatuck CT 639C ONVOY, LLC - CT 920   2021-08-01   
475-285 6 Naugatuck CT 639C ONVOY, LLC - CT 920   2021-08-01   
475-285 7 Naugatuck CT 639C ONVOY, LLC - CT 920   2021-08-01   
475-288 7 Norwalk CT 639C ONVOY, LLC - CT 920   2023-10-14   
475-288 9 Norwalk CT 639C ONVOY, LLC - CT 920   2023-10-14   
475-290 6 Danbury CT 639C ONVOY, LLC - CT 920   2024-02-04   
475-291 3 Norwalk CT 639C ONVOY, LLC - CT 920   2022-12-17   
475-291 4 Norwalk CT 639C ONVOY, LLC - CT 920   2022-12-17   
475-291 5 Norwalk CT 639C ONVOY, LLC - CT 920   2022-12-17   
475-291 9 Norwalk CT 639C ONVOY, LLC - CT 920   2024-04-20   
475-292 2 Stamford CT 639C ONVOY, LLC - CT 920   2016-03-07   
475-292 3 Stamford CT 639C ONVOY, LLC - CT 920   2016-03-07   

<< 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: Fri, 10 Jul 2026 02:55:48 UTC

Sponsored by: Callcentric - VoIP Internet phone service

Like this site? We accept donations via PayPal.