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.

Stamford, CT

<< 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 >>

NPA-NXX BLOCK Switch OCN LATA LIR Eff date Disc date
475-334 0 HRFRCTBCDS1  639C ONVOY, LLC - CT 920   2023-09-22   
475-334 1 HRFRCTBCDS1  639C ONVOY, LLC - CT 920   2023-09-22   
475-334 2 HRFRCTBCDS1  639C ONVOY, LLC - CT 920   2023-09-11   
475-334 3 HRFRCTBCDS1  639C ONVOY, LLC - CT 920   2023-09-22   
475-334 4 MDTWCTNIGT1  4036 NEW CINGULAR WIRELESS PCS, LLC - DC 920   2024-01-26   
475-334 5 HRFRCT03SMD  939H COMMIO, LLC 920   2023-12-23   
475-334 6 HRFRCT03SMD  939H COMMIO, LLC 920   2023-12-23   
475-334 7 HRFRCT03SMD  939H COMMIO, LLC 920   2023-12-23   
475-334 8 HRFRCT03SMD  939H COMMIO, LLC 920   2023-12-23   
475-334 9 HRFRCT03SMD  939H COMMIO, LLC 920   2023-12-23   
475-346 A HRFRCTBCDS1  639C ONVOY, LLC - CT 920   2024-02-11   
475-346 0 HRFRCTBCDS1  639C ONVOY, LLC - CT 920   2024-02-11   
475-346 2 HRFRCTBCDS1  639C ONVOY, LLC - CT 920   2024-02-11   
475-350 A HRFRCTASBMD  6388 CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CT 920      
475-350 0 HRFRCTASBMD  6388 CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CT 920   2016-01-15   
475-350 1 HRFRCTASBMD  6388 CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CT 920   2016-01-15   
475-350 2 HRFRCTASBMD  6388 CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CT 920   2016-01-15   
475-350 3 HRFRCTASBMD  6388 CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CT 920   2016-01-15   
475-350 4 HRFRCTASBMD  6388 CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CT 920   2016-01-15   
475-350 5 HRFRCTASBMD  6388 CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CT 920   2016-01-15   
475-350 6 HRFRCTASBMD  6388 CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CT 920   2016-02-29   
475-350 7 HRFRCTASBMD  6388 CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CT 920   2016-02-29   
475-350 8 HRFRCTASBMD  6388 CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CT 920   2016-03-29   
475-350 9 HRFRCTASBMD  6388 CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CT 920   2016-03-29   
475-359 A HRFRCTASBMD  6388 CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CT 920      
475-359 0 HRFRCTASBMD  6388 CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CT 920   2017-06-15   
475-359 1 HRFRCTASBMD  6388 CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CT 920   2017-06-15   
475-359 2 HRFRCTASBMD  6388 CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CT 920   2017-06-15   
475-359 3 HRFRCTASBMD  6388 CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CT 920   2017-06-15   
475-359 4 HRFRCT0380Z  539F PEERLESS NETWORK OF CONNECTICUT, LLC - CT 920   2020-01-07   
475-359 5 HRFRCT03CMD  197D VONAGE AMERICA LLC 920   2021-07-05   
475-359 6 NRWLCT02YMD  4950 CABLEVISION LIGHTPATH, INC. - CT 920   2018-04-27   
475-359 7 MDTWCTNIGT1  4036 NEW CINGULAR WIRELESS PCS, LLC - DC 920   2022-03-18   
475-359 8 HRFRCTBCDS1  639C ONVOY, LLC - CT 920   2019-02-15   
475-359 9 HRFRCTASBMD  6388 CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CT 920   2018-08-08   
475-399 A HRFRCTASBMD  6388 CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CT 920      
475-399 0 HRFRCTASBMD  6388 CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CT 920   2015-11-15   
475-399 1 HRFRCTASBMD  6388 CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CT 920   2015-11-15   
475-399 2 HRFRCTASBMD  6388 CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CT 920   2015-11-15   
475-399 3 HRFRCTASBMD  6388 CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CT 920   2015-12-01   
475-399 4 HRFRCTASBMD  6388 CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CT 920   2015-12-01   
475-399 5 HRFRCTASBMD  6388 CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CT 920   2015-12-01   
475-399 6 HRFRCTASBMD  6388 CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CT 920   2015-11-18   
475-399 7 HRFRCTASBMD  6388 CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CT 920   2015-11-18   
475-399 8 HRFRCTASBMD  6388 CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CT 920   2015-11-18   
475-399 9 HRFRCTASBMD  6388 CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CT 920   2015-11-18   
475-400 A HRFRCTBCDS1  639C ONVOY, LLC - CT 920      
475-400 0 HRFRCTBCDS1  639C ONVOY, LLC - CT 920   2018-01-22   
475-400 1 HRFRCTASBMD  6388 CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CT 920   2018-01-25   
475-400 2 HRFRCTASBMD  6388 CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CT 920   2018-01-25   

<< 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 >>

Last updated: Tue, 16 Apr 2024 01:38:01 UTC

Sponsored by: Callcentric - VoIP Internet phone service

Like this site? We accept donations via PayPal.