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.

Green Bay, WI

<< 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 >>

NPA-NXX BLOCK Switch OCN LATA LIR Eff date Disc date
920-471 4   5489 LEVEL 3 COMMUNICATIONS, LLC - WI 350      
920-471 5   6529 T-MOBILE USA, INC. 350   2004-10-23   
920-471 6   6529 T-MOBILE USA, INC. 350   2004-04-21   
920-471 7   6529 T-MOBILE USA, INC. 350   2004-03-26   
920-471 8   6529 T-MOBILE USA, INC. 350   2004-02-16   
920-471 9   6529 T-MOBILE USA, INC. 350   2004-01-26   
920-480 A GNBYWI01XNX  515J IP HORIZON LLC 350      
920-480 0   6534 NEW CINGULAR WIRELESS PCS, LLC - IL 350   2021-06-25   
920-480 1   515J IP HORIZON LLC 350   2021-06-24   
920-480 2   6534 NEW CINGULAR WIRELESS PCS, LLC - IL 350   2021-06-25   
920-480 3   6534 NEW CINGULAR WIRELESS PCS, LLC - IL 350   2021-06-25   
920-480 4   6534 NEW CINGULAR WIRELESS PCS, LLC - IL 350   2021-06-25   
920-480 5   624H ONVOY SPECTRUM, LLC 350   2021-11-14   
920-480 6   7216 TELEPORT COMMUNICATIONS AMERICA, LLC WI 350   2021-07-02   
920-480 7   225C ONVOY, LLC - WI 350   2021-11-14   
920-480 8   6534 NEW CINGULAR WIRELESS PCS, LLC - IL 350   2021-06-25   
920-480 9   6534 NEW CINGULAR WIRELESS PCS, LLC - IL 350   2021-06-25   
920-489 A GNBYWI01X5X  551G NUSO, LLC 350      
920-489 0   6529 T-MOBILE USA, INC. 350   2014-07-05   
920-489 1   551G NUSO, LLC 350   2013-05-08   
920-489 2   623D TIME WARNER CABLE INFORMATION SVCS (WISCONSIN) WI 350   2015-02-26   
920-489 3   007F BANDWIDTH.COM CLEC, LLC - WI 350   2015-04-12   
920-489 4   6529 T-MOBILE USA, INC. 350   2014-07-05   
920-489 5   6529 T-MOBILE USA, INC. 350   2014-07-05   
920-489 6   6529 T-MOBILE USA, INC. 350   2014-07-05   
920-489 7   6529 T-MOBILE USA, INC. 350   2014-07-05   
920-489 8   623D TIME WARNER CABLE INFORMATION SVCS (WISCONSIN) WI 350   2015-09-28   
920-489 9   6534 NEW CINGULAR WIRELESS PCS, LLC - IL 350   2015-10-07   
920-490 A GNBYWI11DSA  9327 WISCONSIN BELL INC 350      
920-491 A GNBYWI11DSA  9327 WISCONSIN BELL INC 350      
920-492 A GNBYWI11RS0  9327 WISCONSIN BELL INC 350      
920-492 0   6508 CELLCO PARTNERSHIP DBA VERIZON WIRELESS - WI 350   2013-03-14   
920-492 1   5562 METROPCS, INC. 350   2011-03-20   
920-492 2   9327 WISCONSIN BELL INC 350      
920-492 3   9327 WISCONSIN BELL INC 350      
920-492 4   9327 WISCONSIN BELL INC 350      
920-492 5   9327 WISCONSIN BELL INC 350      
920-492 6   5562 METROPCS, INC. 350   2017-02-23   
920-492 7   9327 WISCONSIN BELL INC 350      
920-492 8   6508 CELLCO PARTNERSHIP DBA VERIZON WIRELESS - WI 350   2017-07-07   
920-492 9   5562 METROPCS, INC. 350   2011-03-20   
920-494 A GNBYWI11DSA  9327 WISCONSIN BELL INC 350      
920-496 A GNBYWI11DSA  9327 WISCONSIN BELL INC 350      
920-497 A GNBYWI11DSA  9327 WISCONSIN BELL INC 350      
920-498 A GNBYWI11DSA  9327 WISCONSIN BELL INC 350      
920-499 A GNBYWI11DSA  9327 WISCONSIN BELL INC 350      
920-501 A GNBYWIATUMD  6534 NEW CINGULAR WIRELESS PCS, LLC - IL 350      
920-501 0   6534 NEW CINGULAR WIRELESS PCS, LLC - IL 350   2019-05-31   
920-501 1   6534 NEW CINGULAR WIRELESS PCS, LLC - IL 350   2019-05-31   
920-501 2   6534 NEW CINGULAR WIRELESS PCS, LLC - IL 350   2019-05-31   

<< 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 >>

Last updated: Thu, 29 Jan 2026 14:35:03 UTC

Sponsored by: Callcentric - VoIP Internet phone service

Like this site? We accept donations via PayPal.