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.

NPA: 608 [Rate centres in NPA 608] [Dial plan for NPA 608]

NXX: 336

NPA-NXX BLOCK Rate Centre Region Switch OCN LATA LIR Eff date Disc date
608-336 A Monroe WI MONRWIXAPS0  0963 UTELCO, INC. 354      
608-336 0 Monroe WI MDSNWI11XAX  225C ONVOY, LLC - WI 354   2020-07-07   
608-336 1 Monroe WI MONRWIXAPS0  0963 UTELCO, INC. 354   2011-10-17   
608-336 2 Monroe WI MDSNWI11XAX  225C ONVOY, LLC - WI 354   2020-07-07   
608-336 3 Monroe WI MDSNWI11XAX  225C ONVOY, LLC - WI 354   2020-01-06   
608-336 4 Monroe WI MDSNWI11XAX  225C ONVOY, LLC - WI 354   2020-05-17   
608-336 5 Monroe WI MDSNWI11XAX  225C ONVOY, LLC - WI 354   2020-05-17   
608-336 6 Monroe WI MDSNWI02ZMD  7216 TELEPORT COMMUNICATIONS AMERICA, LLC WI 354   2019-09-11   
608-336 7 Monroe WI MDSNWI11XAY  624H ONVOY SPECTRUM, LLC 354   2021-06-24   
608-336 8 Monroe WI MDSRWIKEAMD  965H FRACTEL, LLC 354   2020-03-19   
608-336 9 Monroe WI MDSNWI11XAY  624H ONVOY SPECTRUM, LLC 354   2021-12-05   

Last updated: Sat, 05 Apr 2025 03:03:23 UTC

Sponsored by: Callcentric - VoIP Internet phone service

Like this site? We accept donations via PayPal.