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: MDSNWI11XAY

1 2 3 >>

NPA-NXX BLOCK Rate Centre Region OCN LATA LIR Eff date Disc date
608-300 1 Blanchardville WI 624H ONVOY SPECTRUM, LLC 354   2021-11-27   
608-300 4 Blanchardville WI 624H ONVOY SPECTRUM, LLC 354   2021-06-24   
608-315 1 Tomah WI 624H ONVOY SPECTRUM, LLC 354   2021-06-24   
608-319 3 Dodgeville WI 624H ONVOY SPECTRUM, LLC 354   2021-06-24   
608-336 7 Monroe WI 624H ONVOY SPECTRUM, LLC 354   2021-06-24   
608-336 9 Monroe WI 624H ONVOY SPECTRUM, LLC 354   2021-12-05   
608-384 2 Mineral Point WI 624H ONVOY SPECTRUM, LLC 354   2021-06-24   
608-384 8 Mineral Point WI 624H ONVOY SPECTRUM, LLC 354   2021-11-27   
608-384 9 Mineral Point WI 624H ONVOY SPECTRUM, LLC 354   2021-11-27   
608-389 1 Baraboo WI 624H ONVOY SPECTRUM, LLC 354   2021-12-05   
608-389 3 Baraboo WI 624H ONVOY SPECTRUM, LLC 354   2021-06-24   
608-389 4 Baraboo WI 624H ONVOY SPECTRUM, LLC 354   2021-12-05   
608-401 3 Mazomanie WI 624H ONVOY SPECTRUM, LLC 354   2021-06-24   
608-401 6 Mazomanie WI 624H ONVOY SPECTRUM, LLC 354   2021-11-27   
608-401 9 Mazomanie WI 624H ONVOY SPECTRUM, LLC 354   2021-11-27   
608-407 4 Dodgeville WI 624H ONVOY SPECTRUM, LLC 354   2021-11-27   
608-407 5 Dodgeville WI 624H ONVOY SPECTRUM, LLC 354   2021-11-27   
608-426 9 Monroe WI 624H ONVOY SPECTRUM, LLC 354   2021-12-05   
608-454 1 Oregon WI 624H ONVOY SPECTRUM, LLC 354   2021-12-05   
608-454 3 Oregon WI 624H ONVOY SPECTRUM, LLC 354   2021-06-24   
608-454 9 Oregon WI 624H ONVOY SPECTRUM, LLC 354   2021-12-05   
608-456 0 Orfordville WI 624H ONVOY SPECTRUM, LLC 354   2021-11-27   
608-456 1 Orfordville WI 624H ONVOY SPECTRUM, LLC 354   2021-11-27   
608-456 4 Orfordville WI 624H ONVOY SPECTRUM, LLC 354   2021-06-24   
608-465 7 Woodford WI 624H ONVOY SPECTRUM, LLC 354   2021-06-24   
608-496 4 Cambridge WI 624H ONVOY SPECTRUM, LLC 354   2021-06-24   
608-505 0 Poynette WI 624H ONVOY SPECTRUM, LLC 354   2024-03-28   
608-506 8 Wonewoc WI 624H ONVOY SPECTRUM, LLC 354   2024-03-28   
608-544 1 Witwen WI 624H ONVOY SPECTRUM, LLC 354   2021-06-24   
608-549 4 Bloom City WI 624H ONVOY SPECTRUM, LLC 354   2021-06-24   
608-551 0 Brodhead WI 624H ONVOY SPECTRUM, LLC 354   2024-03-28   
608-564 0 Monroe Center WI 624H ONVOY SPECTRUM, LLC 354   2021-06-24   
608-583 6 Lone Rock WI 624H ONVOY SPECTRUM, LLC 354   2021-06-24   
608-585 6 Ithaca WI 624H ONVOY SPECTRUM, LLC 354   2021-06-24   
608-591 8 Lodi WI 624H ONVOY SPECTRUM, LLC 354   2021-06-24   
608-593 8 Reedsburg WI 624H ONVOY SPECTRUM, LLC 354   2021-06-24   
608-594 3 Plain WI 624H ONVOY SPECTRUM, LLC 354   2021-06-24   
608-597 9 McFarland WI 624H ONVOY SPECTRUM, LLC 354   2021-06-24   
608-599 7 Juda WI 624H ONVOY SPECTRUM, LLC 354   2021-06-24   
608-600 3 Clinton WI 624H ONVOY SPECTRUM, LLC 354   2021-06-24   
608-602 1 Waunakee WI 624H ONVOY SPECTRUM, LLC 354   2021-06-24   
608-605 8 Kendall WI 624H ONVOY SPECTRUM, LLC 354   2021-06-24   
608-607 8 Janesville WI 624H ONVOY SPECTRUM, LLC 354   2022-01-31   
608-607 9 Janesville WI 624H ONVOY SPECTRUM, LLC 354   2022-01-31   
608-610 5 Lime Ridge WI 624H ONVOY SPECTRUM, LLC 354   2021-06-24   
608-623 4 Cobb WI 624H ONVOY SPECTRUM, LLC 354   2021-06-24   
608-650 4 Necedah WI 624H ONVOY SPECTRUM, LLC 354   2021-06-24   
608-653 8 Verona WI 624H ONVOY SPECTRUM, LLC 354   2021-06-24   
608-655 0 Marshall WI 624H ONVOY SPECTRUM, LLC 354   2021-06-24   
608-666 8 Lyndon Station WI 624H ONVOY SPECTRUM, LLC 354   2021-06-24   

1 2 3 >>

Last updated: Wed, 04 Mar 2026 03:00:52 UTC

Sponsored by: VoIP Much Phone Company

Like this site? We accept donations via PayPal.