November 30 is the latest deadline to get phone numbers added to Wisconsin's do-not call list.
Residential land lines, cellular phone numbers and voice over Internet protocol services can be added to the list.
Numbers added to the list by the Nov. 30 deadline would be added to the no-call list by January 1.
All registrations are good for two years but numbers be re-registered at any time.
Numbers can be added by calling 1-866-966-2255 or by clicking here.
The list is updated four times per calendar year.
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