If you've not yet registered on nocall, you can add your numbers by Aug. 31.” The free No Call service is managed by DATCP. The service covers Wisconsin consumers’ residential landline, VoIP and cellular numbers and includes protections against unwanted text messages. Consumers can register multiple numbers. Registrations are good for two years, but consumers can re-register their numbers at any time. To add your number(s) to the list, visit nocall.wisconsin.gov or dial 1-866-9NO-CALL (1-866-966-2255). The website and toll-free number are available all day, every day. Political calls, calls from non-profit organizations and calls made in response to your written or verbal request or permission are not covered by the No Call law.  The list is updated four times per calendar year (Jan. 1, April 1, July 1 and Oct. 1). The registration process is continuous, but those who sign up after the upcoming August 31 deadline will not be added to the list until Jan. 1