Do Not Call List
If you don't want telemarketers calling you on your cell phone, call 888-382-1222 from your cell phone.
Also, do-not-call requests expire after five years. If you signed up a land line when the do-not-call system arrived in 2003, your five years is about up. To get another five years free of telemarketers, you must reregister your number.
[https://www.donotcall.gov/ Do Not Call Registry