Register number with the DO NOT CALL list

I received the following from my company's HR department today:

"Cell phone numbers have recently been released to telemarketing companies, and so it’s possible that you may start to receive sales calls. To prevent this, register your cell phone number with the National DO NOT CALL list which blocks your number for five (5) years. Dial 1 888-382-1222 from the cell phone number that you want to have blocked. Visit https://www.donotcall.gov/default.aspx for more information."

I registered my two numbers using the website.

Cheers!