Panasonic Kx-Tgk210 Cordless Phone With Greek White Menu [Fam]

"Reduce unwanted calls such as telemarketers You can block any specified number, as well as any head string of 2 to 8 digits matching your specified numbers. The feature helps to reduce unwanted calls such as toll-free calls, and helps to keep your personal time from being interrupted. In addition, you can also block numberless calls. The KX-TGK210 supports 30 registrations to block numbers. Requires subscription to Caller ID service offered by your provider/telephone company. Numberless calls cannot be blocked depending on the service of your provider/telephone company."