A subsidiary of SBC, Ameritech is the large Incumbent Local Exchange Carrier (ILEC), a.k.a. RBOC, serving the 5-state region of Illinois, Michigan, Wisconsin, Indiana, and Ohio. Other services provided include Internet access, cellular and security systems. Has annoying television commercials including the annoying girl in the Ameritech commercial with references to bubble wrap. Their latest annoying commercials are about Privacy Manager, which is being marketed as the best thing since sliced bread. Which, theoretically doesn't completely block sales calls because any telemarketer can give their name and still get someone's phone to ring while they are bathing their child or brushing their teeth.

Since Ameritech is a phone company, their customer service as usual just plain sucks.