Zero Cab
Iron Mountain, Michigan

Maker: Match Corporation of America Chicago IL  (Matchcover Collector: Taxi & Cabs)

Definitely a memorable phone number / company name combination. Zero Cab was owned by Jack B. Larson who died in California in April, 1977.

Radio Cab
Ludington, Michigan

Maker: Match Corporation of America Chicago IL  (Matchcover Collector: Taxi & Cabs)

Dan and Dorothy Fairchild took over Radio Cab in March, 1969 ("Radio Cab Company Now Under New Management," Ludington Daily News 1969-03-26 p. 2).