Company
- 13 K-HIT, Am 13301
- 13 Q1
- 13K2
- 13K Radio2
- 15th Street Automotive Service1
- 1936 Winter Olympics1
- 1956 March of Dimes1
- 1st American Bank1
- 1st National1
- 1st Nationwide savings1
- 1st Triennial of Insitic Art1
- 1st of Tulsa1
- 2 KCOX-TV2
- 2 KGAN1
- 20 Vision5
- 20th Century Fox6
- 20th Century Garage and Firestone tires1
- 20th Century Pictures4
- 21 West2
- 22 / Twenty Two Club1
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