- Location and Time
- Area code 918 covers Tulsa, Broken Arrow, and Muskogee in northeastern Oklahoma
- Located in Central timezone (America/Chicago)
- History and Development
- Created in 1953 as Oklahoma's 91st area code
- Area code 539 was created in 2011 as overlay
- Required 18 pulses to dial, prioritized over other codes created in 1950s
- Telephone Coverage
- 99% assigned to telco, 66% landline, 34% wireless
- Primary city is Tulsa
- Multiple carriers serve area including Sprint, Verizon, and Fulltel
- Historical Context
- Area codes prioritized for faster dialing before 1960s
- 26 other codes created before/after 918 averaged 19.0 pulses
- Current 470 active codes average 16.3 pulses