Area Code 918-221 located in TULSA, TULSA, OK, more detail is as below. Place NPA (Numbering Plan Area) : 918 NXX (Local Number Prefix) : 221 City : TULSA County : TULSA State : OK (Oklahoma) NXX Use Type : Landline NXX Intro Version : 7/14/2009 FIPS (Federal Information Processing Standards) : 40143 LATA (Local Access Transport Area) : 538 Rate Center : TULSA ZIP Code Count : 0 ZIP Code Frequency : 0 ZIP Code : 74172 Other Information NPANXX : 918221 MSA CBSA (Core Based Statistical Area) : Tulsa, OK MSA CBSA Code (Core Based Statistical Area) : 46140 Time Zone : Central (GMT -06:00) Observes Daylight Saving Time : Yes Company : BIG RIVER TELEPHONE COMPANY, LLC - MO OCN (Operating Company Number) : 023B Coverage Area Name : TULSA Latitude : 36.1509 Longitude : -95.9853 ‹ previous : 918-220 next › : 918-222 Telephone Number List 918-221-0000 ~ 918-221-9999