Area Code 918-203 located in FORT GIBSON, MUSKOGEE, OK, more detail is as below. Place NPA (Numbering Plan Area) : 918 NXX (Local Number Prefix) : 203 City : FORT GIBSON County : MUSKOGEE State : OK (Oklahoma) NXX Use Type : Landline NXX Intro Version : 2004-05-02 FIPS (Federal Information Processing Standards) : 40101 LATA (Local Access Transport Area) : 538 Rate Center : FORTGIBSON ZIP Code Count : 0 ZIP Code Frequency : Most frequently occurring ZIP Code, although percentage is unknown. ZIP Code : 74434 Other Information NPANXX : 918203 Switch CLLI (Common Language Location Identifier) : TULSOK10SMD MSA CBSA (Core Based Statistical Area) : Muskogee, OK MSA CBSA Code (Core Based Statistical Area) : 34780 Time Zone : Central (GMT -06:00) Observes Daylight Saving Time : Yes Company : FULLTEL, INC. OCN (Operating Company Number) : 4589 Coverage Area Name : FORT GIBSON Latitude : 35.7986 Longitude : -95.2525 ‹ previous : 918-202 next › : 918-204 Telephone Number List 918-203-0000 ~ 918-203-9999