Area Code 580-661 located in THOMAS, CUSTER, OK, more detail is as below. Place NPA (Numbering Plan Area) : 580 NXX (Local Number Prefix) : 661 City : THOMAS County : CUSTER State : OK (Oklahoma) NXX Use Type : Landline NXX Intro Version : 1998-01-25 FIPS (Federal Information Processing Standards) : 40039 LATA (Local Access Transport Area) : 536 Rate Center : THOMAS ZIP Code Count : 758 ZIP Code Frequency : 100 ZIP Code : 73669 Other Information NPANXX : 580661 County Population : 0 Switch CLLI (Common Language Location Identifier) : THMSOKXARS0 MSA CBSA (Core Based Statistical Area) : Weatherford, OK MSA CBSA Code (Core Based Statistical Area) : 48220 Time Zone : Central (GMT -06:00) Observes Daylight Saving Time : Yes Company : PIONEER TELEPHONE COOPERATIVE, INC. OCN (Operating Company Number) : 2018 Coverage Area Name : THOMAS Latitude : 35.7493 Longitude : -98.7485 ‹ previous : 580-660 next › : 580-662 Telephone Number List 580-661-0000 ~ 580-661-9999