Area Code 307-549 located in YELLOWSTONE NATIONAL PARK, PARK, WY, more detail is as below. Place NPA (Numbering Plan Area) : 307 NXX (Local Number Prefix) : 549 City : YELLOWSTONE NATIONAL PARK County : PARK State : WY (Wyoming) NXX Use Type : Wireless NXX Intro Version : 1995-02-11 FIPS (Federal Information Processing Standards) : 56029 LATA (Local Access Transport Area) : 650 Rate Center : OLDFATHFUL ZIP Code Count : 0 ZIP Code Frequency : Most frequently occurring ZIP Code, although percentage is unknown. ZIP Code : 82190 Other Information NPANXX : 307549 County Population : 0 Switch CLLI (Common Language Location Identifier) : MNVWWYXCCM1 Time Zone : Mountain (GMT -07:00) Observes Daylight Saving Time : Yes Company : UNION TELEPHONE COMPANY OCN (Operating Company Number) : 013B Coverage Area Name : YELLOWSTONE NATIONAL PARK Latitude : 44.4657 Longitude : -110.8358 ‹ previous : 307-548 next › : 307-554 Telephone Number List 307-549-0000 ~ 307-549-9999