Area Code 720-204 located in LONGMONT, BOULDER, CO, more detail is as below. Place NPA (Numbering Plan Area) : 720 NXX (Local Number Prefix) : 204 City : LONGMONT County : BOULDER State : CO (Colorado) NXX Use Type : Landline NXX Intro Version : 1999-02-27 FIPS (Federal Information Processing Standards) : 08013 LATA (Local Access Transport Area) : 656 Rate Center : LONGMONT ZIP Code Count : 1 ZIP Code Frequency : 100 ZIP Code : 80501 Other Information NPANXX : 720204 Switch CLLI (Common Language Location Identifier) : DNVRCOZJDS2 MSA CBSA (Core Based Statistical Area) : Boulder, CO MSA CBSA Code (Core Based Statistical Area) : 14500 Time Zone : Mountain (GMT -07:00) Observes Daylight Saving Time : Yes Overlay : L Company : AT&T LOCAL OCN (Operating Company Number) : 7421 Coverage Area Name : LONGMONT Latitude : 40.1633 Longitude : -105.1061 ‹ previous : 720-203 next › : 720-205 Telephone Number List 720-204-0000 ~ 720-204-9999