Area Code 202-478 located in WASHINGTON, DISTRICT OF COLUMBIA, DC, more detail is as below. Place NPA (Numbering Plan Area) : 202 NXX (Local Number Prefix) : 478 City : WASHINGTON County : DISTRICT OF COLUMBIA State : DC (District of Columbia) NXX Use Type : Landline NXX Intro Version : 1997-01-11 FIPS (Federal Information Processing Standards) : 11001 LATA (Local Access Transport Area) : 236 Rate Center : WSHNGTNZN1 ZIP Code Count : 2 ZIP Code Frequency : 11 ZIP Code : 20004 Other Information NPANXX : 202478 County Population : 0 MSA CBSA (Core Based Statistical Area) : Washington-Arlington-Alexandria, DC-VA-MD-WV MSA CBSA Code (Core Based Statistical Area) : 47900 Time Zone : Eastern (GMT -05:00) Observes Daylight Saving Time : Yes Company : MCI WORLDCOM COMMUNICATIONS, INC. - DC OCN (Operating Company Number) : 7445 Coverage Area Name : WASHINGTON Latitude : 38.9010 Longitude : -77.0315 ‹ previous : 202-478 next › : 202-478 Telephone Number List 202-478-0000 ~ 202-478-9999