Area Code 401-421 located in PROVIDENCE, PROVIDENCE, RI, more detail is as below. Place NPA (Numbering Plan Area) : 401 NXX (Local Number Prefix) : 421 City : PROVIDENCE County : PROVIDENCE State : RI (Rhode Island) NXX Use Type : Landline NXX Intro Version : 1994-02-04 FIPS (Federal Information Processing Standards) : 44007 LATA (Local Access Transport Area) : 130 Rate Center : PROVIDENCE ZIP Code Count : 631 ZIP Code Frequency : 18 ZIP Code : 02908 Other Information NPANXX : 401421 County Population : 0 Switch CLLI (Common Language Location Identifier) : PRVDRIWADS2 MSA CBSA (Core Based Statistical Area) : Providence-New Bedford-Fall River, RI-MA MSA CBSA Code (Core Based Statistical Area) : 39300 Time Zone : Eastern (GMT -05:00) Observes Daylight Saving Time : Yes Company : VERIZON NEW ENGLAND INC. OCN (Operating Company Number) : 9102 Coverage Area Name : PROVIDENCE Latitude : 41.8203 Longitude : -71.4141 ‹ previous : 401-420 next › : 401-421 Telephone Number List 401-421-0000 ~ 401-421-9999