Map showing area codes of state of Colorado, and parts of surrounding states. Intended to replace Image:Area_codes_CO.png.  Now includes updated New Mexico area code 575.
Own work, created from imagemap data from Area codes 303 and 720 (which infects it with GFDL, I think), with data from Area_codes_CO.png and Area codes NM.svg gathered by inspection.
Ken Brazier (Ken_g6)