Area Code +1-779-(2003000...2003999) located in Rockford, Illinois (IL), more detail is as below. Place International Dialing Code : 1 International Prefix : 011 National Prefix : 1 National Destination Code : 779 Subscriber Number From : 2003000 Subscriber Number To : 2003999 National Destination Code Length : 3 Uses National Destination Code : Yes National Significant Number Length : 10 Number Type : G (Geographic Land Line, Fixed Line) Carrier Name : LEVEL 3 COMM - IL Click here to buy United States Area Code Database Other Information Language Code : en (English) Country Number : 840 (United States) Country Code : US (United States) Region Code : IL Region Name : Illinois City : Rockford Timezone : America/Chicago Coordinated Universal Time : -06:00 Daylight Saving Time : Yes National Significant Number Minimum Length : 10 Latitude : 42.2700 Longitude : -89.1000 ‹ previous : +1-779-(2002000...2002999) next › : +1-779-(2004000...2004999) Dialling Instructions For trunk calls: 0 779 2003000 (Trunk Code + National Destination Code + Subscriber Number) For international calls: 011 1 779 2003000 (International Prefix + International Dailing Code +National Destination Code + Subscriber Number) Telephone Number List 2003000 ~ 2003999 (Count: 1,000) Example: +1-779-2003000 / 0111-779-2003000 (1779-2003000 / 1-779-2003000) +1-779-2003001 / 0111-779-2003001 (1779-2003001 / 1-779-2003001) +1-779-2003002 / 0111-779-2003002 (1779-2003002 / 1-779-2003002) +1-779-2003003 / 0111-779-2003003 (1779-2003003 / 1-779-2003003) +1-779-2003004 / 0111-779-2003004 (1779-2003004 / 1-779-2003004) ...+1-779-xxxxxxx / 0111-779-xxxxxxx (1779-xxxxxxx / 1-779-xxxxxxx) ...+1-779-2003995 / 0111-779-2003995 (1779-2003995 / 1-779-2003995) +1-779-2003996 / 0111-779-2003996 (1779-2003996 / 1-779-2003996) +1-779-2003997 / 0111-779-2003997 (1779-2003997 / 1-779-2003997) +1-779-2003998 / 0111-779-2003998 (1779-2003998 / 1-779-2003998) +1-779-2003999 / 0111-779-2003999 (1779-2003999 / 1-779-2003999)