Area Code +1-203-(5161000...5161999) located in Ansonia-Derby, Connecticut (CT), more detail is as below. Place International Dialing Code : 1 International Prefix : 011 National Prefix : 1 National Destination Code : 203 Subscriber Number From : 5161000 Subscriber Number To : 5161999 National Destination Code Length : 3 Uses National Destination Code : Yes National Significant Number Length : 10 Number Type : M (Mobile, Cellular) Carrier Name : NEW CINGULAR WRLS DC 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 : CT Region Name : Connecticut City : Ansonia-Derby Timezone : America/New_York Coordinated Universal Time : -05:00 Daylight Saving Time : Yes National Significant Number Minimum Length : 10 Latitude : 41.3200 Longitude : -73.0900 ‹ previous : +1-203-(5160000...5160999) next › : +1-203-(5162000...5162999) Dialling Instructions For trunk calls: 0 203 5161000 (Trunk Code + National Destination Code + Subscriber Number) For international calls: 011 1 203 5161000 (International Prefix + International Dailing Code +National Destination Code + Subscriber Number) Telephone Number List 5161000 ~ 5161999 (Count: 1,000) Example: +1-203-5161000 / 0111-203-5161000 (1203-5161000 / 1-203-5161000) +1-203-5161001 / 0111-203-5161001 (1203-5161001 / 1-203-5161001) +1-203-5161002 / 0111-203-5161002 (1203-5161002 / 1-203-5161002) +1-203-5161003 / 0111-203-5161003 (1203-5161003 / 1-203-5161003) +1-203-5161004 / 0111-203-5161004 (1203-5161004 / 1-203-5161004) ...+1-203-xxxxxxx / 0111-203-xxxxxxx (1203-xxxxxxx / 1-203-xxxxxxx) ...+1-203-5161995 / 0111-203-5161995 (1203-5161995 / 1-203-5161995) +1-203-5161996 / 0111-203-5161996 (1203-5161996 / 1-203-5161996) +1-203-5161997 / 0111-203-5161997 (1203-5161997 / 1-203-5161997) +1-203-5161998 / 0111-203-5161998 (1203-5161998 / 1-203-5161998) +1-203-5161999 / 0111-203-5161999 (1203-5161999 / 1-203-5161999)