Area Code +1-210-(3990000...3990999) located in San Antonio, Texas (TX), more detail is as below. Place International Dialing Code : 1 International Prefix : 011 National Prefix : 1 National Destination Code : 210 Subscriber Number From : 3990000 Subscriber Number To : 3990999 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 - TX 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 : TX Region Name : Texas City : San Antonio Timezone : America/Chicago Coordinated Universal Time : -06:00 Daylight Saving Time : Yes National Significant Number Minimum Length : 10 Latitude : 29.4300 Longitude : -98.4800 ‹ previous : +1-210-(3989000...3989999) next › : +1-210-(3991000...3991999) Dialling Instructions For trunk calls: 0 210 3990000 (Trunk Code + National Destination Code + Subscriber Number) For international calls: 011 1 210 3990000 (International Prefix + International Dailing Code +National Destination Code + Subscriber Number) Telephone Number List 3990000 ~ 3990999 (Count: 1,000) Example: +1-210-3990000 / 0111-210-3990000 (1210-3990000 / 1-210-3990000) +1-210-3990001 / 0111-210-3990001 (1210-3990001 / 1-210-3990001) +1-210-3990002 / 0111-210-3990002 (1210-3990002 / 1-210-3990002) +1-210-3990003 / 0111-210-3990003 (1210-3990003 / 1-210-3990003) +1-210-3990004 / 0111-210-3990004 (1210-3990004 / 1-210-3990004) ...+1-210-xxxxxxx / 0111-210-xxxxxxx (1210-xxxxxxx / 1-210-xxxxxxx) ...+1-210-3990995 / 0111-210-3990995 (1210-3990995 / 1-210-3990995) +1-210-3990996 / 0111-210-3990996 (1210-3990996 / 1-210-3990996) +1-210-3990997 / 0111-210-3990997 (1210-3990997 / 1-210-3990997) +1-210-3990998 / 0111-210-3990998 (1210-3990998 / 1-210-3990998) +1-210-3990999 / 0111-210-3990999 (1210-3990999 / 1-210-3990999)