Area Code +1-240-(2473000...2473999) located in Silver Spring, Maryland (MD), more detail is as below. Place International Dialing Code : 1 International Prefix : 011 National Prefix : 1 National Destination Code : 240 Subscriber Number From : 2473000 Subscriber Number To : 2473999 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 : ALLEGIANCE TELCOM MD 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 : MD Region Name : Maryland City : Silver Spring Timezone : America/New_York Coordinated Universal Time : -05:00 Daylight Saving Time : Yes National Significant Number Minimum Length : 10 Latitude : 39.0100 Longitude : -77.0400 ‹ previous : +1-240-(2472000...2472999) next › : +1-240-(2474000...2474999) Dialling Instructions For trunk calls: 0 240 2473000 (Trunk Code + National Destination Code + Subscriber Number) For international calls: 011 1 240 2473000 (International Prefix + International Dailing Code +National Destination Code + Subscriber Number) Telephone Number List 2473000 ~ 2473999 (Count: 1,000) Example: +1-240-2473000 / 0111-240-2473000 (1240-2473000 / 1-240-2473000) +1-240-2473001 / 0111-240-2473001 (1240-2473001 / 1-240-2473001) +1-240-2473002 / 0111-240-2473002 (1240-2473002 / 1-240-2473002) +1-240-2473003 / 0111-240-2473003 (1240-2473003 / 1-240-2473003) +1-240-2473004 / 0111-240-2473004 (1240-2473004 / 1-240-2473004) ...+1-240-xxxxxxx / 0111-240-xxxxxxx (1240-xxxxxxx / 1-240-xxxxxxx) ...+1-240-2473995 / 0111-240-2473995 (1240-2473995 / 1-240-2473995) +1-240-2473996 / 0111-240-2473996 (1240-2473996 / 1-240-2473996) +1-240-2473997 / 0111-240-2473997 (1240-2473997 / 1-240-2473997) +1-240-2473998 / 0111-240-2473998 (1240-2473998 / 1-240-2473998) +1-240-2473999 / 0111-240-2473999 (1240-2473999 / 1-240-2473999)