Area Code +1-240-(4890000...4890999) located in Poolesville, 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 : 4890000 Subscriber Number To : 4890999 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 : XO MARYLAND LLC 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 : Poolesville Timezone : America/New_York Coordinated Universal Time : -05:00 Daylight Saving Time : Yes National Significant Number Minimum Length : 10 Latitude : 39.1400 Longitude : -77.4200 ‹ previous : +1-240-(4881000...4881999) next › : +1-240-(4891000...4891999) Dialling Instructions For trunk calls: 0 240 4890000 (Trunk Code + National Destination Code + Subscriber Number) For international calls: 011 1 240 4890000 (International Prefix + International Dailing Code +National Destination Code + Subscriber Number) Telephone Number List 4890000 ~ 4890999 (Count: 1,000) Example: +1-240-4890000 / 0111-240-4890000 (1240-4890000 / 1-240-4890000) +1-240-4890001 / 0111-240-4890001 (1240-4890001 / 1-240-4890001) +1-240-4890002 / 0111-240-4890002 (1240-4890002 / 1-240-4890002) +1-240-4890003 / 0111-240-4890003 (1240-4890003 / 1-240-4890003) +1-240-4890004 / 0111-240-4890004 (1240-4890004 / 1-240-4890004) ...+1-240-xxxxxxx / 0111-240-xxxxxxx (1240-xxxxxxx / 1-240-xxxxxxx) ...+1-240-4890995 / 0111-240-4890995 (1240-4890995 / 1-240-4890995) +1-240-4890996 / 0111-240-4890996 (1240-4890996 / 1-240-4890996) +1-240-4890997 / 0111-240-4890997 (1240-4890997 / 1-240-4890997) +1-240-4890998 / 0111-240-4890998 (1240-4890998 / 1-240-4890998) +1-240-4890999 / 0111-240-4890999 (1240-4890999 / 1-240-4890999)