Area Code +44-5600-(850000...859999) located in VoIP, more detail is as below. Place International Dialing Code : 44 International Prefix : 00 National Prefix : 0 National Destination Code : 5600 Subscriber Number From : 850000 Subscriber Number To : 859999 National Destination Code Length : 4 Uses National Destination Code : Yes National Significant Number Length : 10 Number Type : V (VoIP, Location Independent fixed land line) Carrier Name : BT Click here to buy United Kingdom Area Code Database Other Information Language Code : en (English) Country Number : 826 (United Kingdom) Country Code : GB (United Kingdom) City : VoIP Timezone : Europe/London Coordinated Universal Time : +00:00 Daylight Saving Time : Yes National Significant Number Minimum Length : 10 Latitude : 51.5100 Longitude : -0.1300 ‹ previous : +44-5600-(840000...849999) next › : +44-5600-(860000...869999) Dialling Instructions For trunk calls: 0 5600 850000 (Trunk Code + National Destination Code + Subscriber Number) For international calls: 00 44 5600 850000 (International Prefix + International Dailing Code +National Destination Code + Subscriber Number) Telephone Number List 850000 ~ 859999 (Count: 10,000) Example: +44-5600-850000 / 0044-5600-850000 (05600-850000 / 0-5600-850000) +44-5600-850001 / 0044-5600-850001 (05600-850001 / 0-5600-850001) +44-5600-850002 / 0044-5600-850002 (05600-850002 / 0-5600-850002) +44-5600-850003 / 0044-5600-850003 (05600-850003 / 0-5600-850003) +44-5600-850004 / 0044-5600-850004 (05600-850004 / 0-5600-850004) ...+44-5600-xxxxxx / 0044-5600-xxxxxx (05600-xxxxxx / 0-5600-xxxxxx) ...+44-5600-859995 / 0044-5600-859995 (05600-859995 / 0-5600-859995) +44-5600-859996 / 0044-5600-859996 (05600-859996 / 0-5600-859996) +44-5600-859997 / 0044-5600-859997 (05600-859997 / 0-5600-859997) +44-5600-859998 / 0044-5600-859998 (05600-859998 / 0-5600-859998) +44-5600-859999 / 0044-5600-859999 (05600-859999 / 0-5600-859999)