Area Code +44-5603-(990000...999999) located in VoIP, more detail is as below. Place International Dialing Code : 44 International Prefix : 00 National Prefix : 0 National Destination Code : 5603 Subscriber Number From : 990000 Subscriber Number To : 999999 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 : Eclipse Tel Limited 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 : +44-5603-(930000...939999) next › : +44-7000-(000000...099999) Dialling Instructions For trunk calls: 0 5603 990000 (Trunk Code + National Destination Code + Subscriber Number) For international calls: 00 44 5603 990000 (International Prefix + International Dailing Code +National Destination Code + Subscriber Number) Telephone Number List 990000 ~ 999999 (Count: 10,000) Example: +44-5603-990000 / 0044-5603-990000 (05603-990000 / 0-5603-990000) +44-5603-990001 / 0044-5603-990001 (05603-990001 / 0-5603-990001) +44-5603-990002 / 0044-5603-990002 (05603-990002 / 0-5603-990002) +44-5603-990003 / 0044-5603-990003 (05603-990003 / 0-5603-990003) +44-5603-990004 / 0044-5603-990004 (05603-990004 / 0-5603-990004) ...+44-5603-xxxxxx / 0044-5603-xxxxxx (05603-xxxxxx / 0-5603-xxxxxx) ...+44-5603-999995 / 0044-5603-999995 (05603-999995 / 0-5603-999995) +44-5603-999996 / 0044-5603-999996 (05603-999996 / 0-5603-999996) +44-5603-999997 / 0044-5603-999997 (05603-999997 / 0-5603-999997) +44-5603-999998 / 0044-5603-999998 (05603-999998 / 0-5603-999998) +44-5603-999999 / 0044-5603-999999 (05603-999999 / 0-5603-999999)