Area Code +44-5603-(600000...609999) 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 : 600000 Subscriber Number To : 609999 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 : Net-Work Internet Ltd 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-(580000...589999) next › : +44-5603-(610000...619999) Dialling Instructions For trunk calls: 0 5603 600000 (Trunk Code + National Destination Code + Subscriber Number) For international calls: 00 44 5603 600000 (International Prefix + International Dailing Code +National Destination Code + Subscriber Number) Telephone Number List 600000 ~ 609999 (Count: 10,000) Example: +44-5603-600000 / 0044-5603-600000 (05603-600000 / 0-5603-600000) +44-5603-600001 / 0044-5603-600001 (05603-600001 / 0-5603-600001) +44-5603-600002 / 0044-5603-600002 (05603-600002 / 0-5603-600002) +44-5603-600003 / 0044-5603-600003 (05603-600003 / 0-5603-600003) +44-5603-600004 / 0044-5603-600004 (05603-600004 / 0-5603-600004) ...+44-5603-xxxxxx / 0044-5603-xxxxxx (05603-xxxxxx / 0-5603-xxxxxx) ...+44-5603-609995 / 0044-5603-609995 (05603-609995 / 0-5603-609995) +44-5603-609996 / 0044-5603-609996 (05603-609996 / 0-5603-609996) +44-5603-609997 / 0044-5603-609997 (05603-609997 / 0-5603-609997) +44-5603-609998 / 0044-5603-609998 (05603-609998 / 0-5603-609998) +44-5603-609999 / 0044-5603-609999 (05603-609999 / 0-5603-609999)