Area Code +44-300-(0120000...0129999) located in National Number, more detail is as below. Place International Dialing Code : 44 International Prefix : 00 National Prefix : 0 National Destination Code : 300 Subscriber Number From : 0120000 Subscriber Number To : 0129999 National Destination Code Length : 3 Uses National Destination Code : Yes National Significant Number Length : 10 Number Type : N (N) Carrier Name : Windsor Telecom Plc 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 : National Number Timezone : Europe/London Coordinated Universal Time : +00:00 Daylight Saving Time : Yes National Significant Number Minimum Length : 10 Latitude : 51.5000 Longitude : -0.1300 ‹ previous : +44-300-(0110000...0119999) next › : +44-300-(0130000...0139999) Dialling Instructions For trunk calls: 0 300 0120000 (Trunk Code + National Destination Code + Subscriber Number) For international calls: 00 44 300 0120000 (International Prefix + International Dailing Code +National Destination Code + Subscriber Number) Telephone Number List 0120000 ~ 0129999 (Count: 10,000) Example: +44-300-0120000 / 0044-300-0120000 (0300-0120000 / 0-300-0120000) +44-300-0120001 / 0044-300-0120001 (0300-0120001 / 0-300-0120001) +44-300-0120002 / 0044-300-0120002 (0300-0120002 / 0-300-0120002) +44-300-0120003 / 0044-300-0120003 (0300-0120003 / 0-300-0120003) +44-300-0120004 / 0044-300-0120004 (0300-0120004 / 0-300-0120004) ...+44-300-xxxxxxx / 0044-300-xxxxxxx (0300-xxxxxxx / 0-300-xxxxxxx) ...+44-300-0129995 / 0044-300-0129995 (0300-0129995 / 0-300-0129995) +44-300-0129996 / 0044-300-0129996 (0300-0129996 / 0-300-0129996) +44-300-0129997 / 0044-300-0129997 (0300-0129997 / 0-300-0129997) +44-300-0129998 / 0044-300-0129998 (0300-0129998 / 0-300-0129998) +44-300-0129999 / 0044-300-0129999 (0300-0129999 / 0-300-0129999)