Area Code +31-347-(370000...379999) located in Vianen, Utrecht (UT), more detail is as below. Place International Dialing Code : 31 International Prefix : 00 National Prefix : 0 National Destination Code : 347 Subscriber Number From : 370000 Subscriber Number To : 379999 National Destination Code Length : 3 Uses National Destination Code : Yes National Significant Number Length : 9 Number Type : G (Geographic Land Line, Fixed Line) Carrier Name : KPN B.V. Click here to buy Netherlands Area Code Database Other Information Language Code : nl (Dutch) Country Number : 528 (Netherlands) Country Code : NL (Netherlands) Region Code : UT Region Name : Utrecht City : Vianen Timezone : Europe/Amsterdam Coordinated Universal Time : +01:00 Daylight Saving Time : Yes National Significant Number Minimum Length : 9 Latitude : 51.9900 Longitude : 5.1000 ‹ previous : +31-347-(360000...369999) next › : +31-347-(470000...479999) Dialling Instructions For trunk calls: 0 347 370000 (Trunk Code + National Destination Code + Subscriber Number) For international calls: 00 31 347 370000 (International Prefix + International Dailing Code +National Destination Code + Subscriber Number) Telephone Number List 370000 ~ 379999 (Count: 10,000) Example: +31-347-370000 / 0031-347-370000 (0347-370000 / 0-347-370000) +31-347-370001 / 0031-347-370001 (0347-370001 / 0-347-370001) +31-347-370002 / 0031-347-370002 (0347-370002 / 0-347-370002) +31-347-370003 / 0031-347-370003 (0347-370003 / 0-347-370003) +31-347-370004 / 0031-347-370004 (0347-370004 / 0-347-370004) ...+31-347-xxxxxx / 0031-347-xxxxxx (0347-xxxxxx / 0-347-xxxxxx) ...+31-347-379995 / 0031-347-379995 (0347-379995 / 0-347-379995) +31-347-379996 / 0031-347-379996 (0347-379996 / 0-347-379996) +31-347-379997 / 0031-347-379997 (0347-379997 / 0-347-379997) +31-347-379998 / 0031-347-379998 (0347-379998 / 0-347-379998) +31-347-379999 / 0031-347-379999 (0347-379999 / 0-347-379999)