Area Code +81-503-(5930000...5939999) located in VoIP, more detail is as below. Place International Dialing Code : 81 International Prefix : 010 National Prefix : 0 National Destination Code : 503 Subscriber Number From : 5930000 Subscriber Number To : 5939999 National Destination Code Length : 3 Uses National Destination Code : Yes National Significant Number Length : 10 Number Type : V (VoIP, Location Independent fixed land line) Carrier Name : NTT Communications Click here to buy Japan Area Code Database Other Information Language Code : ja (Japanese) Country Number : 392 (Japan) Country Code : JP (Japan) City : VoIP Timezone : Asia/Tokyo Coordinated Universal Time : +09:00 Daylight Saving Time : No National Significant Number Minimum Length : 10 Latitude : None Longitude : None ‹ previous : +81-503-(5920000...5929999) next › : +81-503-(5940000...5949999) Dialling Instructions For trunk calls: 0 503 5930000 (Trunk Code + National Destination Code + Subscriber Number) For international calls: 010 81 503 5930000 (International Prefix + International Dailing Code +National Destination Code + Subscriber Number) Telephone Number List 5930000 ~ 5939999 (Count: 10,000) Example: +81-503-5930000 / 01081-503-5930000 (0503-5930000 / 0-503-5930000) +81-503-5930001 / 01081-503-5930001 (0503-5930001 / 0-503-5930001) +81-503-5930002 / 01081-503-5930002 (0503-5930002 / 0-503-5930002) +81-503-5930003 / 01081-503-5930003 (0503-5930003 / 0-503-5930003) +81-503-5930004 / 01081-503-5930004 (0503-5930004 / 0-503-5930004) ...+81-503-xxxxxxx / 01081-503-xxxxxxx (0503-xxxxxxx / 0-503-xxxxxxx) ...+81-503-5939995 / 01081-503-5939995 (0503-5939995 / 0-503-5939995) +81-503-5939996 / 01081-503-5939996 (0503-5939996 / 0-503-5939996) +81-503-5939997 / 01081-503-5939997 (0503-5939997 / 0-503-5939997) +81-503-5939998 / 01081-503-5939998 (0503-5939998 / 0-503-5939998) +81-503-5939999 / 01081-503-5939999 (0503-5939999 / 0-503-5939999)