Area Code +81-503-(4930000...4939999) 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 : 4930000 Subscriber Number To : 4939999 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-(4920000...4929999) next › : +81-503-(4940000...4949999) Dialling Instructions For trunk calls: 0 503 4930000 (Trunk Code + National Destination Code + Subscriber Number) For international calls: 010 81 503 4930000 (International Prefix + International Dailing Code +National Destination Code + Subscriber Number) Telephone Number List 4930000 ~ 4939999 (Count: 10,000) Example: +81-503-4930000 / 01081-503-4930000 (0503-4930000 / 0-503-4930000) +81-503-4930001 / 01081-503-4930001 (0503-4930001 / 0-503-4930001) +81-503-4930002 / 01081-503-4930002 (0503-4930002 / 0-503-4930002) +81-503-4930003 / 01081-503-4930003 (0503-4930003 / 0-503-4930003) +81-503-4930004 / 01081-503-4930004 (0503-4930004 / 0-503-4930004) ...+81-503-xxxxxxx / 01081-503-xxxxxxx (0503-xxxxxxx / 0-503-xxxxxxx) ...+81-503-4939995 / 01081-503-4939995 (0503-4939995 / 0-503-4939995) +81-503-4939996 / 01081-503-4939996 (0503-4939996 / 0-503-4939996) +81-503-4939997 / 01081-503-4939997 (0503-4939997 / 0-503-4939997) +81-503-4939998 / 01081-503-4939998 (0503-4939998 / 0-503-4939998) +81-503-4939999 / 01081-503-4939999 (0503-4939999 / 0-503-4939999)