Area Code +81-503-(5130000...5139999) 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 : 5130000 Subscriber Number To : 5139999 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-(5120000...5129999) next › : +81-503-(5140000...5149999) Dialling Instructions For trunk calls: 0 503 5130000 (Trunk Code + National Destination Code + Subscriber Number) For international calls: 010 81 503 5130000 (International Prefix + International Dailing Code +National Destination Code + Subscriber Number) Telephone Number List 5130000 ~ 5139999 (Count: 10,000) Example: +81-503-5130000 / 01081-503-5130000 (0503-5130000 / 0-503-5130000) +81-503-5130001 / 01081-503-5130001 (0503-5130001 / 0-503-5130001) +81-503-5130002 / 01081-503-5130002 (0503-5130002 / 0-503-5130002) +81-503-5130003 / 01081-503-5130003 (0503-5130003 / 0-503-5130003) +81-503-5130004 / 01081-503-5130004 (0503-5130004 / 0-503-5130004) ...+81-503-xxxxxxx / 01081-503-xxxxxxx (0503-xxxxxxx / 0-503-xxxxxxx) ...+81-503-5139995 / 01081-503-5139995 (0503-5139995 / 0-503-5139995) +81-503-5139996 / 01081-503-5139996 (0503-5139996 / 0-503-5139996) +81-503-5139997 / 01081-503-5139997 (0503-5139997 / 0-503-5139997) +81-503-5139998 / 01081-503-5139998 (0503-5139998 / 0-503-5139998) +81-503-5139999 / 01081-503-5139999 (0503-5139999 / 0-503-5139999)