Area Code +81-503-(1860000...1869999) 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 : 1860000 Subscriber Number To : 1869999 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 : KDDI 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-(1850000...1859999) next › : +81-503-(1870000...1879999) Dialling Instructions For trunk calls: 0 503 1860000 (Trunk Code + National Destination Code + Subscriber Number) For international calls: 010 81 503 1860000 (International Prefix + International Dailing Code +National Destination Code + Subscriber Number) Telephone Number List 1860000 ~ 1869999 (Count: 10,000) Example: +81-503-1860000 / 01081-503-1860000 (0503-1860000 / 0-503-1860000) +81-503-1860001 / 01081-503-1860001 (0503-1860001 / 0-503-1860001) +81-503-1860002 / 01081-503-1860002 (0503-1860002 / 0-503-1860002) +81-503-1860003 / 01081-503-1860003 (0503-1860003 / 0-503-1860003) +81-503-1860004 / 01081-503-1860004 (0503-1860004 / 0-503-1860004) ...+81-503-xxxxxxx / 01081-503-xxxxxxx (0503-xxxxxxx / 0-503-xxxxxxx) ...+81-503-1869995 / 01081-503-1869995 (0503-1869995 / 0-503-1869995) +81-503-1869996 / 01081-503-1869996 (0503-1869996 / 0-503-1869996) +81-503-1869997 / 01081-503-1869997 (0503-1869997 / 0-503-1869997) +81-503-1869998 / 01081-503-1869998 (0503-1869998 / 0-503-1869998) +81-503-1869999 / 01081-503-1869999 (0503-1869999 / 0-503-1869999)