Area Code +81-503-(6450000...6459999) 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 : 6450000 Subscriber Number To : 6459999 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-(6440000...6449999) next › : +81-503-(6460000...6469999) Dialling Instructions For trunk calls: 0 503 6450000 (Trunk Code + National Destination Code + Subscriber Number) For international calls: 010 81 503 6450000 (International Prefix + International Dailing Code +National Destination Code + Subscriber Number) Telephone Number List 6450000 ~ 6459999 (Count: 10,000) Example: +81-503-6450000 / 01081-503-6450000 (0503-6450000 / 0-503-6450000) +81-503-6450001 / 01081-503-6450001 (0503-6450001 / 0-503-6450001) +81-503-6450002 / 01081-503-6450002 (0503-6450002 / 0-503-6450002) +81-503-6450003 / 01081-503-6450003 (0503-6450003 / 0-503-6450003) +81-503-6450004 / 01081-503-6450004 (0503-6450004 / 0-503-6450004) ...+81-503-xxxxxxx / 01081-503-xxxxxxx (0503-xxxxxxx / 0-503-xxxxxxx) ...+81-503-6459995 / 01081-503-6459995 (0503-6459995 / 0-503-6459995) +81-503-6459996 / 01081-503-6459996 (0503-6459996 / 0-503-6459996) +81-503-6459997 / 01081-503-6459997 (0503-6459997 / 0-503-6459997) +81-503-6459998 / 01081-503-6459998 (0503-6459998 / 0-503-6459998) +81-503-6459999 / 01081-503-6459999 (0503-6459999 / 0-503-6459999)