Area Code +81-503-(3350000...3359999) 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 : 3350000 Subscriber Number To : 3359999 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-(3340000...3349999) next › : +81-503-(3360000...3369999) Dialling Instructions For trunk calls: 0 503 3350000 (Trunk Code + National Destination Code + Subscriber Number) For international calls: 010 81 503 3350000 (International Prefix + International Dailing Code +National Destination Code + Subscriber Number) Telephone Number List 3350000 ~ 3359999 (Count: 10,000) Example: +81-503-3350000 / 01081-503-3350000 (0503-3350000 / 0-503-3350000) +81-503-3350001 / 01081-503-3350001 (0503-3350001 / 0-503-3350001) +81-503-3350002 / 01081-503-3350002 (0503-3350002 / 0-503-3350002) +81-503-3350003 / 01081-503-3350003 (0503-3350003 / 0-503-3350003) +81-503-3350004 / 01081-503-3350004 (0503-3350004 / 0-503-3350004) ...+81-503-xxxxxxx / 01081-503-xxxxxxx (0503-xxxxxxx / 0-503-xxxxxxx) ...+81-503-3359995 / 01081-503-3359995 (0503-3359995 / 0-503-3359995) +81-503-3359996 / 01081-503-3359996 (0503-3359996 / 0-503-3359996) +81-503-3359997 / 01081-503-3359997 (0503-3359997 / 0-503-3359997) +81-503-3359998 / 01081-503-3359998 (0503-3359998 / 0-503-3359998) +81-503-3359999 / 01081-503-3359999 (0503-3359999 / 0-503-3359999)