Area Code +81-503-(4820000...4829999) 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 : 4820000 Subscriber Number To : 4829999 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-(4810000...4819999) next › : +81-503-(4830000...4839999) Dialling Instructions For trunk calls: 0 503 4820000 (Trunk Code + National Destination Code + Subscriber Number) For international calls: 010 81 503 4820000 (International Prefix + International Dailing Code +National Destination Code + Subscriber Number) Telephone Number List 4820000 ~ 4829999 (Count: 10,000) Example: +81-503-4820000 / 01081-503-4820000 (0503-4820000 / 0-503-4820000) +81-503-4820001 / 01081-503-4820001 (0503-4820001 / 0-503-4820001) +81-503-4820002 / 01081-503-4820002 (0503-4820002 / 0-503-4820002) +81-503-4820003 / 01081-503-4820003 (0503-4820003 / 0-503-4820003) +81-503-4820004 / 01081-503-4820004 (0503-4820004 / 0-503-4820004) ...+81-503-xxxxxxx / 01081-503-xxxxxxx (0503-xxxxxxx / 0-503-xxxxxxx) ...+81-503-4829995 / 01081-503-4829995 (0503-4829995 / 0-503-4829995) +81-503-4829996 / 01081-503-4829996 (0503-4829996 / 0-503-4829996) +81-503-4829997 / 01081-503-4829997 (0503-4829997 / 0-503-4829997) +81-503-4829998 / 01081-503-4829998 (0503-4829998 / 0-503-4829998) +81-503-4829999 / 01081-503-4829999 (0503-4829999 / 0-503-4829999)