AS7503 Air Internet Service Co.,Ltd.

AIR - Air Internet Service Co.,Ltd. · registered in Japan

IPv4 addresses16,3842 prefixes · <0.001% of announced IPv4

Rank in Japan#269largest network in JP by IPv4 space, of 724 · 0.01% of JP

Rank worldwide#6,883of 79,396 networks with IPv4

IPv61 x /32 (65,536 x /48)15 prefixes

CountryJapan745 ASNs registered there

Open AS7503 in ASN lookup Look up an IP in this network (210.159.64.1) All networks in Japan

IPv4 prefixes

All 2 prefixes, in address order.

210.159.64.0/19
210.166.64.0/19

IPv6 prefixes

All 15 prefixes.

2402:3800::/33
2402:3800:8000::/34
2402:3800:c000::/36
2402:3800:d000::/37
2402:3800:d800::/38
2402:3800:dc00::/46
2402:3800:dc04::/46
2402:3800:dc08::/45
2402:3800:dc10::/44
2402:3800:dc20::/43
2402:3800:dc40::/42
2402:3800:dc80::/41
2402:3800:dd00::/40
2402:3800:de00::/39
2402:3800:e000::/35

Similar-sized networks in Japan

ASNNameIPv4 addresses

AS55381#266 CCSNET - CITY-CABLE SHUNAN Corporation17,920

AS131952#267 POTATO-NET - Asahikawa Cable Television Co., Ltd.17,920

AS152875#268 MEEQ - MEEQ Inc.16,896

AS9618#270 TCN - catv-tokushima16,384

AS17683#271 WINTECH-COM - Wingtechnology Communications, Inc.16,384

AS23780#272 CTB - CTB Media Inc.16,384

IP-to-ASN data: iptoasn.com (public domain). Snapshot downloaded 2026-11-11, refreshed daily. Ranges are what each network announces in BGP, not registry allocations. Data sources