AS17689 — H-IX - Hokuden Information Technology,Inc.

AS17689 announces 5 IPv4 prefixes covering 9,728 addresses and 1 IPv6 prefixes.

About this network

The AS handle H-IX is held by Hokuden Information Technology, Inc.

What it's used for

• The address space carries residential and business internet access, evidenced by the netname IST-HOKKAIDO-CIDR-BLK-JP on four of the five announced IPv4 prefixes and the reverse DNS record i254.placo.net.
• With 9,728 IPv4 addresses announced across 5 prefixes and only 2 observed neighbours, the ratio indicates an access network serving end-users rather than a transit provider.

Notable

• All registrants for the announced prefixes are listed as Japan Network Information Center (JPNIC) with the IRT IRT-JPNIC-JP, which is consistent with the holder being a Japanese ISP operating under JPNIC allocation.
• The inventory includes a single IPv6 prefix 2405:7800::/32 alongside the IPv4 space, indicating dual-stack capability.
• The address inventory is composed of five distinct IPv4 blocks, with the largest being 61.198.16.0/20 and the smallest 202.220.70.0/23.

This description is AI-generated, best-effort context — not authoritative, and provided without any guarantee of accuracy.

Announced prefixes

• 27.96.72.0/21
• 27.96.80.0/22
• 61.198.16.0/20
• 202.177.32.0/21
• 202.220.70.0/23
• 2405:7800::/32

Upstream networks

• AS2497 Internet Initiative Japan Inc.
• AS4713 NTT DOCOMO BUSINESS,Inc.

Adjacent networks

• AS2497 Internet Initiative Japan Inc.
• AS4713 NTT DOCOMO BUSINESS,Inc.

Routing security

• RPKI: 0 valid, 0 invalid and 6 not-found announcements; 0 ROAs.
• ASPA: none published.
• IRR: 100% of announcements registered; 6 route objects.
• Listed in as-sets: AS-BBX-PEERS, AS-GIGAINFRA, AS-GIGAINFRA-V6, AS-IIJ, AS-IIJ6, AS-INFOSPHERE, AS-INFOSPHERE-V6, AS-KDD, AS-KDDI6, AS-OCN, AS-OCN, AS-OCN-V6, AS-OCN-V6, AS-PACNET-CUSTOMER-PROXY-REGISTER, AS-TMNET-PEERS, AS-XO-B, AS2497:AS-IIJ, AS2497:AS-IIJ6.

Internet exchanges

• JPIX Tokyo — Tokyo, Japan