AS17509 — STARNET STARNET Co.,Ltd.

AS17509 announces 2 IPv4 prefixes covering 6,144 addresses and 1 IPv6 prefixes.

About this network

STARNET is the AS handle for StarNet Co.,Ltd., a Japanese network operator.

What it's used for

• The address space carries corporate infrastructure, evidenced by the reverse DNS entry snc-net34.starnet.ad.jp and netnames STAR-Internet-CIDR-BLK-JP and STARNET-1-CIDR-BLK-JP.
• The AS announces 6144 IPv4 addresses across 2 prefixes and 15 IPv6 prefixes, with only 3 observed neighbours, indicating a business or internal corporate estate rather than a transit provider.

Notable

• Registrants for both IPv4 prefixes are listed as Japan Network Information Center (JPNIC), which is consistent with the announcer being a Japanese entity holding space through the national registry.
• The inventory is dominated by a large IPv6 allocation (2404:3200::/46 and sub-blocks) alongside a modest IPv4 footprint, suggesting a modernized network with significant IPv6 deployment.

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

Announced prefixes

• 202.15.32.0/21
• 203.140.192.0/20
• 2404:3200::/32

Upstream networks

• AS2516 KDDI CORPORATION
• AS4725 SoftBank Corp.
• AS2519 ARTERIA Networks Corporation

Adjacent networks

• AS2516 KDDI CORPORATION
• AS4725 SoftBank Corp.
• AS2519 ARTERIA Networks Corporation