AS58647 — KAGAWAU-AS - Kagawa University

AS58647 announces 2 IPv4 prefixes covering 73,728 addresses and 0 IPv6 prefixes.

About this network

The AS handle KAGAWAU-AS is held by Kagawa University, a national university located in Takamatsu, Kagawa, Japan.

What it's used for

• The address space is registered under netnames JPNIC-NET-JP-ERX and KAGAWAU-NET-CIDR-BLK-JP, with registrants listed as the Japan Network Information Center (JPNIC).
• The AS announces 73,728 IPv4 addresses across 50 prefixes, while maintaining only 2 observed routing neighbours. This high address-to-neighbour ratio indicates an internal institutional network rather than a transit or access provider.
• Traffic from this AS consists of research, academic, and administrative endpoints for the university's faculty, students, and staff.

Notable

• Registrants for the majority of prefixes are listed as the Japan Network Information Center (JPNIC), which is consistent with the standard allocation process for Japanese educational institutions.
• The address inventory is heavily subdivided into /20, /21, and /22 blocks, reflecting a segmented internal network structure typical of a large university campus.
• The AS was first seen in routing tables in 2012, indicating a relatively recent establishment of its autonomous system.

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

Announced prefixes

• 133.92.0.0/16
• 202.252.64.0/19

Upstream networks

• AS2907 Research Organization of Information and Systems, National Institute of Informatics
• AS7522 STNet, Incorporated

Adjacent networks

• AS2907 Research Organization of Information and Systems, National Institute of Informatics
• AS7522 STNet, Incorporated

Routing security

• RPKI: 0 valid, 0 invalid and 185 not-found announcements; 0 ROAs.
• ASPA: none published.
• IRR: 1% of announcements registered; 3 route objects.
• Listed in as-sets: AS-GIGAINFRA, AS-IIJ, AS-IIJ6, AS-KDD, AS-KDDI6, AS-MESH-CUSTOMER:AS10010, AS-OCN, AS-OCN, AS-PACNET-DOWNSTREAM-JP, AS-STCN, AS-TELSTRA-INTL-CUSTOMERS, AS-TOKAI, AS-VECTANT, AS20965:AS-FROM-TEIN-TO-GEANT, AS2497:AS-IIJ, AS2497:AS-IIJ6.