AS23237 — MCMASTER - McMaster University

AS23237 announces 4 IPv4 prefixes covering 66,304 addresses and 1 IPv6 prefixes.

About this network

The AS handle MCMASTER is operated by McMaster University.

What it's used for

• The address space is registered under netnames MCMASTER, MACPHYS, and MACENG, all attributed to McMaster University, indicating a dedicated institutional network.
• The AS announces 66,048 IPv4 addresses across 10 prefixes and 1 IPv6 prefix, while maintaining only 2 observed routing neighbours, a ratio characteristic of an isolated academic or research network rather than a transit provider.

Notable

• All registrants in the evidence pack consistently identify McMaster University, aligning perfectly with the AS holder.
• The address inventory is finely subdivided into multiple prefixes within the 130.113.0.0/16 range, alongside two smaller /24 blocks, reflecting internal site-by-site segmentation typical of a large campus estate.

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

Announced prefixes

• 130.113.0.0/16
• 192.42.5.0/24
• 192.42.6.0/24
• 2604:1700::/48

Upstream networks

• AS26677 ORION
• AS7992 Cogeco Connexion Inc.

Adjacent networks

• AS26677 ORION
• AS7992 Cogeco Connexion Inc.

Routing security

• RPKI: 0 valid, 0 invalid and 5 not-found announcements; 0 ROAs.
• ASPA: none published.
• IRR: 80% of announcements registered; 5 route objects.
• Listed in as-sets: AS-549-AS-CUSTOMERS, AS-COGECO-TRANSIT, AS-COGECO-TRANSIT, AS-HURRICANEV6, AS-NEXICOM, AS26677:AS-GIGAPOP, AS26677:AS-GIGAPOP-PEERING, AS26677:AS-GIGAPOP4RPKIMON, AS26677:AS-ROG.