AS15158 — ALGOMAU-SSM

AS15158 announces 2 IPv4 prefixes covering 768 addresses and 0 IPv6 prefixes.

About this network

Two adjacent blocks announced separately rather than as one.

What it's used for

• A university network. Two IPv4 prefixes announced from Canada, no IPv6, and three observed BGP neighbours.

Notable

• The two prefixes are adjacent, a /24 sitting immediately below a /23 in the same range, and they are announced as two routes rather than combined.
• Both carry the same netname and the same registrant, so nothing in the registry separates them.
• The AS handle appends a three-letter site code to the university's short name, a code that appears in no other field.
• Six addresses were queried for reverse DNS and none returned a name.
• The routing history begins in 2007, much later than the AS number would suggest.

Interesting

• Announcing two adjacent blocks separately rather than as one covering prefix is a small choice with a real cost: two entries in every routing table that carries them, forever, to describe contiguous space. It usually means the blocks were assigned at different times and nobody revisited the configuration.
• A late first-seen date on a low AS number means the number sat unused, or was used where no collector watched, before this network started announcing. The number implies an age the routing does not support.
• Seven hundred addresses and three upstreams for a whole university is a small footprint, which fits an institution whose research network reaches it through one of those upstreams rather than directly.

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

Announced prefixes

• 199.212.53.0/24
• 199.212.54.0/23

Upstream networks

• AS6327 Shaw Communications
• AS577 Bell Canada
• AS26677 ORION

Adjacent networks

• AS6327 Shaw Communications
• AS577 Bell Canada
• AS26677 ORION

Routing security

• RPKI: 3 valid, 0 invalid and 0 not-found announcements; 2 ROAs.
• ASPA: none published.
• IRR: 33% of announcements registered; 4 route objects.
• Listed in as-sets: AS-549-AS-CUSTOMERS, AS-NEXICOM, AS-VIANET-CA, AS26677:AS-GIGAPOP, AS26677:AS-GIGAPOP-PEERING, AS26677:AS-GIGAPOP4RPKIMON, AS855:AS-CUSTOMERS.