AS10554 WESTERNU-POMONA

The campus ASN of Western University of Health Sciences, a graduate health-professions university in Pomona, California. The handle WESTERNU-POMONA names both the institution and the city, which is unusually helpful.

What it's used for

A single-institution campus network. RIS sees 4 announced IPv4 prefixes carrying 1,024 addresses — 204.9.172.0/24 through 204.9.175.0/24, four contiguous /24s that together make a /22 — no IPv6, and three observed neighbours.

Three neighbours is a slightly richer connectivity picture than most small campuses show, and it is what you would expect from a university that wants its network to survive a provider outage: it is buying transit from more than one source rather than peering as a carrier. Nothing in the routing suggests any wholesale role. The addresses exist to serve the university's own students, faculty, clinics and administration.

Notable

Read the name carefully. "Western University" alone would be ambiguous, and there are unrelated institutions with similar names in other countries. This one is the Pomona health-sciences university, a private graduate school training osteopathic physicians, dentists, pharmacists, veterinarians and other clinical professions. The handle's -POMONA suffix is the part that disambiguates it.

Interesting

Announcing four separate /24s rather than the single covering /22 is a small operational choice with real consequences: it costs four slots in every routing table on the internet instead of one. It usually reflects blocks that were originally acquired or deployed separately and never aggregated.