AS823

AS823 (UWO-AS) is an active, currently-announced autonomous system registered under ARIN to the University of Western Ontario — operating today as Western University — for its campus network in London, Ontario, Canada. It originates 24 IPv4 prefixes (65,792 addresses) and one IPv6 prefix, a live institutional network rather than a dormant or legacy registration.

ARIN's RDAP record shows AS823 was registered on 1994-03-11 and last changed on 2021-05-05, with status active. The RIR handle is UWO-AS, and the holder's IT organization — branded Western Technology Services, formerly Information Technology Services — publishes no dedicated ASN or peering-policy page on its own site (uwo.ca/its).

Per bgp.he.net, AS823 originates 129.100.0.0/16 (mostly IRR-valid) plus a smaller IPv4 /24 and one IPv6 /32 (2605:500::/32), flagged by that source as IRR Invalid due to an origin mismatch.

CAIDA's AS-relationship inference (asnDegree) shows AS823 with two providers and zero settlement-free peers or customers: AS819 (LARG*net, a Canadian regional research-and-education network) and AS13335 (Cloudflare) are AS823's two upstream/transit providers, not observed peers — bgp.tools independently lists both as upstreams. AS823 has no PeeringDB network record, so a formal peering relationship beyond these two upstreams is Unknown.

CAIDA places AS823 at global AS Rank 13,802, with a customer cone that is a singleton: 1 ASN, 24 prefixes, and 65,792 addresses — consistent with a network that has no downstream customers of its own.

RPKI coverage for AS823's own announcements is absent: a direct RIPEstat rpki-validation query returns "unknown" for both the IPv4 block 129.100.0.0/16 and the IPv6 block 2605:500::/32, meaning neither prefix currently has a published ROA — a confirmed gap in RPKI protection, not an unassessed one.

Operator

University of Western Ontario (Western University); IT organization branded Western Technology Services / ITS, London, Ontario, Canada; ARIN handle UWO-AS [Confirmed] — https://rdap.arin.net/registry/autnum/823, https://www.uwo.ca/its/

Country / RIR

Canada, ARIN [Confirmed] — https://rdap.arin.net/registry/autnum/823

Allocated

1994-03-11 (ARIN RDAP autnum top-level registration event); last changed 2021-05-05 [Confirmed] — https://rdap.arin.net/registry/autnum/823

Org status

active, ongoing operation; public university, ARIN record status active [Confirmed] — https://rdap.arin.net/registry/autnum/823, https://www.uwo.ca/its/

Contacts

abuse@uwo.ca, noc@uwo.ca; HQ 1393 Western Road, Rm SSB 4352, London, ON N6G-1G9, Canada [Confirmed] — https://stat.ripe.net/data/abuse-contact-finder/data.json?resource=AS823, https://rdap.arin.net/registry/entity/UWO-Z

Security/abuse context (NEUTRAL, DATED)

no notable public abuse signal found as of 2026-08-01; absence-of-evidence result — Spamhaus, AbuseIPDB, and NANOG archive checks were blocked or inconclusive to automated queries; bgp.he.net separately flags AS823 as having announced bogons (routing-hygiene, not a threat-feed listing) [Unknown for clean-bill confirmation; Likely for bogon flag] — https://bgp.he.net/AS823

Network & routing

Network type

campus/institutional network; 25 announced prefixes (24 IPv4 / 1 IPv6, 65,792 IPv4 addresses); no first-party "network type" statement found on uwo.ca [Confirmed for prefix counts; Likely for classification] — https://bgp.he.net/AS823

Size

24 IPv4 prefixes / 65,792 IPv4 addresses; 1 IPv6 prefix [Confirmed] — https://bgp.he.net/AS823

AS rank

13,802 (CAIDA AS Rank, queried 2026-08-05) [Confirmed] — https://api.asrank.caida.org/v2/restful/asns/823

Customer cone

singleton — 1 ASN, 24 prefixes, 65,792 addresses [Confirmed] — https://api.asrank.caida.org/v2/restful/asns/823

Routing/peering

two upstream/transit providers, AS819 (LARG*net) and AS13335 (Cloudflare), per CAIDA's asnDegree inference (customer 0, peer 0, provider 2) and independently corroborated by bgp.tools' upstream listing; no settlement-free peers; no PeeringDB network record for AS823, so a formal peering policy beyond these two upstream relationships is Unknown [Confirmed for provider identity/count; Unknown for formal policy] — https://api.asrank.caida.org/v2/restful/asns/823, https://bgp.tools/as/823, https://www.peeringdb.com/api/net?asn=823

RPKI

no ROA covers either announced block — RIPEstat rpki-validation returns status "unknown" for both 129.100.0.0/16 and 2605:500::/32 (queried 2026-08-05); bgp.he.net separately flags the IPv6 route 2605:500::/32 as IRR Invalid (origin mismatch) [Confirmed negative for RPKI; Likely for IRR flag] — https://stat.ripe.net/data/rpki-validation/data.json?resource=823&prefix=129.100.0.0/16, https://stat.ripe.net/data/rpki-validation/data.json?resource=823&prefix=2605:500::/32, https://bgp.he.net/AS823

Notable usage

originates 129.100.0.0/16 (mostly IRR-valid) plus a smaller IPv4 /24 and the IPv6 /32 noted above; serves as the campus network for University of Western Ontario [Likely] — https://bgp.he.net/AS823

Related ASNs

none confirmed for University of Western Ontario beyond AS823 itself; AS819 and AS13335 are upstream providers, not same-operator ASNs [Confirmed absence of evidence] — https://api.asrank.caida.org/v2/restful/asns/823

Analyst note

AS Rank (13,802), customer cone (singleton: 1 ASN / 24 prefixes / 65,792 addresses), and the degree profile (2 providers, 0 peers, 0 customers — AS819 and AS13335 are upstreams, not peers) are now confirmed via CAIDA AS Rank, corroborated by bgp.tools. RPKI validation queried directly against RIPEstat for both announced blocks returns "unknown" (no ROA published) for 129.100.0.0/16 and 2605:500::/32.