Reputation · trust score
A transparent 0–100 signal. Every entity starts at a neutral baseline of 65; threat-intel blocklists, exposure, reverse-DNS, routing and allocation each adjust it up or down. Higher is more trustworthy.
- Baseline (neutral) 65
- Academic allocation +6
- Trust score 71 / 100
Experimental · trust-vectors model v1.1.0 — a transparent heuristic, not a definitive verdict. How it works →
About University of Western Ontario
The University of Western Ontario is a public research university in London, Ontario, Canada. The main campus is located on 455 hectares of land, surrounded by residential neighbourhoods and the Thames River bisecting the campus's eastern portion.
AS823 — global IP footprint
Cities where AS823 has measurable IPv4 allocation. Click any dot to open that city's page. Size and color scale with IP count.
Top CIDR ranges
| CIDR | IPs | PTR Density | Organization | Country | State | City |
|---|---|---|---|---|---|---|
| 129.100.0.0/16 | 65.5K |
41.3%
|
University of Western Ontario | CA | Ontario | London |
| 205.189.1.0/24 | 256 |
0.0%
|
University of Western Ontario | CA | — | — |
BGP Announced Prefixes
Live BGP anomalies →Prefixes AS823 actually originates in BGP, observed across our RIPE RIS collectors. This live routing view can differ from the registry allocation above.
| Prefix | Announcement samples | Last seen |
|---|---|---|
| 129.100.64.0/20 | 6,658 | 2026-07-23 17:53:20 |
| 129.100.128.0/18 | 6,650 | 2026-07-23 17:53:20 |
| 129.100.96.0/19 | 6,629 | 2026-07-23 17:53:20 |
| 129.100.0.0/18 | 6,626 | 2026-07-23 17:53:20 |
| 205.189.1.0/24 | 6,613 | 2026-07-23 17:53:20 |
| 129.100.224.0/19 | 6,605 | 2026-07-23 17:53:20 |
| 129.100.80.0/21 | 6,595 | 2026-07-23 17:53:20 |
| 129.100.0.0/16 | 6,366 | 2026-07-23 17:53:19 |
| 129.100.0.0/24 | 4,916 | 2026-07-23 17:50:49 |
| 129.100.216.0/23 | 1,574 | 2026-07-23 16:51:26 |
| 129.100.192.0/23 | 878 | 2026-07-23 16:51:26 |
| 129.100.200.0/23 | 796 | 2026-07-23 16:51:26 |
| 129.100.204.0/24 | 745 | 2026-07-23 16:51:26 |
| 129.100.208.0/23 | 730 | 2026-07-23 16:51:26 |
| 129.100.206.0/23 | 722 | 2026-07-23 16:51:26 |
| 129.100.202.0/23 | 717 | 2026-07-23 16:51:26 |
| 129.100.222.0/23 | 703 | 2026-07-23 16:51:26 |
| 129.100.196.0/23 | 690 | 2026-07-23 16:51:26 |
| 129.100.212.0/23 | 680 | 2026-07-23 16:51:26 |
| 129.100.198.0/23 | 680 | 2026-07-23 16:51:26 |
| 129.100.210.0/23 | 679 | 2026-07-23 16:51:26 |
| 129.100.220.0/23 | 678 | 2026-07-23 16:51:26 |
| 129.100.214.0/23 | 676 | 2026-07-23 16:51:26 |
| 129.100.219.0/24 | 674 | 2026-07-23 16:51:26 |
Frequently Asked Questions
What is AS823?
AS823 is an Autonomous System Number assigned to University of Western Ontario. An ASN identifies a network that controls a specific set of IP addresses and determines how traffic is routed across the internet via BGP (Border Gateway Protocol).
How many IP addresses does AS823 announce?
AS823 announces 65.8K IPv4 addresses distributed across 2 routed CIDR prefixes. The network is registered in Canada.
Who operates AS823?
AS823 is operated by University of Western Ontario. The organization is based in Canada. You can view all IP ranges and related ASNs on the organization page.
What country is AS823 registered in?
AS823 is registered in Canada. This indicates where the network operator is headquartered, though the IP addresses it announces may serve users globally.
