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 Illinois Urbana-Champaign
The University of Illinois Urbana-Champaign is a public land-grant research university in the Champaign–Urbana metropolitan area, Illinois, United States. Established in 1867, it is the founding campus and flagship institution of the University of Illinois System.
AS38 — global IP footprint
Cities where AS38 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 |
|---|---|---|---|---|---|---|
| 128.174.0.0/16 | 65.5K |
38.9%
|
University of Illinois | US | Illinois | Champaign |
| 130.126.0.0/16 | 65.5K |
55.1%
|
University of Illinois | US | Illinois | Champaign |
| 192.17.0.0/16 | 65.5K |
23.8%
|
University of Illinois | US | Illinois | Champaign |
| 72.36.64.0/19 | 8.2K |
9.1%
|
University of Illinois | US | — | — |
| 72.36.96.0/20 | 4.1K |
0.2%
|
University of Illinois | US | — | — |
| 72.36.112.0/21 | 2.0K |
3.4%
|
University of Illinois | US | Illinois | Urbana |
BGP Announced Prefixes
Live BGP anomalies →Prefixes AS38 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 |
|---|---|---|
| 72.36.64.0/18 | 7,095 | 2026-07-19 03:52:02 |
| 130.126.0.0/16 | 6,936 | 2026-07-19 03:52:27 |
| 128.174.0.0/16 | 6,917 | 2026-07-19 03:52:27 |
| 192.17.0.0/16 | 6,898 | 2026-07-19 03:52:27 |
| 72.36.80.0/23 | 70 | 2026-07-17 06:34:56 |
| 72.36.96.0/20 | 70 | 2026-07-17 06:34:56 |
| 72.36.97.0/26 | 21 | 2026-07-12 02:40:03 |
Frequently Asked Questions
What is AS38?
AS38 is an Autonomous System Number assigned to University of Illinois. 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 AS38 announce?
AS38 announces 210.9K IPv4 addresses distributed across 6 routed CIDR prefixes. The network is registered in United States.
Who operates AS38?
AS38 is operated by University of Illinois. The organization is based in United States. You can view all IP ranges and related ASNs on the organization page.
What country is AS38 registered in?
AS38 is registered in United States. This indicates where the network operator is headquartered, though the IP addresses it announces may serve users globally.
