AS18
University of Texas at Austin
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 Texas at Austin
The University of Texas at Austin is a public research university in Austin, Texas, United States. Founded in 1883, it is the flagship institution of the University of Texas System.
AS18 — global IP footprint
Cities where AS18 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 |
|---|---|---|---|---|---|---|
| 128.62.0.0/16 | 65.5K |
91.0%
|
University of Texas at Austin | US | Texas | Austin |
| 128.83.0.0/16 | 65.5K |
36.4%
|
University of Texas at Austin | US | Texas | Austin |
| 129.116.0.0/16 | 65.5K |
26.5%
|
University of Texas at Austin | US | Texas | Manor |
| 146.6.0.0/16 | 65.5K |
37.6%
|
University of Texas at Austin | US | Texas | Austin |
| 198.213.192.0/18 | 16.4K |
0.0%
|
University of Texas at Austin | US | — | — |
| 206.76.64.0/18 | 16.4K |
70.9%
|
University of Texas at Austin | US | Texas | Austin |
| 198.214.80.0/20 | 4.1K |
62.5%
|
University of Texas at Austin | US | Texas | Austin |
| 198.214.250.0/23 | 512 |
0.2%
|
University of Texas at Austin | US | — | — |
BGP Announced Prefixes
Live BGP anomalies →Prefixes AS18 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 |
|---|---|---|
| 198.214.250.0/23 | 8,407 | 2026-07-18 10:51:58 |
| 206.76.64.0/18 | 7,203 | 2026-07-18 10:53:04 |
| 129.116.0.0/16 | 7,169 | 2026-07-18 10:53:04 |
| 128.83.0.0/16 | 7,101 | 2026-07-18 10:53:04 |
| 146.6.0.0/16 | 7,069 | 2026-07-18 10:53:04 |
| 198.213.192.0/18 | 7,000 | 2026-07-18 10:53:04 |
| 128.62.0.0/16 | 6,996 | 2026-07-18 10:53:04 |
| 198.214.80.0/20 | 4,346 | 2026-07-18 10:53:04 |
Frequently Asked Questions
What is AS18?
AS18 is an Autonomous System Number assigned to University of Texas at Austin. 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 AS18 announce?
AS18 announces 299.5K IPv4 addresses distributed across 8 routed CIDR prefixes. The network is registered in United States.
Who operates AS18?
AS18 is operated by University of Texas at Austin. The organization is based in United States. You can view all IP ranges and related ASNs on the organization page.
What country is AS18 registered in?
AS18 is registered in United States. This indicates where the network operator is headquartered, though the IP addresses it announces may serve users globally.
