AS13998
University of Texas Southwestern Medical Center
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 v1.2.0 — a transparent heuristic, not a definitive verdict. How it works →
Top CIDR ranges
| CIDR | IPs | PTR Density | Organization | Country | State | City |
|---|---|---|---|---|---|---|
| 129.112.0.0/16 | 65.5K |
18.5%
|
University of Texas Southwestern Medical Center | US | Texas | Dallas |
| 198.215.48.0/20 | 4.1K |
0.0%
|
University of Texas Southwestern Medical Center | US | — | — |
| 198.215.96.0/20 | 4.1K |
0.0%
|
University of Texas Southwestern Medical Center | US | — | — |
| 198.215.176.0/20 | 4.1K |
0.0%
|
University of Texas Southwestern Medical Center | US | — | — |
| 198.241.16.0/20 | 4.1K |
0.0%
|
University of Texas Southwestern Medical Center | US | — | — |
| 198.215.36.0/22 | 1.0K |
0.0%
|
University of Texas Southwestern Medical Center | US | — | — |
| 199.242.236.0/22 | 1.0K |
43.4%
|
University of Texas Southwestern Medical Center | US | — | — |
| 199.165.152.0/23 | 512 |
27.1%
|
University of Texas Southwestern Medical Center | US | — | — |
| 199.242.234.0/23 | 512 |
37.1%
|
University of Texas Southwestern Medical Center | US | — | — |
| 199.165.154.0/24 | 256 |
2.7%
|
University of Texas Southwestern Medical Center | US | Texas | Dallas |
| 199.249.214.0/24 | 256 |
0.0%
|
University of Texas Southwestern Medical Center | US | — | — |
BGP Announced Prefixes
Live BGP anomalies →Prefixes AS13998 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 |
|---|---|---|
| 129.112.115.0/24 | 31,336 | 2026-09-12 17:39:42 |
| 129.112.109.0/24 | 31,267 | 2026-09-12 17:39:42 |
| 129.112.0.0/16 | 29,319 | 2026-09-12 17:39:42 |
| 199.242.236.0/22 | 27,205 | 2026-09-12 17:39:58 |
| 198.241.16.0/20 | 27,077 | 2026-09-12 17:39:58 |
| 198.215.176.0/20 | 27,047 | 2026-09-12 17:39:58 |
| 198.215.96.0/20 | 27,036 | 2026-09-12 17:39:58 |
| 199.249.214.0/24 | 27,011 | 2026-09-12 17:39:58 |
| 198.215.48.0/20 | 27,011 | 2026-09-12 17:39:58 |
| 199.242.234.0/23 | 27,010 | 2026-09-12 17:39:58 |
| 198.215.36.0/22 | 26,997 | 2026-09-12 17:39:58 |
| 199.165.152.0/23 | 26,847 | 2026-09-12 17:39:58 |
| 199.165.154.0/24 | 25,571 | 2026-09-12 17:39:58 |
Frequently Asked Questions
What is AS13998?
AS13998 is an Autonomous System Number assigned to University of Texas Southwestern Medical Center. 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 AS13998 announce?
AS13998 announces 85.5K IPv4 addresses distributed across 11 routed CIDR prefixes. The network is registered in United States.
Who operates AS13998?
AS13998 is operated by University of Texas Southwestern Medical Center. The organization is based in United States. You can view all IP ranges and related ASNs on the organization page.
What country is AS13998 registered in?
AS13998 is registered in United States. This indicates where the network operator is headquartered, though the IP addresses it announces may serve users globally.
