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 Ohio State University
The Ohio State University is a public research university in Columbus, Ohio, United States. Founded in 1870, it is the flagship institution of the University System of Ohio.
AS159 — global IP footprint
Cities where AS159 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 |
|---|---|---|---|---|---|---|
| 128.146.0.0/16 | 65.5K |
16.8%
|
Ohio State University | US | Ohio | Columbus |
| 140.254.0.0/16 | 65.5K |
10.8%
|
Ohio State University | US | Ohio | Mansfield |
| 164.107.0.0/16 | 65.5K |
18.3%
|
Ohio State University | US | Ohio | Columbus |
| 198.30.200.0/22 | 1.0K |
0.9%
|
Ohio State University | US | Ohio | Columbus |
| 192.12.205.0/24 | 256 |
0.0%
|
Ohio State University | US | — | — |
| 192.68.143.0/24 | 256 |
12.5%
|
Ohio State University | US | Ohio | Tipp City |
| 192.153.26.0/24 | 256 |
0.8%
|
Ohio State University | US | — | — |
BGP Announced Prefixes
Live BGP anomalies →Prefixes AS159 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 |
|---|---|---|
| 164.107.0.0/16 | 4,972 | 2026-07-22 13:20:39 |
| 140.254.0.0/16 | 4,863 | 2026-07-22 13:20:39 |
| 128.146.0.0/16 | 4,854 | 2026-07-22 13:20:39 |
| 198.30.200.0/22 | 4,836 | 2026-07-22 13:20:39 |
| 192.12.205.0/24 | 4,827 | 2026-07-22 13:20:39 |
| 192.153.26.0/24 | 4,823 | 2026-07-22 13:20:39 |
| 192.68.143.0/24 | 4,815 | 2026-07-22 13:20:39 |
Frequently Asked Questions
What is AS159?
AS159 is an Autonomous System Number assigned to Ohio State University. 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 AS159 announce?
AS159 announces 198.4K IPv4 addresses distributed across 7 routed CIDR prefixes. The network is registered in United States.
Who operates AS159?
AS159 is operated by Ohio State University. The organization is based in United States. You can view all IP ranges and related ASNs on the organization page.
What country is AS159 registered in?
AS159 is registered in United States. This indicates where the network operator is headquartered, though the IP addresses it announces may serve users globally.
