AS25
University of California at Berkeley
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 California, Berkeley
The University of California, Berkeley is a public land-grant research university in the Southside and Northside neighborhoods of Berkeley, California, United States. Founded in 1868 and named after the Anglo-Irish philosopher George Berkeley, it is the state's first land-grant university and the founding campus of the University of California system.
Top CIDR ranges
| CIDR | IPs | PTR Density | Organization | Country | State | City |
|---|---|---|---|---|---|---|
| 128.32.0.0/16 | 65.5K |
22.7%
|
University of California at Berkeley | US | California | Oakland |
| 136.152.0.0/16 | 65.5K |
21.4%
|
University of California at Berkeley | US | California | Albany |
| 169.229.0.0/16 | 65.5K |
25.0%
|
University of California at Berkeley | US | California | Walnut Creek |
| 169.236.240.0/21 | 2.0K |
0.0%
|
University of California at Berkeley | US | — | — |
| 208.68.240.0/22 | 1.0K |
5.4%
|
University of California at Berkeley | US | — | — |
| 192.150.186.0/23 | 512 |
0.0%
|
University of California at Berkeley | US | — | — |
| 192.154.4.0/23 | 512 |
7.6%
|
University of California at Berkeley | US | — | — |
| 67.21.36.0/24 | 256 |
22.7%
|
University of California at Berkeley | US | — | — |
| 192.12.234.0/24 | 256 |
10.2%
|
University of California at Berkeley | US | — | — |
| 192.35.209.0/24 | 256 |
0.0%
|
University of California at Berkeley | US | — | — |
| 192.154.6.0/24 | 256 |
3.5%
|
University of California at Berkeley | US | — | — |
| 209.129.246.0/24 | 256 |
0.0%
|
University of California at Berkeley | US | — | — |
BGP Announced Prefixes
Live BGP anomalies →Prefixes AS25 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 |
|---|---|---|
| 169.229.176.0/20 | 7,289 | 2026-07-21 17:20:41 |
| 67.21.36.0/24 | 6,637 | 2026-07-21 18:41:36 |
| 192.154.6.0/24 | 6,546 | 2026-07-21 17:20:41 |
| 169.236.240.0/21 | 6,377 | 2026-07-21 17:20:40 |
| 192.12.234.0/24 | 6,366 | 2026-07-21 18:17:00 |
| 192.150.186.0/23 | 6,361 | 2026-07-21 18:17:00 |
| 192.154.4.0/23 | 6,359 | 2026-07-21 18:17:00 |
| 208.68.240.0/22 | 6,334 | 2026-07-21 17:20:40 |
| 169.229.0.0/16 | 6,300 | 2026-07-21 17:20:38 |
| 136.152.0.0/16 | 6,291 | 2026-07-21 17:20:38 |
| 128.32.0.0/16 | 6,276 | 2026-07-21 17:20:38 |
| 192.35.209.0/24 | 6,261 | 2026-07-21 19:09:55 |
| 209.129.246.0/24 | 932 | 2026-07-21 09:27:25 |
Frequently Asked Questions
What is AS25?
AS25 is an Autonomous System Number assigned to University of California at Berkeley. 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 AS25 announce?
AS25 announces 202.0K IPv4 addresses distributed across 12 routed CIDR prefixes. The network is registered in United States.
Who operates AS25?
AS25 is operated by University of California at Berkeley. The organization is based in United States. You can view all IP ranges and related ASNs on the organization page.
What country is AS25 registered in?
AS25 is registered in United States. This indicates where the network operator is headquartered, though the IP addresses it announces may serve users globally.
