Data as of Nov 3, 2026
Autonomous system
AS31
California Institute of Technology
Announces 131,840 addresses in 12 prefixes. None of it is anonymizer space.
Type
Education
US
Proxy activity, 30 days
8 exits
Announced prefixes
| Prefix | Type | Proxy exits | RPKI |
|---|---|---|---|
| 131.215.0.0/16 since May 2005 | Business | 8 1 always on | |
| 131.215.229.0/24 since Sep 2023 | Business | ||
| 131.215.230.0/24 since Sep 2023 | Business | ||
| 131.215.234.0/24 since Sep 2023 | Business | ||
| 131.215.239.0/24 since Sep 2023 | Business | ||
| 131.215.240.0/24 since Sep 2023 | Business | ||
| 131.215.242.0/23 since Sep 2023 | Business | ||
| 131.215.244.0/23 since Sep 2023 | Business | ||
| 134.4.0.0/16 since May 2005 | Business | ||
| 192.12.19.0/24 since May 2005 | Business | ||
| 192.31.43.0/24 since Mar 2009 | Business | ||
| 192.41.208.0/24 since May 2005 | Business |
Residential-proxy exposure
Always-on exits
1
13% of its exits
Spread
4
/24s with at least one exit
Providers
34
selling exits here
/24s with the most always-on exits
| /24 | Always-on exits | Proxy exits | |
|---|---|---|---|
| 131.215.135.0/24 | 1 | 1 | |
| 131.215.220.0/24 | 0 | 5 | |
| 131.215.66.0/24 | 0 | 1 | |
| 131.215.228.0/24 | 0 | 1 |
Proxy providers listing exits
- 2Captcha
- AnyIP
- BirdProxies
- BottingTools
- ByteProxies
- Byteful
- CliProxy
- ColaProxy
- DataImpulse
- EnigmaProxy
- Evomi
- FloppyData
- GSocks
- Geonode
- GonzoProxy
- IPPeak
- Infatica
- InfiniteProxies
- LemonBright
- MangoProxy
- NodeProxy
- NovaProxy
- Novada
- Proxiware
- Proxy-Seller
- Proxy4U
- ProxyEmpire
- ProxyRack
- Proxyma
- RainProxy
- Shifter
- Thordata
- VantageProxies
- VitalExclusive
Proxy activity
Oct 4, 2026 – Nov 2, 2026
AS31, day by day
7.3K observations
Network & history
Profile
- Registered
- Sep 21, 1984
- Domain
- caltech.edu
- Industry
- Colleges, Universities, and Professional Schools
Routing patterns
How its announcements have moved
Arrivals