Data as of Nov 7, 2026
131.215.0.0/16
8 residential-proxy exits · 30 daysCalifornia Institute of Technology
Residential-proxy exits
Proxy exits
8
0.01% of its addresses · 30 days
Always-on exits
1
13% of its exits
Spread
4 of 256
/24s with at least one exit
Providers
35
selling exits here
Oct 8, 2026 – Nov 6, 2026
Exits seen per day
7.1K observations
/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
- ZENPROXY_PREMIUM
Announcements
More specific
Announcements inside
| Prefix | Origin | Type | Holder | RPKI |
|---|---|---|---|---|
| 131.215.229.0/24 since Sep 2023 | AS31 | Business | California Institute of Technology | |
| 131.215.230.0/24 since Sep 2023 | AS31 | Business | California Institute of Technology | |
| 131.215.234.0/24 since Sep 2023 | AS31 | Business | California Institute of Technology | |
| 131.215.239.0/24 since Sep 2023 | AS31 | Business | California Institute of Technology | |
| 131.215.240.0/24 since Sep 2023 | AS31 | Business | California Institute of Technology | |
| 131.215.242.0/23 since Sep 2023 | AS31 | Business | California Institute of Technology | |
| 131.215.244.0/23 since Sep 2023 | AS31 | Business | California Institute of Technology |
Network & registry
Origin network
AS31
US
- Name
- California Institute of Technology
- Type
- Education
- Registered
- Sep 21, 1984
- Domain
- caltech.edu
- Industry
- Colleges, Universities, and Professional Schools
- Spamhaus ASN-DROP
- not listed
Routing timeline
Who has announced this prefix
Summary
Routing history
- Pattern
- Stable
- First seen
- May 2005
- Current origin since
- May 2005 · 21 yr
- Origin networks
- 1
IRR
Route objects on the exact prefix
| Origin | Registry | Description | Maintainer | Modified |
|---|---|---|---|---|
| AS31 | RADB | California Institute of Technology | MAINT-AS2150 | Nov 13, 2023 |
Whois
Registration for this announcement
- Range
- 131.
215. 0. 0/ 16 - Netname
- CALTECH-NET
- Registrant
- California Institute of Technology
- Organization
- California Institute of Technology (CIT-4-Z)
- Org address
- 1200 East California Boulevard, Pasadena, CA, 91125
- Org country
- US
- Type
- Direct Allocation
- Handle
- NET-131-215-0-0-1
- Parent
- NET-131-0-0-0-0
- Created
- Jan 19, 1989
- RIR
- ARIN
- Country
- US
- Delegated
- Jan 19, 1989
- Status
- assigned
Report abuse
Abuse contact
- noc@
caltech. edu - Name
- Caltech Network Operations Center
- Phone
- +1-626-395-3500
- Handle
- CI2-ORG-ARIN