Data as of Nov 7, 2026
131.215.239.0/24
No anonymizer space · no proxy exits in 30 daysCalifornia Institute of Technology
Announcements
Less specific
Covering announcements
| Prefix | Origin | Type | Proxy exits | Holder | RPKI |
|---|---|---|---|---|---|
| 131.215.0.0/16 since May 2005 | AS31 | Business | 8 1 always on | 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
Covering aggregate above, the prefix's own history below
Summary
Routing history
- Pattern
- Stable
- First seen
- Sep 2023
- Current origin since
- Sep 2023 · 3.2 yr
- Origin networks
- 1
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