California Institute of Technology
AS31 is California Institute of Technology. It announces 131,840 IPv4 addresses in 12 prefixes, and 1 IPv6 prefixes.
United States· ARIN· allocated 1984-09-21· education
Where its space is
The IPv4 it announces that IP Geolocation places, by country. A /24 counts for the AS announcing most of it.
- United States131,840 · 100.00%
Registry record
Its ASN Whois record, as the registry publishes it.
- handle
- CIT
- name
- California Institute of Technology
- org
- CIT-4-Z
- org name
- California Institute of Technology
- org address
- 1200 East California Boulevard, MS 1-10, Pasadena, CA, 91125
- org city
- Pasadena
- org country
- US
- country
- US
- source
- arin
- created
- 1984-09-21
- updated
- 2023-08-29
- abuse name
- Caltech Network Operations Center
- abuse email
- noc@caltech.edu
- abuse phone
- +1-626-395-3500
- abuse kind
- role
- abuse city
- Pasadena
- abuse country
- US
- admin name
- Caltech Network Operations Center
- admin email
- noc@caltech.edu
- admin phone
- +1-626-395-3500
- admin kind
- role
- admin city
- Pasadena
- admin country
- US
- tech
- CI2-ORG-ARIN
- tech name
- Caltech Network Operations Center
- tech email
- noc@caltech.edu
- tech phone
- +1-626-395-3500
- tech kind
- role
- tech city
- Pasadena
- tech country
- US
What the databases see
Addresses each address-keyed database holds in the IPv4 it announces, as a share of that space, with its largest providers. Counts overlap.
- VPN IP97draytek0.07%
- anyip, geonode, proxyseller0.00%
- None here
- None here
- 0.00%
- None here
- Hosting IP14,84811.26%
- None here
- None here
- None here
- SSH IP1,2830.97%
- SMTP IP250.02%
- 0.03%
IPv4 prefixes
Every IPv4 prefix BGP Route saw it announce. A prefix another AS also announces says so.
| PREFIX | COUNTRY | RPKI | PEERS | FIRST SEEN |
|---|---|---|---|---|
| 131.215.0.0/16 | United States | not found | 19 | 2026-10-02 |
| 131.215.229.0/24 | United States | not found | 18 | 2026-10-02 |
| 131.215.230.0/24 | United States | not found | 18 | 2026-10-02 |
| 131.215.234.0/24 | United States | not found | 18 | 2026-10-02 |
| 131.215.239.0/24 | United States | not found | 18 | 2026-10-02 |
| 131.215.240.0/24 | United States | not found | 18 | 2026-10-02 |
| 131.215.242.0/23 | United States | not found | 18 | 2026-10-02 |
| 131.215.244.0/23 | United States | not found | 18 | 2026-10-02 |
| 134.4.0.0/16 | United States | not found | 19 | 2026-10-02 |
| 192.12.19.0/24 | United States | not found | 19 | 2026-10-02 |
| 192.31.43.0/24 | United States | not found | 19 | 2026-10-02 |
| 192.41.208.0/24 | United States | not found | 19 | 2026-10-02 |
IPv6 prefixes
Every IPv6 prefix BGP Route saw it announce.
| PREFIX | COUNTRY | RPKI | PEERS | FIRST SEEN |
|---|---|---|---|---|
| 2607:f520::/32 | United States | not found | 20 | 2026-10-02 |
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