Autonomous system profile

Review registration details, announced prefixes, network relationships and historical snapshots.

AS31

Announcement observedARIN

California Institute of Technology · CIT

This profile is assembled from CHA.LA's normalized registration, routing and observation snapshots.

Last active9/29/2026, 05:49:11Snapshot expired

View network topology RDAP registration

ASN: AS31
Registration country: United States
Name: California Institute of Technology
Abbreviation: CIT
Registration date: 9/21/1984, 04:00:00
Status: Announcement observed
RIR: ARIN

Network relationships and announced prefixes

ASN / prefix	Description / organization	Geographic scope	First seen	Last active	IPv4	IPv6	Status
131.215.0.0/16BGP · IPv4	Announced prefixBGP route observation	Not applicable · BGP prefix	9/15/2026, 00:00:00	10/21/2026, 00:00:00	✓	×	Currently valid
131.215.229.0/24BGP · IPv4	Announced prefixBGP route observation	Not applicable · BGP prefix	9/15/2026, 00:00:00	10/21/2026, 00:00:00	✓	×	Currently valid
131.215.230.0/24BGP · IPv4	Announced prefixBGP route observation	Not applicable · BGP prefix	9/15/2026, 00:00:00	10/21/2026, 00:00:00	✓	×	Currently valid
131.215.234.0/24BGP · IPv4	Announced prefixBGP route observation	Not applicable · BGP prefix	9/15/2026, 00:00:00	10/21/2026, 00:00:00	✓	×	Currently valid
131.215.239.0/24BGP · IPv4	Announced prefixBGP route observation	Not applicable · BGP prefix	9/15/2026, 00:00:00	10/21/2026, 00:00:00	✓	×	Currently valid
131.215.240.0/24BGP · IPv4	Announced prefixBGP route observation	Not applicable · BGP prefix	9/15/2026, 00:00:00	10/21/2026, 00:00:00	✓	×	Currently valid
131.215.242.0/23BGP · IPv4	Announced prefixBGP route observation	Not applicable · BGP prefix	9/15/2026, 00:00:00	10/21/2026, 00:00:00	✓	×	Currently valid
131.215.244.0/23BGP · IPv4	Announced prefixBGP route observation	Not applicable · BGP prefix	9/15/2026, 00:00:00	10/21/2026, 00:00:00	✓	×	Currently valid
134.4.0.0/16BGP · IPv4	Announced prefixBGP route observation	Not applicable · BGP prefix	9/15/2026, 00:00:00	10/21/2026, 00:00:00	✓	×	Currently valid
192.12.19.0/24BGP · IPv4	Announced prefixBGP route observation	Not applicable · BGP prefix	9/15/2026, 00:00:00	10/21/2026, 00:00:00	✓	×	Currently valid
192.31.43.0/24BGP · IPv4	Announced prefixBGP route observation	Not applicable · BGP prefix	9/15/2026, 00:00:00	10/21/2026, 00:00:00	✓	×	Currently valid
192.41.208.0/24BGP · IPv4	Announced prefixBGP route observation	Not applicable · BGP prefix	9/15/2026, 00:00:00	10/21/2026, 00:00:00	✓	×	Currently valid

BGP prefixes have no geographic country; the column is marked not applicable.

Registration and sources

Organization: California Institute of Technology
RIR: ARIN
Registration country: United States
Registration date: 9/21/1984, 04:00:00
Abuse contact: noc@caltech.edu

Snapshot trend

9/29/2026, 05:49:1112 v41 v63 Upstream · 0 Uncertain

ASN route snapshotThis page reads collected ASN, prefix, relationship and history data. External interfaces are used for initial collection and scheduled refreshes.Source keys: cha-la-external-routing · iana-rdap-asn-bootstrap · rir-rdap-asn