All ASNs

Autonomous System details for AS31

AS31

California Institute of Technology • caltech.edu

AS31 — California Institute of Technology

AS Name

CIT

Country

United States (US)

Website

caltech.edu

Number of IPv4

134,144

Number of IPv6

7.92 × 10²⁸

ASN type

Education

Status

Assigned

Registry

ARIN

Allocated

September 21, 1984

Last updated

August 29, 2023

IP Ranges

12 IPv4 prefixes, 1 IPv6 prefixes

Prefix	Company	Number of IPs
131.215.0.0/16	California Institute of Technology	65,536
131.215.229.0/24	California Institute of Technology	256
131.215.230.0/24	California Institute of Technology	256
131.215.234.0/24	California Institute of Technology	256
131.215.239.0/24	California Institute of Technology	256
131.215.240.0/24	California Institute of Technology	256
131.215.242.0/23	California Institute of Technology	512
131.215.244.0/23	California Institute of Technology	512
134.4.0.0/16	California Institute of Technology	65,536
192.12.19.0/24	California Institute of Technology	256
192.31.43.0/24	California Institute of Technology	256
192.41.208.0/24	California Institute of Technology	256
2607:f520::/32	California Institute of Technology	7.92 × 10²⁸

IP ranges are the different blocks of IP addresses advertised by an Autonomous System (AS). These ranges can be used by the same organization operating the AS, or by different organizations.

Peers of AS31

0 peers

AS31 has no peers recorded.

Peering is a direct, often free, traffic exchange between Autonomous Systems (ASNs). They share routes only to their own networks and customers, making connections faster and cheaper for that specific traffic, without providing full internet access to each other.

Upstreams of AS31

3 upstreams

AS2152 AS2153 AS13335

AS31 uses these Autonomous Systems as its upstreams.

An upstream (or transit provider) is another AS that AS31 pays for full internet connectivity, allowing it to reach all global destinations and be reachable by them.

Downstreams of AS31

0 downstreams

AS31 has no downstreams recorded.

A downstream is a customer Autonomous System that pays another AS (its provider) for internet access. The provider AS carries the downstream's traffic and makes its network reachable.