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ASN Lookup Tool
AS31 CIT

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ASN Extended Info API & BGP Active Prefixes API
ASN Details
ASN
AS31
Organisation
California Institute of Technology
Name
CIT
Total IPv4 Addresses
131,850
Total IPv4 Prefixes
26
Total IPv6 Prefixes
3
Total IPv4 Bogon Prefixes
0
Total IPv6 Bogon Prefixes
0
IPv4 Space Rank
#1,583 out of 79,049
Registry
Arin
Registered Country
US flagUS
Registered Country Name
United States of America (the)
Registered Date
1984-09-21
Registration Last Change
2023-08-29
Receiving From
ASN
Organisation
AS2152
US flagCENIC
AS13335
US flagCloudflare, Inc.
AS2153
US flagCENIC
IPv4 Active Prefixes
PrefixRange FromRange To
131.215.0.0/17131.215.0.0131.215.127.255
131.215.128.0/18131.215.128.0131.215.191.255
131.215.192.0/19131.215.192.0131.215.223.255
131.215.224.0/22131.215.224.0131.215.227.255
131.215.228.0/24131.215.228.0131.215.228.255
Showing 5 of 26
IPv6 Active Prefixes
PrefixRange FromRange To
2607:f380:1::118:9a40:34a0/1232607:f380:1::118:9a40:34a02607:f380:1::118:9a40:34bf
2607:f380:1::118:9a41:8480/1212607:f380:1::118:9a41:84802607:f380:1::118:9a41:84ff
2607:f520::/322607:f520::2607:f520:ffff:ffff:ffff:ffff:ffff:ffff