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ASN Lookup Tool
AS25 UCB

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ASN Extended Info API & BGP Active Prefixes API
ASN Details
ASN
AS25
Organisation
University of California at Berkeley
Name
UCB
Total IPv4 Addresses
202,244
Total IPv4 Prefixes
19
Total IPv6 Prefixes
32
Total IPv4 Bogon Prefixes
0
Total IPv6 Bogon Prefixes
0
IPv4 Space Rank
#1,118 out of 79,057
Registry
Arin
Registered Country
US flagUS
Registered Country Name
United States of America (the)
Registered Date
1984-08-03
Registration Last Change
2023-12-14
Receiving From

The list of active Autonomous Systems (ASs) which send traffic to that ASN.

ASN
Organisation
AS2152
US flagCENIC
IPv4 Active Prefixes

This provides the list of IPv4 address space routes/prefixes currently announced on Border Gateway Protocol (BGP).

PrefixRange FromRange To
67.21.36.0/2467.21.36.067.21.36.255
128.32.0.0/16128.32.0.0128.32.255.255
136.152.0.0/16136.152.0.0136.152.255.255
137.164.3.26/31137.164.3.26137.164.3.27
137.164.50.20/31137.164.50.20137.164.50.21
Showing 5 of 19
IPv6 Active Prefixes
PrefixRange FromRange To
2607:f140::/332607:f140::2607:f140:7fff:ffff:ffff:ffff:ffff:ffff
2607:f140:8000::/352607:f140:8000::2607:f140:9fff:ffff:ffff:ffff:ffff:ffff
2607:f140:a001::/482607:f140:a001::2607:f140:a001:ffff:ffff:ffff:ffff:ffff
2607:f140:a002::/472607:f140:a002::2607:f140:a003:ffff:ffff:ffff:ffff:ffff
2607:f140:a004::/462607:f140:a004::2607:f140:a007:ffff:ffff:ffff:ffff:ffff
Showing 5 of 32