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ASN Lookup Tool
AS21589 CSJ-INTERNET

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ASN Extended Info API & BGP Active Prefixes API
ASN Details
ASN
AS21589
Organisation
City of San Jose
Name
CSJ-INTERNET
Total IPv4 Addresses
8,704
Total IPv4 Prefixes
24
Total IPv6 Prefixes
1
Total IPv4 Bogon Prefixes
0
Total IPv6 Bogon Prefixes
0
IPv4 Space Rank
#10,365 out of 79,063
Registry
Arin
Registered Country
US flagUS
Registered Country Name
United States of America (the)
Registered Date
2012-10-04
Registration Last Change
2012-10-04
Receiving From

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

ASN
Organisation
AS7018
US flagAT&T Enterprises, LLC
AS3257
US flagGTT Communications Inc.
AS6939
US flagHurricane Electric LLC
IPv4 Active Prefixes

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

PrefixRange FromRange To
156.39.0.0/24156.39.0.0156.39.0.255
156.39.1.0/24156.39.1.0156.39.1.255
156.39.2.0/24156.39.2.0156.39.2.255
156.39.3.0/24156.39.3.0156.39.3.255
156.39.5.0/24156.39.5.0156.39.5.255
Showing 5 of 24
IPv6 Active Prefixes
PrefixRange FromRange To
2001:470:f0::/482001:470:f0::2001:470:f0:ffff:ffff:ffff:ffff:ffff