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ASN Lookup Tool
AS4721 JCN

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ASN Extended Info API & BGP Active Prefixes API
ASN Details
ASN
AS4721
Organisation
J:COM (former JCN)
Name
JCN
Total IPv4 Addresses
631680
Total IPv4 Prefixes
108
Total IPv6 Prefixes
1
Total IPv4 Bogon Prefixes
0
Total IPv6 Bogon Prefixes
0
IPv4 Space Rank
#513 out of 77,221
Registry
Radb
Registered Country
ZZ flag ZZ
Registered Country Name
ZZ
Registered Date
NA
Registration Last Change
NA
Receiving From

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

ASN
Organisation
AS9824
JP flagJCOM Co., Ltd.
IPv4 Active Prefixes

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

Prefix14.193.0.0/17
Range From14.193.0.0
Range To14.193.127.255
Prefix14.193.128.0/17
Range From14.193.128.0
Range To14.193.255.255
Prefix61.203.224.0/20
Range From61.203.224.0
Range To61.203.239.255
Prefix61.203.240.0/20
Range From61.203.240.0
Range To61.203.255.255
Prefix110.4.48.0/21
Range From110.4.48.0
Range To110.4.55.255
Showing 5 of 108
IPv6 Active Prefixes
Prefix2001:c30::/32
Range From2001:c30::
Range To2001:c30:ffff:ffff:ffff:ffff:ffff:ffff
Autonomous System (AS) is a network (or collection of networks) that are all managed and supervised by a single entity or organisation. This tool provides a comprehensive ownership and connectivity report for any given AS number.