Japan IP Ranges in CIDR format

Updated: 02 August 2025

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Download formats

IPTables

IPTables - for Linux firewalls

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IPChains

IPChains - for older Linux systems

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Cisco ACL

Cisco ACL - for Cisco routers and switches

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CIDR

CIDR - standard notation for IP ranges

Download CIDR

IPv4 Ranges

Total ranges: 4669

1.0.16.0/20
1.0.64.0/18
1.1.64.0/18
1.5.0.0/16
1.21.0.0/18
1.21.64.0/19
1.21.96.0/20
1.21.112.0/20
1.21.128.0/20
1.21.144.0/20
1.21.160.0/19
1.21.192.0/19
1.33.0.0/16
1.66.0.0/15
1.72.0.0/13
1.112.0.0/14
14.0.8.0/22
14.1.4.0/22
14.1.8.0/21
14.3.0.0/16
4649 more ranges...

IPv6 Ranges

Total ranges: 762

2001:200::/35
2001:200:2000::/35
2001:200:4000::/34
2001:200:8000::/33
2001:218::/35
2001:218:2000::/35
2001:218:4000::/34
2001:218:8000::/33
2001:240::/35
2001:240:2000::/35
2001:240:4000::/34
2001:240:8000::/33
2001:258::/35
2001:258:2000::/35
2001:258:4000::/34
2001:258:8000::/33
2001:260::/35
2001:260:2000::/35
2001:260:4000::/34
2001:260:8000::/33
742 more ranges...

What are IP ranges for Japan?

IP ranges for Japan are sets of IP addresses assigned to internet service providers and organizations within Japan. These addresses are used to connect devices to the internet or internal networks and help identify traffic originating from Japan.

How to use Japan IP ranges

IP ranges for Japan are widely used in network device configurations such as firewalls, routers and switches. You can use these ranges to filter traffic, block unwanted connections from or to Japan, or allow access only to specific IP addresses from Japan.

IPv4 and IPv6 ranges for Japan

Current IPv4 and IPv6 ranges allow you to configure secure and reliable connections with Japan. You can use these ranges to configure IPTABLES, IPCHAINS and CISCO ACL configurations for network security and access control.

IPv4 Ranges

Total ranges: 4669

IPv4 ranges for Japan include main address blocks used by internet service providers and organizations.

IPv6 Ranges

Total ranges: 762

IPv6 ranges for Japan represent modern next-generation address blocks for advanced network infrastructure.

Network security tools for Japan

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