geo-ip-blocks

🔍 Try it online

Look up any IP address or prefix at Lens by ipverse to see its country and AS information.

Overview

New repo alert: Don't let the star count fool you - the prefixes are here, the stars are just still propagating. Being freshly launched, there may be a few bugs crawling around. If you spot one, please report it in the feedback repo.

Daily-updated IPv4 and IPv6 prefixes by country, derived from network registration data.

This dataset reflects the country codes in actual network registration records - capturing sub-allocations and reassignments (SWIP) that RIR delegation files miss. Keep in mind this is where operators registered their blocks, which doesn't always match where traffic actually originates.

Prefixes are aggregated (adjacent and overlapping CIDR blocks are merged where possible) and filtered by size (IPv4 ≤ /28, IPv6 ≤ /56). If these lists are too large for your use case, check out country-ip-blocks which uses RIR delegation information and produces smaller lists.

Update notes

• 2026-01-27: Improved proxy record detection to filter placeholder entries that RIRs maintain for IP ranges belonging to other registries

Available formats

JSON and plaintext

JSON format:

{
  "country": "Marshall Islands",
  "countryCode": "MH",
  "exportMode": "aggregated",
  "prefixes": {
    "ipv4": [
      "23.181.56.0/24",
      "64.86.23.0/24",
      "103.202.148.0/22"
    ],
    "ipv6": [
      "2001:4b28:4c00::/40",
      "2405:400::/32"
    ]
  }
}

Plaintext format (Marshall Islands IPv4):

# Country: Marshall Islands (MH)
# Address family: IPv4
# Export mode: Aggregated
#
23.181.56.0/24
64.86.23.0/24
103.202.148.0/22

Plaintext format (Marshall Islands IPv6):

# Country: Marshall Islands (MH)
# Address family: IPv6
# Export mode: Aggregated
#
2001:4b28:4c00::/40
2405:400::/32

How to use

Download the prefixes for a specific country (Marshall Islands in these examples):

Marshall Islands in JSON format:

curl https://raw.githubusercontent.com/ipverse/geo-ip-blocks/master/country/mh/mh.json

Marshall Islands IPv4 addresses:

curl https://raw.githubusercontent.com/ipverse/geo-ip-blocks/master/country/mh/mh-ipv4.txt

Marshall Islands IPv6 addresses:

curl https://raw.githubusercontent.com/ipverse/geo-ip-blocks/master/country/mh/mh-ipv6.txt

Firewall integration

If you plan to use this data for firewalling purposes, have a look at:

• nftables-blacklist - nftables based Bash script
• ipverse-tools-crowdsec - Ban prefixes using Crowdsec's cscli command

Use cases

• Geo-based access control and traffic routing
• Block traffic by country at the firewall
• Network research and statistical analysis
• Threat hunting and security research
• Compliance-based IP filtering
• Pretty much anything where you need to map country codes to IP prefixes

Related projects

• country-ip-blocks: Country-level IP blocks from RIR delegation files (less granular, but authoritative)
• as-ip-blocks: IP blocks by autonomous system number (ASN) from BGP routing data

Questions or issues?

Head over to the feedback repository if you have questions, issues, or suggestions.

License

This data is released under CC0 1.0 Universal.