DN42 PeerFinder

Find open dn42 prefixes!

Size Comment
/29 starter pack
/28 usually enough
/27 default allocation
/26 usually enough
/25 still a lot of IPs!
/24 are you an organization?

The current guideline is to allocate a /27 or smaller by default, keeping space for up to a /26 if possible. Don't allocate more than a /25 worth of addresses and please think before you allocate: If you are going to have 2-3 servers and two VPN-spaces, a /28 is enough to suit your needs. Same will go for most home-networks. This is not public internet, but our IPv4-space is valuable too! If you need a /24 or larger, please ask in the IRC chan or on the mailing list.

For example, if there is no /27 free, you can split up a /26 into two /27. If you are looking for a /27 but there are none showing in the Open Netblocks tool, instead pick one of the /26 and click Take it! When registering your inetnum, instead of writing 172.2x.xxx.0-172.2x.xxx.63 then you can write 172.2x.xxx.0-172.2x.xxx.31. This will get you a /27 and save our IP space for others.

To register for example 172.20.150.0/27, you need to fill in 172.20.150.0-172.20.150.31.

JSON Output

{
    "prefixes": {
        "29": [
            "172.20.128.48_29",
            "172.20.15.240_29",
            "172.21.69.160_29",
            "172.21.90.0_29",
            "172.21.90.8_29",
            "172.21.94.192_29",
            "172.22.128.64_29",
            "172.22.148.240_29",
            "172.22.98.0_29",
            "172.23.105.160_29",
            "172.23.105.168_29",
            "172.23.124.128_29",
            "172.23.183.224_29",
            "172.23.188.0_29",
            "172.23.35.128_29"
        ],
        "28": [
            "172.20.146.0_28",
            "172.20.146.16_28",
            "172.20.159.160_28",
            "172.20.159.176_28",
            "172.20.228.128_28",
            "172.20.39.128_28",
            "172.21.66.32_28",
            "172.21.66.48_28",
            "172.21.67.128_28",
            "172.21.93.96_28",
            "172.22.105.0_28",
            "172.22.186.112_28",
            "172.22.188.192_28",
            "172.23.128.0_28",
            "172.23.183.16_28"
        ],
        "27": [
            "172.20.132.96_27",
            "172.20.139.128_27",
            "172.20.150.160_27",
            "172.20.159.128_27",
            "172.20.163.64_27",
            "172.20.177.128_27",
            "172.20.224.96_27",
            "172.20.231.224_27",
            "172.20.28.128_27",
            "172.20.46.192_27",
            "172.20.5.224_27",
            "172.22.101.0_27",
            "172.22.137.96_27",
            "172.22.180.0_27",
            "172.22.180.32_27"
        ],
        "26": [
            "172.20.138.192_26",
            "172.20.15.128_26",
            "172.20.160.64_26",
            "172.20.224.128_26",
            "172.22.127.128_26",
            "172.22.127.192_26",
            "172.22.128.0_26",
            "172.22.179.192_26",
            "172.23.107.128_26",
            "172.23.107.192_26",
            "172.23.193.192_26",
            "172.23.232.128_26",
            "172.23.35.0_26",
            "172.23.35.64_26",
            "172.23.45.128_26"
        ],
        "25": [
            "172.20.139.0_25",
            "172.20.161.0_25",
            "172.20.232.0_25",
            "172.22.107.128_25",
            "172.22.116.128_25",
            "172.22.160.128_25",
            "172.23.100.0_25",
            "172.23.116.128_25",
            "172.23.196.128_25",
            "172.23.203.0_25",
            "172.23.226.128_25",
            "172.23.238.128_25",
            "172.23.67.128_25",
            "172.23.71.128_25",
            "172.23.85.128_25"
        ],
        "24": [
            "172.20.226.0_24",
            "172.20.35.0_24",
            "172.22.104.0_24",
            "172.22.139.0_24",
            "172.22.140.0_24",
            "172.22.173.0_24",
            "172.22.176.0_24",
            "172.23.117.0_24",
            "172.23.166.0_24",
            "172.23.176.0_24",
            "172.23.204.0_24",
            "172.23.216.0_24",
            "172.23.239.0_24",
            "172.23.41.0_24",
            "172.23.68.0_24"
        ],
        "23": [
            "172.20.144.0_23",
            "172.20.22.0_23",
            "172.20.60.0_23",
            "172.21.124.0_23",
            "172.22.174.0_23",
            "172.22.190.0_23",
            "172.23.138.0_23",
            "172.23.154.0_23",
            "172.23.164.0_23",
            "172.23.184.0_23",
            "172.23.210.0_23",
            "172.23.228.0_23",
            "172.23.46.0_23",
            "172.23.80.0_23"
        ]
    },
    "mtime": "2025-02-07T21:09:33Z"
}