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": [
            "172.20.175.104_29",
            "172.20.175.96_29",
            "172.20.21.96_29",
            "172.21.64.96_29",
            "172.21.92.64_29",
            "172.21.92.72_29",
            "172.22.160.48_29",
            "172.22.167.64_29",
            "172.22.167.72_29",
            "172.22.167.80_29",
            "172.22.169.16_29",
            "172.23.183.0_29",
            "172.23.183.240_29",
            "172.23.183.248_29",
            "172.23.251.64_29"
        ],
        "28": [
            "172.20.175.112_28",
            "172.20.184.240_28",
            "172.20.228.208_28",
            "172.20.32.64_28",
            "172.20.4.112_28",
            "172.20.4.96_28",
            "172.21.125.208_28",
            "172.21.64.16_28",
            "172.22.148.224_28",
            "172.22.160.32_28",
            "172.23.162.32_28",
            "172.23.234.48_28",
            "172.23.73.64_28",
            "172.23.89.0_28",
            "172.23.91.192_28"
        ],
        "27": [
            "172.20.175.32_27",
            "172.20.231.224_27",
            "172.20.238.32_27",
            "172.20.41.32_27",
            "172.20.41.64_27",
            "172.20.41.96_27",
            "172.21.67.64_27",
            "172.21.75.32_27",
            "172.22.110.96_27",
            "172.22.158.224_27",
            "172.22.186.0_27",
            "172.22.186.32_27",
            "172.23.101.192_27",
            "172.23.101.224_27",
            "172.23.104.32_27"
        ],
        "26": [
            "172.20.2.64_26",
            "172.20.34.128_26",
            "172.20.55.128_26",
            "172.21.106.64_26",
            "172.21.75.64_26",
            "172.21.89.64_26",
            "172.22.186.128_26",
            "172.22.186.192_26",
            "172.22.186.64_26",
            "172.23.176.0_26",
            "172.23.190.64_26",
            "172.23.230.128_26",
            "172.23.230.192_26",
            "172.23.230.64_26",
            "172.23.231.64_26"
        ],
        "25": [
            "172.20.235.128_25",
            "172.20.28.128_25",
            "172.20.41.128_25",
            "172.21.100.128_25",
            "172.21.75.128_25",
            "172.21.89.128_25",
            "172.22.182.128_25",
            "172.22.183.0_25",
            "172.22.183.128_25",
            "172.23.189.128_25",
            "172.23.223.128_25",
            "172.23.231.128_25",
            "172.23.67.128_25",
            "172.23.93.0_25",
            "172.23.93.128_25"
        ],
        "24": [
            "172.20.236.0_24",
            "172.20.29.0_24",
            "172.21.78.0_24",
            "172.22.124.0_24",
            "172.22.179.0_24",
            "172.22.180.0_24",
            "172.22.96.0_24",
            "172.23.131.0_24",
            "172.23.182.0_24",
            "172.23.224.0_24",
            "172.23.232.0_24",
            "172.23.70.0_24",
            "172.23.71.0_24",
            "172.23.72.0_24",
            "172.23.97.0_24"
        ],
        "23": [
            "172.20.132.0_23",
            "172.20.224.0_23",
            "172.21.72.0_23",
            "172.21.76.0_23",
            "172.21.90.0_23",
            "172.22.122.0_23",
            "172.22.144.0_23",
            "172.22.154.0_23",
            "172.23.114.0_23",
            "172.23.134.0_23",
            "172.23.180.0_23",
            "172.23.32.0_23",
            "172.23.68.0_23",
            "172.23.94.0_23",
            "172.23.98.0_23"
        ]
    },
    "mtime": "2019-07-21T01:01:20Z"
}