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": [
            "172.20.183.192_29",
            "172.20.183.200_29",
            "172.20.231.128_29",
            "172.21.109.8_29",
            "172.21.123.144_29",
            "172.21.123.152_29",
            "172.21.78.160_29",
            "172.22.124.48_29",
            "172.22.132.208_29",
            "172.23.107.128_29",
            "172.23.173.176_29",
            "172.23.213.128_29",
            "172.23.57.128_29",
            "172.23.86.144_29",
            "172.23.87.128_29"
        ],
        "28": [
            "172.20.44.128_28",
            "172.21.121.128_28",
            "172.21.125.208_28",
            "172.21.78.128_28",
            "172.21.78.144_28",
            "172.22.132.192_28",
            "172.22.147.192_28",
            "172.22.186.160_28",
            "172.22.186.176_28",
            "172.23.190.128_28",
            "172.23.199.128_28",
            "172.23.232.224_28",
            "172.23.48.128_28",
            "172.23.49.192_28",
            "172.23.86.128_28"
        ],
        "27": [
            "172.21.110.128_27",
            "172.22.114.192_27",
            "172.22.186.128_27",
            "172.22.98.160_27",
            "172.22.98.192_27",
            "172.23.131.64_27",
            "172.23.131.96_27",
            "172.23.232.128_27",
            "172.23.232.160_27",
            "172.23.232.192_27",
            "172.23.234.160_27",
            "172.23.247.64_27",
            "172.23.247.96_27",
            "172.23.34.192_27",
            "172.23.34.224_27"
        ],
        "26": [
            "172.20.183.128_26",
            "172.21.78.64_26",
            "172.22.114.128_26",
            "172.22.149.128_26",
            "172.22.168.128_26",
            "172.22.168.192_26",
            "172.23.178.192_26",
            "172.23.186.128_26",
            "172.23.186.192_26",
            "172.23.190.64_26",
            "172.23.34.128_26",
            "172.23.43.128_26",
            "172.23.43.192_26",
            "172.23.85.128_26",
            "172.23.85.192_26"
        ],
        "25": [
            "172.20.237.128_25",
            "172.21.77.128_25",
            "172.22.108.128_25",
            "172.23.105.128_25",
            "172.23.161.0_25",
            "172.23.162.128_25",
            "172.23.221.128_25",
            "172.23.230.128_25",
            "172.23.240.128_25",
            "172.23.242.128_25",
            "172.23.246.128_25",
            "172.23.247.128_25",
            "172.23.250.128_25",
            "172.23.59.128_25",
            "172.23.77.128_25"
        ],
        "24": [
            "172.21.107.0_24",
            "172.21.119.0_24",
            "172.21.124.0_24",
            "172.21.73.0_24",
            "172.21.95.0_24",
            "172.21.98.0_24",
            "172.23.106.0_24",
            "172.23.176.0_24",
            "172.23.210.0_24",
            "172.23.243.0_24",
            "172.23.61.0_24",
            "172.23.62.0_24",
            "172.23.74.0_24",
            "172.23.97.0_24",
            "172.23.98.0_24"
        ],
        "23": [
            "172.21.126.0_23",
            "172.21.96.0_23",
            "172.23.134.0_23",
            "172.23.142.0_23",
            "172.23.154.0_23",
            "172.23.228.0_23"
        ]
    },
    "mtime": "2023-03-23T11:11:54Z"
}