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": [
            "172.21.65.72_29",
            "172.21.75.208_29",
            "172.22.130.16_29",
            "172.22.130.24_29",
            "172.22.131.128_29",
            "172.22.131.136_29",
            "172.23.132.192_29",
            "172.23.132.200_29",
            "172.23.190.144_29",
            "172.23.250.128_29",
            "172.23.72.128_29",
            "172.23.79.192_29",
            "172.23.86.144_29",
            "172.23.86.152_29",
            "172.23.89.224_29"
        ],
        "28": [
            "172.20.225.192_28",
            "172.21.101.128_28",
            "172.21.75.192_28",
            "172.21.78.128_28",
            "172.22.105.112_28",
            "172.22.138.128_28",
            "172.22.182.176_28",
            "172.23.190.128_28",
            "172.23.222.144_28",
            "172.23.240.128_28",
            "172.23.240.144_28",
            "172.23.240.160_28",
            "172.23.242.192_28",
            "172.23.76.192_28",
            "172.23.86.128_28"
        ],
        "27": [
            "172.20.235.192_27",
            "172.20.235.224_27",
            "172.21.74.192_27",
            "172.21.85.128_27",
            "172.21.85.160_27",
            "172.21.86.192_27",
            "172.21.86.224_27",
            "172.21.89.192_27",
            "172.22.105.128_27",
            "172.22.105.160_27",
            "172.23.213.128_27",
            "172.23.36.128_27",
            "172.23.57.128_27",
            "172.23.79.128_27",
            "172.23.79.160_27"
        ],
        "26": [
            "172.20.174.192_26",
            "172.20.235.128_26",
            "172.21.114.128_26",
            "172.21.114.192_26",
            "172.21.117.128_26",
            "172.21.75.128_26",
            "172.21.86.128_26",
            "172.21.91.128_26",
            "172.22.182.192_26",
            "172.23.217.128_26",
            "172.23.242.128_26",
            "172.23.34.192_26",
            "172.23.45.128_26",
            "172.23.45.192_26",
            "172.23.76.128_26"
        ],
        "25": [
            "172.20.44.128_25",
            "172.21.80.128_25",
            "172.21.81.128_25",
            "172.22.107.128_25",
            "172.22.116.128_25",
            "172.22.155.128_25",
            "172.22.96.128_25",
            "172.23.105.128_25",
            "172.23.107.128_25",
            "172.23.125.128_25",
            "172.23.162.128_25",
            "172.23.196.128_25",
            "172.23.39.128_25",
            "172.23.87.128_25",
            "172.23.90.128_25"
        ],
        "24": [
            "172.20.133.0_24",
            "172.20.179.0_24",
            "172.21.107.0_24",
            "172.21.115.0_24",
            "172.21.119.0_24",
            "172.21.124.0_24",
            "172.21.73.0_24",
            "172.23.106.0_24",
            "172.23.115.0_24",
            "172.23.129.0_24",
            "172.23.176.0_24",
            "172.23.210.0_24",
            "172.23.65.0_24",
            "172.23.70.0_24",
            "172.23.74.0_24"
        ],
        "23": [
            "172.21.126.0_23",
            "172.23.126.0_23",
            "172.23.134.0_23",
            "172.23.142.0_23",
            "172.23.154.0_23",
            "172.23.228.0_23"
        ]
    },
    "mtime": "2023-11-04T15:03:44Z"
}