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": [
            "172.20.173.208_29",
            "172.20.225.144_29",
            "172.21.112.128_29",
            "172.21.66.168_29",
            "172.21.93.128_29",
            "172.22.145.160_29",
            "172.22.169.152_29",
            "172.23.101.136_29",
            "172.23.178.136_29",
            "172.23.186.128_29",
            "172.23.213.128_29",
            "172.23.217.160_29",
            "172.23.244.128_29",
            "172.23.43.128_29",
            "172.23.76.160_29"
        ],
        "28": [
            "172.21.73.96_28",
            "172.21.75.208_28",
            "172.21.91.128_28",
            "172.22.142.128_28",
            "172.22.161.112_28",
            "172.23.105.128_28",
            "172.23.111.192_28",
            "172.23.120.128_28",
            "172.23.124.128_28",
            "172.23.127.0_28",
            "172.23.180.192_28",
            "172.23.53.160_28",
            "172.23.70.0_28",
            "172.23.87.128_28",
            "172.23.97.160_28"
        ],
        "27": [
            "172.21.101.192_27",
            "172.21.101.224_27",
            "172.21.109.128_27",
            "172.21.81.192_27",
            "172.21.84.192_27",
            "172.22.145.128_27",
            "172.23.182.128_27",
            "172.23.189.128_27",
            "172.23.196.128_27",
            "172.23.217.128_27",
            "172.23.39.128_27",
            "172.23.39.160_27",
            "172.23.53.128_27",
            "172.23.76.128_27",
            "172.23.97.128_27"
        ],
        "26": [
            "172.21.101.128_26",
            "172.21.105.0_26",
            "172.21.92.128_26",
            "172.21.92.192_26",
            "172.22.140.128_26",
            "172.22.161.128_26",
            "172.23.125.128_26",
            "172.23.125.192_26",
            "172.23.230.128_26",
            "172.23.230.192_26",
            "172.23.236.128_26",
            "172.23.39.192_26",
            "172.23.57.128_26",
            "172.23.57.192_26",
            "172.23.84.128_26"
        ],
        "25": [
            "172.21.82.128_25",
            "172.21.88.128_25",
            "172.22.107.128_25",
            "172.22.116.128_25",
            "172.22.154.128_25",
            "172.22.167.128_25",
            "172.23.107.128_25",
            "172.23.226.128_25",
            "172.23.231.128_25",
            "172.23.246.128_25",
            "172.23.72.128_25",
            "172.23.85.128_25",
            "172.23.86.128_25",
            "172.23.90.128_25",
            "172.23.93.128_25"
        ],
        "24": [
            "172.21.104.0_24",
            "172.21.107.0_24",
            "172.21.115.0_24",
            "172.21.119.0_24",
            "172.21.124.0_24",
            "172.21.76.0_24",
            "172.21.95.0_24",
            "172.21.98.0_24",
            "172.22.136.0_24",
            "172.23.176.0_24",
            "172.23.191.0_24",
            "172.23.204.0_24",
            "172.23.61.0_24",
            "172.23.65.0_24",
            "172.23.74.0_24"
        ],
        "23": [
            "172.20.156.0_23",
            "172.21.102.0_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",
            "172.23.94.0_23"
        ]
    },
    "mtime": "2024-06-25T15:03:39Z"
}