{
  "_disclaimer": "This data is provided for informational and educational purposes only. ToolsmithPro does not warrant the correctness or accuracy of this CIDR reference table. Consuming parties agree that ToolsmithPro holds no liability for issues arising from the use of this data.",
  "_last_updated": "2026-06-18T07:36:23Z",
  "cidrs": [
    {
      "cidr": "/32",
      "subnet_mask": "255.255.255.255",
      "wildcard_mask": "0.0.0.0",
      "total_addresses": 1,
      "usable_hosts": 1
    },
    {
      "cidr": "/31",
      "subnet_mask": "255.255.255.254",
      "wildcard_mask": "0.0.0.1",
      "total_addresses": 2,
      "usable_hosts": 2
    },
    {
      "cidr": "/30",
      "subnet_mask": "255.255.255.252",
      "wildcard_mask": "0.0.0.3",
      "total_addresses": 4,
      "usable_hosts": 2
    },
    {
      "cidr": "/29",
      "subnet_mask": "255.255.255.248",
      "wildcard_mask": "0.0.0.7",
      "total_addresses": 8,
      "usable_hosts": 6
    },
    {
      "cidr": "/28",
      "subnet_mask": "255.255.255.240",
      "wildcard_mask": "0.0.0.15",
      "total_addresses": 16,
      "usable_hosts": 14
    },
    {
      "cidr": "/27",
      "subnet_mask": "255.255.255.224",
      "wildcard_mask": "0.0.0.31",
      "total_addresses": 32,
      "usable_hosts": 30
    },
    {
      "cidr": "/26",
      "subnet_mask": "255.255.255.192",
      "wildcard_mask": "0.0.0.63",
      "total_addresses": 64,
      "usable_hosts": 62
    },
    {
      "cidr": "/25",
      "subnet_mask": "255.255.255.128",
      "wildcard_mask": "0.0.0.127",
      "total_addresses": 128,
      "usable_hosts": 126
    },
    {
      "cidr": "/24",
      "subnet_mask": "255.255.255.0",
      "wildcard_mask": "0.0.0.255",
      "total_addresses": 256,
      "usable_hosts": 254
    },
    {
      "cidr": "/23",
      "subnet_mask": "255.255.254.0",
      "wildcard_mask": "0.0.1.255",
      "total_addresses": 512,
      "usable_hosts": 510
    },
    {
      "cidr": "/22",
      "subnet_mask": "255.255.252.0",
      "wildcard_mask": "0.0.3.255",
      "total_addresses": 1024,
      "usable_hosts": 1022
    },
    {
      "cidr": "/21",
      "subnet_mask": "255.255.248.0",
      "wildcard_mask": "0.0.7.255",
      "total_addresses": 2048,
      "usable_hosts": 2046
    },
    {
      "cidr": "/20",
      "subnet_mask": "255.255.240.0",
      "wildcard_mask": "0.0.15.255",
      "total_addresses": 4096,
      "usable_hosts": 4094
    },
    {
      "cidr": "/19",
      "subnet_mask": "255.255.224.0",
      "wildcard_mask": "0.0.31.255",
      "total_addresses": 8192,
      "usable_hosts": 8190
    },
    {
      "cidr": "/18",
      "subnet_mask": "255.255.192.0",
      "wildcard_mask": "0.0.63.255",
      "total_addresses": 16384,
      "usable_hosts": 16382
    },
    {
      "cidr": "/17",
      "subnet_mask": "255.255.128.0",
      "wildcard_mask": "0.0.127.255",
      "total_addresses": 32768,
      "usable_hosts": 32766
    },
    {
      "cidr": "/16",
      "subnet_mask": "255.255.0.0",
      "wildcard_mask": "0.0.255.255",
      "total_addresses": 65536,
      "usable_hosts": 65534
    },
    {
      "cidr": "/15",
      "subnet_mask": "255.254.0.0",
      "wildcard_mask": "0.1.255.255",
      "total_addresses": 131072,
      "usable_hosts": 131070
    },
    {
      "cidr": "/14",
      "subnet_mask": "255.252.0.0",
      "wildcard_mask": "0.3.255.255",
      "total_addresses": 262144,
      "usable_hosts": 262142
    },
    {
      "cidr": "/13",
      "subnet_mask": "255.248.0.0",
      "wildcard_mask": "0.7.255.255",
      "total_addresses": 524288,
      "usable_hosts": 524286
    },
    {
      "cidr": "/12",
      "subnet_mask": "255.240.0.0",
      "wildcard_mask": "0.15.255.255",
      "total_addresses": 1048576,
      "usable_hosts": 1048574
    },
    {
      "cidr": "/11",
      "subnet_mask": "255.224.0.0",
      "wildcard_mask": "0.31.255.255",
      "total_addresses": 2097152,
      "usable_hosts": 2097150
    },
    {
      "cidr": "/10",
      "subnet_mask": "255.192.0.0",
      "wildcard_mask": "0.63.255.255",
      "total_addresses": 4194304,
      "usable_hosts": 4194302
    },
    {
      "cidr": "/9",
      "subnet_mask": "255.128.0.0",
      "wildcard_mask": "0.127.255.255",
      "total_addresses": 8388608,
      "usable_hosts": 8388606
    },
    {
      "cidr": "/8",
      "subnet_mask": "255.0.0.0",
      "wildcard_mask": "0.255.255.255",
      "total_addresses": 16777216,
      "usable_hosts": 16777214
    },
    {
      "cidr": "/7",
      "subnet_mask": "254.0.0.0",
      "wildcard_mask": "1.255.255.255",
      "total_addresses": 33554432,
      "usable_hosts": 33554430
    },
    {
      "cidr": "/6",
      "subnet_mask": "252.0.0.0",
      "wildcard_mask": "3.255.255.255",
      "total_addresses": 67108864,
      "usable_hosts": 67108862
    },
    {
      "cidr": "/5",
      "subnet_mask": "248.0.0.0",
      "wildcard_mask": "7.255.255.255",
      "total_addresses": 134217728,
      "usable_hosts": 134217726
    },
    {
      "cidr": "/4",
      "subnet_mask": "240.0.0.0",
      "wildcard_mask": "15.255.255.255",
      "total_addresses": 268435456,
      "usable_hosts": 268435454
    },
    {
      "cidr": "/3",
      "subnet_mask": "224.0.0.0",
      "wildcard_mask": "31.255.255.255",
      "total_addresses": 536870912,
      "usable_hosts": 536870910
    },
    {
      "cidr": "/2",
      "subnet_mask": "192.0.0.0",
      "wildcard_mask": "63.255.255.255",
      "total_addresses": 1073741824,
      "usable_hosts": 1073741822
    },
    {
      "cidr": "/1",
      "subnet_mask": "128.0.0.0",
      "wildcard_mask": "127.255.255.255",
      "total_addresses": 2147483648,
      "usable_hosts": 2147483646
    }
  ]
}