{
  "id": "route53-healthchecks",
  "name": "Amazon Route 53 Health Checks",
  "operator": {
    "name": "Amazon Web Services",
    "url": "https://aws.amazon.com"
  },
  "description": "Amazon Route 53 health checkers, which probe customer-configured endpoints from AWS data centers worldwide to drive DNS failover. AWS publishes the checker source ranges only inside the general ip-ranges.amazonaws.com feed, tagged with the ROUTE53_HEALTHCHECKS service, which this directory's feed formats cannot filter on, so the ranges are recorded here as a snapshot instead. AWS documents that it rarely changes them.",
  "docs": [
    "https://docs.aws.amazon.com/Route53/latest/DeveloperGuide/route-53-ip-addresses.html",
    "https://docs.aws.amazon.com/Route53/latest/DeveloperGuide/dns-failover-router-firewall-rules.html"
  ],
  "category": "monitoring",
  "user_agents": {
    "patterns": [
      "Amazon Route 53 Health Check Service"
    ],
    "instances": [
      "Amazon Route 53 Health Check Service; ref:47d9bc51-39d6-4cd9-9a7f-4c981c5db165; report http://amzn.to/1vsZADi"
    ]
  },
  "behavior": {
    "respects_robots_txt": false
  },
  "verification": [
    {
      "type": "static_cidrs",
      "cidrs": [
        "107.23.255.0/26",
        "15.177.0.0/18",
        "15.177.108.0/24",
        "160.1.55.0/25",
        "160.1.55.128/25",
        "160.1.56.0/25",
        "176.34.159.192/26",
        "177.71.207.128/26",
        "18.253.167.0/25",
        "18.253.167.128/25",
        "18.253.168.0/25",
        "51.0.252.0/24",
        "52.80.197.0/25",
        "52.80.197.128/25",
        "52.80.198.0/25",
        "52.83.34.128/25",
        "52.83.35.0/25",
        "52.83.35.128/25",
        "54.183.255.128/26",
        "54.228.16.0/26",
        "54.232.40.64/26",
        "54.241.32.64/26",
        "54.243.31.192/26",
        "54.244.52.192/26",
        "54.245.168.0/26",
        "54.248.220.0/26",
        "54.250.253.192/26",
        "54.251.31.128/26",
        "54.252.254.192/26",
        "54.252.79.128/26",
        "54.255.254.192/26",
        "2001:3fc6:100::/48",
        "2400:7fc0:83cc:cc00::/56",
        "2400:7fc0:83cc:cd00::/56",
        "2400:7fc0:83cc:ce00::/56",
        "2404:c2c0:83cc:cc00::/56",
        "2404:c2c0:83cc:cd00::/56",
        "2404:c2c0:83cc:ce00::/56",
        "2406:da14:7ff:f800::/56",
        "2406:da14:fff:f800::/56",
        "2406:da18:7ff:f800::/56",
        "2406:da18:fff:f800::/56",
        "2406:da1c:7ff:f800::/56",
        "2406:da1c:fff:f800::/56",
        "2600:1f14:7ff:f800::/56",
        "2600:1f14:fff:f800::/56",
        "2600:1f18:3fff:f800::/56",
        "2600:1f18:7fff:f800::/56",
        "2600:1f1c:7ff:f800::/56",
        "2600:1f1c:fff:f800::/56",
        "2600:1f1e:7ff:f800::/56",
        "2600:1f1e:fff:f800::/56",
        "2600:f0f0:300:100::/56",
        "2600:f0f0:30e::/48",
        "2600:f0f0:30f::/48",
        "2a05:d018:7ff:f800::/56",
        "2a05:d018:fff:f800::/56"
      ]
    }
  ],
  "tier": 2,
  "tier_label": "Verifiable",
  "first_seen": "2026-07-09T03:01:47.690Z",
  "resolved_cidrs": [
    "107.23.255.0/26",
    "15.177.0.0/18",
    "15.177.108.0/24",
    "160.1.55.0/25",
    "160.1.55.128/25",
    "160.1.56.0/25",
    "176.34.159.192/26",
    "177.71.207.128/26",
    "18.253.167.0/25",
    "18.253.167.128/25",
    "18.253.168.0/25",
    "2001:3fc6:100::/48",
    "2400:7fc0:83cc:cc00::/56",
    "2400:7fc0:83cc:cd00::/56",
    "2400:7fc0:83cc:ce00::/56",
    "2404:c2c0:83cc:cc00::/56",
    "2404:c2c0:83cc:cd00::/56",
    "2404:c2c0:83cc:ce00::/56",
    "2406:da14:7ff:f800::/56",
    "2406:da14:fff:f800::/56",
    "2406:da18:7ff:f800::/56",
    "2406:da18:fff:f800::/56",
    "2406:da1c:7ff:f800::/56",
    "2406:da1c:fff:f800::/56",
    "2600:1f14:7ff:f800::/56",
    "2600:1f14:fff:f800::/56",
    "2600:1f18:3fff:f800::/56",
    "2600:1f18:7fff:f800::/56",
    "2600:1f1c:7ff:f800::/56",
    "2600:1f1c:fff:f800::/56",
    "2600:1f1e:7ff:f800::/56",
    "2600:1f1e:fff:f800::/56",
    "2600:f0f0:300:100::/56",
    "2600:f0f0:30e::/48",
    "2600:f0f0:30f::/48",
    "2a05:d018:7ff:f800::/56",
    "2a05:d018:fff:f800::/56",
    "51.0.252.0/24",
    "52.80.197.0/25",
    "52.80.197.128/25",
    "52.80.198.0/25",
    "52.83.34.128/25",
    "52.83.35.0/25",
    "52.83.35.128/25",
    "54.183.255.128/26",
    "54.228.16.0/26",
    "54.232.40.64/26",
    "54.241.32.64/26",
    "54.243.31.192/26",
    "54.244.52.192/26",
    "54.245.168.0/26",
    "54.248.220.0/26",
    "54.250.253.192/26",
    "54.251.31.128/26",
    "54.252.254.192/26",
    "54.252.79.128/26",
    "54.255.254.192/26"
  ]
}