DNS Blacklist Checker

Check whether a host or IP is listed on major spam blocklists.

Parameter	Type	Required	Description
`host`	string	Yes	IPv4 address or domain (resolved to its first IPv4 address).

Example request

curl "https://netsh.io/api/v1/dns-blacklist-checker?host=1.1.1.1&api_key=YOUR_API_KEY"

Example response

{
  "ok": true,
  "data": {
    "host": "1.1.1.1",
    "ip": "1.1.1.1",
    "resolvedFrom": null,
    "results": [
      { "zone": "zen.spamhaus.org", "name": "Spamhaus ZEN", "status": "clean" },
      { "zone": "bl.spamcop.net", "name": "SpamCop", "status": "clean" },
      { "zone": "b.barracudacentral.org", "name": "Barracuda Reputation", "status": "clean" }
      // ... 3 more zones
    ],
    "listedCount": 0,
    "ipv6Only": false
  },
  "meta": { "tool": "dns-blacklist-checker", "version": "v1" }
}