Compare DNS Resolvers API — Cross-Resolver Analysis

Description

Query the same domain across Google, Cloudflare, OpenDNS, Quad9, and other major public resolvers. See if they all return the same answer, detect discrepancies, and measure response times.

Useful for identifying DNS poisoning, CDN routing differences, or resolver-specific issues that cause inconsistent user experiences.

Use Cases

Detect DNS poisoning or manipulation
Compare CDN routing across resolvers
Identify resolver-specific issues
Benchmark resolver performance for your domain

Parameters

Name	Type	Required	Description
`domain`	string	Yes	Domain name to compare
`record_type`	string	No	Record type. Default: A
`format`	string	No	Response format: json or markdown

Example Request

bash

curl -H 'X-API-Key: YOUR_KEY' \
  'https://api.example.com/dns/compare-resolvers?domain=example.com'

python

import httpx

resp = httpx.get(
    "https://api.example.com/dns/compare-resolvers?domain=example.com",
    headers={"X-API-Key": "YOUR_KEY"},
)
print(resp.json())

javascript

const resp = await fetch("https://api.example.com/dns/compare-resolvers?domain=example.com", {
  headers: { "X-API-Key": "YOUR_KEY" },
});
const data = await resp.json();
console.log(data);

Example Response

json

{
  "domain": "example.com",
  "consistent": true,
  "resolvers": [
    {"name": "Google", "ip": "8.8.8.8", "response": ["93.184.216.34"], "latency_ms": 12},
    {"name": "Cloudflare", "ip": "1.1.1.1", "response": ["93.184.216.34"], "latency_ms": 8}
  ]
}

Compare DNS Resolvers

Description

Use Cases

Parameters

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