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NetworkCalc

DNS lookups, subnet math, and network tools over JSON

🔧 Developer ToolsHEALTHYchecked 1h ago
AUTH NONECORS ✓AGENT ✓HTTPS ✓COMMERCIAL ?

A keyless API covering DNS record lookups, IP and subnet calculations, and related networking utilities. The DNS endpoint returns A, MX, NS, TXT and other records in a single JSON payload. Separate account-only endpoints exist, but the core tools need no auth.

91HOW IT'S SCORED ⓘ
▶ Run liveDocs ↗
Status badge · for your READMEshipapis health badge: 91 · healthy
Uptime history
99.02%90 days
98.3%30 days
448P50 · ms
3976P95 · ms
operationalpartialdownno data
Response time · last 48 checks
Fastest 170 ms, slowest 1904 ms, most recent 326 ms.
Live response samplecaptured by our last successful check
GET https://networkcalc.com/api/dns/lookup/google.com

{
  "status": "OK",
  "hostname": "google.com",
  "records": {
    "A": [
      {
        "address": "142.250.72.14",
        "ttl": 7
      }
    ],
    "MX": [
      {
        "exchange": "smtp.google.com",
        "priority": 10
      }
    ],
    "NS": [
      {
        "nameserver": "ns1.google.com"
      }
    ]
  }
}
Call itcurl · fetch · python
curl "https://networkcalc.com/api/dns/lookup/google.com"
const res = await fetch("https://networkcalc.com/api/dns/lookup/google.com");
const data = await res.json();
console.log(data);
import requests

res = requests.get("https://networkcalc.com/api/dns/lookup/google.com")
print(res.json())
Endpoints · 5HealthyFULL DOCS ↗
Monitored path responding — GET /dns/lookup/google.com448 mschecked 1h ago
GET/dns/lookup/google.comPROBED

DNS lookups, subnet math, and network tools over JSON

GET/dns

Dns — documented GET route.

GET/dns/1

Dns details by ID (example: 1).

GET/dns?limit=10

Dns — documented GET route.

GET/dns/search?q=test

Search by query parameters.

Machine-readable spec

We probe a documented GET and expect 2xx JSON — full uptime and health score. Export includes every documented route below.

Response-shape history

Stable. No schema drift observed since monitoring began — the response shape has not changed under our checks.

NetworkCalc: common questions

Is NetworkCalc free to use?

Yes — NetworkCalc is a free developer tools API. Free tier: Free public API, no key. Whether the free tier allows commercial use is unclear — check the provider docs.

Does NetworkCalc need an API key?

No — NetworkCalc needs no API key or signup. You can call it straight away; rate limits still apply (Unpublished).

Can I call NetworkCalc from the browser?

Yes — NetworkCalc returns CORS headers over HTTPS, so front-end code can fetch it directly with no backend proxy. Use the fetch snippet on this page, or hit "Run live" to try it now.

Is NetworkCalc up right now?

As of our last scheduled check, NetworkCalc is healthy with 99.02% uptime over 90 days and a 448 ms median response. We re-probe it every sweep — the status badge and uptime chart above always show the latest.