Perform PTR (reverse DNS) lookups.

Accepts an IPv4/IPv6 address and returns the reported hostname plus aliases. Drop this helper wherever you want to perform PTR (reverse DNS) lookups with a single HTTP call. Send the documented inputs and the API streams back polished results you can hand directly to your users.

GETPOST/dns/reverse-lookup

Where this helper shines

Perform PTR (reverse DNS) lookups. keeps dns helpers on autopilot. Use it whenever you need to perform PTR (reverse DNS) lookups without pausing a sprint or asking design/dev to jump in.

Trigger this helper whenever you need to perform PTR (reverse DNS) lookups without waiting on a full deploy.
Drop it into automations (Zapier, Make, workers) to perform PTR (reverse DNS) lookups as part of your workflow.
Share the GET URL so support and success can perform PTR (reverse DNS) lookups safely using their Dataczar API key.

Copy & ship snippets

GET

Instant link

GET https://api.dataczar.app/dns/reverse-lookup?ip=sample-ip&dryrun=true&ak=demo

Open directly in any browser, webhook, or low-code workflow.

curl

curl GET

curl "https://api.dataczar.app/dns/reverse-lookup?ip=sample-ip&dryrun=true&ak=demo"

Swap ak=demo with your Dataczar API key.

curl

curl POST

curl -X POST "https://api.dataczar.app/dns/reverse-lookup?ak=demo" \
  -H 'Content-Type: application/json' \
  -d '{
  "ip": "sample-ip",
  "dryrun": "true"
}'

Send JSON payloads from back-end jobs, queues, or workers.

Parameters

Query Parameters

Name	Type	Description
ip	string · required
dryrun	boolean

All helper calls accept your Dataczar key via the ak query parameter. Need one? Create or copy a key on Dataczar Connect and drop it into each request.

Responses

Status 200

JSON payload with `hostname` and `aliases`.

Examples

API key

HTTP method

Query parameters

ip requireddryrun optional

Equivalent curl

Grab your Dataczar API key

Every helper runs with the same simple API key. Sign in (or create a free Dataczar account) at Dataczar Connect to issue keys in seconds, then drop the key into any `ak=` parameter and start shipping.

Get your API key Browse helpers

Tip: reuse the same key across these helpers, or rotate keys per project from the Connect dashboard.