# HackerTarget, free: Domain WHOIS API

> Perform an Online Whois Lookup of a domain or IP address to find the registered owner, netblock, ASN and registration dates.

HackerTarget's domain WHOIS API on its Free plan. It costs $0.00 per 1,000 domains. HackerTarget's docs list 8 of the 9 fields on our checklist: Registrant, Registrar, Created on, Updated on, Expires on, Name servers, Statuses, DNSSEC.
We haven't run HackerTarget through [our domain WHOIS API benchmark](https://datacircle.dev/best-domain-whois-api.txt) yet.
This plan is free. We rank 316 plans for domain WHOIS APIs by price. Half the plans cost $1.495 per 1,000 domains or less. [See the best free domain WHOIS API plan.](https://datacircle.dev/best-domain-whois-api.txt)
[Searchwire's $10 pack](https://datacircle.dev/domain-whois-apis/searchwire/10-pack/llms.txt) is the cheapest paid plan per 1,000 domains. Searchwire's domain WHOIS API costs nothing beyond the plan price.
[Robtex](https://datacircle.dev/domain-whois-apis/robtex/free/llms.txt), [DomScan](https://datacircle.dev/domain-whois-apis/domscan/6-monthly-starter-post-v1-whois-bulk/llms.txt) and [WhoisFreaks](https://datacircle.dev/domain-whois-apis/whoisfreaks/200-monthly-monthly-subscription-150000-api-credits-post-v2-0-bulkwhois-live/llms.txt) are the best domain WHOIS API providers in the Datacircle benchmark.

- This page: https://datacircle.dev/domain-whois-apis/hackertarget/free
- [Domain WHOIS API: the 13 best providers compared](https://datacircle.dev/best-domain-whois-api.txt)
- Get it: https://hackertarget.com/scan-membership/?utm_source=datacircle.dev&utm_medium=referral&utm_campaign=domain-whois-api-pricing
- Request: `GET https://api.hackertarget.com/whois/`
- API key: with the plan, on https://hackertarget.com/scan-membership/?utm_source=datacircle.dev&utm_medium=referral&utm_campaign=domain-whois-api-pricing
- Its API docs: https://hackertarget.com/whois-lookup/?utm_source=datacircle.dev&utm_medium=referral&utm_campaign=domain-whois-api-pricing
- Sold by: HackerTarget (https://hackertarget.com?utm_source=datacircle.dev&utm_medium=referral&utm_campaign=domain-whois-api-pricing)
- Checked: 2026-11-04

## In the answer

- Completeness: 89%
- Registrant: ✓
- Registrar: ✓
- Created on: ✓
- Updated on: ✓
- Expires on: ✓
- Name servers: ✓
- Statuses: ✓
- DNSSEC: ✓

## Price

- $ per 1,000 domains: $0.00
- Per: call
- Billing: free

## Charges

- Also pays for: from the same budget: MTR Traceroute · Test Ping · DNS Lookup · Reverse DNS · Host Search · Zone Transfer · IP Geolocation · Reverse IP · TCP Port Scan · UDP Port Scan · Subnet Lookup · AS Lookup · Banner Search · HTTP Headers · Page Links

## Not found

- $ per 1,000: $0.00

## In their words

- Their pitch: Perform an Online Whois Lookup of a domain or IP address to find the registered owner, netblock, ASN and registration dates.

## Data

- Freshness: live
- Keep data: not without express written permission
- Use data: "If you are in the business of creating similar documents, goods or services for the purpose of providing them for a fee to users, whether they be business users or domestic users, then you are a competitor of HackerTarget.com. HackerTarget.com expressly excludes and does not permit you to use or access its website, to download any documents or information from its website or obtain any such documents or information through a third party." [...] "Any redistribution or reproduction of part or all of the contents in any form is prohibited other than the following: you may print or download to a local hard disk extracts for your personal and non-commercial use only, and you may copy the content to individual third parties for their personal use, but only if you acknowledge the website as the source of the material." [...] "You may not, except with our express written permission, distribute or commercially exploit the content. Nor may you transmit it or store it in any other website or other form of electronic retrieval system."

## Plan

- Pay: $0
- You get: 5 requests a day
- Enough for: 5 calls a day

## Rate limit

- Per day: 5
- Per second: 2
- Batch: 1

## Speed

- Answer: in the call

## The call

- You send: q
- Method: GET
- Path: /whois/

## About the plan

- Plan: Free
- Who can get it: anyone, no sign-up, from a single IP

## The 19 fields the plan's answer can hold

domain name, creation date, updated date, expiration date, DNSSEC, nameservers, status, WHOIS server, referral URL, registrar name, registrant name, registrant organization, registrant street address, registrant city, registrant region, registrant country, registrant ZIP code, emails, raw WHOIS data

## HackerTarget's plans (8)

- [HackerTarget, free](https://datacircle.dev/domain-whois-apis/hackertarget/free/llms.txt): $0.00 per 1,000, 89% complete, live
- [HackerTarget, $250 pack](https://datacircle.dev/domain-whois-apis/hackertarget/250-pack/llms.txt): $2.50 per 1,000, 89% complete, live
- [HackerTarget, $120 yearly](https://datacircle.dev/domain-whois-apis/hackertarget/120-yearly/llms.txt): $0.657 per 1,000, 89% complete, live
- [HackerTarget, $300 yearly](https://datacircle.dev/domain-whois-apis/hackertarget/300-yearly/llms.txt): $0.822 per 1,000, 89% complete, live
- [HackerTarget, $600 yearly](https://datacircle.dev/domain-whois-apis/hackertarget/600-yearly/llms.txt): $0.822 per 1,000, 89% complete, live
- [HackerTarget, $1,200 yearly](https://datacircle.dev/domain-whois-apis/hackertarget/1200-yearly/llms.txt): $0.438 per 1,000, 89% complete, live
- [HackerTarget, $2,400 yearly](https://datacircle.dev/domain-whois-apis/hackertarget/2400-yearly/llms.txt): $0.329 per 1,000, 89% complete, live
- [HackerTarget, contact us](https://datacircle.dev/domain-whois-apis/hackertarget/contact-us/llms.txt): 89% complete, live

## HackerTarget's calls (1)

- `GET /whois/`: [HackerTarget, free](https://datacircle.dev/domain-whois-apis/hackertarget/free/llms.txt)

## HackerTarget's APIs (1)

- [HackerTarget: domain WHOIS API pricing, 8 plans](https://datacircle.dev/domain-whois-apis/hackertarget/free/llms.txt)

## HackerTarget: domain WHOIS API alternatives

- [Enterno, ₽299 monthly](https://datacircle.dev/domain-whois-apis/enterno/299-monthly/llms.txt): $0.238 per 1,000, 89% complete, live
- [domainIQ, $149.95 monthly, Expert, GET /api, 15,000 requests a day](https://datacircle.dev/domain-whois-apis/domainiq/149-95-monthly-expert-get-api-15000-requests-a-day/llms.txt): $0.333 per 1,000, 56% complete, live
- [Whoxy, $10,000 pack](https://datacircle.dev/domain-whois-apis/whoxy/10000-pack/llms.txt): $0.40 per 1,000, 78% complete, live
- [WhoisFreaks, $2,700 monthly, Monthly Subscription, 3,000,000 API Credits, POST /v2.0/bulkwhois/live](https://datacircle.dev/domain-whois-apis/whoisfreaks/2700-monthly-monthly-subscription-3000000-api-credits-post-v2-0-bulkwhois-live/llms.txt): $0.90 per 1,000, 100% complete, live

## Sources

From each provider's own pricing page and docs, and from what providers tell us. We read this row from these pages on 2026-11-04.

- https://hackertarget.com?utm_source=datacircle.dev&utm_medium=referral&utm_campaign=domain-whois-api-pricing
- https://hackertarget.com/enterprise/?utm_source=datacircle.dev&utm_medium=referral&utm_campaign=domain-whois-api-pricing
- https://hackertarget.com/ip-tools/?utm_source=datacircle.dev&utm_medium=referral&utm_campaign=domain-whois-api-pricing
- https://hackertarget.com/scan-membership/?utm_source=datacircle.dev&utm_medium=referral&utm_campaign=domain-whois-api-pricing
- https://hackertarget.com/terms/?utm_source=datacircle.dev&utm_medium=referral&utm_campaign=domain-whois-api-pricing
- https://hackertarget.com/whois-lookup/?utm_source=datacircle.dev&utm_medium=referral&utm_campaign=domain-whois-api-pricing