Bulk WHOIS API
Bulk WHOIS API: A focused API for structured WHOIS lookups, bulk processing, and asynchronous retrieval. Ranked #15 of 27 in WHOIS Lookup Tools by our editors (7.1/10); pricing: 14-day trial; best for developers needing asynchronous bulk WHOIS.
At a glance
- Editor score7.1 / 10
- Pricing14-day trial
- Best forDevelopers needing asynchronous bulk WHOIS
- Free planNo
- Paid from$9.99/mo
- API accessFull
- Facts checked22 Sep 2026
Where it wins
- Parsed JSON responses for domain and IP address queries
- Asynchronous callbacks, polling, and bulk request processing
- Documented C#, PHP, and JavaScript implementation examples
Where it doesn't
- Paid subscriptions start at $9.99 per month
- The 14-day trial is limited to 500 WHOIS requests
- Each monthly plan has a defined request allowance
Our verdict on Bulk WHOIS API
Bulk WHOIS API provides parsed WHOIS data through an API for companies and online projects. It supports domain and IP address queries and returns structured JSON responses, making it suited to developers who need to integrate WHOIS lookups into software or process requests in batches. The service is available through web and API access, with API key and secret authentication. Its published examples cover C#, PHP, and JavaScript, giving teams reference points for implementation in those environments.
The request workflow is a notable strength. Synchronous API requests support immediate processing, while asynchronous requests enable bulk querying. Results can be handled through callback processing or retrieved with polling mode. This gives developers options for workflows that do not need every lookup handled in a single immediate response. Parsed JSON also provides a consistent response format for applications that need to work with domain or IP WHOIS results programmatically.
Pricing is monthly and plan-based. The Small plan costs $9.99 per month for 3,000 requests, Medium costs $29.99 for 18,000 requests, Large costs $99.99 for 70,000 requests, and Enterprise costs $299.99 for 250,000 requests. A 14-day trial provides 500 WHOIS requests, while the subscriptions are paid plans and prices are shown before VAT. Bulk WHOIS API is a practical fit for developers building automated or asynchronous WHOIS workflows, particularly when documented language examples and multiple result-handling modes matter. Teams seeking a continuing free plan or request volumes outside the published allowances should consider how the monthly tiers fit their workload before choosing it.
Your product? Our editors can test Bulk WHOIS API in depth and publish a review, labelled as paid · from $149/mo →
Bulk WHOIS API pricing
All 4 Bulk WHOIS API plans and prices →
Bulk WHOIS API fact sheet
| Free plan | No |
|---|---|
| Paid from | $9.99/mo |
| API access | Full |
| Bulk lookup | Yes |
| Historical WHOIS | Not verified |
| RDAP support | Not verified |
| Monthly lookup limit | 3000 /mo |
| Export formats | JSON |
| Free trial | 14 days · no card needed |
| Deployment | Cloud |
| Platforms | Web |
| Support | Email, Docs |
| Built for | Small business, Mid-market, Enterprise (editorial estimate) |
| Pricing | 14-day trial (source) |
| Website | bulk-whois-api.com |
| Facts checked | 22 Sep 2026 |
Alternatives to Bulk WHOIS API
- WhoisDataCenterA broad WHOIS research service with useful free allowances and paid data products.9.4
- WhoisXML API WHOIS APIA broad lookup API with RDAP, parsed data, integrations, and a free tier.9.2
- WhoxyA pay-as-you-go WHOIS platform for high-volume lookups, history, reverse search, and datasets.9.0
See all Bulk WHOIS API alternatives →
Used Bulk WHOIS API? Be the first to review it
The editor score above is our own research. What this page doesn't have yet is a reader's view — what you used Bulk WHOIS API for, what worked and what didn't. No stars are seeded and no review is paid for; an editor reads every one before it appears.
Write a reviewTwo minutes · verified accounts only · read by an editor before it appears
Featured on iTechGuides
Bulk WHOIS API is listed in our WHOIS Lookup Tools directory. Add the badge to your site — it links back to this page.
<a href="https://www.itechguides.com/products/bulk-whois-api/"><img src="https://www.itechguides.com/best/badge/bulk-whois-api.svg" alt="Featured on iTechGuides" width="230" height="46"></a>
Reviewed by iTechGuides Editors · Editorial team · Updated Oct 2026
Advertiser disclosure: iTechGuides is reader-supported. Vendors can pay for top positions in our rankings and for a place on other products' pages, and we may earn a commission when you click some links. Bought places stand at the number bought; this page and our disclosure say so. Paying vendors may get a fuller, more detailed review from our editors, and that review can change their score. How we rank.
Last updated · How we research and update