Bulk WHOIS API review
A focused API for structured WHOIS lookups, bulk processing, and asynchronous retrieval.
Reviewed by iTechGuides Editors · Editorial team · Updated Oct 2026
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.
Bulk WHOIS API pros and cons
- 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
Bulk WHOIS API fact sheet, pricing and score →
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