WHOIS Lookup

Retrieve full domain registration records — owner, registrar, creation date, expiry, and nameservers.

Thread Pool Routing

WHOIS queries run over raw TCP connections that block the network thread. We route each lookup into Python's AsyncIO thread pool, so the API server never stalls — even under millions of simultaneous queries.

Queued Bulk Processing

Bulk domain lists are accepted by the API and dispatched to background worker queues. Workers process domains sequentially while multiple worker instances run in parallel, preventing registry rate-limits from crashing jobs.

Frequently Asked Questions

WHOIS is a protocol that queries official internet registries to retrieve the public registration records of a domain name. It reveals who registered the domain, when it was registered, when it expires, and which nameservers it uses.

WHOIS operates over a raw TCP connection on port 43, which is completely inaccessible to web browsers due to network security sandboxes. Our tool routes the query through our secure Python backend for accurate results.

We use Python's AsyncIO to run the WHOIS query in a background thread so it never blocks our API server. This allows millions of simultaneous lookups without any performance degradation.

Bulk CSV files are uploaded to a Redis-backed worker queue. Jobs are processed sequentially per worker instance, and multiple worker instances run in parallel to maximize throughput without exhausting memory.