WHOIS has been quietly dying for a decade, and most teams only noticed in the last eighteen months.
If you ran a domain-intelligence pipeline between 2015 and 2022, the story went like this. You shelled out to the whois binary, or hit a free public wrapper, or paid WhoisXML API $0.00099 per lookup. You wrote a parser full of regex special cases for Verisign vs. Afilias vs. Nominet vs. DENIC, caught the edge cases where .jp returned Shift-JIS, normalized the date formats, and shipped. It worked, barely.
Then two things happened at once. ICANN's RDAP mandate became compliance-enforced in August 2024, which broke the WHOIS TCP/43 endpoints for every gTLD registrar still pointing at them. And WhoisXML, along with most of its competitors, gated their free tiers into oblivion through 2024 and 2025 — first dropping the public 1,000-request-per-month plan, then requiring credit cards for evaluation, then pushing minimums into the low-four-figure range for any serious volume.
If your pipeline still calls whois example.com and greps the output, it is failing silently on somewhere between 30% and 60% of lookups right now. You haven't been paged because the failures are partial, the formats look superficially correct, and downstream consumers treat a missing expiration_date as "probably still valid."
