.pro
Availability-check reliability and the registry servers we query for .pro domains.
Our answer rate
Not enough data Generic- Answer rate
- 100.0% of attempted checks returned a definitive answer
- Check volume
- Minimal (coarse band, not a count)
- Mostly answered by
- DNS
- Still available
- 95.3% of answered .pro candidates were unregistered
- Last definitive answer
- 2026-09-21
Servers we query for .pro
Public registry infrastructure — a whois, a
dig NS pro, and one read of
IANA’s bootstrap file
return the same three values. Listed here for convenience.
- WHOIS host
- none — this registry publishes no WHOIS server
- Authoritative nameservers
-
a2.pro.afilias-nst.info199.182.32.1b0.pro.afilias-nst.org199.182.1.1b2.pro.afilias-nst.org199.182.40.1c0.pro.afilias-nst.info199.182.16.1d0.pro.afilias-nst.org199.182.17.1a0.pro.afilias-nst.info199.182.0.1 - RDAP endpoint
-
https://rdap.identitydigital.services/rdap/
What this measures: the share of our own availability checks that came back with a definitive answer. Nobody else publishes this, because nobody else is running bulk registry lookups at this scale and recording what came back.
What it does not measure: a registry’s uptime or quality. A low rate here can just as easily mean our requests are being rate-limited as it can mean anything about the registry itself.
These are current-state figures, not a history. We keep one record per domain, holding its most recent check — so a TLD that failed hundreds of times and then recovered reads as healthy here. A low rate means checks are failing now; a high one does not mean they always have.
Figures count domains checked, not queries — a domain checked six times counts once. Candidates we generated but never checked are excluded entirely; they are not failures. Snapshot rebuilt 2026-09-27 02:19:47.