.com
Availability-check reliability and the registry servers we query for .com domains.
Our answer rate
Good Generic- Answer rate
- 100.0% of attempted checks returned a definitive answer
- Check volume
- High (coarse band, not a count)
- Mostly answered by
- DNS
- Still available
- 56.1% of answered .com candidates were unregistered
- Last definitive answer
- 2026-09-25
Servers we query for .com
Public registry infrastructure — a whois, a
dig NS com, and one read of
IANA’s bootstrap file
return the same three values. Listed here for convenience.
- WHOIS host
-
whois.verisign-grs.com - Authoritative nameservers
-
g.gtld-servers.net192.42.93.30h.gtld-servers.net192.54.112.30i.gtld-servers.net192.43.172.30j.gtld-servers.net192.48.79.30k.gtld-servers.net192.52.178.30l.gtld-servers.net192.41.162.30m.gtld-servers.net192.55.83.30a.gtld-servers.net192.5.6.30b.gtld-servers.net192.33.14.30c.gtld-servers.net192.26.92.30d.gtld-servers.net192.31.80.30e.gtld-servers.net192.12.94.30f.gtld-servers.net192.35.51.30 - RDAP endpoint
-
https://rdap.verisign.com/com/v1/
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.