Find every subdomain
of a domain.

Every hostname under a domain that ever appeared in a public TLS certificate — with certificate counts, first/last seen and live DNS status.

69 hosts · 458 ms

HostCertsFirst seenLast seenDNS
rbauction.com 12 2025-06-12 2026-09-23 ok
*.rbauction.com 5 2025-09-26 2026-09-23 —
dc1vplsad01.rbauction.com 1 2026-04-16 2026-04-16 nxdomain
dc1cups01.rbauction.com 1 2025-12-12 2025-12-12 ok
www.dc1cups01.rbauction.com 1 2025-12-12 2025-12-12 nxdomain
dc2cups01.rbauction.com 1 2025-11-23 2025-11-23 ok
www.dc2cups01.rbauction.com 1 2025-11-23 2025-11-23 nxdomain
vg21.rbauction.com 1 2025-12-03 2025-12-03 ok
netstream2.rbauction.com 1 2025-11-07 2025-11-07 nxdomain
webapps2.rbauction.com 1 2026-04-16 2026-04-16 nxdomain
vga.rbauction.com 1 2025-12-03 2025-12-03 ok
mapi-qa.rbauction.com 1 2025-06-13 2025-06-13 nxdomain
cb.rbauction.com 1 2026-02-09 2026-02-09 nxdomain
red.rbauction.com 1 2025-06-13 2025-06-13 nxdomain
cloud.e.rbauction.com 4 2025-11-15 2025-11-18 ok
image.e.rbauction.com 2 2025-11-05 2026-01-05 ok
click.e.rbauction.com 3 2025-11-15 2025-11-15 ok
view.e.rbauction.com 4 2025-11-15 2025-11-17 ok
mobile.rbauction.com 2 2025-12-12 2026-04-13 ok
docusignstandalone.rbauction.com 3 2025-06-12 2026-01-13 ok
blue.rbauction.com 1 2025-06-13 2025-06-13 nxdomain
ref.rbauction.com 3 2026-01-08 2026-03-05 ok
blog.rbauction.com 7 2026-06-05 2026-09-17 ok
stash.rbauction.com 2 2026-03-05 2026-09-10 nxdomain
ritchiewiki.rbauction.com 2 2025-12-12 2026-04-13 ok
mi.rbauction.com 3 2026-06-09 2026-08-23 ok
api.rbauction.com 3 2025-06-12 2026-04-13 ok
red-api.rbauction.com 1 2025-06-13 2025-06-13 nxdomain
blue-api.rbauction.com 1 2025-06-13 2025-06-13 nxdomain
green-api.rbauction.com 1 2025-06-13 2025-06-13 ok
brown-api.rbauction.com 1 2025-06-13 2025-06-13 ok
mapi.rbauction.com 5 2025-06-13 2026-07-09 ok
callback.rbauction.com 2 2025-12-15 2026-02-09 ok
green-callback.rbauction.com 1 2025-06-13 2025-06-13 ok
brown-callback.rbauction.com 1 2025-06-13 2025-06-13 ok
click.rbauction.com 10 2026-04-23 2026-08-19 ok
cloud.email.rbauction.com 1 2025-12-24 2025-12-24 ok
image.email.rbauction.com 1 2025-11-05 2025-11-05 ok
m.rbauction.com 2 2025-12-12 2026-04-13 nxdomain
netstream.rbauction.com 1 2025-11-07 2025-11-07 ok
ssgtm.rbauction.com 5 2026-04-10 2026-09-18 ok
green.rbauction.com 1 2025-06-13 2025-06-13 ok
brown.rbauction.com 1 2025-06-13 2025-06-13 ok
bomgar.rbauction.com 1 2025-11-07 2025-11-07 nxdomain
ritchiespecs.rbauction.com 3 2025-06-13 2026-04-13 ok
analytics.rbauction.com 1 2025-11-27 2025-11-27 ok
green-analytics.rbauction.com 1 2025-06-13 2025-06-13 ok
brown-analytics.rbauction.com 1 2025-06-13 2025-06-13 ok
flipbooks.rbauction.com 4 2026-04-11 2026-08-09 ok
ns.rbauction.com 1 2025-11-07 2025-11-07 nxdomain
jenkins.rbauction.com 1 2025-08-22 2025-08-22 nxdomain
webapps.rbauction.com 1 2026-04-16 2026-04-16 nxdomain
careers.rbauction.com 2 2025-06-12 2025-06-13 ok
mapiuat.rbauction.com 2 2025-12-12 2026-04-13 nxdomain
wwwuat.rbauction.com 2 2025-12-12 2026-04-13 ok
origin-wwwuat.rbauction.com 1 2025-06-13 2025-06-13 nxdomain
analyticst.rbauction.com 1 2026-02-09 2026-02-09 nxdomain
ritchiespecs-test.rbauction.com 1 2025-06-13 2025-06-13 ok
mapitest.rbauction.com 4 2026-06-22 2026-10-02 ok
callbacktest.rbauction.com 2 2025-12-15 2026-02-09 ok
analyticstest.rbauction.com 2 2025-11-14 2025-12-15 ok
wwwtest.rbauction.com 1 2025-06-13 2025-06-13 ok
rbtableau.rbauction.com 1 2026-04-07 2026-04-07 ok
www.rbtableau.rbauction.com 1 2026-04-07 2026-04-07 nxdomain
callbackdev.rbauction.com 1 2025-12-15 2025-12-15 nxdomain
www.rbauction.com 3 2025-06-12 2026-04-13 ok
origin-www.rbauction.com 1 2025-06-12 2025-06-12 ok
r.www.rbauction.com 5 2026-05-24 2026-09-23 ok
jenkins-proxy.rbauction.com 1 2026-05-14 2026-05-14 ok

Programmatic access, with DNS A records: API GET /v1/hosts/rbauction.com (API key for paging).

Shown here: hostnames with a certificate that is valid now or expired within the last 90 days. The full history since 2013 — hostnames whose last certificate expired earlier — is a Pro plan method: GET /v1/hosts-history/rbauction.com.