Find every subdomain
of a domain.

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

60 hosts · 340 ms

HostCertsFirst seenLast seen
web.de 2 2026-03-11 2026-08-17
*.web.de 2 2026-03-11 2026-08-17
i0.web.de 1 2025-12-18 2025-12-18
dhmx01.web.de 1 2026-01-08 2026-01-08
mx-ha02.web.de 1 2026-01-08 2026-01-08
dhmx02.web.de 1 2026-01-08 2026-01-08
mx-ha03.web.de 1 2026-01-08 2026-01-08
pop3.web.de 1 2025-11-18 2025-11-18
dpag-service-qa.web.de 2 2025-10-14 2026-09-03
verify.login-qa.web.de 1 2026-01-08 2026-01-08
cad.web.de 2 2025-10-14 2026-09-02
*.cad.web.de 2 2025-10-14 2026-09-02
red.web.de 1 2026-03-03 2026-03-03
*.red.web.de 1 2026-03-03 2026-03-03
ident-eid.web.de 1 2026-06-10 2026-06-10
mout-xforward.web.de 1 2025-11-18 2025-11-18
dpag-service.web.de 2 2025-10-14 2026-09-03
mout-bounce.web.de 1 2025-11-18 2025-11-18
hilfe.web.de 1 2026-03-03 2026-03-03
www.hilfe.web.de 1 2026-03-03 2026-03-03
mailxchange.web.de 2 2025-08-05 2025-11-11
suche.web.de 1 2026-03-03 2026-03-03
*.suche.web.de 1 2026-03-03 2026-03-03
kundenportal.energie.web.de 1 2025-08-05 2025-08-05
www.energie.web.de 1 2025-10-14 2025-10-14
navigator-pre.web.de 1 2026-03-03 2026-03-03
*.navigator-pre.web.de 1 2026-03-03 2026-03-03
produkte.web.de 1 2026-02-03 2026-02-03
www.produkte.web.de 1 2026-02-03 2026-02-03
webdav-pre.smartdrive.web.de 2 2025-10-14 2026-09-02
www.webdav-pre.smartdrive.web.de 2 2025-10-14 2026-09-02
webdav.smartdrive.web.de 1 2025-11-18 2025-11-18
img.web.de 1 2025-12-18 2025-12-18
*.1.damoh.web.de 1 2026-03-03 2026-03-03
*.2.damoh.web.de 1 2026-03-03 2026-03-03
*.3.damoh.web.de 1 2026-03-03 2026-03-03
dl.web.de 1 2025-12-18 2025-12-18
hilfe.freemail.web.de 2 2025-10-14 2026-09-02
www.hilfe.freemail.web.de 2 2025-10-14 2026-09-02
esim.web.de 2 2025-08-05 2026-07-07
*.esim.web.de 2 2025-08-05 2026-07-07
newsroom.web.de 2 2025-07-11 2026-07-01
baustelle.maildomain.web.de 2 2025-10-14 2026-09-02
www.baustelle.maildomain.web.de 2 2025-10-14 2026-09-02
verify.login.web.de 1 2026-01-08 2026-01-08
phpmyadmin.web.de 1 2025-12-08 2025-12-08
www.phpmyadmin.web.de 1 2025-12-08 2025-12-08
www.lotto.web.de 1 2026-02-03 2026-02-03
imap.web.de 1 2025-11-18 2025-11-18
smtp.web.de 1 2025-11-18 2025-11-18
dhsmtp.web.de 1 2026-01-08 2026-01-08
navigator.web.de 2 2026-03-03 2026-08-12
*.navigator.web.de 2 2026-03-03 2026-08-12
js.web.de 1 2025-12-18 2025-12-18
mta-sts.web.de 2 2026-03-11 2026-08-17
kontakt.web.de 1 2026-03-03 2026-03-03
www.kontakt.web.de 1 2026-03-03 2026-03-03
mout.web.de 1 2025-11-18 2025-11-18
v.web.de 1 2025-12-18 2025-12-18
mx.web.de 1 2026-01-08 2026-01-08

Programmatic access: API GET /v1/hosts/web.de (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/web.de.