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.

37 hosts · 329 ms

HostCertsFirst seenLast seenDNS
allegro.pl 7 2025-08-14 2026-08-12 ok
*.allegro.pl 4 2025-08-14 2026-08-12 —
mail2.allegro.pl 1 2026-06-17 2026-06-17 ok
media.allegro.pl 3 2025-09-16 2026-09-14 ok
*.media.allegro.pl 3 2025-09-16 2026-09-14 —
rtb.allegro.pl 1 2026-04-27 2026-04-27 nodata
*.rtb.allegro.pl 1 2026-04-27 2026-04-27 —
upload.allegro.pl 5 2025-08-15 2026-09-03 ok
edge.allegro.pl 5 2025-08-15 2026-09-03 ok
auth.wakacje.allegro.pl 1 2026-04-15 2026-04-15 nxdomain
edge.enterprise.allegro.pl 1 2025-08-15 2025-08-15 nxdomain
img.marketing.allegro.pl 2 2025-07-24 2026-07-23 nxdomain
redir.marketing.allegro.pl 2 2025-07-24 2026-07-23 nxdomain
charytatywni.allegro.pl 2 2025-07-23 2026-07-23 ok
api.charytatywni.allegro.pl 2 2025-07-23 2026-07-23 ok
www.api.charytatywni.allegro.pl 1 2026-07-23 2026-07-23 nxdomain
www.charytatywni.allegro.pl 2 2025-07-23 2026-07-23 ok
api.allegro.pl 5 2025-08-15 2026-09-03 ok
outlook.allegro.pl 1 2026-06-17 2026-06-17 nxdomain
mail.allegro.pl 1 2026-06-17 2026-06-17 ok
developer.allegro.pl 5 2025-08-15 2026-09-03 ok
*.developer.allegro.pl 5 2025-08-15 2026-09-03 —
apps.developer.allegro.pl 1 2025-10-21 2025-10-21 ok
*.apps.developer.allegro.pl 1 2025-10-21 2025-10-21 —
autodiscover.allegro.pl 1 2026-06-17 2026-06-17 ok
cs.allegro.pl 1 2026-04-16 2026-04-16 ok
ads.allegro.pl 2 2025-07-08 2026-07-08 ok
www.ads.allegro.pl 2 2025-07-08 2026-07-08 ok
img.ams.allegro.pl 2 2025-07-24 2026-07-23 nxdomain
redir.ams.allegro.pl 2 2025-07-24 2026-07-23 nxdomain
img.notifications.allegro.pl 2 2025-07-24 2026-07-23 nxdomain
redir.notifications.allegro.pl 2 2025-07-24 2026-07-23 nxdomain
business.allegro.pl 1 2026-02-17 2026-02-17 ok
*.business.allegro.pl 1 2026-02-17 2026-02-17 —
upload.business.allegro.pl 1 2025-12-23 2025-12-23 ok
edge.business.allegro.pl 1 2025-12-23 2025-12-23 ok
alior.credit-application-dev.allegro.pl 1 2026-05-15 2026-05-15 nxdomain

Programmatic access, with DNS A records: API GET /v1/hosts/allegro.pl (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/allegro.pl.