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.

76 hosts · 387 ms

HostCertsFirst seenLast seenDNS
sayuncle.com 32 2026-04-16 2026-08-30 ok
*.sayuncle.com 16 2026-04-16 2026-08-14 —
api2.sayuncle.com 14 2026-05-02 2026-08-28 ok
approval2.sayuncle.com 20 2026-05-02 2026-08-28 ok
stage1-auth3.sayuncle.com 2 2026-09-09 2026-09-09 ok
stage1-api3.sayuncle.com 2 2026-09-09 2026-09-09 ok
stage1-members3.sayuncle.com 2 2026-09-09 2026-09-09 ok
pzq7xn4.sayuncle.com 4 2026-04-20 2026-08-16 ok
ma-store-stage5.sayuncle.com 18 2026-05-13 2026-09-08 ok
stage5-ma.sayuncle.com 14 2026-05-13 2026-09-08 ok
stage-ma.sayuncle.com 20 2026-05-02 2026-08-28 ok
pb.sayuncle.com 20 2026-05-04 2026-08-30 ok
stage-pb.sayuncle.com 12 2026-05-02 2026-08-29 ok
ma-store-stage.sayuncle.com 16 2026-05-02 2026-08-28 ok
approval-core.sayuncle.com 16 2026-04-18 2026-08-14 ok
ma-store.sayuncle.com 18 2026-05-03 2026-08-30 ok
auth.sayuncle.com 16 2026-05-03 2026-08-29 ok
stage1-auth.sayuncle.com 14 2026-05-26 2026-09-21 ok
stage5-auth.sayuncle.com 16 2026-05-14 2026-09-09 ok
stage-auth.sayuncle.com 4 2026-05-02 2026-05-02 nxdomain
stage1-ma-api.sayuncle.com 14 2026-05-26 2026-09-21 ok
stage5-ma-api.sayuncle.com 16 2026-05-13 2026-09-08 ok
stage-ma-api.sayuncle.com 4 2026-05-04 2026-05-04 nxdomain
ssk.sayuncle.com 14 2026-05-10 2026-09-06 ok
approval.sayuncle.com 14 2026-05-02 2026-08-28 ok
*.mail.sayuncle.com 14 2026-04-08 2026-10-02 —
16898800.mail.sayuncle.com 10 2026-04-13 2026-08-09 ok
url5920.mail.sayuncle.com 15 2026-04-14 2026-08-10 ok
url3970.mail.sayuncle.com 9 2026-04-12 2026-08-08 ok
19532890.mail.sayuncle.com 8 2026-04-12 2026-08-08 ok
19534001.mail.sayuncle.com 18 2026-04-12 2026-08-09 ok
url6592.mail.sayuncle.com 16 2026-04-13 2026-08-10 ok
url5913.mail.sayuncle.com 14 2026-04-13 2026-08-09 ok
19533933.mail.sayuncle.com 15 2026-04-12 2026-08-08 ok
19533873.mail.sayuncle.com 12 2026-04-13 2026-08-09 ok
20244834.mail.sayuncle.com 8 2026-04-12 2026-08-08 ok
19534164.mail.sayuncle.com 12 2026-04-13 2026-08-09 ok
url1494.mail.sayuncle.com 8 2026-04-12 2026-08-08 ok
url9694.mail.sayuncle.com 16 2026-04-12 2026-08-08 ok
url5005.mail.sayuncle.com 16 2026-04-12 2026-08-08 ok
url5515.mail.sayuncle.com 14 2026-04-12 2026-08-08 ok
19534365.mail.sayuncle.com 14 2026-04-12 2026-08-08 ok
19534085.mail.sayuncle.com 14 2026-04-12 2026-08-08 ok
url3226.mail.sayuncle.com 14 2026-04-12 2026-08-08 ok
17412546.mail.sayuncle.com 16 2026-04-12 2026-08-08 ok
19534257.mail.sayuncle.com 14 2026-04-14 2026-08-10 ok
url3277.mail.sayuncle.com 8 2026-04-12 2026-08-08 ok
url178.mail.sayuncle.com 14 2026-04-14 2026-08-10 ok
35510919.mail.sayuncle.com 10 2026-04-13 2026-08-10 ok
20886449.mail.sayuncle.com 16 2026-04-12 2026-08-08 ok
url859.mail.sayuncle.com 16 2026-04-13 2026-08-10 ok
url2589.mail.sayuncle.com 14 2026-04-13 2026-08-10 ok
stream.sayuncle.com 13 2026-05-02 2026-08-28 ok
ma-store-green.sayuncle.com 16 2026-05-31 2026-09-26 ok
join.sayuncle.com 12 2026-05-03 2026-08-29 ok
app.sayuncle.com 22 2026-05-03 2026-08-31 ok
metrics.sayuncle.com 6 2026-06-17 2026-08-15 ok
downloads.sayuncle.com 20 2026-05-02 2026-08-28 ok
stage-downloads.sayuncle.com 16 2026-05-03 2026-08-29 ok
mails.sayuncle.com 23 2026-05-06 2026-09-05 ok
*.mails.sayuncle.com 15 2026-05-06 2026-09-05 —
members.sayuncle.com 21 2026-05-02 2026-08-28 ok
stage1-members.sayuncle.com 16 2026-05-26 2026-09-21 ok
stage2-members.sayuncle.com 12 2026-05-03 2026-08-29 ok
stage3-members.sayuncle.com 10 2026-05-02 2026-08-28 ok
stage4-members.sayuncle.com 18 2026-05-02 2026-09-21 ok
stage5-members.sayuncle.com 16 2026-05-13 2026-09-08 ok
stage-members.sayuncle.com 21 2026-05-03 2026-09-22 ok
cart.sayuncle.com 31 2026-04-25 2026-10-02 ok
*.cart.sayuncle.com 20 2026-04-25 2026-10-02 —
*.support.sayuncle.com 10 2026-04-16 2026-08-12 —
url7852.support.sayuncle.com 12 2026-04-17 2026-08-13 ok
www.sayuncle.com 16 2026-05-04 2026-08-30 ok
go.www.sayuncle.com 5 2026-05-10 2026-09-05 ok
notify.sayuncle.com 24 2026-04-27 2026-09-26 ok
*.notify.sayuncle.com 14 2026-04-27 2026-09-26 —

Programmatic access, with DNS A records: API GET /v1/hosts/sayuncle.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/sayuncle.com.