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.

100 hosts (first page) · 394 ms

HostCertsFirst seenLast seenDNS
tkc.co.jp 9 2025-07-08 2026-09-07 nodata
*.tkc.co.jp 19 2025-07-08 2026-10-05 —
tiscsorry2026-01.tkc.co.jp 2 2026-09-14 2026-10-05 nodata
tisccheck-zab01.tkc.co.jp 10 2026-05-17 2026-10-05 ok
tiscsorry01.tkc.co.jp 8 2026-05-17 2026-08-31 nodata
slapi1.tkc.co.jp 2 2025-09-25 2026-08-25 ok
tiscsorry2026-02.tkc.co.jp 2 2026-09-14 2026-10-05 nodata
tisccheck-zab02.tkc.co.jp 10 2026-05-17 2026-10-05 ok
tiscsorry02.tkc.co.jp 8 2026-05-17 2026-08-31 nodata
slapi2.tkc.co.jp 2 2025-09-28 2026-08-28 ok
tisccheck-zab03.tkc.co.jp 10 2026-05-17 2026-10-05 ok
tisccheck-zab04.tkc.co.jp 10 2026-05-17 2026-10-05 ok
*.acc-tkcdoc.tkc.co.jp 1 2026-06-23 2026-06-23 —
*.dev-tkcdoc.tkc.co.jp 1 2026-06-23 2026-06-23 —
*.tkcdoc.tkc.co.jp 2 2026-08-21 2026-08-21 —
ctsstgdwnld.tkc.co.jp 2 2025-10-21 2026-09-20 ok
isodwnld.tkc.co.jp 3 2026-04-26 2026-09-26 ok
ctsdwnld.tkc.co.jp 3 2025-10-21 2026-09-20 ok
ctsupld.tkc.co.jp 2 2025-09-28 2026-08-28 ok
*.acc-etd.tkc.co.jp 3 2026-02-13 2026-08-02 —
api.acc-etd.tkc.co.jp 2 2026-02-13 2026-02-13 ok
*.api.acc-etd.tkc.co.jp 11 2026-02-13 2026-08-03 —
*.dev-etd.tkc.co.jp 4 2026-02-16 2026-08-02 —
*.api.dev-etd.tkc.co.jp 2 2026-02-16 2026-02-16 —
*.etd.tkc.co.jp 6 2026-03-24 2026-08-24 —
*.api.etd.tkc.co.jp 3 2026-03-26 2026-08-26 —
niswebap1.staff.tkc.co.jp 3 2026-05-08 2026-07-24 nxdomain
armsbillop1.staff.tkc.co.jp 6 2025-07-28 2026-07-24 nxdomain
aa12.staff.tkc.co.jp 7 2025-07-08 2026-07-24 nxdomain
sidb2.staff.tkc.co.jp 7 2025-07-08 2026-07-24 nxdomain
lgweb2.staff.tkc.co.jp 4 2025-11-20 2026-07-24 nxdomain
armsweb2.staff.tkc.co.jp 5 2025-10-09 2026-07-24 nxdomain
keiri2.staff.tkc.co.jp 3 2026-05-08 2026-07-24 nxdomain
armsap2.staff.tkc.co.jp 6 2025-07-28 2026-07-24 nxdomain
certjump2.staff.tkc.co.jp 3 2026-05-08 2026-07-24 nxdomain
armsbillop2.staff.tkc.co.jp 6 2025-07-28 2026-07-24 nxdomain
armsop2.staff.tkc.co.jp 5 2025-10-09 2026-07-24 nxdomain
epos2.staff.tkc.co.jp 3 2026-05-08 2026-07-24 nxdomain
webflex2.staff.tkc.co.jp 7 2025-07-08 2026-07-24 nxdomain
armsbillop3.staff.tkc.co.jp 6 2025-07-28 2026-07-24 nxdomain
lgarms3.staff.tkc.co.jp 4 2025-11-20 2026-07-24 nxdomain
sfaesmana.staff.tkc.co.jp 7 2025-07-08 2026-07-24 nxdomain
ahqa.staff.tkc.co.jp 7 2025-07-08 2026-07-24 nxdomain
lhqa.staff.tkc.co.jp 7 2025-07-08 2026-07-24 nxdomain
asqa.staff.tkc.co.jp 7 2025-07-08 2026-07-24 nxdomain
lsqa.staff.tkc.co.jp 7 2025-07-08 2026-07-24 nxdomain
atqa.staff.tkc.co.jp 7 2025-07-08 2026-07-24 nxdomain
ltqa.staff.tkc.co.jp 7 2025-07-08 2026-07-24 nxdomain
tisc-web.staff.tkc.co.jp 7 2025-07-08 2026-07-24 nxdomain
sfaweb.staff.tkc.co.jp 7 2025-07-08 2026-07-24 nxdomain
sfaesmweb.staff.tkc.co.jp 7 2025-07-08 2026-07-24 nxdomain
kji-md.staff.tkc.co.jp 7 2025-07-08 2026-07-24 nxdomain
vmperformance.staff.tkc.co.jp 7 2025-07-08 2026-07-24 nxdomain
tkc-heartcore.staff.tkc.co.jp 7 2025-07-08 2026-07-24 nxdomain
ikuei.staff.tkc.co.jp 7 2025-07-08 2026-07-24 nxdomain
tiscitsm.staff.tkc.co.jp 7 2025-07-08 2026-07-24 nxdomain
sfaap.staff.tkc.co.jp 7 2025-07-08 2026-07-24 nxdomain
supap.staff.tkc.co.jp 7 2025-07-08 2026-07-24 nxdomain
tkcseminar.staff.tkc.co.jp 7 2025-07-08 2026-07-24 nxdomain
tkcmonitor.staff.tkc.co.jp 7 2025-07-08 2026-07-24 nxdomain
bisfs.staff.tkc.co.jp 7 2025-07-08 2026-07-24 nxdomain
sgs.staff.tkc.co.jp 3 2026-05-08 2026-07-24 nxdomain
bis.staff.tkc.co.jp 7 2025-07-08 2026-07-24 nxdomain
nis.staff.tkc.co.jp 7 2025-07-08 2026-07-24 nxdomain
sis.staff.tkc.co.jp 2 2026-06-12 2026-07-24 nxdomain
tisc-sms.staff.tkc.co.jp 7 2025-07-08 2026-07-24 nxdomain
epos.staff.tkc.co.jp 7 2025-07-08 2026-07-24 nxdomain
profit.staff.tkc.co.jp 7 2025-07-08 2026-07-24 nxdomain
tkc-docmgmt.staff.tkc.co.jp 7 2025-07-08 2026-07-24 nxdomain
tcstg-gw.staff.tkc.co.jp 7 2025-07-08 2026-07-24 nxdomain
aida1gw.staff.tkc.co.jp 7 2025-07-08 2026-07-24 nxdomain
company.staff.tkc.co.jp 7 2025-07-08 2026-07-24 nxdomain
aas-staging.tkc.co.jp 4 2025-09-29 2026-08-30 ok
*.aas-staging.tkc.co.jp 4 2025-06-23 2026-08-30 —
ymsstg.tkc.co.jp 3 2025-10-20 2026-09-20 ok
enterprise-ymsstg.tkc.co.jp 3 2025-10-28 2026-09-28 ok
ctsstg.tkc.co.jp 2 2025-09-28 2026-08-28 ok
ctsinternal.tkc.co.jp 2 2025-09-28 2026-08-28 ok
cybermail.tkc.co.jp 2 2026-03-16 2026-09-24 nodata
*.cybermail.tkc.co.jp 2 2026-03-16 2026-09-24 —
peppol.tkc.co.jp 4 2025-08-02 2026-07-04 nodata
acc-peppol.tkc.co.jp 4 2025-11-03 2026-10-06 nodata
*.acc-peppol.tkc.co.jp 10 2025-11-03 2026-10-06 —
*.ap.acc-peppol.tkc.co.jp 1 2025-11-09 2025-11-09 —
*.smp.acc-peppol.tkc.co.jp 3 2025-11-09 2026-06-19 —
dev-peppol.tkc.co.jp 3 2026-04-23 2026-09-23 nodata
*.dev-peppol.tkc.co.jp 4 2025-12-09 2026-09-23 —
kyc-ec2.dev-peppol.tkc.co.jp 1 2025-08-15 2025-08-15 nxdomain
kyc-api.dev-peppol.tkc.co.jp 1 2025-08-14 2025-08-14 ok
*.smp.dev-peppol.tkc.co.jp 1 2025-12-09 2025-12-09 —
kyc-app.dev-peppol.tkc.co.jp 2 2025-08-14 2025-08-15 ok
*.peppol.tkc.co.jp 8 2025-06-13 2026-07-04 —
*.smp.peppol.tkc.co.jp 4 2025-06-13 2026-07-04 —
contact-escalation.tkc.co.jp 1 2025-11-18 2025-11-18 ok
bcp.tkc.co.jp 2 2026-02-24 2026-07-27 nodata
*.bcp.tkc.co.jp 2 2026-02-24 2026-07-27 —
aas.tkc.co.jp 3 2025-12-30 2026-09-10 ok
*.aas.tkc.co.jp 3 2025-07-09 2026-06-09 —
oms.tkc.co.jp 1 2026-09-29 2026-09-29 nodata
*.oms.tkc.co.jp 1 2026-09-29 2026-09-29 —

Showing the first 100 hostnames — sign in with GitHub or Google to page the full list, or use the API with an API key: GET /v1/hosts/tkc.co.jp.

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/tkc.co.jp.