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.

25 hosts · 309 ms

HostCertsFirst seenLast seenDNS
algeco.com 3 2025-09-09 2026-09-07 ok
*.algeco.com 3 2025-09-09 2026-09-07 —
itsangeminisbc1.algeco.com 2 2026-01-08 2026-07-10 ok
itsangeminisbc2.algeco.com 2 2026-01-08 2026-07-10 ok
b2b.algeco.com 2 2026-08-20 2026-08-20 ok
itsangeminisbc.algeco.com 1 2026-07-10 2026-07-10 ok
gcc.algeco.com 2 2025-08-07 2026-07-03 ok
algeco-intelligence.algeco.com 1 2026-07-10 2026-07-10 ok
algeni.algeco.com 2 2026-02-19 2026-07-09 ok
api.algeco.com 1 2026-01-26 2026-01-26 ok
nonprod-api.algeco.com 1 2026-01-26 2026-01-26 ok
tender-management-tool.algeco.com 1 2026-07-28 2026-07-28 ok
spm.algeco.com 1 2026-10-02 2026-10-02 ok
modulearn.algeco.com 10 2026-05-01 2026-08-27 ok
myalgeco.algeco.com 1 2026-01-26 2026-01-26 ok
info.algeco.com 8 2026-04-25 2026-08-26 ok
mip.algeco.com 1 2026-07-03 2026-07-03 ok
clp.algeco.com 1 2026-07-28 2026-07-28 ok
postcodelookup.algeco.com 1 2026-07-21 2026-07-21 ok
spaceplanner.algeco.com 4 2026-04-20 2026-09-21 ok
mip-scorer.algeco.com 1 2026-07-03 2026-07-03 nxdomain
customer-referrals.algeco.com 1 2026-06-05 2026-06-05 ok
algeni-uat.algeco.com 2 2026-02-12 2026-07-06 ok
checkpoint.algeco.com 1 2025-12-31 2025-12-31 ok
algeni-dev.algeco.com 2 2026-02-15 2026-07-08 ok

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