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.

31 hosts · 336 ms

HostCertsFirst seenLast seenDNS
reddiamond.com 13 2026-04-26 2026-10-04 ok
svc.reddiamond.com 6 2025-09-19 2026-09-24 ok
www.svc.reddiamond.com 6 2025-09-19 2026-09-24 nxdomain
ecomsvc.reddiamond.com 2 2026-05-08 2026-06-26 ok
cloud.reddiamond.com 2 2026-06-03 2026-06-16 ok
www.cloud.reddiamond.com 2 2026-06-03 2026-06-16 nxdomain
service.reddiamond.com 8 2025-07-13 2026-07-20 ok
www.service.reddiamond.com 8 2025-07-13 2026-07-20 nxdomain
testshopservice.reddiamond.com 2 2026-05-08 2026-06-26 ok
collab-edge.reddiamond.com 5 2026-04-06 2026-06-09 nxdomain
rdexwye.reddiamond.com 5 2026-04-06 2026-06-09 ok
www.rdexwye.reddiamond.com 5 2026-04-06 2026-06-09 nxdomain
coffeeplanning.reddiamond.com 2 2026-05-08 2026-06-26 nxdomain
www.coffeeplanning.reddiamond.com 2 2026-05-08 2026-06-26 nxdomain
plantpurchasing.reddiamond.com 2 2026-05-08 2026-06-26 ok
rdvpn.reddiamond.com 5 2025-09-10 2026-09-24 ok
www.rdvpn.reddiamond.com 5 2025-09-10 2026-09-24 nxdomain
webshop.reddiamond.com 2 2025-12-17 2026-01-22 ok
www.webshop.reddiamond.com 2 2025-12-17 2026-01-22 nxdomain
dairies.reddiamond.com 2 2025-10-14 2025-10-14 ok
www.dairies.reddiamond.com 2 2025-10-14 2025-10-14 nxdomain
warehousetransfers.reddiamond.com 4 2026-03-25 2026-09-09 nxdomain
www.warehousetransfers.reddiamond.com 4 2026-03-25 2026-09-09 nxdomain
hrcomments.reddiamond.com 6 2025-08-03 2026-08-17 ok
www.hrcomments.reddiamond.com 6 2025-08-03 2026-08-17 nxdomain
servicecontract.reddiamond.com 1 2026-02-25 2026-02-25 ok
www.servicecontract.reddiamond.com 1 2026-02-25 2026-02-25 nxdomain
shopint.reddiamond.com 2 2026-01-11 2026-02-25 ok
www.shopint.reddiamond.com 2 2026-01-11 2026-02-25 nxdomain
www.reddiamond.com 13 2026-04-26 2026-10-04 ok
orderentry.reddiamond.com 2 2026-05-08 2026-06-26 ok

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