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.

23 hosts · 500 ms

HostCertsFirst seenLast seenDNS
softwaretoolbox.com 8 2025-08-18 2026-09-10 ok
*.softwaretoolbox.com 2 2025-08-18 2026-09-10 —
*.swtboffice.softwaretoolbox.com 2 2025-08-18 2026-09-10 —
share.softwaretoolbox.com 2 2026-01-29 2026-06-14 ok
blog.softwaretoolbox.com 12 2026-04-18 2026-08-14 ok
activation-auth.softwaretoolbox.com 5 2026-05-23 2026-09-20 ok
activation-api.softwaretoolbox.com 5 2026-05-23 2026-09-20 ok
click.mail.softwaretoolbox.com 1 2026-06-17 2026-06-17 ok
main.softwaretoolbox.com 8 2026-04-15 2026-08-12 ok
activation.softwaretoolbox.com 5 2026-05-24 2026-09-26 ok
jonjon.softwaretoolbox.com 1 2026-09-14 2026-09-14 ok
info.softwaretoolbox.com 10 2026-04-19 2026-08-15 ok
help.softwaretoolbox.com 10 2026-04-18 2026-08-15 ok
shop.softwaretoolbox.com 3 2026-06-08 2026-08-17 ok
rp.softwaretoolbox.com 5 2026-04-24 2026-09-03 ok
ftp.softwaretoolbox.com 2 2026-01-27 2026-06-13 ok
downloads.softwaretoolbox.com 2 2026-01-29 2026-06-14 ok
quotes.softwaretoolbox.com 3 2026-07-09 2026-09-12 ok
products.softwaretoolbox.com 11 2026-05-31 2026-09-27 ok
workflows.softwaretoolbox.com 2 2026-06-05 2026-06-05 nodata
support.softwaretoolbox.com 17 2026-05-08 2026-09-03 ok
www.softwaretoolbox.com 12 2026-05-01 2026-08-27 ok
sandbox.softwaretoolbox.com 5 2026-05-22 2026-10-01 ok

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