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.

63 hosts · 366 ms

HostCertsFirst seenLast seenDNS
megaport.com 4 2026-04-08 2026-08-11 ok
*.megaport.com 7 2026-01-08 2026-06-25 —
1000.megaport.com 5 2026-05-18 2026-09-15 ok
*.1000.megaport.com 5 2026-05-18 2026-09-15 —
swag.megaport.com 11 2026-04-24 2026-08-21 ok
jira-staging.megaport.com 1 2025-12-05 2025-12-05 nxdomain
confluence-staging.megaport.com 1 2025-12-05 2025-12-05 nxdomain
dev-staging.megaport.com 5 2026-05-28 2026-09-27 ok
jira-testing.megaport.com 1 2025-12-05 2025-12-05 nxdomain
confluence-testing.megaport.com 1 2025-12-05 2025-12-05 nxdomain
mocksaml-v2.ci.megaport.com 1 2026-05-27 2026-05-27 ok
mocksaml.ci.megaport.com 2 2025-07-25 2026-06-25 ok
ext-api.megaport.com 1 2026-07-31 2026-07-31 nxdomain
*.ext-api.megaport.com 1 2026-07-31 2026-07-31 —
ui.megaport.com 4 2026-04-16 2026-08-14 ok
headscale-syd-01.j.megaport.com 2 2025-09-19 2026-08-20 ok
headscale-syd-01-v2.j.megaport.com 2 2026-08-20 2026-08-20 ok
headscale-mgmt-california-v2.j.megaport.com 2 2026-08-19 2026-08-19 ok
headscale-secops-v2.j.megaport.com 4 2026-08-13 2026-08-17 nxdomain
headscale-ix-route-servers-v2.j.megaport.com 2 2026-08-20 2026-08-20 ok
headscale-mgmt-california.j.megaport.com 2 2025-09-18 2026-08-19 ok
tenable-syd.j.megaport.com 2 2026-07-15 2026-07-15 ok
headscale-secops.j.megaport.com 1 2025-10-20 2025-10-20 ok
headscale-ix-route-servers.j.megaport.com 1 2026-05-19 2026-05-19 ok
sourcebot.j.megaport.com 2 2025-10-17 2026-09-17 ok
k.megaport.com 3 2025-09-10 2026-08-11 nodata
*.k.megaport.com 3 2025-09-10 2026-08-11 —
authpool.megaport.com 2 2025-06-10 2026-05-09 ok
em.megaport.com 18 2026-05-08 2026-09-03 ok
netcool-dash-1.o.megaport.com 1 2026-09-01 2026-09-01 ok
netcool-col-obj-b01.o.megaport.com 1 2026-09-01 2026-09-01 ok
netcool-col-obj-p01.o.megaport.com 1 2026-09-01 2026-09-01 ok
netcool-dash-2.o.megaport.com 1 2026-09-01 2026-09-01 ok
netcool-agg-obj-b.o.megaport.com 1 2026-09-01 2026-09-01 ok
apps.netcool.o.megaport.com 1 2026-02-07 2026-02-07 nxdomain
*.apps.netcool.o.megaport.com 1 2026-02-07 2026-02-07 —
*.noi.apps.netcool.o.megaport.com 1 2026-02-07 2026-02-07 —
netcool-agg-obj-p.o.megaport.com 1 2026-09-01 2026-09-01 ok
go.megaport.com 16 2026-05-13 2026-09-08 ok
postgresghactions-temp.megaport.com 6 2026-04-15 2026-08-31 ok
docs.megaport.com 7 2026-08-04 2026-10-02 ok
tutorials.megaport.com 2 2026-05-27 2026-05-27 ok
surveys.megaport.com 11 2026-05-23 2026-09-19 ok
connect.megaport.com 8 2026-05-03 2026-08-29 ok
headscale-clickstack-v2.sandpit.megaport.com 1 2026-09-07 2026-09-07 nxdomain
tutorials-testing.sandpit.megaport.com 3 2026-05-21 2026-05-22 nxdomain
*.tutorials-testing.sandpit.megaport.com 1 2026-05-22 2026-05-22 —
headscale-clickstack.sandpit.megaport.com 1 2026-04-14 2026-04-14 ok
netcool-dash-1.subdomain.sandpit.megaport.com 1 2026-09-01 2026-09-01 nxdomain
netcool-col-obj-p01.subdomain.sandpit.megaport.com 1 2026-09-01 2026-09-01 nxdomain
netcool-agg-obj-p.subdomain.sandpit.megaport.com 1 2026-09-01 2026-09-01 nxdomain
postgresghactions-temp.sandpit.megaport.com 2 2026-07-02 2026-07-02 nxdomain
tutorials.sandpit.megaport.com 5 2026-05-26 2026-05-26 ok
content.megaport.com 2 2026-04-11 2026-09-11 ok
event.megaport.com 4 2025-07-11 2026-06-11 ok
authtest.megaport.com 2 2025-06-10 2026-05-09 nodata
trust.megaport.com 8 2026-05-24 2026-09-19 ok
dev.megaport.com 4 2026-04-13 2026-08-11 ok
www.megaport.com 4 2026-04-08 2026-08-11 ok
netlify.megaport.com 4 2026-04-14 2026-08-12 ok
*.netlify.megaport.com 4 2026-04-14 2026-08-12 —
tf-registry.megaport.com 1 2026-05-27 2026-05-27 ok
hye9pwdy76er4haa1kioyukrbw79xcl.tf-registry.megaport.com 1 2026-05-27 2026-05-27 nxdomain

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