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.

52 hosts · 356 ms

HostCertsFirst seenLast seenDNS
summ.com 167 2026-04-14 2026-09-28 ok
*.summ.com 108 2026-04-14 2026-09-27 —
am2.summ.com 12 2026-04-29 2026-08-27 ok
an5.summ.com 16 2026-04-29 2026-08-27 ok
binance.summ.com 8 2026-04-29 2026-08-25 nxdomain
*.binance.summ.com 8 2026-04-29 2026-08-25 —
home.summ.com 6 2026-04-29 2026-08-25 nxdomain
dev.home.summ.com 6 2026-04-29 2026-08-25 nxdomain
coinbase.summ.com 6 2026-04-29 2026-08-25 nxdomain
*.coinbase.summ.com 6 2026-04-29 2026-08-25 —
coinstash.summ.com 6 2026-04-29 2026-08-25 nxdomain
dev.coinstash.summ.com 6 2026-04-29 2026-08-25 nxdomain
api.summ.com 1 2025-11-03 2025-11-03 ok
spt-prod-api.summ.com 1 2025-11-03 2025-11-03 ok
staging-api.summ.com 1 2025-11-03 2025-11-03 ok
dev-api.summ.com 1 2025-11-03 2025-11-03 ok
preview-api.summ.com 1 2025-11-03 2025-11-03 ok
*.pr-storybook.summ.com 8 2026-04-29 2026-08-25 —
metamask.summ.com 6 2026-04-29 2026-08-25 nxdomain
*.metamask.summ.com 6 2026-04-29 2026-08-25 —
*.tunnel.summ.com 8 2026-04-29 2026-08-25 —
am.summ.com 6 2026-04-29 2026-08-25 nxdomain
kraken.summ.com 8 2026-04-29 2026-08-25 nxdomain
*.kraken.summ.com 8 2026-04-29 2026-08-25 —
go.summ.com 3 2026-04-23 2026-09-12 ok
sdk-demo.summ.com 6 2026-04-29 2026-08-25 nxdomain
*.sdk-demo.summ.com 6 2026-04-29 2026-08-25 —
mcp.summ.com 2 2026-04-24 2026-09-24 ok
spt-prod-mcp.summ.com 3 2026-04-17 2026-09-17 ok
staging-mcp.summ.com 2 2026-04-17 2026-09-17 ok
dev-mcp.summ.com 2 2026-04-08 2026-09-08 ok
preview-mcp.summ.com 2 2026-04-17 2026-09-17 ok
app.summ.com 2 2025-11-03 2026-10-04 ok
*.app.summ.com 6 2026-04-25 2026-08-21 —
spt-prod.app.summ.com 3 2025-11-03 2026-10-04 ok
staging.app.summ.com 2 2025-11-03 2026-10-04 ok
dev.app.summ.com 2 2025-11-03 2026-10-04 ok
preview.app.summ.com 2 2025-10-30 2026-09-30 ok
provider.summ.com 6 2026-04-29 2026-08-25 nxdomain
*.provider.summ.com 6 2026-04-29 2026-08-25 —
ir.summ.com 6 2026-04-29 2026-08-25 nxdomain
*.ir.summ.com 6 2026-04-29 2026-08-25 —
apidocs.summ.com 12 2026-05-23 2026-09-18 ok
mta-sts.summ.com 2 2026-09-28 2026-09-28 ok
*.mta-sts.summ.com 2 2026-09-28 2026-09-28 —
status.summ.com 5 2026-05-15 2026-09-12 ok
consent.summ.com 8 2026-06-02 2026-09-28 nxdomain
dev.summ.com 10 2026-05-01 2026-08-28 ok
sdk-demo.dev.summ.com 6 2026-04-29 2026-08-25 nxdomain
*.pr-preview.summ.com 8 2025-11-03 2026-10-04 —
*.preview.summ.com 8 2026-04-29 2026-08-25 —
www.summ.com 10 2026-05-01 2026-08-27 ok

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