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.

100 hosts (first page) · 531 ms

HostCertsFirst seenLast seenDNS
facebook.com 560 2026-04-10 2026-10-07 ok
*.facebook.com 560 2026-04-10 2026-10-07 —
v6.facebook.com 342 2026-04-10 2026-10-07 nodata
*.v6.facebook.com 342 2026-04-10 2026-10-07 —
alpha.facebook.com 297 2026-04-10 2026-10-07 ok
*.alpha.facebook.com 297 2026-04-10 2026-10-07 —
fb.alpha.facebook.com 297 2026-04-10 2026-10-07 ok
*.fb.alpha.facebook.com 297 2026-04-10 2026-10-07 —
secure.alpha.facebook.com 306 2026-04-10 2026-10-07 ok
*.secure.alpha.facebook.com 306 2026-04-10 2026-10-07 —
m.alpha.facebook.com 297 2026-04-10 2026-10-07 ok
*.m.alpha.facebook.com 297 2026-04-10 2026-10-07 —
fb.m.alpha.facebook.com 297 2026-04-10 2026-10-07 ok
*.fb.m.alpha.facebook.com 297 2026-04-10 2026-10-07 —
beta.facebook.com 290 2026-04-10 2026-10-07 ok
*.beta.facebook.com 290 2026-04-10 2026-10-07 —
fb.beta.facebook.com 290 2026-04-10 2026-10-07 ok
*.fb.beta.facebook.com 290 2026-04-10 2026-10-07 —
secure.beta.facebook.com 308 2026-04-10 2026-10-07 ok
*.secure.beta.facebook.com 308 2026-04-10 2026-10-07 —
m.beta.facebook.com 290 2026-04-10 2026-10-07 ok
*.m.beta.facebook.com 290 2026-04-10 2026-10-07 —
*.fb.m.beta.facebook.com 290 2026-04-10 2026-10-07 —
internmc.facebook.com 284 2026-04-10 2026-10-07 ok
*.internmc.facebook.com 284 2026-04-10 2026-10-07 —
secure.internmc.facebook.com 284 2026-04-10 2026-10-07 ok
*.secure.internmc.facebook.com 284 2026-04-10 2026-10-07 —
m.internmc.facebook.com 284 2026-04-10 2026-10-07 ok
*.m.internmc.facebook.com 284 2026-04-10 2026-10-07 —
prod.facebook.com 287 2026-04-10 2026-10-07 ok
*.prod.facebook.com 287 2026-04-10 2026-10-07 —
secure.prod.facebook.com 287 2026-04-10 2026-10-07 ok
*.secure.prod.facebook.com 287 2026-04-10 2026-10-07 —
trunkstable.facebook.com 287 2026-04-10 2026-10-07 ok
*.trunkstable.facebook.com 287 2026-04-10 2026-10-07 —
secure.trunkstable.facebook.com 304 2026-04-10 2026-10-07 ok
*.secure.trunkstable.facebook.com 304 2026-04-10 2026-10-07 —
secure.facebook.com 288 2026-04-10 2026-10-07 ok
*.secure.facebook.com 288 2026-04-10 2026-10-07 —
shortwave.facebook.com 288 2026-04-10 2026-10-07 ok
*.shortwave.facebook.com 288 2026-04-10 2026-10-07 —
h.facebook.com 257 2026-04-10 2026-10-07 ok
scgraph.facebook.com 335 2026-04-10 2026-10-07 ok
*.scgraph.facebook.com 335 2026-04-10 2026-10-07 —
prod.scgraph.facebook.com 336 2026-04-10 2026-10-07 ok
*.prod.scgraph.facebook.com 336 2026-04-10 2026-10-07 —
interngraph.prod.scgraph.facebook.com 336 2026-04-10 2026-10-07 ok
staging.scgraph.facebook.com 336 2026-04-10 2026-10-07 ok
*.staging.scgraph.facebook.com 336 2026-04-10 2026-10-07 —
interngraph.staging.scgraph.facebook.com 336 2026-04-10 2026-10-07 ok
interngraph.scgraph.facebook.com 335 2026-04-10 2026-10-07 ok
*.m.facebook.com 560 2026-04-10 2026-10-07 —
intern.facebook.com 291 2026-04-10 2026-10-07 ok
*.intern.facebook.com 291 2026-04-10 2026-10-07 —
alpha.intern.facebook.com 332 2026-04-10 2026-10-07 ok
*.alpha.intern.facebook.com 332 2026-04-10 2026-10-07 —
secure.intern.facebook.com 287 2026-04-10 2026-10-07 ok
*.secure.intern.facebook.com 287 2026-04-10 2026-10-07 —
m.intern.facebook.com 291 2026-04-10 2026-10-07 ok
*.m.intern.facebook.com 291 2026-04-10 2026-10-07 —
extern.facebook.com 298 2026-04-10 2026-10-07 ok
*.extern.facebook.com 298 2026-04-10 2026-10-07 —
p.facebook.com 285 2026-04-10 2026-10-07 ok
*.p.facebook.com 285 2026-04-10 2026-10-07 —
dewey-lfs.vip.facebook.com 333 2026-04-10 2026-10-07 nxdomain
www.dewey-lfs.vip.facebook.com 333 2026-04-10 2026-10-07 nxdomain
symsrv.vip.facebook.com 337 2026-04-10 2026-10-07 nxdomain
www.symsrv.vip.facebook.com 337 2026-04-10 2026-10-07 nxdomain
dewey.vip.facebook.com 340 2026-04-10 2026-10-07 nxdomain
www.dewey.vip.facebook.com 340 2026-04-10 2026-10-07 nxdomain
llama-ztp.corp.facebook.com 334 2026-04-10 2026-10-07 nxdomain
up.facebook.com 341 2026-04-10 2026-10-07 nodata
*.up.facebook.com 341 2026-04-10 2026-10-07 —
internmcr.facebook.com 284 2026-04-10 2026-10-07 nxdomain
*.internmcr.facebook.com 284 2026-04-10 2026-10-07 —
secure.internmcr.facebook.com 284 2026-04-10 2026-10-07 nxdomain
*.secure.internmcr.facebook.com 284 2026-04-10 2026-10-07 —
*.intermcr.facebook.com 284 2026-04-10 2026-10-07 —
hr.facebook.com 338 2026-04-10 2026-10-07 ok
*.hr.facebook.com 338 2026-04-10 2026-10-07 —
cstools.facebook.com 288 2026-04-10 2026-10-07 ok
*.cstools.facebook.com 288 2026-04-10 2026-10-07 —
payments.facebook.com 284 2026-04-10 2026-10-07 ok
*.payments.facebook.com 284 2026-04-10 2026-10-07 —
rampart.facebook.com 336 2026-04-10 2026-10-07 nodata
*.rampart.facebook.com 336 2026-04-10 2026-10-07 —
*.svcscm.rampart010.rampart.facebook.com 336 2026-04-10 2026-10-07 —
*.svcscm.rampart020.rampart.facebook.com 336 2026-04-10 2026-10-07 —
*.svcscm.rampart030.rampart.facebook.com 336 2026-04-10 2026-10-07 —
*.svcscm.rampart040.rampart.facebook.com 336 2026-04-10 2026-10-07 —
*.svcscm.rampart001.rampart.facebook.com 336 2026-04-10 2026-10-07 —
*.svcscm.rampart011.rampart.facebook.com 336 2026-04-10 2026-10-07 —
*.svcscm.rampart021.rampart.facebook.com 336 2026-04-10 2026-10-07 —
*.svcscm.rampart031.rampart.facebook.com 336 2026-04-10 2026-10-07 —
*.svcscm.rampart041.rampart.facebook.com 336 2026-04-10 2026-10-07 —
*.svcscm.rampart002.rampart.facebook.com 336 2026-04-10 2026-10-07 —
*.svcscm.rampart012.rampart.facebook.com 336 2026-04-10 2026-10-07 —
*.svcscm.rampart022.rampart.facebook.com 336 2026-04-10 2026-10-07 —
*.svcscm.rampart032.rampart.facebook.com 336 2026-04-10 2026-10-07 —
*.svcscm.rampart042.rampart.facebook.com 336 2026-04-10 2026-10-07 —

Showing the first 100 hostnames — sign in with GitHub or Google to page the full list, or use the API with an API key: GET /v1/hosts/facebook.com.

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/facebook.com.