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) · 532 ms

HostCertsFirst seenLast seenDNS
phx-pt.com 12 2026-05-13 2026-09-09 ok
*.phx-pt.com 12 2026-05-13 2026-09-09 —
*.firewall.phx-pt.com 5 2026-05-30 2026-09-27 —
bethesda.sophos.phx-pt.com 2 2026-04-14 2026-10-07 ok
alexandria.sophos.phx-pt.com 2 2026-05-13 2026-05-13 ok
wetumpka.sophos.phx-pt.com 2 2026-05-16 2026-05-16 ok
columbiana.sophos.phx-pt.com 2 2026-10-01 2026-10-01 ok
indiana.sophos.phx-pt.com 1 2026-04-19 2026-04-19 ok
pasadena.sophos.phx-pt.com 2 2026-05-24 2026-05-24 ok
altoona.sophos.phx-pt.com 2 2026-05-25 2026-05-25 ok
tamaqua.sophos.phx-pt.com 4 2026-04-17 2026-09-15 ok
csc.sophos.phx-pt.com 2 2026-05-22 2026-05-22 ok
yorksc.sophos.phx-pt.com 2 2026-05-22 2026-05-22 ok
merrifield.sophos.phx-pt.com 2 2026-05-13 2026-05-13 ok
mansfield.sophos.phx-pt.com 1 2026-04-19 2026-04-19 ok
eastonmd.sophos.phx-pt.com 3 2026-06-02 2026-10-07 ok
goochland.sophos.phx-pt.com 2 2026-05-13 2026-05-13 ok
poland.sophos.phx-pt.com 2 2026-05-25 2026-05-25 ok
westend.sophos.phx-pt.com 1 2026-10-06 2026-10-06 ok
richmond.sophos.phx-pt.com 2 2026-05-13 2026-05-13 ok
fleetwood.sophos.phx-pt.com 2 2026-05-11 2026-05-11 ok
pikerd.sophos.phx-pt.com 5 2026-05-21 2026-09-21 ok
bradford.sophos.phx-pt.com 1 2026-04-19 2026-04-19 ok
royersford.sophos.phx-pt.com 1 2026-04-19 2026-04-19 ok
latrobe.sophos.phx-pt.com 2 2026-05-25 2026-05-25 ok
portage.sophos.phx-pt.com 1 2026-04-17 2026-04-17 ok
statecollege.sophos.phx-pt.com 1 2026-04-17 2026-04-17 ok
chesapeake.sophos.phx-pt.com 2 2026-05-15 2026-05-15 ok
brookville.sophos.phx-pt.com 1 2026-04-19 2026-04-19 ok
danville.sophos.phx-pt.com 2 2026-05-25 2026-05-25 ok
greenville.sophos.phx-pt.com 2 2026-05-24 2026-05-24 ok
hughesville.sophos.phx-pt.com 1 2026-04-17 2026-04-17 ok
mooresville.sophos.phx-pt.com 2 2026-05-22 2026-05-22 ok
watkinsville.sophos.phx-pt.com 2 2026-05-22 2026-05-22 ok
sellersville.sophos.phx-pt.com 1 2026-04-17 2026-04-17 ok
douglassville.sophos.phx-pt.com 1 2026-04-19 2026-04-19 ok
gilbertsville.sophos.phx-pt.com 3 2026-04-17 2026-05-01 ok
pottsville.sophos.phx-pt.com 4 2026-04-17 2026-09-15 ok
harleysville.sophos.phx-pt.com 3 2026-05-25 2026-08-27 ok
prattville.sophos.phx-pt.com 2 2026-05-15 2026-05-15 ok
selbyville.sophos.phx-pt.com 2 2026-05-22 2026-05-22 ok
carlisle.sophos.phx-pt.com 2 2026-05-09 2026-05-09 ok
jerseyshore.sophos.phx-pt.com 2 2026-05-25 2026-05-25 ok
baltimore.sophos.phx-pt.com 2 2026-05-07 2026-05-07 ok
bellefonte.sophos.phx-pt.com 1 2026-04-17 2026-04-17 ok
charlotte.sophos.phx-pt.com 2 2026-05-22 2026-05-22 ok
pinegrove.sophos.phx-pt.com 2 2026-05-19 2026-05-19 ok
selinsgrove.sophos.phx-pt.com 2 2026-05-11 2026-05-11 ok
reading.sophos.phx-pt.com 2 2026-05-11 2026-05-11 ok
kittanning.sophos.phx-pt.com 1 2026-04-19 2026-04-19 ok
sinkingspring.sophos.phx-pt.com 1 2026-04-19 2026-04-19 ok
hamburg.sophos.phx-pt.com 1 2026-04-17 2026-04-17 ok
mechanicsburg.sophos.phx-pt.com 1 2026-04-19 2026-04-19 ok
harrisburg.sophos.phx-pt.com 4 2026-04-19 2026-10-01 ok
lewisburg.sophos.phx-pt.com 2 2026-05-25 2026-05-25 ok
bloomsburg.sophos.phx-pt.com 1 2026-04-17 2026-04-17 ok
chambersburg.sophos.phx-pt.com 1 2026-04-19 2026-04-19 ok
cornersburg.sophos.phx-pt.com 4 2026-04-28 2026-08-28 ok
elysburg.sophos.phx-pt.com 1 2026-04-17 2026-04-17 ok
azurexg.sophos.phx-pt.com 4 2026-04-17 2026-08-17 ok
whitemarsh.sophos.phx-pt.com 2 2026-05-24 2026-05-24 ok
limerick.sophos.phx-pt.com 3 2026-07-30 2026-09-29 ok
fenwick.sophos.phx-pt.com 2 2026-05-22 2026-05-22 ok
norfolk.sophos.phx-pt.com 2 2026-05-13 2026-05-13 ok
millbrook.sophos.phx-pt.com 2 2026-08-11 2026-08-27 ok
newark.sophos.phx-pt.com 2 2026-05-22 2026-05-22 ok
carmichael.sophos.phx-pt.com 2 2026-05-15 2026-05-15 ok
laurel.sophos.phx-pt.com 2 2026-05-22 2026-05-22 ok
millhall.sophos.phx-pt.com 2 2026-05-25 2026-05-25 ok
fortmill.sophos.phx-pt.com 2 2026-05-22 2026-05-22 ok
horsham.sophos.phx-pt.com 1 2026-04-19 2026-04-19 ok
salem.sophos.phx-pt.com 2 2026-05-25 2026-05-25 ok
shamokin.sophos.phx-pt.com 1 2026-04-18 2026-04-18 ok
herndon.sophos.phx-pt.com 2 2026-05-13 2026-05-13 nxdomain
elverson.sophos.phx-pt.com 1 2026-04-19 2026-04-19 ok
cresson.sophos.phx-pt.com 1 2026-04-17 2026-04-17 ok
wilmington.sophos.phx-pt.com 2 2026-05-22 2026-05-22 ok
lehighton.sophos.phx-pt.com 1 2026-04-17 2026-04-17 ok
easton.sophos.phx-pt.com 3 2026-04-17 2026-07-06 ok
kingston.sophos.phx-pt.com 4 2026-04-17 2026-09-19 ok
mifflintown.sophos.phx-pt.com 2 2026-05-23 2026-05-23 ok
austintown.sophos.phx-pt.com 5 2026-05-25 2026-09-30 ok
watsontown.sophos.phx-pt.com 1 2026-04-17 2026-04-17 ok
lewistown.sophos.phx-pt.com 1 2026-04-17 2026-04-17 ok
myerstown.sophos.phx-pt.com 2 2026-04-22 2026-04-22 ok
pottstown.sophos.phx-pt.com 1 2026-04-19 2026-04-19 ok
tenleytown.sophos.phx-pt.com 2 2026-05-24 2026-05-24 ok
irmo.sophos.phx-pt.com 2 2026-05-22 2026-05-22 ok
dagsboro.sophos.phx-pt.com 1 2026-08-14 2026-08-14 ok
millsboro.sophos.phx-pt.com 2 2026-05-20 2026-05-20 ok
richlandtwp.sophos.phx-pt.com 1 2026-04-17 2026-04-17 ok
hazletwp.sophos.phx-pt.com 2 2026-05-25 2026-05-25 ok
alabaster.sophos.phx-pt.com 2 2026-05-13 2026-05-13 ok
lancaster.sophos.phx-pt.com 2 2026-05-07 2026-05-07 ok
westchester.sophos.phx-pt.com 1 2026-04-17 2026-04-17 ok
dover.sophos.phx-pt.com 2 2026-05-22 2026-05-22 ok
hanover.sophos.phx-pt.com 2 2026-05-16 2026-05-16 ok
oceanpines.sophos.phx-pt.com 2 2026-05-24 2026-05-24 ok
lewes.sophos.phx-pt.com 2 2026-05-23 2026-05-23 ok
annapolis.sophos.phx-pt.com 2 2026-05-24 2026-05-24 ok

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/phx-pt.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/phx-pt.com.