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) · 471 ms

HostCertsFirst seenLast seenDNS
t-mobile.com 7 2026-02-09 2026-08-03 ok
*.t-mobile.com 3 2025-11-07 2026-06-01 —
lab101010.t-mobile.com 3 2026-04-24 2026-09-24 ok
googtmprdp910.t-mobile.com 2 2025-12-09 2026-04-08 ok
googtmprdt910.t-mobile.com 2 2025-12-09 2026-04-20 ok
msottn10.t-mobile.com 1 2025-09-08 2025-09-08 nxdomain
my-test-cs20.t-mobile.com 2 2026-08-15 2026-08-15 nxdomain
my-test-cs30.t-mobile.com 4 2026-08-16 2026-08-16 nxdomain
imapol40.t-mobile.com 1 2026-07-22 2026-07-22 nxdomain
ppdsupcu0sfw0.t-mobile.com 2 2025-09-22 2025-09-22 ok
prdsupcu0sfw0.t-mobile.com 1 2025-09-24 2025-09-24 ok
stgsupcu0sfw0.t-mobile.com 1 2025-08-19 2025-08-19 ok
devsupcu0sfw0.t-mobile.com 1 2025-08-14 2025-08-14 ok
prdsupeu2sfw0.t-mobile.com 1 2025-09-24 2025-09-24 ok
stgsupeu2sfw0.t-mobile.com 1 2025-08-19 2025-08-19 ok
metromw-dataaccess-t2-dev001.t-mobile.com 1 2025-07-30 2025-07-30 nxdomain
metromw-dataaccess-pl-dev001.t-mobile.com 1 2025-07-30 2025-07-30 nxdomain
metromw-dataaccess-dev001.t-mobile.com 1 2025-07-16 2025-07-16 nxdomain
metromw-dataaccess-t-dev001.t-mobile.com 1 2025-07-30 2025-07-30 nxdomain
wrgweb.cnf.stg401.t-mobile.com 2 2025-10-03 2026-09-03 ok
wrgweb.cnf.phi401.t-mobile.com 3 2025-09-16 2026-09-03 ok
wrgweb.cnf.aro401.t-mobile.com 3 2025-09-16 2026-09-03 ok
wrgweb.cnf.plr401.t-mobile.com 3 2025-09-16 2026-09-03 ok
digital-plab01.t-mobile.com 17 2025-10-07 2026-08-19 nodata
alpha.digital-plab01.t-mobile.com 18 2026-02-09 2026-08-19 nxdomain
internal.digital-plab01.t-mobile.com 17 2025-10-07 2026-08-19 nxdomain
es.digital-plab01.t-mobile.com 9 2026-01-26 2026-09-15 ok
gov.digital-plab01.t-mobile.com 17 2025-10-07 2026-08-19 nxdomain
securepay-plab01.t-mobile.com 1 2026-07-22 2026-07-22 ok
digital-qlab01.t-mobile.com 19 2026-02-09 2026-08-19 ok
lts-digital-qlab01.t-mobile.com 9 2026-06-29 2026-09-24 nodata
internal.digital-qlab01.t-mobile.com 19 2025-09-30 2026-08-19 nxdomain
es.digital-qlab01.t-mobile.com 3 2026-01-26 2026-08-19 ok
gov.digital-qlab01.t-mobile.com 19 2025-09-30 2026-08-19 nxdomain
securepay-qlab01.t-mobile.com 1 2026-07-22 2026-07-22 ok
csmbob01.t-mobile.com 1 2026-05-08 2026-05-08 nxdomain
stage01.t-mobile.com 9 2025-10-08 2026-09-14 nodata
internal.stage01.t-mobile.com 8 2025-10-08 2026-09-14 nodata
es.stage01.t-mobile.com 7 2025-08-11 2026-08-19 nxdomain
gov.stage01.t-mobile.com 8 2025-10-08 2026-09-14 nodata
internal.staging01.t-mobile.com 1 2025-10-02 2025-10-02 nxdomain
gov.staging01.t-mobile.com 1 2025-10-02 2025-10-02 nxdomain
msopol01.t-mobile.com 1 2025-09-08 2025-09-08 nxdomain
csxazprdprom01.t-mobile.com 1 2026-06-12 2026-06-12 nxdomain
csxaznpeprom01.t-mobile.com 1 2026-06-12 2026-06-12 nxdomain
msottn01.t-mobile.com 1 2025-09-08 2025-09-08 nxdomain
digital-qat01.t-mobile.com 10 2025-09-10 2026-09-15 nodata
etcheckout.qat01.t-mobile.com 3 2026-01-22 2026-02-20 ok
digital-dev01.t-mobile.com 17 2025-10-02 2026-08-19 nodata
lts-digital-dev01.t-mobile.com 16 2026-06-10 2026-09-24 nodata
internal.lts-digital-dev01.t-mobile.com 11 2026-06-18 2026-09-24 nodata
gov.lts-digital-dev01.t-mobile.com 16 2026-06-10 2026-09-24 nodata
internal.digital-dev01.t-mobile.com 17 2025-10-02 2026-08-19 nxdomain
lts-internal.digital-dev01.t-mobile.com 6 2026-06-10 2026-06-18 nodata
gov.digital-dev01.t-mobile.com 17 2025-10-02 2026-08-19 nxdomain
undesktop.euv01.t-mobile.com 12 2025-10-02 2026-08-21 ok
ums.euv01.t-mobile.com 3 2026-08-12 2026-08-12 nodata
udttgw.euv01.t-mobile.com 7 2025-10-07 2026-08-21 ok
udpxgw.euv01.t-mobile.com 5 2025-10-02 2026-08-21 ok
111111111.t-mobile.com 1 2026-07-29 2026-07-29 nxdomain
testvishal0211.t-mobile.com 1 2026-02-11 2026-02-11 nxdomain
ke911.t-mobile.com 8 2026-03-18 2026-10-02 ok
my-test-cs11.t-mobile.com 4 2026-08-13 2026-08-14 nxdomain
my-test-cs31.t-mobile.com 2 2026-08-16 2026-08-16 nxdomain
tmocommissions1710343841.t-mobile.com 5 2026-04-29 2026-08-27 ok
C205466273WTBIP91.t-mobile.com 4 2026-08-05 2026-08-05 —
c21633667csmfip91.t-mobile.com 2 2026-08-05 2026-08-05 ok
c21633667csmfit91.t-mobile.com 3 2026-08-03 2026-08-05 ok
plexpea1.t-mobile.com 1 2026-01-09 2026-01-09 nxdomain
ttexpea1.t-mobile.com 1 2026-01-14 2026-01-14 nxdomain
syncup-platform-qa1.t-mobile.com 1 2025-07-16 2025-07-16 ok
plexpresswaya1.t-mobile.com 7 2026-01-08 2026-01-09 ok
ttexpresswaya1.t-mobile.com 5 2026-01-14 2026-01-14 ok
ctm-blv-dev.lab1.t-mobile.com 5 2026-02-09 2026-02-13 nxdomain
plexpeb1.t-mobile.com 1 2025-12-09 2025-12-09 nxdomain
ttexpeb1.t-mobile.com 1 2025-12-17 2025-12-17 nxdomain
plexpresswayb1.t-mobile.com 5 2025-12-09 2025-12-09 ok
ttexpresswayb1.t-mobile.com 5 2025-12-17 2025-12-17 ok
plexpec1.t-mobile.com 1 2025-12-09 2025-12-09 nxdomain
ttexpec1.t-mobile.com 1 2025-12-09 2025-12-09 nxdomain
plexpresswayc1.t-mobile.com 5 2025-12-09 2025-12-09 ok
ttexpresswayc1.t-mobile.com 10 2025-12-08 2025-12-09 ok
prd-rbl-repdash-e1.t-mobile.com 3 2026-02-03 2026-08-12 nxdomain
daf-stg1.t-mobile.com 1 2026-02-03 2026-02-03 nodata
esim-stg1.t-mobile.com 7 2025-11-10 2026-08-25 ok
esimadmin-stg1.t-mobile.com 3 2026-03-03 2026-08-20 nodata
dafp-stg1.t-mobile.com 3 2026-03-03 2026-08-20 nxdomain
bpsp-stg1.t-mobile.com 2 2025-07-09 2026-06-04 nxdomain
sdu-stg1.t-mobile.com 5 2026-03-03 2026-08-25 ok
unionstg1.t-mobile.com 1 2025-09-08 2025-09-08 nxdomain
testvishal1.t-mobile.com 1 2026-01-09 2026-01-09 nxdomain
webmail1.t-mobile.com 2 2025-11-14 2026-05-26 ok
es.projps1.t-mobile.com 7 2025-08-11 2026-08-19 nxdomain
icpet-order-integrator-v1.t-mobile.com 1 2025-10-14 2025-10-14 nxdomain
supplierportaldev1.t-mobile.com 2 2025-08-26 2026-07-03 nxdomain
www.supplierportaldev1.t-mobile.com 3 2025-08-14 2026-07-03 nxdomain
etools.em.biz1.t-mobile.com 50 2026-04-09 2026-09-24 ok
clicks.biz1.t-mobile.com 3 2026-06-05 2026-08-26 ok
metromw-dataaccess-prod2-prd002.t-mobile.com 1 2025-08-14 2025-08-14 nxdomain
metromw-dataaccess-prod-prd002.t-mobile.com 1 2025-08-14 2025-08-14 nxdomain

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/t-mobile.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/t-mobile.com.