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) · 482 ms

HostCertsFirst seenLast seenDNS
fil.com 3 2025-11-10 2026-09-19 ok
mail11.fil.com 3 2025-09-23 2026-09-15 ok
vpn-ca1.fil.com 2 2025-08-14 2026-08-12 ok
rap-dc1.fil.com 1 2025-07-22 2025-07-22 nodata
access-edge1.fil.com 21 2026-08-21 2026-08-21 nodata
vpn-sg1.fil.com 2 2025-08-14 2026-08-12 ok
vpn-uk1.fil.com 2 2025-08-14 2026-08-12 ok
ras-uk1.fil.com 1 2026-02-02 2026-02-02 nodata
vpn-in1.fil.com 2 2025-08-14 2026-08-12 ok
vpn-jp1.fil.com 2 2025-08-14 2026-08-12 nodata
vpn-os1.fil.com 2 2025-08-14 2026-08-12 ok
neotest1.fil.com 28 2026-08-14 2026-09-11 nodata
mail12.fil.com 3 2025-09-23 2026-09-15 ok
vpn-ca2.fil.com 2 2025-08-14 2026-08-12 ok
rap-dc2.fil.com 2 2025-07-22 2025-08-02 nodata
vpn-sg2.fil.com 2 2025-08-14 2026-08-12 ok
vpn-uk2.fil.com 2 2025-08-14 2026-08-12 ok
vpn-in2.fil.com 2 2025-08-14 2026-08-12 ok
vpn-jp2.fil.com 2 2025-08-14 2026-08-12 nodata
neotest2.fil.com 12 2026-09-01 2026-09-02 nodata
mail13.fil.com 3 2025-09-23 2026-09-15 ok
apitesting123.fil.com 2 2026-08-12 2026-08-12 nodata
newtesting123.fil.com 8 2026-08-12 2026-08-19 nodata
neotest3.fil.com 4 2026-09-08 2026-09-08 nodata
mail14.fil.com 3 2025-09-23 2026-09-15 ok
neotest4.fil.com 7 2026-09-15 2026-09-28 nodata
vpn-ty4.fil.com 2 2025-08-14 2026-08-12 ok
vpn-in5.fil.com 2 2025-08-14 2026-08-12 ok
vpn-in6.fil.com 2 2025-08-14 2026-08-12 ok
ukx11997.fil.com 1 2026-03-25 2026-03-25 nodata
ukx11998.fil.com 2 2026-02-09 2026-02-10 nodata
neotest8.fil.com 10 2026-07-08 2026-07-16 nodata
*.neotest8.fil.com 1 2026-07-07 2026-07-07 —
ukx11999.fil.com 3 2026-04-10 2026-08-24 nodata
neotest9.fil.com 9 2026-08-14 2026-08-18 nodata
d-citrix-aa.fil.com 1 2025-09-09 2025-09-09 ok
np-citrix-aa.fil.com 1 2025-07-17 2025-07-17 ok
aaa.fil.com 60 2026-08-14 2026-09-28 nodata
*.aaa.fil.com 11 2026-07-07 2026-07-16 —
tpa.fil.com 2 2026-04-23 2026-04-30 ok
bbb.fil.com 3 2026-08-14 2026-08-14 nodata
*.bbb.fil.com 11 2026-07-07 2026-07-16 —
vpn-mb.fil.com 2 2025-08-14 2026-08-12 ok
prod-contenthub.fil.com 4 2025-10-13 2026-09-14 ok
cat-contenthub.fil.com 2 2025-07-18 2026-06-18 ok
qat-contenthub.fil.com 3 2025-07-07 2026-06-09 ok
dev-contenthub.fil.com 2 2025-07-01 2026-06-01 ok
prv-contenthub.fil.com 4 2025-10-14 2026-09-14 ok
isiac.fil.com 5 2025-07-28 2026-10-05 nodata
*.isiac.fil.com 5 2025-07-28 2026-10-05 —
ixhma.isiac.fil.com 1 2026-10-03 2026-10-03 nxdomain
qpgde.isiac.fil.com 1 2025-07-19 2025-07-19 nxdomain
mswui.isiac.fil.com 1 2026-07-04 2026-07-04 nxdomain
eumak.isiac.fil.com 1 2026-07-27 2026-07-27 nxdomain
bgzob-additional.isiac.fil.com 1 2026-07-04 2026-07-04 nxdomain
pmgrh-additional.isiac.fil.com 1 2026-10-03 2026-10-03 nxdomain
wwrem-additional.isiac.fil.com 1 2026-07-27 2026-07-27 nxdomain
zuvfo-additional.isiac.fil.com 1 2026-05-30 2026-05-30 nxdomain
iguqo-additional.isiac.fil.com 1 2026-06-20 2026-06-20 nxdomain
dsafq-additional.isiac.fil.com 1 2025-07-19 2025-07-19 nxdomain
xujpx-additional.isiac.fil.com 1 2026-07-24 2026-07-24 nxdomain
bgzob-optional.isiac.fil.com 1 2026-07-04 2026-07-04 nxdomain
pmgrh-optional.isiac.fil.com 1 2026-10-03 2026-10-03 nxdomain
wwrem-optional.isiac.fil.com 1 2026-07-27 2026-07-27 nxdomain
zuvfo-optional.isiac.fil.com 1 2026-05-30 2026-05-30 nxdomain
iguqo-optional.isiac.fil.com 1 2026-06-20 2026-06-20 nxdomain
dsafq-optional.isiac.fil.com 1 2025-07-19 2025-07-19 nxdomain
xujpx-optional.isiac.fil.com 1 2026-07-24 2026-07-24 nxdomain
jxdan.isiac.fil.com 1 2026-05-30 2026-05-30 nxdomain
hktdr.isiac.fil.com 1 2026-07-24 2026-07-24 nxdomain
kccks.isiac.fil.com 1 2026-06-20 2026-06-20 nxdomain
cn1.sbc.fil.com 1 2025-11-21 2025-11-21 ok
au1.sbc.fil.com 1 2025-11-21 2025-11-21 ok
cn2.sbc.fil.com 1 2025-11-21 2025-11-21 ok
au2.sbc.fil.com 1 2025-11-21 2025-11-21 ok
jpe.sbc.fil.com 2 2025-11-21 2025-12-03 ok
hkg.sbc.fil.com 2 2025-11-21 2025-12-03 ok
uk.sbc.fil.com 2 2025-11-21 2025-12-03 ok
cn.sbc.fil.com 1 2025-11-21 2025-11-21 nxdomain
ap.sbc.fil.com 2 2025-11-21 2025-12-03 ok
sgp.sbc.fil.com 2 2025-11-21 2025-12-03 ok
uks.sbc.fil.com 2 2025-11-21 2025-12-03 ok
au.sbc.fil.com 1 2025-11-21 2025-11-21 nxdomain
ukw.sbc.fil.com 2 2025-11-21 2025-12-03 ok
jpw.sbc.fil.com 2 2025-11-21 2025-12-03 ok
bot1.rec.fil.com 2 2025-09-16 2026-09-17 ok
bot2.rec.fil.com 2 2025-09-16 2026-09-17 ok
bot1-np.rec.fil.com 2 2025-08-19 2026-09-02 ok
bot2-np.rec.fil.com 2 2025-08-19 2026-09-02 ok
hooks.np.platform-sec.fil.com 1 2026-07-03 2026-07-03 servfail
metrics-hook.pd.itc.fil.com 1 2025-11-24 2025-11-24 ok
github-metrics.pd.itc.fil.com 1 2025-11-24 2025-11-24 ok
hooks.pd.itc.fil.com 2 2025-08-10 2026-07-11 ok
*.np.itc.fil.com 1 2026-05-22 2026-05-22 —
github-metrics-cf.np.itc.fil.com 4 2025-11-19 2025-12-02 nxdomain
enterprise-hook.np.itc.fil.com 2 2026-05-20 2026-05-21 nxdomain
metrics-hook.np.itc.fil.com 2 2025-11-19 2025-11-19 ok
kaizen-mcp.np.itc.fil.com 1 2025-07-31 2025-07-31 nxdomain
github-metrics.np.itc.fil.com 2 2025-11-19 2025-11-19 nxdomain
hooks.np.itc.fil.com 2 2025-08-10 2026-07-11 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/fil.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/fil.com.