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.

37 hosts · 296 ms

HostCertsFirst seenLast seenDNS
railtel.in 1 2026-02-27 2026-02-27 ok
*.railtel.in 1 2026-02-27 2026-02-27 —
edc.railtel.in 1 2026-03-20 2026-03-20 nodata
*.edc.railtel.in 1 2026-03-20 2026-03-20 —
dashboard.cnoc.railtel.in 3 2026-05-15 2026-08-13 servfail
lookingglass.cnoc.railtel.in 3 2026-06-08 2026-09-24 servfail
apilookingglass.cnoc.railtel.in 3 2026-06-08 2026-08-13 servfail
rwont.cnoc.railtel.in 3 2026-04-10 2026-07-16 servfail
fiber.api.railtel.in 3 2026-06-08 2026-08-13 servfail
customer-services.api.railtel.in 3 2026-05-16 2026-08-13 servfail
sm-dev.api.railtel.in 2 2026-06-08 2026-06-08 servfail
topology.api.railtel.in 2 2026-06-08 2026-06-08 servfail
gitlab.app.railtel.in 3 2026-05-15 2026-08-13 servfail
id.app.railtel.in 3 2026-06-08 2026-08-13 servfail
gisservice.app.railtel.in 2 2026-06-08 2026-06-08 servfail
ai.app.railtel.in 2 2026-05-15 2026-05-15 servfail
sso.app.railtel.in 3 2026-06-08 2026-08-13 servfail
admin.sso.app.railtel.in 2 2026-05-15 2026-05-15 servfail
gismap.app.railtel.in 2 2026-06-08 2026-06-08 servfail
gisapp.app.railtel.in 2 2026-06-08 2026-06-08 servfail
wrnms.app.railtel.in 3 2026-05-15 2026-08-13 servfail
chat.app.railtel.in 3 2026-05-15 2026-09-24 servfail
gpt.app.railtel.in 2 2026-05-15 2026-05-15 servfail
topology.app.railtel.in 2 2026-06-08 2026-06-08 servfail
registry.app.railtel.in 3 2026-05-15 2026-09-24 servfail
switch.nms.railtel.in 3 2026-06-08 2026-08-13 servfail
fiber.nms.railtel.in 3 2026-06-08 2026-08-13 servfail
router.nms.railtel.in 2 2026-06-08 2026-06-08 servfail
enterpriseenrollment.railtel.in 3 2026-06-03 2026-08-03 ok
sec.speedtest.railtel.in 4 2026-05-13 2026-05-14 ok
pnbe.speedtest.railtel.in 1 2026-09-19 2026-09-19 ok
lko.speedtest.railtel.in 5 2026-04-24 2026-08-22 ok
ngp.speedtest.railtel.in 3 2026-06-10 2026-08-10 ok
bsp.speedtest.railtel.in 5 2026-05-12 2026-09-09 ok
bbs.speedtest.railtel.in 5 2026-05-05 2026-09-03 ok
ers.speedtest.railtel.in 3 2026-04-12 2026-06-12 ok
assist.railtel.in 1 2026-09-09 2026-09-09 ok

Programmatic access, with DNS A records: API GET /v1/hosts/railtel.in (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/railtel.in.