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) · 577 ms

HostCertsFirst seenLast seenDNS
grammarly.com 3 2025-07-23 2026-06-23 ok
coda.grammarly.com 3 2025-06-13 2026-06-26 ok
iosapp-alpha.grammarly.com 2 2025-08-19 2026-07-20 ok
adminka.grammarly.com 3 2026-01-15 2026-09-30 ok
data.grammarly.com 2 2025-11-17 2026-03-15 ok
iosapp-beta.grammarly.com 2 2025-08-18 2026-07-19 ok
static-web.grammarly.com 2 2025-06-19 2026-05-20 ok
denali-fb.grammarly.com 2 2025-08-03 2026-07-04 ok
*.denali-fb.grammarly.com 2 2025-08-03 2026-07-04 —
download-mac.grammarly.com 2 2025-08-03 2026-07-04 ok
apps-public.grammarly.com 3 2025-09-07 2026-08-08 ok
static.grammarly.com 2 2026-03-18 2026-08-18 ok
contenthub-static.grammarly.com 2 2026-03-18 2026-08-18 ok
denali-static.grammarly.com 2 2025-08-17 2026-07-18 ok
login-static.grammarly.com 1 2025-10-07 2025-10-07 nodata
applet-bundles-static.grammarly.com 2 2025-07-10 2026-06-10 ok
msync.grammarly.com 2 2025-10-07 2025-11-19 ok
ed.grammarly.com 3 2025-07-23 2026-06-23 ok
capi-restricted.grammarly.com 1 2026-09-23 2026-09-23 ok
id.grammarly.com 3 2025-07-23 2026-06-23 ok
brand.grammarly.com 2 2026-02-22 2026-07-10 ok
image.send.grammarly.com 3 2026-03-19 2026-09-20 ok
download-office.grammarly.com 2 2025-08-03 2026-07-04 ok
engage.grammarly.com 3 2026-06-16 2026-08-25 ok
knowledge.grammarly.com 1 2025-11-10 2025-11-10 nodata
fridge.grammarly.com 2 2025-10-12 2026-09-12 ok
static.fridge.grammarly.com 2 2025-10-12 2026-09-12 ok
download-bundle.grammarly.com 2 2025-08-03 2026-07-04 ok
gate.grammarly.com 2 2025-11-06 2025-12-30 ok
goldengate.grammarly.com 3 2025-10-16 2025-12-30 ok
contenthub-private.grammarly.com 3 2026-03-19 2026-08-19 ok
msync-private.grammarly.com 2 2025-10-07 2025-11-19 ok
facade-private.grammarly.com 3 2025-09-27 2026-01-27 ok
api.mise-private.grammarly.com 2 2026-04-27 2026-09-27 ok
auth-private.grammarly.com 3 2025-08-30 2026-07-31 ok
sentinel-private.grammarly.com 4 2025-08-11 2026-08-20 ok
dox-private.grammarly.com 2 2025-08-30 2026-06-12 ok
facade.private.grammarly.com 3 2025-09-27 2026-01-27 ok
auth.private.grammarly.com 3 2025-08-30 2026-07-31 ok
capi.private.grammarly.com 2 2026-03-09 2026-07-25 nodata
sentinel.private.grammarly.com 4 2025-08-11 2026-08-20 ok
subscription.private.grammarly.com 2 2025-06-24 2026-05-25 ok
internal.subscription.private.grammarly.com 1 2026-01-15 2026-01-15 ok
sso.private.grammarly.com 3 2025-08-06 2026-07-07 ok
access-manager.private.grammarly.com 4 2025-08-09 2026-08-18 ok
tokens.private.grammarly.com 3 2025-08-30 2025-11-14 ok
apps.private.grammarly.com 2 2025-09-06 2026-08-07 ok
invite.grammarly.com 3 2025-07-22 2026-06-22 ok
billing.grammarly.com 2 2025-08-26 2025-11-14 ok
api.billing.grammarly.com 2 2025-08-27 2025-11-14 ok
blog.grammarly.com 3 2025-07-23 2026-06-23 ok
www.blog.grammarly.com 3 2025-07-23 2026-06-23 ok
tech.grammarly.com 3 2025-07-21 2026-06-21 ok
research.grammarly.com 9 2026-05-30 2026-09-25 ok
auth.grammarly.com 4 2025-08-07 2025-11-17 ok
api.grammarly.com 3 2025-08-14 2025-12-30 ok
capi.grammarly.com 1 2025-12-14 2025-12-14 ok
private-k8s-capi.grammarly.com 2 2026-03-09 2026-07-25 ok
*.private-k8s-capi.grammarly.com 2 2026-03-09 2026-07-25 —
*.k8s-capi.grammarly.com 1 2025-12-14 2025-12-14 —
click.grammarly.com 2 2025-06-19 2026-05-20 ok
capi-msdk.grammarly.com 1 2025-12-14 2025-12-14 ok
handbook.grammarly.com 3 2025-07-23 2026-06-23 ok
data-internal.grammarly.com 2 2026-01-12 2026-03-16 ok
bixby-internal.grammarly.com 2 2025-12-04 2025-12-13 nodata
geoproximity.bixby-internal.grammarly.com 2 2025-12-14 2025-12-14 nxdomain
g-mail.internal.grammarly.com 2 2025-11-19 2026-03-01 ok
redirect.internal.grammarly.com 1 2025-11-14 2025-11-14 ok
sentinel.grammarly.com 4 2025-08-11 2026-08-20 ok
g-mail.grammarly.com 2 2025-11-19 2026-03-16 ok
nspl.grammarly.com 3 2025-07-23 2026-06-23 ok
www.nspl.grammarly.com 3 2025-07-23 2026-06-23 ok
m.grammarly.com 3 2025-07-23 2026-06-23 ok
in.grammarly.com 2 2026-02-24 2026-07-12 ok
ingest.sensitive.in.grammarly.com 2 2026-08-21 2026-08-21 nxdomain
internal.in.grammarly.com 3 2026-03-24 2026-08-24 nxdomain
officeaddin.grammarly.com 3 2025-10-16 2026-09-15 ok
update-officeaddin.grammarly.com 2 2025-09-06 2026-08-06 ok
login.grammarly.com 1 2025-06-18 2025-06-18 nodata
private.login.grammarly.com 1 2025-06-18 2025-06-18 nxdomain
config-qa.extension.grammarly.com 1 2026-01-05 2026-01-05 ok
config.extension.grammarly.com 1 2026-01-05 2026-01-05 ok
assets.extension.grammarly.com 1 2026-01-05 2026-01-05 ok
click.notification.grammarly.com 2 2026-03-26 2026-08-26 ok
uifoundation.grammarly.com 1 2026-01-21 2026-01-21 ok
stripe-integration.grammarly.com 1 2025-12-02 2025-12-02 ok
verifi-integration.grammarly.com 1 2025-12-02 2025-12-02 ok
lti-integration.grammarly.com 1 2025-11-10 2025-11-10 ok
chargeback-prevention.grammarly.com 2 2025-09-19 2025-12-02 ok
subscription.grammarly.com 3 2025-06-24 2026-05-25 ok
static.institution.grammarly.com 2 2025-10-15 2026-09-15 ok
go.grammarly.com 9 2026-04-19 2026-09-15 ok
hello.grammarly.com 6 2026-05-14 2026-08-21 ok
demo.grammarly.com 3 2026-04-25 2026-09-25 ok
sso.grammarly.com 4 2025-08-06 2026-09-06 ok
authorship.grammarly.com 2 2025-08-01 2026-07-02 ok
app.grammarly.com 2 2025-08-17 2026-07-18 ok
iosapp.grammarly.com 2 2025-08-20 2026-07-21 ok
gnar.grammarly.com 2 2025-07-06 2026-06-06 ok
developer.grammarly.com 1 2025-11-10 2025-11-10 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/grammarly.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/grammarly.com.