Find every subdomain
of a domain.

Every hostname under a domain that ever appeared in a public TLS certificate — with certificate counts and first/last seen dates.

100 hosts (first page) · 232 ms

HostCertsFirst seenLast seen
sophos.com 9 2025-07-10 2026-08-19
*.sophos.com 7 2025-07-10 2026-10-08
pmx-static-uk1.sophos.com 2 2026-04-21 2026-10-07
labs-api-2.sophos.com 2 2025-07-11 2026-06-10
central-2.sophos.com 16 2025-11-13 2026-09-30
qa.central-2.sophos.com 16 2025-11-13 2026-09-30
*.qa.central-2.sophos.com 16 2025-11-13 2026-09-30
pre-prod.central-2.sophos.com 16 2025-11-13 2026-09-30
*.pre-prod.central-2.sophos.com 5 2026-09-30 2026-09-30
dev.central-2.sophos.com 16 2025-11-13 2026-09-30
*.dev.central-2.sophos.com 16 2025-11-13 2026-09-30
www.central-2.sophos.com 16 2025-11-13 2026-09-30
secure2.sophos.com 7 2026-05-07 2026-08-19
mysophos-static-dev3.sophos.com 2 2025-10-14 2026-09-14
ap-south-1.qa.o365.sophos.com 1 2026-04-30 2026-04-30
80tjj621.ap-south-1.qa.o365.sophos.com 8 2025-06-12 2026-08-18
vl7uf4r2.ap-south-1.qa.o365.sophos.com 4 2025-06-12 2026-05-13
u1aaacc5.ap-south-1.qa.o365.sophos.com 4 2025-10-27 2026-10-07
ai6t8l68.ap-south-1.qa.o365.sophos.com 2 2025-10-28 2026-09-28
api-int-ms-entra.ap-south-1.qa.o365.sophos.com 3 2026-03-24 2026-08-24
mgird0tc.ap-south-1.qa.o365.sophos.com 3 2025-09-26 2026-08-27
jpc3vmed.ap-south-1.qa.o365.sophos.com 2 2025-07-21 2026-06-21
xdi-worker-shared.ap-south-1.qa.o365.sophos.com 4 2025-06-12 2026-05-13
yoqq91uf.ap-south-1.qa.o365.sophos.com 1 2025-12-17 2025-12-17
avzyg7mg.ap-south-1.qa.o365.sophos.com 2 2025-08-06 2026-07-07
api.ap-south-1.qa.o365.sophos.com 1 2026-01-06 2026-01-06
5uzu5ffj.ap-south-1.qa.o365.sophos.com 1 2025-12-11 2025-12-11
530tpzol.ap-south-1.qa.o365.sophos.com 2 2025-10-09 2026-09-09
google-integration.ap-south-1.qa.o365.sophos.com 8 2025-09-15 2026-09-09
o365-orchestrator.ap-south-1.qa.o365.sophos.com 4 2025-10-27 2026-10-07
mfr-connector.ap-south-1.qa.o365.sophos.com 2 2025-12-11 2025-12-17
xdr-o365-ingestor.ap-south-1.qa.o365.sophos.com 4 2025-07-21 2026-07-07
xdr-data-ingestor.ap-south-1.qa.o365.sophos.com 8 2025-06-12 2026-08-18
pnyq60tr.ap-south-1.qa.o365.sophos.com 3 2026-03-24 2026-08-24
api-int-ms-entra-alt.ap-south-1.qa.o365.sophos.com 3 2026-03-24 2026-08-24
xdi-worker-shared-alt.ap-south-1.qa.o365.sophos.com 4 2025-06-12 2026-05-13
google-integration-alt.ap-south-1.qa.o365.sophos.com 5 2025-09-15 2026-09-09
o365-orchestrator-alt.ap-south-1.qa.o365.sophos.com 4 2025-10-27 2026-10-07
mfr-connector-alt.ap-south-1.qa.o365.sophos.com 2 2025-12-11 2025-12-17
xdr-o365-ingestor-alt.ap-south-1.qa.o365.sophos.com 2 2025-07-21 2026-06-21
xdr-data-ingestor-alt.ap-south-1.qa.o365.sophos.com 8 2025-06-12 2026-08-18
o365-gateway-alt.ap-south-1.qa.o365.sophos.com 2 2025-10-28 2026-09-28
gw.ap-south-1.qa.o365.sophos.com 1 2026-10-07 2026-10-07
internal-gw.ap-south-1.qa.o365.sophos.com 1 2026-10-07 2026-10-07
1firpxxx.ap-south-1.qa.o365.sophos.com 3 2025-09-15 2026-08-16
o365-gateway.ap-south-1.qa.o365.sophos.com 2 2025-10-28 2026-09-28
trino-gateway.ap-south-1.qa.o365.sophos.com 1 2026-10-07 2026-10-07
me-central-1.qa.o365.sophos.com 2 2025-08-26 2025-09-03
iucqoek7.me-central-1.qa.o365.sophos.com 1 2025-09-16 2025-09-16
l5jq1bq9.me-central-1.qa.o365.sophos.com 1 2025-09-23 2025-09-23
q6hnwndc.me-central-1.qa.o365.sophos.com 1 2025-09-13 2025-09-13
xdi-worker-shared.me-central-1.qa.o365.sophos.com 1 2025-09-23 2025-09-23
4qkc537g.me-central-1.qa.o365.sophos.com 1 2025-09-17 2025-09-17
api.me-central-1.qa.o365.sophos.com 2 2025-08-26 2025-09-03
2lce39cl.me-central-1.qa.o365.sophos.com 1 2025-10-03 2025-10-03
2ct4ghyl.me-central-1.qa.o365.sophos.com 1 2025-09-10 2025-09-10
google-integration.me-central-1.qa.o365.sophos.com 1 2025-09-17 2025-09-17
o365-orchestrator.me-central-1.qa.o365.sophos.com 1 2025-09-10 2025-09-10
mfr-connector.me-central-1.qa.o365.sophos.com 2 2025-09-13 2025-10-03
xdr-o365-ingestor.me-central-1.qa.o365.sophos.com 1 2025-09-16 2025-09-16
xdr-data-ingestor.me-central-1.qa.o365.sophos.com 1 2025-09-23 2025-09-23
xdi-worker-shared-alt.me-central-1.qa.o365.sophos.com 1 2025-09-23 2025-09-23
google-integration-alt.me-central-1.qa.o365.sophos.com 1 2025-09-17 2025-09-17
o365-orchestrator-alt.me-central-1.qa.o365.sophos.com 1 2025-09-10 2025-09-10
mfr-connector-alt.me-central-1.qa.o365.sophos.com 2 2025-09-13 2025-10-03
xdr-o365-ingestor-alt.me-central-1.qa.o365.sophos.com 1 2025-09-16 2025-09-16
xdr-data-ingestor-alt.me-central-1.qa.o365.sophos.com 1 2025-09-23 2025-09-23
o365-gateway-alt.me-central-1.qa.o365.sophos.com 1 2025-09-16 2025-09-16
6e9s79ux.me-central-1.qa.o365.sophos.com 1 2025-09-23 2025-09-23
o365-gateway.me-central-1.qa.o365.sophos.com 1 2025-09-16 2025-09-16
11fc0iaz.me-central-1.qa.o365.sophos.com 1 2025-09-16 2025-09-16
api.eu-central-1.qa.o365.sophos.com 2 2025-07-30 2026-06-29
api.sa-east-1.qa.o365.sophos.com 1 2026-01-28 2026-01-28
api.ap-northeast-1.qa.o365.sophos.com 1 2025-11-25 2025-11-25
api.eu-west-1.qa.o365.sophos.com 2 2025-07-27 2026-06-25
us-west-2.qa.o365.sophos.com 1 2026-04-30 2026-04-30
wlay4pi0.us-west-2.qa.o365.sophos.com 2 2025-07-21 2026-06-21
b500svk1.us-west-2.qa.o365.sophos.com 3 2025-10-20 2026-09-20
78csk91a.us-west-2.qa.o365.sophos.com 2 2025-10-23 2026-09-23
api-int-ms-entra.us-west-2.qa.o365.sophos.com 3 2026-03-24 2026-08-24
i04pk4cb.us-west-2.qa.o365.sophos.com 3 2025-10-13 2026-09-13
xdi-worker-shared.us-west-2.qa.o365.sophos.com 5 2026-03-23 2026-08-23
1qsulpzd.us-west-2.qa.o365.sophos.com 3 2025-09-15 2026-08-16
hpaafeeg.us-west-2.qa.o365.sophos.com 4 2025-10-30 2026-10-07
kqe4ca9h.us-west-2.qa.o365.sophos.com 3 2026-03-24 2026-08-24
api.us-west-2.qa.o365.sophos.com 2 2025-07-30 2026-06-29
rouzsmyl.us-west-2.qa.o365.sophos.com 2 2025-10-29 2026-09-29
mey45x9m.us-west-2.qa.o365.sophos.com 5 2026-03-23 2026-08-23
google-integration.us-west-2.qa.o365.sophos.com 6 2025-09-15 2026-09-13
ys5s3eqq.us-west-2.qa.o365.sophos.com 5 2026-03-23 2026-08-23
o365-orchestrator.us-west-2.qa.o365.sophos.com 8 2025-10-27 2026-10-07
mfr-connector.us-west-2.qa.o365.sophos.com 2 2025-12-11 2025-12-19
xdr-o365-ingestor.us-west-2.qa.o365.sophos.com 2 2025-07-21 2026-06-21
xdr-data-ingestor.us-west-2.qa.o365.sophos.com 5 2026-03-23 2026-08-23
hfwunqbt.us-west-2.qa.o365.sophos.com 1 2025-12-11 2025-12-11
api-int-ms-entra-alt.us-west-2.qa.o365.sophos.com 3 2026-03-24 2026-08-24
xdi-worker-shared-alt.us-west-2.qa.o365.sophos.com 5 2026-03-23 2026-08-23
google-integration-alt.us-west-2.qa.o365.sophos.com 6 2025-09-15 2026-09-13
o365-orchestrator-alt.us-west-2.qa.o365.sophos.com 8 2025-10-27 2026-10-07
mfr-connector-alt.us-west-2.qa.o365.sophos.com 2 2025-12-11 2025-12-19

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/sophos.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/sophos.com.