Check-Host.cc

Domain

first.is

Aggregated from public BGP, CT logs, our scan layer, honeypots and global probes.

Run a live full scan of first.is

On-demand: ports, banners, TLS, tech-stack, subdomains and origin/IP-leak detection. Results are shared publicly for everyone to link to.

Deep-scan now
Hosting IPs
A/AAAA targets
Subdomains
CT + scan + body
Record Types
seen in DNS
Observed Certs
in our scans

DNS Records

A
AAAA
MX
NS
TXT
CNAME
CAA

WHOIS / Registration

Registration data planned

Registrar, creation/expiry dates and domain status via RDAP. Rolling out gradually — bulk WHOIS is rate-limited, so we resolve on a prioritized cadence.

Subdomains

Every subdomain we know about — harvested from CT-log SANs, scan-observed certs and HTML body references — paired with its current A/AAAA target.

Subdomain Resolves to Last seen
1lle.first.is 2026-06-23 03:01:45.951
2s.first.is 2026-06-21 10:56:40.351
64492d45-88ff-43ab-8b76-5bbbcd0f129b.first.is 2026-06-24 06:51:18.880
8c53cf22-1c8b-40ba-9df8-fa5fe902aa2f.first.is 2026-06-24 00:26:21.061
9d.first.is
1970-01-01 00:00:00.000
abovestated.first.is 2026-07-26 19:56:08.227
account.first.is 2026-07-30 08:12:37.366
accounts.first.is 2026-07-30 08:12:37.366
admin.first.is 2026-07-30 08:12:37.366
administrator.first.is 2026-07-30 08:12:37.366
alertmanager.first.is 2026-07-30 08:12:37.366
alpha.first.is 2026-07-30 08:12:37.366
amagrams.first.is 2026-07-25 14:16:52.887
analytics.first.is
1970-01-01 00:00:00.000
api-v1.first.is 2026-07-30 08:12:37.366
api-v2.first.is 2026-07-30 08:12:37.366
api.first.is 2026-07-30 08:12:37.366
api1.first.is 2026-07-30 08:12:37.366
api2.first.is 2026-07-30 08:12:37.366
app.email.first.is
1970-01-01 00:00:00.000
app.first.is 2026-07-30 08:12:37.366
apps.first.is 2026-07-30 08:12:37.366
archive.first.is 2026-07-30 08:12:37.366
argocd.first.is 2026-07-30 08:12:37.366
args.first.is
1970-01-01 00:00:00.000
arr.first.is 2026-06-24 00:26:21.061
artifactory.first.is 2026-07-30 08:12:37.366
asabovestated.first.is 2026-07-16 09:57:38.390
assets.first.is 2026-07-30 08:12:37.366
auth.first.is 2026-07-30 08:12:37.366
autoconfig.first.is 2026-07-30 08:12:37.366
autoconfig.phila-delphia.first.is
1970-01-01 00:00:00.000
autodiscover.first.is 2026-07-30 08:12:37.366
backup.first.is 2026-07-30 08:12:37.366
backups.first.is 2026-07-30 08:12:37.366
balancer.first.is 2026-07-30 08:12:37.366
bamboo.first.is 2026-07-30 08:12:37.366
bastion.first.is 2026-07-30 08:12:37.366
beautiful.november.first.is 2026-06-19 03:32:25.859
beta.first.is 2026-07-30 08:12:37.366
bill.first.is
1970-01-01 00:00:00.000
billing.first.is 2026-07-30 08:12:37.366
bitbucket.first.is 2026-07-30 08:12:37.366
blog.first.is 2026-07-30 08:12:37.366
board.first.is 2026-07-17 11:49:34.123
bounce.first.is 2026-07-30 08:12:37.366
breakfast.first.is 2026-06-25 02:31:22.569
build.first.is 2026-07-30 08:12:37.366
but.first.is 2026-06-24 00:26:21.061
buy.first.is 2026-07-30 08:12:37.366
buzz.first.is 2026-06-24 00:26:21.061
cache.first.is 2026-07-30 08:12:37.366
cacti.first.is 2026-07-30 08:12:37.366
canary.first.is 2026-07-30 08:12:37.366
canteen.first.is 2026-06-16 21:38:25.502
cart.first.is 2026-07-30 08:12:37.366
cd.first.is 2026-07-30 08:12:37.366
cdn.first.is 2026-07-30 08:12:37.366
cells.first.is
1970-01-01 00:00:00.000
checkout.first.is 2026-07-30 08:12:37.366
ci.first.is 2026-07-30 08:12:37.366
circleci.first.is 2026-07-30 08:12:37.366
community.first.is 2026-07-30 08:12:37.366
confluence.first.is 2026-07-30 08:12:37.366
console.first.is 2026-07-30 08:12:37.366
control.first.is 2026-07-30 08:12:37.366
corp.first.is 2026-07-30 08:12:37.366
cp.first.is 2026-07-30 08:12:37.366
cpanel.first.is 2026-07-30 08:12:37.366
dashboard.first.is 2026-07-30 08:12:37.366
database.first.is 2026-07-30 08:12:37.366
datadog.first.is 2026-07-30 08:12:37.366
db.first.is 2026-07-30 08:12:37.366
deliveries.first.is
1970-01-01 00:00:00.000
demo.first.is 2026-07-30 08:12:37.366
deploy.first.is 2026-07-30 08:12:37.366
depresented.first.is 2026-06-24 00:26:21.061
deputy.first.is
1970-01-01 00:00:00.000
dev.first.is 2026-07-30 08:12:37.366
develop.first.is 2026-07-30 08:12:37.366
development.first.is 2026-07-30 08:12:37.366
df1715f2-478a-4236-b047-d500f39b48d0.first.is
1970-01-01 00:00:00.000
directadmin.first.is 2026-07-30 08:12:37.366
dkujlxwq.first.is
1970-01-01 00:00:00.000
dl.first.is 2026-07-30 08:12:37.366
dns.first.is 2026-07-30 08:12:37.366
dns1.first.is 2026-07-30 08:12:37.366
dns2.first.is 2026-07-30 08:12:37.366
docker.first.is 2026-07-30 08:12:37.366
docs.first.is 2026-07-30 08:12:37.366
documentation.first.is 2026-07-30 08:12:37.366
dod.first.is
1970-01-01 00:00:00.000
downloads.first.is 2026-07-30 08:12:37.366
ebmail.first.is
1970-01-01 00:00:00.000
edge.first.is 2026-07-30 08:12:37.366
elastic.first.is 2026-07-30 08:12:37.366
encrypt.first.is 2026-07-30 08:12:37.366
es.first.is 2026-07-30 08:12:37.366
etc.first.is 2026-06-21 15:12:08.755
events.first.is 2026-07-30 08:12:37.366
exchange.first.is 2026-07-30 08:12:37.366
fewquestions.first.is 2026-07-17 22:46:49.945
files.first.is 2026-07-30 08:12:37.366
firewall.first.is 2026-07-30 08:12:37.366
first.is
1970-01-01 00:00:00.000
form.first.is
1970-01-01 00:00:00.000
forum.email.first.is 2026-06-21 01:15:54.765
forum.first.is 2026-07-30 08:12:37.366
found.first.is
1970-01-01 00:00:00.000
foundations.first.is
1970-01-01 00:00:00.000
free.first.is
1970-01-01 00:00:00.000
ftp.first.is 2026-07-30 08:12:37.366
furst.first.is
1970-01-01 00:00:00.000
fw.first.is 2026-07-30 08:12:37.366
fzjywwiki.delphia.first.is
1970-01-01 00:00:00.000
gateway.first.is 2026-07-30 08:12:37.366
gd.first.is 2026-06-24 00:26:21.061
gen.first.is
1970-01-01 00:00:00.000
git.first.is 2026-07-30 08:12:37.366
gitea.first.is 2026-07-30 08:12:37.366

Tech Stack

Tech detection pending

Wappalyzer-rules detect CMS, frameworks, analytics, JS libs and server-side languages on this domain.

TLS Certificates

Certificate observations pending

TLS certs naming this domain in subject or SANs will appear here as our scan-layer catches them.

IPs Citing This Domain

No citing IPs found yet

As the world-sweep progresses, hosts referencing this domain in their HTML will surface here.

Origin / IP-Leak

USP

When a hostname is served behind a CDN (e.g. Cloudflare), the origin server can sometimes be identified by matching its TLS cert against the protected hostname. Findings shown here are heuristic candidates, not guarantees.

No origin-IP leaks detected (yet)

Either this domain doesn't sit behind a CDN, or we haven't seen a TLS cert from a non-CDN IP matching this hostname. Run a fullscan to refresh the cert→IP cross-reference.

Threat Intelligence

Domain threat-intel pending

Matches in URLhaus, OpenPhish, PhishTank, malware feeds, and Spamhaus DBL.

History

Domain timeline pending

Passive-DNS history accumulates as our forward-DNS crawler observes A/AAAA/MX/NS/TXT records over time.