4opt.it
Aggregated from public BGP, CT logs, our scan layer, honeypots and global probes.
Run a live full scan of 4opt.it
On-demand: ports, banners, TLS, tech-stack, subdomains and origin/IP-leak detection. Results are shared publicly for everyone to link to.
DNS Records
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 |
|---|---|---|
| www.4opt.it | 2026-08-27 06:30:50.868 | |
| 4opt.it | 2026-08-24 09:48:50.366 |
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
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.
CT-Log Evidence
Certificates from public Certificate Transparency logs whose subject or SAN names this domain — including historic certs we never observed live.
Threat Intelligence
Domain threat-intel pending
Matches in URLhaus, OpenPhish, PhishTank, malware feeds, and Spamhaus DBL.
History
Passive DNS — every value this name ever resolved to and when we first / last observed it. Updates every cycle of our forward-DNS crawler.
| Type | Value | First seen | Last seen |
|---|---|---|---|
| NS | dns.technorail.com | 2026-08-14 23:40:45.374 | 2026-08-24 09:48:50.366 |
| SRV | _autodiscover._tcp 0 0 443 autodiscover.aruba.it | 2026-08-14 23:40:45.374 | 2026-08-24 09:48:50.366 |
| A | 199.36.158.100 | 2026-08-14 23:40:45.374 | 2026-08-24 09:48:50.366 |
| TXT | google-site-verification=lsahh7zRyRdjCPgT-E7DMV5U63JMwROoEZYI0ZFn_9o | 2026-08-14 23:40:45.374 | 2026-08-24 09:48:50.366 |
| SRV | _xmpp-client._tcp 5 0 5222 imchat1.aruba.it | 2026-08-14 23:40:45.374 | 2026-08-24 09:48:50.366 |
| NS | dns3.arubadns.net | 2026-08-14 23:40:45.374 | 2026-08-24 09:48:50.366 |
| NS | dns4.arubadns.cz | 2026-08-14 23:40:45.374 | 2026-08-24 09:48:50.366 |
| TXT | hosting-site=opt-b68bf | 2026-08-14 23:40:45.374 | 2026-08-24 09:48:50.366 |
| MX | 10 mx.4opt.it | 2026-08-14 23:40:45.374 | 2026-08-24 09:48:50.366 |
| SRV | _xmpp-server._tcp 5 0 5269 imchat1.aruba.it | 2026-08-14 23:40:45.374 | 2026-08-24 09:48:50.366 |
| TXT | v=spf1 include:_spf.aruba.it ~all | 2026-08-14 23:40:45.374 | 2026-08-24 09:48:50.366 |
| NS | dns2.technorail.com | 2026-08-14 23:40:45.374 | 2026-08-24 09:48:50.366 |