Check-Host.cc

Domain

extern.facebook.com

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

Run a live full scan of extern.facebook.com

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
12
A/AAAA targets
Subdomains
CT + scan + body
Record Types
3
seen in DNS
Observed Certs
483
in our scans

DNS Records

A
157.240.0.8, 157.240.253.18, 157.240.27.9, 157.240.9.7, 57.144.222.146, 57.144.244.146
AAAA
2a03:2880:f028:6:face:b00c:0:7c8d, 2a03:2880:f03f:9:face:b00c:0:7c8d, 2a03:2880:f083:113:face:b00c:0:7c8d, 2a03:2880:f084:108:face:b00c:0:7c8d, 2a03:2880:f36f:92:face:b00c:0:7c8d, 2a03:2880:f37a:92:face:b00c:0:7c8d
MX
NS
TXT
v=spf1 a ~all
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

Subdomain enumeration pending

Every subdomain ever issued a TLS cert under this apex — extracted from Certificate Transparency logs, our own scan observations and body references.

Tech Stack

Tech detection pending

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

TLS Certificates

Subject: *.extern.facebook.com
Issuer: DigiCert Global G2 TLS RSA SHA256 2020 CA1
SANs: *.extern.facebook.com, extern.facebook.com
Subject: *.extern.facebook.com
Issuer: DigiCert Global G2 TLS RSA SHA256 2020 CA1
SANs: *.extern.facebook.com, extern.facebook.com
Subject: *.extern.facebook.com
Issuer: DigiCert Global G2 TLS RSA SHA256 2020 CA1
SANs: *.extern.facebook.com, extern.facebook.com
Subject: *.extern.facebook.com
Issuer: DigiCert Global G2 TLS RSA SHA256 2020 CA1
SANs: *.extern.facebook.com, extern.facebook.com
Subject: *.extern.facebook.com
Issuer: DigiCert Global G2 TLS RSA SHA256 2020 CA1
SANs: *.extern.facebook.com, extern.facebook.com
Subject: *.extern.facebook.com
Issuer: DigiCert Global G2 TLS RSA SHA256 2020 CA1
SANs: *.extern.facebook.com, extern.facebook.com
Subject: *.extern.facebook.com
Issuer: DigiCert Global G2 TLS RSA SHA256 2020 CA1
SANs: *.extern.facebook.com, extern.facebook.com
Subject: *.extern.facebook.com
Issuer: DigiCert Global G2 TLS RSA SHA256 2020 CA1
SANs: *.extern.facebook.com, extern.facebook.com
Subject: *.extern.facebook.com
Issuer: DigiCert Global G2 TLS RSA SHA256 2020 CA1
SANs: *.extern.facebook.com, extern.facebook.com
Subject: *.extern.facebook.com
Issuer: DigiCert Global G2 TLS RSA SHA256 2020 CA1
SANs: *.extern.facebook.com, extern.facebook.com
Subject: *.extern.facebook.com
Issuer: DigiCert Global G2 TLS RSA SHA256 2020 CA1
SANs: *.extern.facebook.com, extern.facebook.com
Subject: *.extern.facebook.com
Issuer: DigiCert Global G2 TLS RSA SHA256 2020 CA1
SANs: *.extern.facebook.com, extern.facebook.com
Subject: *.extern.facebook.com
Issuer: DigiCert Global G2 TLS RSA SHA256 2020 CA1
SANs: *.extern.facebook.com, extern.facebook.com
Subject: *.extern.facebook.com
Issuer: DigiCert Global G2 TLS RSA SHA256 2020 CA1
SANs: *.extern.facebook.com, extern.facebook.com
Subject: *.extern.facebook.com
Issuer: DigiCert Global G2 TLS RSA SHA256 2020 CA1
SANs: *.extern.facebook.com, extern.facebook.com
Subject: *.extern.facebook.com
Issuer: DigiCert Global G2 TLS RSA SHA256 2020 CA1
SANs: *.extern.facebook.com, extern.facebook.com
Subject: *.extern.facebook.com
Issuer: DigiCert Global G2 TLS RSA SHA256 2020 CA1
SANs: *.extern.facebook.com, extern.facebook.com
Subject: *.extern.facebook.com
Issuer: DigiCert Global G2 TLS RSA SHA256 2020 CA1
SANs: *.extern.facebook.com, extern.facebook.com
Subject: *.extern.facebook.com
Issuer: DigiCert Global G2 TLS RSA SHA256 2020 CA1
SANs: *.extern.facebook.com, extern.facebook.com
Subject: *.extern.facebook.com
Issuer: DigiCert Global G2 TLS RSA SHA256 2020 CA1
SANs: *.extern.facebook.com, extern.facebook.com
Subject: *.extern.facebook.com
Issuer: DigiCert Global G2 TLS RSA SHA256 2020 CA1
SANs: *.extern.facebook.com, extern.facebook.com
Subject: *.extern.facebook.com
Issuer: DigiCert Global G2 TLS RSA SHA256 2020 CA1
SANs: *.extern.facebook.com, extern.facebook.com
Subject: *.extern.facebook.com
Issuer: DigiCert Global G2 TLS RSA SHA256 2020 CA1
SANs: *.extern.facebook.com, extern.facebook.com
Subject: *.extern.facebook.com
Issuer: DigiCert Global G2 TLS RSA SHA256 2020 CA1
SANs: *.extern.facebook.com, extern.facebook.com
Subject: *.extern.facebook.com
Issuer: DigiCert Global G2 TLS RSA SHA256 2020 CA1
SANs: *.extern.facebook.com, extern.facebook.com
Subject: *.extern.facebook.com
Issuer: DigiCert Global G2 TLS RSA SHA256 2020 CA1
SANs: *.extern.facebook.com, extern.facebook.com
Subject: *.extern.facebook.com
Issuer: DigiCert Global G2 TLS RSA SHA256 2020 CA1
SANs: *.extern.facebook.com, extern.facebook.com

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

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
A 57.144.222.146 2026-06-15 06:41:09.100 2026-07-31 03:52:56.144
TXT v=spf1 a ~all 2026-06-15 06:41:09.100 2026-07-31 03:52:56.144
AAAA 2a03:2880:f36f:92:face:b00c:0:7c8d 2026-06-15 06:41:09.100 2026-07-31 03:52:56.144
AAAA 2a03:2880:f03f:9:face:b00c:0:7c8d 2026-06-18 12:33:44.795 2026-07-28 06:41:44.976
A 57.144.244.146 2026-06-18 12:33:44.795 2026-06-20 06:41:46.428
A 157.240.0.8 2026-06-18 17:25:13.955 2026-07-28 06:41:44.976
A 157.240.27.9 2026-06-20 09:43:43.461 2026-06-20 23:18:35.329
AAAA 2a03:2880:f084:108:face:b00c:0:7c8d 2026-06-20 09:43:43.461 2026-07-21 10:45:46.112
AAAA 2a03:2880:f37a:92:face:b00c:0:7c8d 2026-06-20 23:18:35.329 2026-07-26 16:20:59.102
A 157.240.253.18 2026-06-22 11:49:11.854 2026-06-23 03:54:45.080
AAAA 2a03:2880:f083:113:face:b00c:0:7c8d 2026-06-23 11:33:35.645 2026-07-31 03:51:37.464
AAAA 2a03:2880:f028:6:face:b00c:0:7c8d 2026-07-23 06:49:31.740 2026-07-28 16:20:40.086
A 157.240.9.7 2026-07-28 16:20:40.086 2026-07-28 16:20:40.086