Check-Host.cc

Domain

fb.com

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

Run a live full scan of fb.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
A/AAAA targets
Subdomains
CT + scan + body
Record Types
seen in DNS
Observed Certs
in our scans

DNS Records

A
157.240.0.35, 157.240.17.35, 157.240.253.35, 157.240.27.35, 157.240.9.35, 163.70.128.35, 185.60.219.35, 31.13.72.36
AAAA
2a03:2880:f128:83:face:b00c:0:25de, 2a03:2880:f13f:83:face:b00c:0:25de, 2a03:2880:f176:181:face:b00c:0:25de, 2a03:2880:f177:185:face:b00c:0:25de, 2a03:2880:f17b:88:face:b00c:0:25de, 2a03:2880:f36f:1:face:b00c:0:25de, 2a03:2880:f37a:1:face:b00c:0:25de, 2a03:2880:f37c:1:face:b00c:0:25de
MX
10 mxa-00082601.gslb.pphosted.com, 10 mxb-00082601.gslb.pphosted.com
NS
a.ns.facebook.com, b.ns.facebook.com, c.ns.facebook.com, d.ns.facebook.com
TXT
586957ce-d11e-4efa-9fe5-a887498bf838, G3X1k1XGYGra1nUpTv7Rdk2wAEFHfkKIr9/4/6+Nu67Ks9cR8xaiqAZPPhis9lGD6mb/+9vygIr4QKXIpxIc7w==, I2B7AuxY6G1G_NeiaHF-9A0zn-3NDBnlOBi4zItNCU8, MS=ms56927146, atlassian-domain-verification=I7HLjLnlhJiDT58wzrru2Pd/2cRWa3AKlgCjDPOO43GMP7H0QuafH6eBts3D1GaP, docusign=ad7f789d-eff1-4283-9d90-fdc9484527e1, google-site-verification=Dsycvk_Ky3uQjdvuPrI_Z6A98lWghNTntdS4LuATOj8, mentimeter-16bdc82d-93be-47de-a6d4-fd6adb17c403
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
fb.com 2026-07-28 15:14:01.364
www.fb.com 2026-07-28 04:49:52.055
phabricatorfiles.internmc.fb.com 2026-07-28 09:13:54.986
newsroom.fb.com 2026-06-23 16:39:02.139
phabricatorfiles.intern.fb.com 2026-07-26 23:16:40.732
phabricator.internmc.fb.com 2026-07-28 09:13:54.986
phabricatorfiles.cstools.fb.com 2026-07-26 23:16:40.732
phabricator.cstools.fb.com 2026-07-26 23:16:40.732
phabricator.intern.fb.com 2026-07-26 23:16:40.732
h.fb.com 2026-07-24 14:29:57.609
research.fb.com 2026-05-27 16:39:03.284
transparency.fb.com 2026-05-27 00:08:10.042
instantarticles.fb.com 2026-07-22 18:38:07.226
about.fb.com 2026-06-23 23:10:44.389
engineering.fb.com 2026-05-27 01:25:50.658
opensource.fb.com 2026-07-23 17:19:18.601
www.opensource.fb.com 2026-07-23 17:19:18.601
appstore.fb.com
1970-01-01 00:00:00.000
autodiscover.fb.com
1970-01-01 00:00:00.000
bloodhound.outpost.fb.com
1970-01-01 00:00:00.000
covid-survey.dataforgood.fb.com
1970-01-01 00:00:00.000
dev.cloud.fb.com
1970-01-01 00:00:00.000
dev.us-west-2.vdi.fb.com
1970-01-01 00:00:00.000
email.frlstudies.fb.com
1970-01-01 00:00:00.000
enterpriseenrollment.fb.com
1970-01-01 00:00:00.000
hi5.fb.com
1970-01-01 00:00:00.000
humanrights.fb.com
1970-01-01 00:00:00.000
investor.fb.com
1970-01-01 00:00:00.000
prod.ap-south-1.vdi.fb.com
1970-01-01 00:00:00.000
prod.ap-southeast-1.vdi.fb.com
1970-01-01 00:00:00.000
prod.ap-southeast-3.vdi.fb.com
1970-01-01 00:00:00.000
prod.eu-west-1.vdi.fb.com
1970-01-01 00:00:00.000
prod.eu-west-2.vdi.fb.com
1970-01-01 00:00:00.000
prod.sa-east-1.vdi.fb.com
1970-01-01 00:00:00.000
prod.us-east-1.vdi.fb.com
1970-01-01 00:00:00.000
prod.us-east-2.vdi.fb.com
1970-01-01 00:00:00.000
prod.us-west-2.vdi.fb.com
1970-01-01 00:00:00.000
soydigital.fb.com
1970-01-01 00:00:00.000
soydigitalco.fb.com
1970-01-01 00:00:00.000
soydigitalcr.fb.com
1970-01-01 00:00:00.000
soydigitalmx.fb.com
1970-01-01 00:00:00.000
status.fb.com
1970-01-01 00:00:00.000
supernova.fb.com
1970-01-01 00:00:00.000
vault.code42.fb.com
1970-01-01 00:00:00.000
vdi.fb.com
1970-01-01 00:00:00.000
vsp.fb.com
1970-01-01 00:00:00.000
wethinkdigital.fb.com
1970-01-01 00:00:00.000
www.about.fb.com
1970-01-01 00:00:00.000
www.engineering.fb.com
1970-01-01 00:00:00.000
www.humanrights.fb.com
1970-01-01 00:00:00.000
www.phabricator.internmc.fb.com
1970-01-01 00:00:00.000
www.phabricatorfiles.internmc.fb.com
1970-01-01 00:00:00.000
www.soydigital.fb.com
1970-01-01 00:00:00.000
www.soydigitalco.fb.com
1970-01-01 00:00:00.000
www.soydigitalcr.fb.com
1970-01-01 00:00:00.000
www.soydigitalmx.fb.com
1970-01-01 00:00:00.000
www.wethinkdigital.fb.com
1970-01-01 00:00:00.000
wwww.fb.com
1970-01-01 00:00:00.000

Tech Stack

Tech detection pending

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

TLS Certificates

Subject: *.kpsfb.com
Issuer: R12
SANs: *.kpsfb.com, kpsfb.com
Subject: *.afafb.com
Issuer: GeoTrust TLS RSA CA G1
SANs: *.afafb.com, afafb.com
Subject: mailserver.vlaofb.com
Issuer: YE2
SANs: mailserver.vlaofb.com
Subject: *.afafb.com
Issuer: GeoTrust TLS RSA CA G1
SANs: *.afafb.com, afafb.com
Subject: hoangclonefb.com
Issuer: YR1
SANs: hoangclonefb.com, www.hoangclonefb.com
Subject: yk.yinhufb.com
Issuer: R13
SANs: yk.yinhufb.com
Subject: www.0451pfb.com
Issuer: E8
SANs: 0451pfb.com, m.0451pfb.com, wap.0451pfb.com, www.0451pfb.com
Subject: yolafb.com
Issuer: WE1
SANs: *.yolafb.com, yolafb.com
Subject: *.fb.com
Issuer: DigiCert Global G2 TLS RSA SHA256 2020 CA1
SANs: *.fb.com, fb.com
Subject: www.0451pfb.com
Issuer: E8
SANs: 0451pfb.com, m.0451pfb.com, wap.0451pfb.com, www.0451pfb.com
Subject: *.fb.com
Issuer: DigiCert Global G2 TLS RSA SHA256 2020 CA1
SANs: *.fb.com, fb.com
Subject: yk.yinhufb.com
Issuer: R13
SANs: yk.yinhufb.com
Subject: *.fb.com
Issuer: DigiCert Global G2 TLS RSA SHA256 2020 CA1
SANs: *.fb.com, fb.com
Subject: www.100tfb.com
Issuer: Encryption Everywhere DV TLS CA - G2
SANs: 100tfb.com, www.100tfb.com
Subject: yk.yinhufb.com
Issuer: R13
SANs: yk.yinhufb.com
Subject: *.indulgemfb.com
Issuer: ZeroSSL RSA DV SSL CA 2
SANs: *.indulgemfb.com, indulgemfb.com
Subject: mail.gmailfb.com
Issuer: YR1
SANs: mail.gmailfb.com
Subject: *.internalfb.com
Issuer: DigiCert Global G2 TLS RSA SHA256 2020 CA1
SANs: *.internalfb.com, internalfb.com
Subject: *.fb.com
Issuer: DigiCert Global G2 TLS RSA SHA256 2020 CA1
SANs: *.fb.com, fb.com
Subject: applecn.fujifilm-fb.com.cn
Issuer: SGPAPHQ-INTCA02
SANs: CHN-MSVPN01, CHN-MSVPN01.dc01.fujixerox.net, CHN-MSVPN02, CHN-MSVPN02.dc01.fujixerox.net, applecn.fujifilm-fb.com.cn
Subject: *.fb.com
Issuer: DigiCert Global G2 TLS RSA SHA256 2020 CA1
SANs: *.fb.com, fb.com
Subject: *.fb.com
Issuer: DigiCert Global G2 TLS RSA SHA256 2020 CA1
SANs: *.fb.com, fb.com
Subject: admin.maowangfb.com
Issuer: YE2
SANs: admin.maowangfb.com, api.maowangfb.com
Subject: tran.518fb.com
Issuer: TWCA Secure SSL Certification Authority
SANs: tran.518fb.com
Subject: doc.research-and-analytics.csfb.com
Issuer: GeoTrust TLS RSA CA G1
SANs: doc.research-and-analytics.csfb.com, doc.researchandanalytics-stg.credit-suisse.com, edge-qa-static.credit-suisse.com, edge-static.credit-suisse.com, holt-doc.credit-suisse.com, holt-uat-doc.credit-suisse.com, locus-qa-static.credit-suisse.com, locus-static.credit-suisse.com, plus-beta-static.credit-suisse.com, plus-static.credit-suisse.com, plus-uat-static.credit-suisse.com, research-beta-doc.credit-suisse.com, research-doc.credit-suisse.com, research-qa-doc.credit-suisse.com, research-uat-doc.credit-suisse.com, research-uit-doc.credit-suisse.com
Subject: *.fb.com
Issuer: DigiCert Global G2 TLS RSA SHA256 2020 CA1
SANs: *.fb.com, fb.com
Subject: *.hfcfb.com
Issuer: Xcc Trust OV SSL CA
SANs: *.hfcfb.com, hfcfb.com
Subject: *.internalfb.com
Issuer: DigiCert Global G2 TLS RSA SHA256 2020 CA1
SANs: *.internalfb.com, internalfb.com
Subject: *.absolutefb.com
Issuer: R3
SANs: *.absolutefb.com, absolutefb.com
Subject: accinsfb.com
Issuer: YR1
SANs: accinsfb.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
MX 10 mxb-00082601.gslb.pphosted.com 2026-05-25 23:59:40.866 2026-07-28 15:14:01.364
TXT MS=ms56927146 2026-05-25 23:59:40.866 2026-07-28 15:14:01.364
TXT smartsheet-site-validation=sB5xgx-1nsnQCgORYUhnyDG3Jr739OxJ 2026-05-25 23:59:40.866 2026-07-28 15:14:01.364
TXT mentimeter-16bdc82d-93be-47de-a6d4-fd6adb17c403 2026-05-25 23:59:40.866 2026-07-28 15:14:01.364
TXT atlassian-domain-verification=I7HLjLnlhJiDT58wzrru2Pd/2cRWa3AKlgCjDPOO43GMP7H0QuafH6eBts3D1GaP 2026-05-25 23:59:40.866 2026-07-28 15:14:01.364
TXT G3X1k1XGYGra1nUpTv7Rdk2wAEFHfkKIr9/4/6+Nu67Ks9cR8xaiqAZPPhis9lGD6mb/+9vygIr4QKXIpxIc7w== 2026-05-25 23:59:40.866 2026-07-28 15:14:01.364
NS c.ns.facebook.com 2026-05-25 23:59:40.866 2026-07-28 15:14:01.364
NS a.ns.facebook.com 2026-05-25 23:59:40.866 2026-07-28 15:14:01.364
TXT docusign=ad7f789d-eff1-4283-9d90-fdc9484527e1 2026-05-25 23:59:40.866 2026-07-28 15:14:01.364
TXT parkable-domain-verification=N89SxXel0S4pUXDFVpckFmXIO9MUvN4Or0bO_Lcb8Os= 2026-05-25 23:59:40.866 2026-07-28 15:14:01.364
TXT I2B7AuxY6G1G_NeiaHF-9A0zn-3NDBnlOBi4zItNCU8 2026-05-25 23:59:40.866 2026-07-28 15:14:01.364
TXT mentimeter-8599dcd1-e0da-4326-882e-7570e7c942fb 2026-05-25 23:59:40.866 2026-07-28 15:14:01.364
NS b.ns.facebook.com 2026-05-25 23:59:40.866 2026-07-28 15:14:01.364
TXT 586957ce-d11e-4efa-9fe5-a887498bf838 2026-05-25 23:59:40.866 2026-07-28 15:14:01.364
MX 10 mxa-00082601.gslb.pphosted.com 2026-05-25 23:59:40.866 2026-07-28 15:14:01.364
AAAA 2a03:2880:f13f:83:face:b00c:0:25de 2026-05-25 23:59:40.866 2026-07-27 07:19:40.268
TXT v=spf1 redirect=_spf.fb.com 2026-05-25 23:59:40.866 2026-07-28 15:14:01.364
NS d.ns.facebook.com 2026-05-25 23:59:40.866 2026-07-28 15:14:01.364
A 57.144.248.1 2026-05-25 23:59:40.866 2026-07-27 07:10:58.083
TXT smartsheet-site-validation=r-TtxwzdAh2KN_Zi6mTLGu02fz-9vQU4 2026-05-25 23:59:40.866 2026-07-28 15:14:01.364
TXT google-site-verification=Dsycvk_Ky3uQjdvuPrI_Z6A98lWghNTntdS4LuATOj8 2026-05-25 23:59:40.866 2026-07-28 15:14:01.364
AAAA 2a03:2880:f176:181:face:b00c:0:25de 2026-05-26 00:17:38.499 2026-06-23 16:27:42.962
A 157.240.27.35 2026-05-26 00:17:38.499 2026-06-23 00:10:24.365
AAAA 2a03:2880:f177:185:face:b00c:0:25de 2026-05-26 02:22:42.939 2026-07-21 08:54:38.970
A 157.240.0.35 2026-05-26 02:22:42.939 2026-07-22 16:02:14.572
AAAA 2a03:2880:f37c:1:face:b00c:0:25de 2026-05-26 02:43:02.200 2026-06-20 21:44:31.590
A 57.144.244.1 2026-05-26 05:30:55.049 2026-06-21 23:04:07.065
AAAA 2a03:2880:f37a:1:face:b00c:0:25de 2026-05-26 05:30:55.049 2026-06-23 19:36:31.899
A 157.240.253.35 2026-05-26 12:19:08.814 2026-07-28 13:59:46.480
A 57.144.222.1 2026-05-27 21:25:40.742 2026-07-28 15:14:01.364
AAAA 2a03:2880:f36f:1:face:b00c:0:25de 2026-05-27 21:40:03.298 2026-07-28 15:14:01.364
A 163.70.128.35 2026-05-27 22:57:40.715 2026-05-27 22:57:40.715
AAAA 2a03:2880:f17b:88:face:b00c:0:25de 2026-05-27 22:59:40.747 2026-05-27 23:21:40.736
A 185.60.219.35 2026-05-27 22:59:40.747 2026-05-27 23:37:41.595
A 57.144.62.1 2026-06-16 22:20:06.331 2026-06-16 22:20:06.331
A 31.13.72.36 2026-06-20 14:28:53.389 2026-06-20 14:28:53.389
A 157.240.9.35 2026-07-16 23:06:50.819 2026-07-26 06:49:47.584
A 31.13.84.36 2026-07-21 08:19:27.465 2026-07-21 08:19:27.465
AAAA 2a03:2880:f128:83:face:b00c:0:25de 2026-07-22 08:01:46.002 2026-07-27 20:43:03.212
A 157.240.17.35 2026-07-25 15:14:04.371 2026-07-25 15:14:04.371