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https://m.facebook.com

Infrastructure

· 9 checks — DNS, redirects, IPv6, crawlability, URL variants, and domain intelligence rolled into one auditable list.
SCORE
94
GRADE
A
FIX
2
REVIEW
1
PASS
6
INFO
0
Probed from Singapore, Singapore
200 OK
Checks
9
6 PASS 1 REVIEW 2 FIX
D
TLS Certificate Expiry & Recommendations
Action
8 days until leaf cert expires — 4 issues to address
FIX

Certificate validity

8
days left
0d 30d 60d 90d+
Renew urgently — under 14 days remaining

Recommended actions

  • Renew certificate — 8 days remaining
  • Extend HSTS max-age to at least 31536000 (1 year) to meet the preload list criteria
  • Enable DNSSEC on your domain for DNS spoofing protection
  • Enable OCSP stapling on your TLS server to remove a CA roundtrip and protect user privacy
D
CDN & Delivery
Action
No CDN detected
FIX
No CDN detected
Warning::
No CDN detected
A CDN can significantly improve load times for users around the world by caching content at edge nodes closer to them.
No CDN detected

Consider using a CDN to improve global delivery speed and reduce origin load.

B
DNS Records
1 A records, 22 ms lookup
REVIEW
1 A records, 22 ms lookup
Info::
Resolves to 1 IPv4 address(es)
Got: 57.144.144.1
Info::
Single A record — no DNS redundancy
Multiple A records provide failover if one server goes down.
Info::
Has 1 IPv6 (AAAA) record(s)
Got: 2a03:2880:f35d:1:face:b00c:0:25de
Warning::
CNAME record at zone apex
A CNAME at the zone apex can break MX and NS records. Use ALIAS/ANAME or A records instead.
Got: star-mini.c10r.facebook.com
Info::
No NS records found
Info::
No MX records — email not configured via DNS
Info::
CAA records not checked
CAA record lookup requires a specialized DNS resolver. This check will be available in a future update.
Info::
SPF record present in TXT
Info::
DNS resolution time: 22 ms
Got: 22 ms
A57.144.144.1
AAAA2a03:2880:f35d:1:face:b00c:0:25de
CNAMEstar-mini.c10r.facebook.com
NS—
MX—
TXT
SPF v=spf1 a ~all
CAALookup not available with standard resolver
Resolved in 22 ms

Multiple A records provide failover if one server goes down.

Why this matters

Single A record means a single point of failure — if that IP goes down, your site is unreachable until DNS TTL expires.

Learn more ▾

Add multiple A records for round-robin failover, or use a managed DNS provider with health-checked failover (Route 53, Cloudflare, NS1). Short TTL (60-300s) lets clients recover faster on outages.

Source: SRE practice / DNS architecture

A CNAME at the zone apex can break MX and NS records. Use ALIAS/ANAME or A records instead.

Why this matters

CNAME at the apex (example.com) breaks every other apex record (MX, TXT, NS) — DNS-protocol violation per RFC 1034.

Learn more ▾

RFC 1034 forbids CNAME alongside other records at the same name. Some DNS providers offer ALIAS / ANAME / flattened-CNAME records that work around this — use those instead. Otherwise apex-level CNAME breaks email (no MX), domain ownership verification (no TXT), and more.

Source: RFC 1034

CAA record lookup requires a specialized DNS resolver. This check will be available in a future update.

Why this matters

Informational: CAA (Certification Authority Authorization) records weren't checked in this scan.

A+
Redirect Chain
No redirects — direct access
PASS
No redirects — direct access
Info::
No redirects — direct access
Got: https://m.facebook.com

https://m.facebook.com

300 ms · HTTP/1.1 FINAL

#URLStatusTimeProtocolServer
1https://m.facebook.com200300 msHTTP/1.1
A+
IPv6 Readiness
IPv6 reachable (1 ms)
PASS
IPv6 reachable (1 ms)
Info::
IPv6 is configured and reachable at 2a03:2880:f35d:1:face:b00c:0:25de
Got: 1 ms connect
IPv6 Ready
AAAA Records 2a03:2880:f35d:1:face:b00c:0:25de Connection Reachable (1 ms)
A
Crawlability
robots.txt present, sitemap with 0 URLs
PASS
robots.txt present, sitemap with 0 URLs
Info::
robots.txt is present
Got: 10240 bytes
Info::
sitemap.xml is present
Info::
sitemap.xml is valid XML
Warning::
sitemap.xml is empty — no URLs found
An empty sitemap provides no value. Add <url> entries for your pages.
Info::
robots.txt does not reference a sitemap
Add a 'Sitemap:' directive to robots.txt so search engines can discover your sitemap.

An empty sitemap provides no value. Add <url> entries for your pages.

Why this matters

An empty sitemap signals 'no content to index' to Google — actively harmful versus having no sitemap at all.

Learn more ▾

Google compares URLs in the sitemap against URLs it has crawled. An empty sitemap on a site with thousands of pages signals abandonment. Either populate it correctly (most CMSes auto-generate) or delete the file and let Google crawl normally.

Source: Google Search Central / sitemaps.org

Add a 'Sitemap:' directive to robots.txt so search engines can discover your sitemap.

Why this matters

robots.txt omits Sitemap: directive — crawlers must fetch /sitemap.xml by convention; reliable but missing the explicit hint.

Source: sitemaps.org

robots.txt 200 OK
Size 10240 B Sitemaps referenced 0 User-agents GPTBot, PerplexityBot, PetalBot, viberbot, Yandex, Googlebot-Image, Amazonbot, ClaudeBot, Applebot, Discordbot, Applebot-Extended, Brightbot, uptimerobot, YaK, Bingbot, facebookexternalhit, Googlebot-Video, Googlebot-News, Google-Extended, Scrapy, Yeti, DuckDuckBot, Googlebot, Google-InspectionTool Blocking No — crawling allowed
# Notice: Collection of data on Facebook through automated means is
# prohibited unless you have express written permission from Facebook
# and may only be conducted for the limited purpose contained in said
# permission.
# All authorized user-agents listed on this page must comply with Meta’s
# Automated Data Collection Terms available at:
# https://www.facebook.com/legal/automated_data_collection_terms
User-agent: Amazonbot
Disallow: /

User-agent: Applebot-Extended
Disallow: /

User-agent: Brightbot
Disallow: /

User-agent: ClaudeBot
Disallow: /

User-agent: Google-Extended
Disallow: /

User-agent: GPTBot
Disallow: /

User-agent: PerplexityBot
Disallow: /

User-agent: PetalBot
Disallow: /

User-agent: Scrapy
Disallow: /

User-agent: uptimerobot
Disallow: /

User-agent: viberbot
Disallow: /

User-agent: YaK
Disallow: /

User-agent: Yandex
Disallow: /

User-agent: Yeti
Disallow: /

User-agent: Applebot
Disallow: /*/plugins/*
Disallow: /?*next=
Disallow: /a/bz?
Disallow: /ajax/
Disallow: /album.php
Disallow: /checkpoint/
Disallow: /contact_importer/
Disallow: /dialog/
Disallow: /fbml/ajax/dialog/
Disallow: /feeds/
Disallow: /file_download.php
Disallow: /job_application/
Disallow: /l.php
Disallow: /login.php*&next=
Disallow: /login.php/?next=
Disallow: /login.php?next=
Disallow: /login/*&next=
Disallow: /login/?next=
Disallow: /login/device-based/regular/login/*&next=
Disallow: /login/device-based/regular/login/?next=
Disallow: /meta-ai-answers/
Disallow: /moments_app/
Disallow: /p.php
Disallow: /photos.php
Disallow: /plugins/
Disallow: /share.php
Disallow: /share/
Disallow: /sharer.php
Disallow: /sharer/
Disallow: /tr/
Disallow: /tr?
Disallow: /ufi/reaction/profile/browser/
Disallow: /x/oauth/
Allow: /ajax/bootloader-endpoint/
Allow: /ajax/pagelet/generic.php/PagePostsSectionPagelet
Allow: /careers/
Allow: /safetycheck/

User-agent: Bingbot
Disallow: /*/plugins/*
Disallow: /?*next=
Disallow: /a/bz?
Disallow: /ajax/
Disallow: /album.php
Disallow: /checkpoint/
Disallow: /contact_importer/
Disallow: /dialog/
Disallow: /fbml/ajax/dialog/
Disallow: /feeds/
Disallow: /file_download.php
Disallow: /job_application/
Disallow: /l.php
Disallow: /login.php*&next=
Disallow: /login.php/?next=
Disallow: /login.php?next=
Disallow: /login/*&next=
Disallow: /login/?next=
Disallow: /login/device-based/regular/login/*&next=
Disallow: /login/device-based/regular/login/?next=
Disallow: /meta-ai-answers/
Disallow: /moments_app/
Disallow: /p.php
Disallow: /photos.php
Disallow: /plugins/
Disallow: /share.php
Disallow: /share/
Disallow: /sharer.php
Disallow: /sharer/
Disallow: /tr/
Disallow: /tr?
Disallow: /ufi/reaction/profile/browser/
Disallow: /x/oauth/
Allow: /ajax/bootloader-endpoint/
Allow: /ajax/pagelet/generic.php/PagePostsSectionPagelet
Allow: /careers/
Allow: /safetycheck/

User-agent: Discordbot
Disallow: /*/plugins/*
Disallow: /?*next=
Disallow: /a/bz?
Disallow: /ajax/
Disallow: /album.php
Disallow: /checkpoint/
Disallow: /contact_importer/
Disallow: /dialog/
Disallow: /fbml/ajax/dialog/
Disallow: /feeds/
Disallow: /file_download.php
Disallow: /job_application/
Disallow: /l.php
Disallow: /login.php*&next=
Disallow: /login.php/?next=
Disallow: /login.php?next=
Disallow: /login/*&next=
Disallow: /login/?next=
Disallow: /login/device-based/regular/login/*&next=
Disallow: /login/device-based/regular/login/?next=
Disallow: /meta-ai-answers/
Disallow: /moments_app/
Disallow: /p.php
Disallow: /photos.php
Disallow: /plugins/
Disallow: /share.php
Disallow: /share/
Disallow: /sharer.php
Disallow: /sharer/
Disallow: /tr/
Disallow: /tr?
Disallow: /ufi/reaction/profile/browser/
Disallow: /x/oauth/
Allow: /ajax/bootloader-endpoint/
Allow: /ajax/pagelet/generic.php/PagePostsSectionPagelet
Allow: /careers/
Allow: /safetycheck/

User-agent: DuckDuckBot
Disallow: /*/plugins/*
Disallow: /?*next=
Disallow: /a/bz?
Disallow: /ajax/
Disallow: /album.php
Disallow: /checkpoint/
Disallow: /contact_importer/
Disallow: /dialog/
Disallow: /fbml/ajax/dialog/
Disallow: /feeds/
Disallow: /file_download.php
Disallow: /job_application/
Disallow: /l.php
Disallow: /login.php*&next=
Disallow: /login.php/?next=
Disallow: /login.php?next=
Disallow: /login/*&next=
Disallow: /login/?next=
Disallow: /login/device-based/regular/login/*&next=
Disallow: /login/device-based/regular/login/?next=
Disallow: /meta-ai-answers/
Disallow: /moments_app/
Disallow: /p.php
Disallow: /photos.php
Disallow: /plugins/
Disallow: /share.php
Disallow: /share/
Disallow: /sharer.php
Disallow: /sharer/
Disallow: /tr/
Disallow: /tr?
Disallow: /ufi/reaction/profile/browser/
Disallow: /x/oauth/
Allow: /ajax/bootloader-endpoint/
Allow: /ajax/pagelet/generic.php/PagePostsSectionPagelet
Allow: /careers/
Allow: /safetycheck/

User-agent: facebookexternalhit
Disallow: /*/plugins/*
Disallow: /?*next=
Disallow: /a/bz?
Disallow: /ajax/
Disallow: /album.php
Disallow: /checkpoint/
Disallow: /contact_importer/
Disallow: /dialog/
Disallow: /fbml/ajax/dialog/
Disallow: /feeds/
Disallow: /file_download.php
Disallow: /job_application/
Disallow: /l.php
Disallow: /login.php*&next=
Disallow: /login.php/?next=
Disallow: /login.php?next=
Disallow: /login/*&next=
Disallow: /login/?next=
Disallow: /login/device-based/regular/login/*&next=
Disallow: /login/device-based/regular/login/?next=
Disallow: /meta-ai-answers/
Disallow: /moments_app/
Disallow: /p.php
Disallow: /photos.php
Disallow: /plugins/
Disallow: /share.php
Disallow: /share/
Disallow: /sharer.php
Disallow: /sharer/
Disallow: /tr/
Disallow: /tr?
Disallow: /ufi/reaction/profile/browser/
Disallow: /x/oauth/
Allow: /ajax/bootloader-endpoint/
Allow: /ajax/pagelet/generic.php/PagePostsSectionPagelet
Allow: /careers/
Allow: /safetycheck/

User-agent: Googlebot
Disallow: /*/plugins/*
Disallow: /?*next=
Disallow: /a/bz?
Disallow: /ajax/
Disallow: /album.php
Disallow: /checkpoint/
Disallow: /contact_importer/
Disallow: /dialog/
Disallow: /fbml/ajax/dialog/
Disallow: /feeds/
Disallow: /file_download.php
Disallow: /job_application/
Disallow: /l.php
Disallow: /login.php*&next=
Disallow: /login.php/?next=
Disallow: /login.php?next=
Disallow: /login/*&next=
Disallow: /login/?next=
Disallow: /login/device-based/regular/login/*&next=
Disallow: /login/device-based/regular/login/?next=
Disallow: /meta-ai-answers/
Disallow: /moments_app/
Disallow: /p.php
Disallow: /photos.php
Disallow: /plugins/
Disallow: /share.php
Disallow: /share/
Disallow: /sharer.php
Disallow: /sharer/
Disallow: /tr/
Disallow: /tr?
Disallow: /ufi/reaction/profile/browser/
Disallow: /x/oauth/
Allow: /ajax/bootloader-endpoint/
Allow: /ajax/pagelet/generic.php/PagePostsSectionPagelet
Allow: /careers/
Allow: /safetycheck/

User-agent: Googlebot-Image
Disallow: /*/plugins/*
Disallow: /?*next=
Disallow: /a/bz?
Disallow: /ajax/
Disallow: /album.php
Disallow: /checkpoint/
Disallow: /contact_importer/
Disallow: /dialog/
Disallow: /fbml/ajax/dialog/
Disallow: /feeds/
Disallow: /file_download.php
Disallow: /job_application/
Disallow: /l.php
Disallow: /login.php*&next=
Disallow: /login.php/?next=
Disallow: /login.php?next=
Disallow: /login/*&next=
Disallow: /login/?next=
Disallow: /login/device-based/regular/login/*&next=
Disallow: /login/device-based/regular/login/?next=
Disallow: /map_tile.php
Disallow: /meta-ai-answers/
Disallow: /moments_app/
Disallow: /p.php
Disallow: /photos.php
Disallow: /plugins/
Disallow: /share.php
Disallow: /share/
Disallow: /sharer.php
Disallow: /sharer/
Disallow: /static_map.php
Disallow: /tr/
Disallow: /tr?
Disallow: /ufi/reaction/profile/browser/
Disallow: /x/oauth/
Allow: /ajax/bootloader-endpoint/
Allow: /ajax/pagelet/generic.php/PagePostsSectionPagelet
Allow: /careers/
Allow: /safetycheck/

User-agent: Googlebot-Video
Disallow: /*/plugins/*
Disallow: /?*next=
Disallow: /a/bz?
Disallow: /ajax/
Disallow: /album.php
Disallow: /checkpoint/
Disallow: /contact_importer/
Disallow: /dialog/
Disallow: /fbml/ajax/dialog/
Disallow: /feeds/
Disallow: /file_download.php
Disallow: /job_application/
Disallow: /l.php
Disallow: /login.php*&next=
Disallow: /login.php/?next=
Disallow: /login.php?next=
Disallow: /login/*&next=
Disallow: /login/?next=
Disallow: /login/device-based/regular/login/*&next=
Disallow: /login/device-based/regular/login/?next=
Disallow: /meta-ai-answers/
Disallow: /moments_app/
Disallow: /p.php
Disallow: /photos.php
Disallow: /plugins/
Disallow: /share.php
Disallow: /share/
Disallow: /sharer.php
Disallow: /sharer/
Disallow: /tr/
Disallow: /tr?
Disallow: /ufi/reaction/profile/browser/
Disallow: /x/oauth/
Allow: /ajax/bootloader-endpoint/
Allow: /ajax/pagelet/generic.php/PagePostsSectionPagelet
Allow: /careers/
Allow: /safetycheck/

User-agent: Googlebot-News
Disallow: /*/plugins/*
Disallow: /?*next=
Disallow: /a/bz?
Disallow: /ajax/
Disallow: /album.php
Disallow: /checkpoint/
Disallow: /contact_importer/
Disallow: /dialog/
Disallow: /fbml/ajax/dialog/
Disallow: /feeds/
Disallow: /file_download.php
Disallow: /job_application/
Disallow: /l.php
Disallow: /login.php*&next=
Disallow: /login.php/?next=
Disallow: /login.php?next=
Disallow: /login/*&next=
Disallow: /login/?next=
Disallow: /login/device-based/regular/login/*&next=
Disallow: /login/device-based/regular/login/?next=
Disallow: /meta-ai-answers/
Disallow: /moments_app/
Disallow: /p.php
Disallow: /photos.php
Disallow: /plugins/
Disallow: /share.php
Disallow: /share/
Disallow: /sharer.php
Disallow: /sharer/
Disallow: /tr/
Disallow: /tr?
Disallow: /ufi/reaction/profile/browser/
Disallow: /x/oauth/
Allow: /ajax/bootloader-endpoint/
Allow: /ajax/pagelet/generic.php/PagePostsSectionPagelet
Allow: /careers/
Allow: /safetycheck/

User-agent: Google-InspectionTool
Disallow: /*/plugins/*
Disallow: /?*next=
Disallow: /a/bz?
Disallow: /ajax/
Disallow: /album.php
Disallow: /checkpoint/
Disallow: /contact_importer/
Disallow: /dialog/
Disallow: /fbml/ajax/dialog/
Disallow: /feeds/
Disallow: /file_download.php
Disallow: /job_application/
Disallow: /l.php
Disallow: /login.php*&next=
Disallow: /login.php/?next=
Disallow: /login.php?next=
Disallow: /login/*&next=
Disallow: /login/?next=
Disallow: /login/device-based/regular/login/*&next=
Disallow: /login/device-based/regular/login/?next=
Disallow: /meta-ai-answers/
Disallow: /moments_app/
Disallow: /p.php
Disallow: /photo
sitemap.xml 200 OK
Type URL Set URLs 0 entries Valid XML Yes
A+
URL Variants
www/non-www, trailing slash, HTTP→HTTPS
PASS
www/non-www, trailing slash, HTTP→HTTPS
Info::
HTTP correctly 301-redirects to HTTPS

www / non-www

https://www.m.facebook.com/
200https://m.facebook.com/

HTTP → HTTPS

301http://m.facebook.com/ → https://m.facebook.com/

Consistent

A+
Domain Intelligence
facebook.com — via RegistrarSafe, LLC, 29 years, 5 months old
PASS
facebook.com — via RegistrarSafe, LLC, 29 years, 5 months old
Info::
Domain registered until Mar 30, 2034 (8 years remaining)
Info::
DNSSEC is not enabled
DNSSEC protects against DNS spoofing attacks. While not required, enabling DNSSEC adds an additional layer of security. Contact your DNS provider to enable it.
Info::
Registrar: RegistrarSafe, LLC
Warning::
Registrar lock is NOT enabled
The domain can be transferred without an unlock step. Enable registrar lock (clientTransferProhibited) in your registrar's control panel to protect against unauthorized or accidental transfers.
Domain expiry

2782 days

March 30, 2034

SSL certificate

8 days

Issued by DigiCert Inc

Domain age

29 years, 5 months

Registered March 29, 1997

DNSSEC

Not enabled

Protects against DNS spoofing

Hosting

Unknown

2a03:2880:f350:1:face:b00c:0:25de

Registrar

RegistrarSafe, LLC

Unlocked 4 NS records
Expiry timeline
Today
+1 year
Domain expiry SSL expiry Danger zone (≤30 days)
Recommended actions
  • Renew the TLS certificate or verify auto-renewal is working
  • Enable DNSSEC to protect visitors from DNS spoofing
  • Enable registrar lock (clientTransferProhibited) to block unauthorized domain transfers
Registrar RegistrarSafe, LLC
Created March 29, 1997 (29 years, 5 months ago)
Expires March 30, 2034 (8 years)
Last Updated April 23, 2025
Name Servers a.ns.facebook.com, b.ns.facebook.com, c.ns.facebook.com, d.ns.facebook.com
DNSSEC Not enabled
Hosting
IP Address 2a03:2880:f350:1:face:b00c:0:25de
Data source: rdap (0.6s)

DNSSEC protects against DNS spoofing attacks. While not required, enabling DNSSEC adds an additional layer of security. Contact your DNS provider to enable it.

Why this matters

Without DNSSEC, an attacker who can poison your DNS can hijack your domain — and SSL certs alone don't stop them.

Learn more ▾

DNSSEC adds cryptographic signatures to DNS records, preventing forged responses from poisoning resolver caches. Without it, an attacker who controls the network path can redirect your domain to a malicious server before any HTTPS handshake happens. Most modern registrars (Cloudflare, Google Domains, Route 53) enable it with one toggle.

Source: ICANN / RFC 4033

The domain can be transferred without an unlock step. Enable registrar lock (clientTransferProhibited) in your registrar's control panel to protect against unauthorized or accidental transfers.

Why this matters

Without registrar lock, an attacker who phishes your registrar credentials can transfer the domain in minutes — total brand hijack.

Learn more ▾

Registrar lock (clientTransferProhibited, clientUpdateProhibited, clientDeleteProhibited) requires extra verification before any transfer/update/delete. Every major registrar offers it free. Combined with 2FA on your registrar account, it's the strongest defense against domain hijacking.

Source: ICANN / domain-security best practice

A+
HTTP Probe Timing
Total 264 ms — DNS, TCP, TLS, TTFB, content transfer breakdown
PASS
DNS Lookup DNS Lookup — time to resolve the domain name to an IP address.
3 ms
TCP Connect TCP Connect — time to establish a TCP connection to the server.
1 ms
TLS Handshake TLS Handshake — time to complete the HTTPS encryption handshake.
2 ms
Time to First Byte Time to First Byte — how long the server takes to respond with the first byte of data.
264 ms
Total Time Total request time from DNS lookup through full response.
264 ms

Connection waterfall

DNS Lookup 3 ms TCP Connect 1 ms TLS Handshake 2 ms Server Processing 257 ms Content Transfer 0 ms
All checks on this page are automated. Results are estimates - run targeted manual reviews when the score affects a release decision.

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