Location
Chicago, United States
Within about 20 km
Domain
facebook.com
Hosted by Facebook in Chicago, United States.
Still looking this up. This tab fills in as the answers arrive.
Network Every network on the internet has an autonomous system number (ASN). This is the one that announces this address.
AS32934Facebook, Inc.
BGP prefixPrefix The block of addresses this IP is announced in to the rest of the internet. RPKI valid means the block's owner signed off on the network announcing it.
RPKI valid57.144.204.0/23
Seen by 3,086 peers
Latency Round trip for an HTTPS request from your browser to the site and back, including the server's reply time.
Live— ms
Measuring from your browser…
At a glance
Route
Finding a probe near you…
Networks crossed
Each network is an autonomous system (AS). Your traffic is handed from one to the next where they connect, following
the routes BGP advertises.
- AS16509Anthropic, PBC
- AS32934Facebook
Tracing from a probe near you with Globalping. Hop locations that its round-trip times rule out are left off the map.
DNS records
TypeNameValueTTL
Afacebook.com57.144.204.145 sec
AAAAfacebook.com2a03:2880:f366:1:face:b00c:0:25de1 min
NSfacebook.comd.ns.facebook.com2 days
NSfacebook.coma.ns.facebook.com2 days
NSfacebook.comb.ns.facebook.com2 days
NSfacebook.comc.ns.facebook.com2 days
MXfacebook.com10 smtpin.vvv.facebook.com42 min
TXTfacebook.com"hubspot-developer-verification=MzQ2OTc4NWYtNDNmNS00ZmFlLWE3YTUtMDEwOTllNmEyYWZm"42 min
TXTfacebook.com"google-site-verification=A2WZWCNQHrGV_TWwKh6KHY90tY0SHZo_RnyMJoDaG0s"2 hr
TXTfacebook.com"google-site-verification=wdH5DTJTc9AYNwVunSVFeK0hYDGUIEOGb-RReU6pJlY"2 hr
TXTfacebook.com"facebook-domain-verification=y7isfmi3kzyg1r4wophh9vyb6pgbda"42 min
TXTfacebook.com"zoom-domain-verification=4b2ef4e1-6dee-4483-9869-9bef353fd147"42 min
TXTfacebook.com"zoom-domain-verification=ZOOM_verify_e6c41daeb8a04c56b2c1d1702e312f88"42 min
TXTfacebook.com"google-site-verification=sK6uY9x7eaMoEMfn3OILqwTFYgaNp4llmguKI-C3_iA"2 hr
TXTfacebook.com"v=spf1 redirect=_spf.facebook.com"24 hr
TXT_dmarc.facebook.com"v=DMARC1; p=reject; rua=mailto:a@dmarc.facebookmail.com; pct=100"1 hr
CAAfacebook.com0 issue "digicert.com; account=271b0beda0771d006aa3a6c11b05187d456d6c239b46cb5241196095b09c92af"1 hr
HTTPSfacebook.com2 star-mini.fallback.c10r.facebook.com. alpn=h2,h32 hr
HTTPSfacebook.com1 . alpn=h2,h32 hr
Exposure
Open ports
2 open- 80HTTP
- 443HTTPS
- Seen asHostnames Shodan has seen pointing at, or presented by, this address.
- facebook.comedge-star-mini-shv-01-ord5.facebook.commessenger.com
From Shodan InternetDB, updated weekly.
Protected from spoofing
Mail that fails its checks is rejected under facebook.com's DMARC policy, so forged mail doesn't reach inboxes.
- Receives mail
- Its own servers
- Mail servers
- smtpin.vvv.facebook.com
- SPFLists the servers allowed to send mail for the domain. Receivers check it against the sending server.
- Rejects everything else1 of 10 DNS lookups · includes _spf.facebook.com
- DMARCTells receivers what to do with mail that fails SPF and DKIM: nothing (none), spam folder (quarantine) or reject.
- Rejectsends reports
- MTA-STSRequires other mail servers to use encrypted connections (TLS) when delivering to this domain.
- Testing
- TLS reportsAsks other mail servers to report failed encrypted deliveries (TLS-RPT).
- Requested
- BIMIA brand logo that some mail apps show next to authenticated mail from the domain.
- Not published
Details
Network
- IPv4
- 57.144.204.1
- Reverse DNSThe hostname this address points back to (its PTR record).
- edge-star-mini-shv-01-ord5.facebook.com
- ASNThe autonomous system number of the network that announces this address.
- AS32934
- Operator
- Facebook, Inc.
- PrefixThe block of addresses announced over BGP that contains this address.
- 57.144.204.0/23
- RPKIWhether a signed record (ROA) authorizes this network to announce this prefix.
- Valid
- VisibilityHow many bgp.tools peers carry this announcement.
- 3,086 peers
- Type
- Content
- Registry
- RIPE NCC
Location
- Country
- United States
- Region
- Illinois
- City
- Chicago
- Coordinates
- 41.8483° N, 87.6517° W
- Accuracy
- Within about 20 km
- Time zone
- America/ChicagoUTC-5
- Local time
- 11:04
- Continent
- North America
Registration
RDAP- PopularityCloudflare Radar's ranking of domains by how often 1.1.1.1 users look them up.
- #9 worldwide
- Category
- Social Networks
- Registrar
- RegistrarSafe, LLC
- Registered
- Mar 29, 199729 years ago
- Expires
- Mar 30, 2034in 7 years
- Updated
- Apr 23, 2025
- StatusRegistry flags on the domain, such as locks that stop unauthorized transfers or changes.
- Delete lockedTransfer lockedUpdate lockedDelete locked by registryTransfer locked by registryUpdate locked by registry
- DNSSECDNSSEC signs DNS answers so they can't be forged on the way to you.
- Unsigned
- Name servers
- a.ns.facebook.comb.ns.facebook.comc.ns.facebook.comd.ns.facebook.com
- Registrant
- Redacted for privacy
Mar 29, 19972,726 days leftMar 30, 2034
Website
Page
- Language
- English
Built with
Nothing recognizable in its headers, DNS or markup.
Versions, rendering and outside codeTech stack
Built with Each entry says what gave it away: a response header, a cookie's name, an asset's path or file name, or markup the tool leaves in the page. Versions are checked against endoflife.date's support schedules and, for JavaScript packages, OSV's vulnerability database, which carries GitHub's security advisories.
Nothing recognizable in its headers, cookies or markup.
How it's made
- RenderingPrerendered pages are built ahead of time and served as files. Pages rendered on each request are built by server code for every visitor. Pages drawn in the browser arrive nearly empty and depend on JavaScript, which most AI crawlers don't run. Islands are interactive parts in otherwise static HTML.
- Rendered on each requestCache-Control: private, no-cache, no-store, must-revalidate
- Cache-Control
- private, no-cache, no-store, must-revalidate
- HTML
- 451.5 KB · sent Brotli-compressed
- Data for scriptsData the server writes into the HTML so JavaScript can pick up where the server left off (hydration). Browsers download and parse all of it before the page responds, so large payloads slow pages down, even when the page looks ready.
- Other JSON 275.6 KB · 61% of the HTML
- Scripts
- 0 files · 49 inline
Code from other sites Scripts a page loads from another domain run with the same power as its own code: they can read what visitors type and change the page. heade.rs checks what the HTML loads, not what tag managers add once they run.
The HTML loads no scripts from other sites.
AI & agents
Kept out of ChatGPT search, Claude, Copilot and Meta AI
robots.txt blocks OAI-SearchBot, Claude-SearchBot and Meta-WebIndexer, and the front page tells bingbot “noarchive”. Perplexity, AI Overviews and Siri can still cite it.
Crawlers
Blocks 16 of 25TrainingSearchOn request
They visit a page when someone asks an assistant about it. ChatGPT's, Perplexity's, Meta's and Amazon's treat robots.txt as advisory;
Anthropic's and Mistral's follow it.
OpenAIGPTBotallowedOAI-SearchBotblockedChatGPT-Userblocked
AnthropicClaudeBotallowedClaude-SearchBotblockedClaude-Userblocked
GoogleGoogle-ExtendedallowedGooglebotallowed—
Microsoft—bingbotallowed—
AppleApplebot-ExtendedallowedApplebotallowed—
Perplexity—PerplexityBotallowedPerplexity-Userblocked
MetaMeta-ExternalAgentblockedMeta-WebIndexerblockedMeta-ExternalFetcherblocked
AmazonAmazonbotallowedAmzn-SearchBotblockedAmzn-Userblocked
MistralMistralAI-TrainingblockedMistralAI-IndexblockedMistralAI-Userblocked
OthersCCBotblockedBytespiderblockedDuckAssistBotblocked
- Can cite itThe AI products that can use the site in their answers: each answers from one crawler (OAI-SearchBot for ChatGPT search, Googlebot for AI Overviews, bingbot for Copilot), and robots directives on the front page, like noindex, nosnippet and noarchive, keep some out.
- PerplexityAI OverviewsGeminiSiri
- Kept out of
- ChatGPT search: robots.txt blocks OAI-SearchBotClaude: robots.txt blocks Claude-SearchBotCopilot: The front page tells bingbot “noarchive”Meta AI: robots.txt blocks Meta-WebIndexer
Front page
Directives in the front page's robots meta tags or X-Robots-Tag header. noindex keeps it out of search, nosnippet out of Google's AI Overviews and
Siri's answers, and noarchive out of Copilot's.
bingbot: noarchive
Reading
- Without JavaScriptText on the front page before any scripts run: what GPTBot, ClaudeBot, PerplexityBot and most agents read. Google, Bing and Apple's crawlers run scripts.
- 80 words
- MarkdownAgents like Claude Code, Cursor and OpenCode ask for Markdown in their Accept header. It's the page without its markup, so it costs them far fewer tokens.
- Not offered
- llms.txtA Markdown file listing a site's key pages for AI tools. Coding agents read it; search crawlers mostly don't.
- Not published
- Structured dataschema.org JSON-LD in the page: facts about the site in a form machines read directly.
- None on the front page
Tools Ways an AI agent can do things on the site, not just read it: an MCP server that apps like Claude, ChatGPT and Cursor connect to, an API catalog, packaged agent skills, a shopping profile (UCP), or tools the page offers AI in the browser (WebMCP). heade.rs looks in the official MCP Registry and the files the site publishes under /.well-known/.
No MCP server, API catalog, agent skills, shopping profile or in-page tools found.
HTTPS
Certificate
Valid- Issuer
- DigiCert
- Issuing CA
- DigiCert Global G2 TLS RSA SHA256 2020 CA1
- Covers
*.facebook.com, *.facebook.net, *.fbcdn.net +8 more
*.fbsbx.com, *.m.facebook.com, *.messenger.com, *.xx.fbcdn.net, *.xy.fbcdn.net, *.xz.fbcdn.net, facebook.com, messenger.com- Also validOther unexpired certificates for this name, found in Certificate Transparency logs.
- 99 more certificates
Aug 31, 202649 days leftNov 29, 2026
From Certificate Transparency logs, via Cert Spotter.
Security
A- HSTSStrict-Transport-Security makes browsers refuse plain HTTP to this site. Preloaded sites are HTTPS-only even on a first visit.
- 6 monthsPreloaded in browsers
- HTTP → HTTPSWhether the plain http:// address redirects visitors to the secure one.
- Redirects
- HTTP/3The newest HTTP, over QUIC. Announced in the alt-svc header or the domain's HTTPS DNS record.
- Available
- Encrypted helloEncrypted Client Hello (ECH) hides which site you're visiting from anyone watching the connection.
- Not published
- CAADNS records naming the only certificate authorities allowed to issue certificates for the domain.
- DigiCert
- security.txtA standard file (RFC 9116) telling security researchers how to report vulnerabilities.
- https://www.facebook.com/whitehat/report/
Security headers 6 of 7
- HSTSpresent
- CSPpresent
- Framingpresent
- No sniffingpresent
- Referrermissing
- Permissionspresent
- Isolationpresent
Response
200 OK694 ms from CMHDNS lookup40 ms
301 facebook.com172 ms
200 www.facebook.com694 ms
DNSConnect (TCP + TLS)Waiting for the replyFrom Cloudflare's CMH data center
Response headers
- vary
- Accept-Encoding
- content-encoding
- br
- set-cookie
- fr=0MACgtKOQJ2Sx9yLM..BqzQT8..AAA.0.0.BqzQT8.AWd6-lYDHggJAoFL4YYwH5eshsg; expires=Sun, 10-Jan-2027 16:04:12 GMT; Max-Age=7776000; path=/; domain=.facebook.com; secure; httponly
- set-cookie
- sb=_ATNaj-IuNLF6lhSVyBoMB-y; expires=Tue, 16-Nov-2027 16:04:12 GMT; Max-Age=34560000; path=/; domain=.facebook.com; secure; httponly
- accept-ch-lifetime
- 4838400
- accept-ch
- viewport-width,dpr,Sec-CH-Prefers-Color-Scheme,Sec-CH-UA-Full-Version-List,Sec-CH-UA-Platform-Version,Sec-CH-UA-Model
- reporting-endpoints
coop_report="https://www.facebook.com/browser_reporting/coop/?minimize=0", default="https://www.facebook.com/ajax/browser_error_reports/?device_level=unknown&brsid=7695812819626571756&cpp=C2&cv=1050037037&st=1791821052815", permissions_poli… Show all
coop_report="https://www.facebook.com/browser_reporting/coop/?minimize=0", default="https://www.facebook.com/ajax/browser_error_reports/?device_level=unknown&brsid=7695812819626571756&cpp=C2&cv=1050037037&st=1791821052815", permissions_policy="https://www.facebook.com/ajax/browser_error_reports/"- report-to
{"max_age":2592000,"endpoints":[{"url":"https:\/\/www.facebook.com\/browser_reporting\/coop\/?minimize=0"}],"group":"coop_report","include_subdomains":true}, {"max_age":259200,"endpoints":[{"url":"https:\/\/www.facebook.com\/ajax\/browser_e… Show all
{"max_age":2592000,"endpoints":[{"url":"https:\/\/www.facebook.com\/browser_reporting\/coop\/?minimize=0"}],"group":"coop_report","include_subdomains":true}, {"max_age":259200,"endpoints":[{"url":"https:\/\/www.facebook.com\/ajax\/browser_error_reports\/?device_level=unknown&brsid=7695812819626571756&cpp=C2&cv=1050037037&st=1791821052815"}]}, {"max_age":21600,"endpoints":[{"url":"https:\/\/www.facebook.com\/ajax\/browser_error_reports\/"}],"group":"permissions_policy"}- content-security-policy
default-src blob: 'self' https://*.fbsbx.com *.facebook.com *.fbcdn.net *.facebook.net *.whatsapp.com *.whatsapp.net;script-src *.facebook.com *.fbcdn.net *.facebook.net 127.0.0.1:* 'nonce-vSf4IRmi' blob: 'self' connect.facebook.net 'unsafe… Show all
default-src blob: 'self' https://*.fbsbx.com *.facebook.com *.fbcdn.net *.facebook.net *.whatsapp.com *.whatsapp.net;script-src *.facebook.com *.fbcdn.net *.facebook.net 127.0.0.1:* 'nonce-vSf4IRmi' blob: 'self' connect.facebook.net 'unsafe-eval' https://accounts.google.com https://*.google-analytics.com *.google.com;style-src *.fbcdn.net data: *.facebook.com 'unsafe-inline' https://accounts.google.com https://fonts.googleapis.com;connect-src *.facebook.com facebook.com *.fbcdn.net *.facebook.net wss://*.facebook.com:* wss://*.whatsapp.com:* wss://*.fbcdn.net attachment.fbsbx.com ws://localhost:* blob: *.cdninstagram.com 'self' http://localhost:3103 wss://gateway.facebook.com wss://edge-chat.facebook.com wss://snaptu-d.facebook.com wss://kaios-d.facebook.com/ v.whatsapp.net *.fbsbx.com *.fb.com *.instagram.com *.ipification.com https://accounts.google.com https://*.google-analytics.com;font-src data: *.facebook.com *.fbcdn.net *.fbsbx.com https://fonts.gstatic.com;img-src *.fbcdn.net *.facebook.com data: https://*.fbsbx.com facebook.com *.cdninstagram.com fbsbx.com fbcdn.net connect.facebook.net blob: android-webview-video-poster: *.whatsapp.net *.fb.com *.oculuscdn.com *.tenor.co *.tenor.com *.giphy.com https://trustly.one/ https://*.trustly.one/ https://paywithmybank.com/ https://*.paywithmybank.com/ https://www.googleadservices.com https://googleads.g.doubleclick.net https://*.google-analytics.com;media-src *.cdninstagram.com blob: *.fbcdn.net *.fbsbx.com www.facebook.com *.facebook.com data: *.tenor.co *.tenor.com https://*.giphy.com;child-src data: blob: 'self' https://*.fbsbx.com *.facebook.com *.fbcdn.net;frame-src *.facebook.com *.fbsbx.com fbsbx.com data: www.instagram.com *.fbcdn.net accounts.meta.com *.accounts.meta.com *.fbthirdpartypixel.com *.ipification.com https://trustly.one/ https://*.trustly.one/ https://paywithmybank.com/ https://*.paywithmybank.com/ https://www.googleadservices.com https://googleads.g.doubleclick.net https://www.google.com https://td.doubleclick.net *.google.com *.doubleclick.net;manifest-src data: blob: 'self' https://*.fbsbx.com *.facebook.com *.fbcdn.net;object-src data: blob: 'self' https://*.fbsbx.com *.facebook.com *.fbcdn.net;worker-src blob: *.facebook.com data:;block-all-mixed-content;upgrade-insecure-requests;- x-frame-options
- DENY
- document-policy
- force-load-at-top
- document-policy
- include-js-call-stacks-in-crash-reports
- permissions-policy
accelerometer=(), attribution-reporting=(self), autoplay=(), bluetooth=(), browsing-topics=(self), camera=(self "https://www.fbsbx.com"), ch-device-memory=(), ch-downlink=(), ch-dpr=(), ch-ect=(), ch-rtt=(), ch-save-data=(), ch-ua-arch=(), … Show all
accelerometer=(), attribution-reporting=(self), autoplay=(), bluetooth=(), browsing-topics=(self), camera=(self "https://www.fbsbx.com"), ch-device-memory=(), ch-downlink=(), ch-dpr=(), ch-ect=(), ch-rtt=(), ch-save-data=(), ch-ua-arch=(), ch-ua-bitness=(), ch-viewport-height=(), ch-viewport-width=(), ch-width=(), clipboard-read=(self), clipboard-write=(self), compute-pressure=(), display-capture=(self), encrypted-media=(self), fullscreen=(self), gamepad=*, geolocation=(self), gyroscope=(), hid=(), idle-detection=(), interest-cohort=(self), keyboard-map=(), local-fonts=(), magnetometer=(), microphone=(self), midi=(), otp-credentials=(), payment=(), picture-in-picture=(self), private-state-token-issuance=(), publickey-credentials-get=(self), screen-wake-lock=(), serial=(), shared-storage=(), shared-storage-select-url=(), private-state-token-redemption=(), usb=(), unload=(self), window-management=(), xr-spatial-tracking=(self);report-to="permissions_policy"- cross-origin-resource-policy
- same-origin
- cross-origin-opener-policy
- unsafe-none
- pragma
- no-cache
- cache-control
- private, no-cache, no-store, must-revalidate
- expires
- Sat, 01 Jan 2000 00:00:00 GMT
- x-content-type-options
- nosniff
- x-xss-protection
- 0
- origin-agent-cluster
- ?1
- strict-transport-security
- max-age=15552000; preload
- content-type
- text/html; charset="utf-8"
- x-fb-debug
- zwxCHnWggeTWF0UhgeYrDm1H0M7JMcHjM/Z40moEptAlIceJhKsMHAQymfdS8WR4iTy5KQhCtMSRClgAflRX8Q==
- date
- Mon, 12 Oct 2026 16:04:12 GMT
- x-fb-connection-quality
- EXCELLENT; q=0.9, rtt=15, rtx=0, c=10, mss=1348, tbw=4536, tp=-1, tpl=-1, uplat=76, ullat=0
- alt-svc
- h3=":443"; ma=86400
- server-timing
- slb_crtt;dur=15,slb_srtt;dur=-1,slb_req_start;dur=1791821052793923,slb_srv_hdr_rcvd;dur=76897,slb_cli_body_rcvd_first;dur=-1,slb_cli_body_rcvd_last;dur=-1,slb_conn_lat;dur=0,slb_ssl;dur=7,slb_rule_lat;dur=0
- transfer-encoding
- chunked
- connection
- close