🌐
loc.gov 200
🔒 SSL Valid
✨ About this site
This is the official website of the Library of Congress, serving as the research library of the United States Congress and the de facto national library. It is a widely used, highly established institution providing public access to an extensive collection of historical documents, maps, and books, as well as housing the U.S. Copyright Office.
📊 What the data says
The website is currently accessible and utilizes a technology stack including Cloudflare, Font Awesome, and jQuery. It is secured with HSTS, CSP, and X-Frame-Options, while the SSL certificate remains valid until January 15, 2027.
HTTP Status A three-digit code showing if the site loaded successfully (200), redirects (301/302), or has errors (4xx/5xx).Read more →
200
SSL Expires When the SSL certificate expires. An expired certificate causes browser security warnings.Read more →
in 88d
Domain Expires When the domain registration expires. If not renewed, the domain becomes available to others.Read more →
in 256d
Hosting The company and location where this website's server is physically located.Read more →
Unknown
Security Score based on key HTTP security headers: HSTS, Content-Security-Policy, and X-Frame-Options.Read more →
3/3
IP Address The numerical address of the server hosting this website. Reveals location, provider, and network.Read more →
104.17.6.58
Performance Lighthouse performance score from Google PageSpeed Insights (0–100). Measures real-world loading speed, interactivity and visual stability.
N/A
Uptime
100%
Performance Lighthouse performance score from Google PageSpeed Insights (0–100). Measures real-world loading speed, interactivity and visual stability.
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Performance data not available yet.
Tech Stack Technologies detected on this website: CMS, frameworks, libraries, CDN, and analytics tools. 3
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🌐 CDN
Cloudflare
🔤 Font/Icon
Font Awesome
📦 JS Library
jQuery 1.8.2.
Screenshot
Processing...
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⏳
Screenshot is being captured...
DNS Records DNS translates domain names to IP addresses. Records control where the site, email, and services are directed.Read more →
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| A (IPv4) | 104.18.64.82104.17.6.58 |
| AAAA (IPv6) | 2606:4700::6812:40522606:4700::6811:63a |
| NS | alice.ns.cloudflare.comkevin.ns.cloudflare.com |
| MX | 10 mxb-00026101.gslb.gpphosted.com10 mxa-00026101.gslb.gpphosted.com |
| TXT (14) |
Services configured via TXT:
Google3
Adobe
Atlassian
Microsoft 365
OpenAI
+6 other TXT record(s)
Show all TXT recordsv=spf1 include:spf1.loc.gov include:spf2.loc.gov include:spf-00026101.gpphosted.com mx -all webexdomainverification.NQCL=b1bef083-e011-4dcf-b1f7-42204b82128e yTrNm8yrlLjz94UZ1A2UUPz7Gv5UfCIypoGH1HmXjNs= 538fe1481176c669d55eb1a37227bd0a3ccfb28d6a2838429e59f504dc3070d3 62QSYa/kfNXdxXnLjT9/ZOyvqed/KSL3dFy+b7K7EFS08xeEY8vGX0IT9BCOCvkgLa16BcrmaQhTgKeOMK6njA== MS=ms90737861 ZA=NzrYbQCQ4geLYL//TYHmJA== adobe-idp-site-verification=02f02861-90f5-4cf5-9922-c67c80a7bf26 atlassian-domain-verification=nWInaz9qwixZxg4Ef5K7jmsSKDAlta15azD9kOFROWwn8xjciPtK3MK4SUFB1R1/ e9af54f5-6e02-4c11-84a3-ab9d25e7b454 google-site-verification=60lAEjrt1Mhjzxp92lROrlGsYFR9alVBZVncUMaus7Q google-site-verification=D5cqNFQ7z5rT2z4OXeYRmxrMc80omDUqEGtsNFY9N_g google-site-verification=o0tsBc2NuJSImRS3MromAcC8lwoaWNp5LFZlmJXB0-0 openai-domain-verification=dv-30BwSHGyfCP4Av8FZs9IAyOJ |
WHOIS / RDAP Public registration data: who registered the domain, when, and when it expires.Read more →
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| Registrar | get.gov |
| Registered | 1997-10-02 |
| Expires | 2027-07-07 (in 256 days) |
| Last Updated | 2026-08-14 |
| Status | server transfer prohibited |
SSL Certificate Encrypts the connection between browsers and this website. Valid SSL = HTTPS works.Read more → Valid
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| Subject (CN) | loc.gov |
| Issuer | Google Trust Services |
| Valid From | 2026-10-22 |
| Valid Until | 2027-01-20 (88 days left) |
| SANs (3) | loc.gov*.loc.gov*.le.loc.gov |
HTTP Headers Metadata sent by the server: reveals software, caching rules, and security configuration.Read more →
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| Status | 200 |
| Server | cloudflare |
| Content-Type | text/html |
| Final URL | https://www.loc.gov/ |
| strict-transport-security | max-age=3600; preload |
| content-security-policy | block-all-mixed-content; default-src https://loc.gov/ https://*.loc.gov/ ; media-src https://loc.gov/ https://*.loc.gov/ https://*.readspeaker.com/ https://*.arcgis.com/ https://*.arcgisonline.com/ https://webapps-cdn.esri.com/ blob:; worker-src https://loc.gov/ https://*.loc.gov/ blob:; font-src https://loc.gov/ https://*.loc.gov/ https://*.arcgis.com/ https://*.arcgisonline.com/ https://webapps-cdn.esri.com/ https://ssl.p.jwpcdn.com/ data:; img-src https://loc.gov/ https://*.loc.gov/ https://congress.gov/ https://*.congress.gov/ https://*.readspeaker.com/ https://*.arcgis.com/ https://*.arcgisonline.com/ https://webapps-cdn.esri.com/ https://*.ssa.gov/ https://dpm.demdex.net/ https://cm.everesttech.net/ https://*.amazonaws.com data: blob:; connect-src https://loc.gov/ https://*.loc.gov/ https://*.arcgis.com/ https://*.arcgisonline.com/ https://webapps-cdn.esri.com/ https://chat-us.libanswers.com/ https://thelibraryofcongress.tt.omtrdc.net/ https://dpm.demdex.net/ https://d3c605m4lmznjl.cloudfront.net/ https://*.s3.us-east-1.amazonaws.com/; style-src https://loc.gov/ https://*.loc.gov/ https://*.readspeaker.com/ https://*.arcgis.com/ https://*.arcgisonline.com/ https://webapps-cdn.esri.com/ https://ssl.p.jwpcdn.com/ https://assets.adobedtm.com/ https://*.ssa.gov/ 'unsafe-inline' blob:; script-src https://loc.gov/ https://*.loc.gov/ https://*.readspeaker.com/ https://*.arcgis.com/ https://*.arcgisonline.com/ https://webapps-cdn.esri.com/ https://cdn.jsdelivr.net https://ssl.p.jwpcdn.com/ https://assets.adobedtm.com/ https://*.blackbaudcdn.net/ https://*.blackbaud.com/ https://ajax.googleapis.com/ajax/libs/jquery/ https://*.ssa.gov/ https://s.ytimg.com/ 'unsafe-inline' 'unsafe-eval'; frame-src https://loc.gov/ https://*.loc.gov/ https://*.readspeaker.com/ https://*.blackbaudcdn.net/ https://*.blackbaud.com/ https://www.nlstalkingbooks.org/ https://unitedstateslibraryofcongress.demdex.net https://www.youtube-nocookie.com/; frame-ancestors https://loc.gov/ https://*.loc.gov/ https://*.blackbaudcdn.net/ https://*.blackbaud.com/ https://loc.libwizard.com/; report-uri https://errorlogging.loc.gov/api/51/security/?sentry_key=2176ae0b9acd4cd59297edc0e064cc95&sentry_environment=production ; |
| x-frame-options | sameorigin |
| x-content-type-options | nosniff |
| referrer-policy | no-referrer-when-downgrade |
| cache-control | no-transform, max-age=3600 |
| cf-ray | a4f3b6ec2d782c11-IAD |
Security headers HTTP headers that protect visitors from attacks. HSTS forces HTTPS, CSP controls resource loading, X-Frame-Options prevents clickjacking.Read more →
Hosting Physical infrastructure: where the server is, who operates it, and what network it belongs to.Read more →
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| IP Address | 104.17.6.58 |
| Provider | Unknown |
| Organization | N/A |
| ASN | N/A |
| Location | N/A |
Security Score
A (6/7)
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Sitemap & Robots
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Partially restricted
Some areas are hidden from crawlers, but the main content stays open to search engines.
Areas hidden from crawlers:
Entire site
1
Search & filters
2
Other paths
10
⏱️ Crawl delay: 5s
Show raw disallow rules (13)
/
/cgi-bin/
/web_arch/
/rr/mopic/staff
/loc/volunteers
/ficmanagers
/preserv/extranet/
/myloc
/nationalfilmregistry
/fedsearch
/search
/pictures/search
/pictures/related
| Sitemap | Found 49 sitemaps (index) pages |
Social & Meta Tags
Complete
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| Title | Home | Library of Congress |
| Description | The world's largest library. View historic photos, maps, books and more. Contact experts for help with research. Plan a visit. Home of U.S. Copyright Office. |
| OG Title | Home | Library of Congress |
| OG Description | The world's largest library. View historic photos, maps, books and more. Contact experts for help with research. Plan a visit. Home of U.S. Copyright Office. |
| OG Image | http://www.loc.gov/static/images/favicons/open-graph-logo.png |
| OG Type | article |
| OG Site Name | The Library of Congress |
| Language | en |
Mail Security Email authentication records (SPF & DMARC) that prevent spoofing and phishing from this domain.Read more →
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| SPF | ✓ Present v=spf1 include:spf1.loc.gov include:spf2.loc.gov include:spf-00026101.gpphosted.com mx -all |
| DMARC | ✓ Present v=DMARC1;p=none;sp=none;fo=1;rua=mailto:[email protected];ruf=mailto:[email protected];rf=afrf;pct=100 |
| MX Records | 10 → mxb-00026101.gslb.gpphosted.com 10 → mxa-00026101.gslb.gpphosted.com |
Other TLDs Other top-level domain variants of this domain name and their availability. 21 active 3 for sale
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Uptime Monitor
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| Current Status | 🟢 Online |
| HTTP Status | 200 |
| Response Time | 81ms |
| Last Checked | 2026-10-19 13:01:45.524011 |
| Uptime (30d) | 100% |