nih.gov 403 🔒 SSL Valid
Checked: (cached 2026-08-20 02:55:25) ↻ Refresh 🔗 Visit site
HTTP Status ?A three-digit code showing if the site loaded successfully (200), redirects (301/302), or has errors (4xx/5xx).Read more →
403
SSL Expires ?When the SSL certificate expires. An expired certificate causes browser security warnings.Read more →
in 179d
Domain Expires ?When the domain registration expires. If not renewed, the domain becomes available to others.Read more →
N/A
Hosting ?The company and location where this website's server is physically located.Read more →
National Institutes of Health
Security ?Score based on key HTTP security headers: HSTS, Content-Security-Policy, and X-Frame-Options.Read more →
2/3
IP Address ?The numerical address of the server hosting this website. Reveals location, provider, and network.Read more →
156.40.212.210
🛠️ Tech Stack ?Technologies detected on this website: CMS, frameworks, libraries, CDN, and analytics tools. 1
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🌐 CDN
Cloudflare
📸 Screenshot 2026-08-20
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Screenshot of nih.gov
Captured: 2026-08-20 03:03:44 · 8.7 KB
🌐 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)156.40.212.210
NSns2.nih.govns3.nih.govns.nih.gov
MX10 nihcesxwayst05.hub.nih.gov10 nihcesxwayst04.hub.nih.gov10 nihcesxwayst03.hub.nih.gov10 nihcesxway6.hub.nih.gov10 nihcesxway5.hub.nih.gov10 nihcesxway4.hub.nih.gov10 nihcesxway3.hub.nih.gov10 nihcesxwayst06.hub.nih.gov
TXT
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atlassian-domain-verification=wdcwOCoxzIePKKuoOG918QCLMqYKy85i2g2UFoGlTcp32Eifql11S8xMtj1bxytf
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v=spf1 ip4:128.231.90.64/26 ip4:165.112.13.0/26 ip4:156.40.79.128/25 ip4:128.231.89.192/28 ip4:165.112.69.16/28 ip4:165.112.194.0/25 ip6:2607:f220:0404:8104::0/64 ip6:2607:f220:402:1a01::0/64 ip6:2607:f220:404:12e::/64 ip6:2607:f220:402:12e::/64 include:spf.protection.outlook.com ~all
apple-domain-verification=8VumNb91MILOLiQZ
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adobe-idp-site-verification=5e85ea0ed34d3d2a09f830d0cfc77139471d15e20e771d90484e89895b0a9f1e
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📋 WHOIS / RDAP ?Public registration data: who registered the domain, when, and when it expires.Read more →
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RegistrarN/A
RegisteredN/A
ExpiresN/A
Last UpdatedN/A
🔒 SSL Certificate ?Encrypts the connection between browsers and this website. Valid SSL = HTTPS works.Read more → Valid
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Subject (CN)www.nih.gov
IssuerGoDaddy.com, Inc.
Valid From2026-02-05
Valid Until2027-02-15 (179 days left)
SANs (28)salud.nih.govdevtestdomain.nih.govstagetestdomain.nih.govstagetestdomain6.nih.govstagetestdomain5.nih.govtestdomain2.nih.govstagetestdomain2.nih.govstagetestdomain7.nih.govwww.nih.comdevtestdomain7.nih.govclinicalresearchtrials.nih.govwww.nih.govnih.govstagetestdomain4.nih.govdevtestdomain4.nih.govnewsinhealth.nih.govdevtestdomain6.nih.govtestdomain.nih.govstagetestdomain3.nih.govwww.health.nih.gov +8 more
📡 HTTP Headers ?Metadata sent by the server: reveals software, caching rules, and security configuration.Read more →
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Status403
Servercloudflare
Content-Typetext/html; charset=UTF-8
Final URLhttps://www.nih.gov/
strict-transport-securitymax-age=31536000; includeSubDomains; preload
x-frame-optionsSAMEORIGIN
x-content-type-optionsnosniff
referrer-policysame-origin
cache-controlprivate, max-age=0, no-store, no-cache, must-revalidate, post-check=0, pre-check=0
cf-raya2de1e7b2b3e7f86-IAD
Security headers ?HTTP headers that protect visitors from attacks. HSTS forces HTTPS, CSP controls resource loading, X-Frame-Options prevents clickjacking.Read more →
HSTS
Content-Security-Policy
X-Frame-Options
🏠 Hosting ?Physical infrastructure: where the server is, who operates it, and what network it belongs to.Read more →
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IP Address156.40.212.210
ProviderNational Institutes of Health
OrganizationNational Institutes of Health
ASNAS3527
CountryUS
CityFrederick
🛡️ Security Score B (5/7)
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Valid SSL
HSTS
CSP
X-Frame-Options
X-Content-Type
Referrer-Policy
Permissions-Policy
🗺️ Sitemap & Robots
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robots.txt Not found
Sitemap Not found
🔗 Social & Meta Tags Missing
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TitleAttention Required! | Cloudflare
Languageen-US
📧 Mail Security ?Email authentication records (SPF & DMARC) that prevent spoofing and phishing from this domain.Read more →
▼
SPF✓ Present
v=spf1 ip4:128.231.90.64/26 ip4:165.112.13.0/26 ip4:156.40.79.128/25 ip4:128.231.89.192/28 ip4:165.112.69.16/28 ip4:165.112.194.0/25 ip6:2607:f220:0404:8104::0/64 ip6:2607:f220:402:1a01::0/64 ip6:2607:f220:404:12e::/64 ip6:2607:f220:402:12e::/64 include:spf.protection.outlook.com ~all
DMARC✓ Present
v=DMARC1; p=reject; rua=mailto:[email protected],mailto:[email protected]; ruf=mailto:[email protected]; fo=1;
MX Records
10 → nihcesxwayst05.hub.nih.gov
10 → nihcesxwayst04.hub.nih.gov
10 → nihcesxwayst03.hub.nih.gov
10 → nihcesxway6.hub.nih.gov
10 → nihcesxway5.hub.nih.gov
10 → nihcesxway4.hub.nih.gov
10 → nihcesxway3.hub.nih.gov
10 → nihcesxwayst06.hub.nih.gov