🌐 substack.app 200 🔒 SSL Valid
Checked: just now 🔗 Visit site
↪
This domain forwards to upstract.com (checked 0d ago)
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 53d
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 →
Unknown
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 →
207.207.210.23
Performance ?Lighthouse performance score from Google PageSpeed Insights (0–100). Measures real-world loading speed, interactivity and visual stability.
72 mob
Uptime
100%
⚡ Performance ?Lighthouse performance score from Google PageSpeed Insights (0–100). Measures real-world loading speed, interactivity and visual stability. 72
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Mobile
72
Score
94
Accessibility
81
Best Practices
100
SEO
LCP 4.56s
CLS 0.000
FCP 3.39s
TTFB 0.04s
TBT 102ms
SI 5.95s
Desktop
73
Score
94
Accessibility
81
Best Practices
100
SEO
LCP 1.32s
CLS 0.000
FCP 1.04s
TTFB 0.01s
TBT 441ms
SI 1.72s
Checked: 2026-09-05 03:06:54.004996 · View on PageSpeed
🛠️ Tech Stack ?Technologies detected on this website: CMS, frameworks, libraries, CDN, and analytics tools.
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No technologies detected

📸 Screenshot
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Screenshot not available yet.

🌐 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)207.207.210.23207.207.210.50207.207.210.36
NScuritiba.ns.porkbun.comfortaleza.ns.porkbun.commaceio.ns.porkbun.comsalvador.ns.porkbun.com
📋 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)substack.app
IssuerLet's Encrypt
Valid From2026-09-11
Valid Until2026-12-10 (53 days left)
SANs (2)*.substack.appsubstack.app
📡 HTTP Headers ?Metadata sent by the server: reveals software, caching rules, and security configuration.Read more →
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Status200
Servercloudflare
Content-Typetext/html; charset=utf-8
Final URLhttps://upstract.com/?ref=substack.app
strict-transport-securitymax-age=31556926; includeSubDomains
x-frame-optionsSAMEORIGIN
x-content-type-optionsnosniff
referrer-policystrict-origin-when-cross-origin
permissions-policybrowsing-topics=()
cache-controlno-store, no-cache, must-revalidate, max-age=0
cf-raya4c493f1fc823550-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 Address207.207.210.23
ProviderUnknown
OrganizationN/A
ASNN/A
LocationN/A
🛡️ Security Score A (6/7)
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Valid SSL
HSTS
CSP
X-Frame-Options
X-Content-Type
Referrer-Policy
Permissions-Policy
🗺️ Sitemap & Robots
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No robots.txt
This site has no robots.txt file, so crawlers may access everything by default.
Sitemap Not found
🔗 Social & Meta Tags
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No meta tags detected.

📧 Mail Security ?Email authentication records (SPF & DMARC) that prevent spoofing and phishing from this domain.Read more →
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SPFNot set
DMARCNot set
🌍 Other TLDs ?Other top-level domain variants of this domain name and their availability. 20 active 3 for sale
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.com ●
.net ●
.org taken
.info ●
.io ●
.co ●
.dev ●
.app current
.me taken
.biz taken
.eu ●
.xyz ●
.fi ●
.se ●
.de ●
.uk ●
.fr ●
.nl ●
.es ●
.it ●
.us ●
.ca ●
.com.au ●
.co.uk ●
📡 Uptime Monitor
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Current Status 🟢 Online
HTTP Status 200
Response Time 590ms
Last Checked 2026-10-16 22:30:53.890066
Uptime (30d) 100%