🌐 slack.de 200 🔒 SSL Valid
Checked: just now 🔗 Visit site
✨ About this site
A lesser-known site using Cloudflare infrastructure with the title "The Notification Avalanche".
📊 What the data says
The website is hosted on Cloudflare with a perfectly valid SSL certificate until late 2026. It currently maintains an HTTP 200 status and achieves a perfect performance score of 100 on both mobile and desktop.
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 70d
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 →
0/3
IP Address ?The numerical address of the server hosting this website. Reveals location, provider, and network.Read more →
104.21.16.200
Performance ?Lighthouse performance score from Google PageSpeed Insights (0–100). Measures real-world loading speed, interactivity and visual stability.
100 mob
Uptime
100%
⚡ Performance ?Lighthouse performance score from Google PageSpeed Insights (0–100). Measures real-world loading speed, interactivity and visual stability. 100
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Mobile
100
Score
96
Accessibility
100
Best Practices
91
SEO
LCP 0.76s
CLS 0.001
FCP 0.76s
TTFB 0.00s
TBT 0ms
SI 1.45s
Desktop
100
Score
96
Accessibility
100
Best Practices
91
SEO
LCP 0.43s
CLS 0.000
FCP 0.43s
TTFB 0.00s
TBT 0ms
SI 0.56s
Checked: 2026-09-04 13:55:53.094119 · View on PageSpeed
🛠️ Tech Stack ?Technologies detected on this website: CMS, frameworks, libraries, CDN, and analytics tools. 1
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🌐 CDN
Cloudflare
📸 Screenshot 2026-09-02
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Screenshot of slack.de
Captured: 2026-09-02 15:49:06 · 9 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)104.21.16.200172.67.215.152
AAAA (IPv6)2606:4700:3032::ac43:d7982606:4700:3034::6815:10c8
NSclara.ns.cloudflare.comharlan.ns.cloudflare.com
MX10 mx01.ionos.de10 mx00.ionos.de
TXT (1)
v=spf1 include:_spf-eu.ionos.com ~all
📋 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)slack.de
IssuerGoogle Trust Services
Valid From2026-10-02
Valid Until2026-12-31 (70 days left)
SANs (2)slack.de*.slack.de
📡 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
Final URLhttps://slack.de/
cf-raya4e035148e4af4e3-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 Address104.21.16.200
ProviderUnknown
OrganizationN/A
ASNN/A
LocationN/A
🛡️ Security Score F (1/7)
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Valid SSL
HSTS
CSP
X-Frame-Options
X-Content-Type
Referrer-Policy
Permissions-Policy
🗺️ Sitemap & Robots
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Open to search engines
This site's robots.txt lets crawlers access its main content. Search engines can index it normally.
No paths are disallowed — everything is crawlable.
Sitemap Not found
🔗 Social & Meta Tags Missing
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TitleThe Notification Avalanche
Languagede
📧 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:_spf-eu.ionos.com ~all
DMARCNot set
MX Records
10 → mx01.ionos.de
10 → mx00.ionos.de
🌍 Other TLDs ?Other top-level domain variants of this domain name and their availability. 16 active 6 for sale 1 available
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.com ●
.net ●
.org ●
.info taken
.io taken
.co taken
.dev ●
.app taken
.me ●
.biz ●
.eu taken
.xyz ●
.fi Available
.se ●
.de current
.uk taken
.fr ●
.nl ●
.es ●
.it ●
.us ●
.ca ●
.com.au ●
.co.uk ●
📡 Uptime Monitor
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Current Status 🟢 Online
HTTP Status 200
Response Time 317ms
Last Checked 2026-10-19 22:46:27.468722
Uptime (30d) 100%