Technical Information
| HTTP Status Code | 200 |
| HTTP Version | HTTP/1.1 |
| HTTPS | ✔ Available |
| IP Address | 172.64.150.56 |
| Server Software | cloudflare |
| CDN | Cloudflare |
| Compression | gzip |
|
ℹ 🔵 Missing X-Frame-Options | The site can be embedded in iframes by third parties (clickjacking risk). |
HTTP Status Code 200
HTTP Version HTTP/1.1
HTTPS ✔ Available
IP Address 172.64.150.56
Server Software cloudflare
CDN Cloudflare
Compression gzip
ℹ 🔵 Missing X-Frame-Options The site can be embedded in iframes by third parties (clickjacking risk).
Redirect Chain
| # | URL | HTTP Status Code | Status |
| 1 | https://www.substack.com:443 | 301 | HTTP/2 301 |
| 2 | https://substack.com/ | 200 | HTTP/2 200 |
#1 URL https://www.substack.com:443
HTTP Status Code 301
Status HTTP/2 301
#2 URL https://substack.com/
HTTP Status Code 200
Status HTTP/2 200
Performance
| DNS Lookup | 2.9 ms |
| TCP Connect | 5.3 ms |
| TLS Handshake | 8.3 ms |
| Time To First Byte (TTFB) | 452.9 ms |
| Content Download | 157.7 ms |
| Total Response Time | 610.6 ms |
DNS Lookup 2.9 ms
TCP Connect 5.3 ms
TLS Handshake 8.3 ms
Time To First Byte (TTFB) 452.9 ms
Content Download 157.7 ms
Total Response Time 610.6 ms
Security
| HTTPS | ✔ Enabled |
| HSTS | ✔ max-age=31536000; includeSubDomains; preload |
| CSP | ✔ Configured |
| X-Frame-Options | ⚠ Not configured |
| X-Content-Type-Options | ⚠ Not configured |
| HTTP/2 | ⚠ HTTP/1.1 |
HTTPS ✔ Enabled
HSTS ✔ max-age=31536000; includeSubDomains; preload
CSP ✔ Configured
X-Frame-Options ⚠ Not configured
X-Content-Type-Options ⚠ Not configured
HTTP/2 ⚠ HTTP/1.1
SEO Quick Check
Detected Technologies
| Technology | Google Analytics Cloudflare Node.js |
Technology Google Analytics Cloudflare Node.js
HTTP Headers
| Date
| Thu, 23 Jul 2026 12:35:03 GMT |
| Content-type
| text/html; charset=utf-8 |
| Cf-ray
| a1fab905ccd4d081-CDG |
| Cf-cache-status
| DYNAMIC |
| Cache-control
| no-cache |
| Set-cookie
| __cf_bm=qwnXYLRjW6KHBtmeMLjyuN8PgyQd0E4CtgIIJGFSnlc-1784810102.687244-1.0.1.1-f4CtTrIXpizQalLXiWwvMOGM6yYPSRpdasjGWuBb00g0avldO2SRRiE5emfUrM9KOCmywNrZynqQ71RhrycyftyL0bvX2PwMxnyaZRojP3BFysBw1GoDpcJVV4L11JVI; HttpOnly; SameSite=None; Secure; Path=/; Domain=substack.com; Expires=Thu, 23 Jul 2026 13:05:03 GMT |
| X-served-by
| Substack |
| Server
| cloudflare |
| X-service
| web |
| Strict-transport-security
| max-age=31536000; includeSubDomains; preload |
| Vary
| Accept-Encoding |
| Content-security-policy
| frame-ancestors 'self' https://*.substack.com https://substack.com |
| X-cluster
| substack |
| X-deploy
| 85cc2c095f |
| X-powered-by
| Express |
| Content-encoding
| gzip |
| Alt-svc
| h3=":443"; ma=86400 |
Meta Tags
| Norton-safeweb-site-verification | 24usqpep0ejc5w6hod3dulxwciwp0djs6c6ufp96av3t4whuxovj72wfkdjxu82yacb7430qjm8adbd5ezlt4592dq4zrvadcn9j9n-0btgdzpiojfzno16-fnsnu7xd |
| Theme-color | #16171d |
| Description | The app for independent voices |
| Viewport | width=device-width, initial-scale=1, maximum-scale=1, user-scalable=0, viewport-fit=cover |
| Author | Substack |
Date Thu, 23 Jul 2026 12:35:03 GMT
Content-type text/html; charset=utf-8
Cf-ray a1fab905ccd4d081-CDG
Cf-cache-status DYNAMIC
Cache-control no-cache
Set-cookie __cf_bm=qwnXYLRjW6KHBtmeMLjyuN8PgyQd0E4CtgIIJGFSnlc-1784810102.687244-1.0.1.1-f4CtTrIXpizQalLXiWwvMOGM6yYPSRpdasjGWuBb00g0avldO2SRRiE5emfUrM9KOCmywNrZynqQ71RhrycyftyL0bvX2PwMxnyaZRojP3BFysBw1GoDpcJVV4L11JVI; HttpOnly; SameSite=None; Secure; Path=/; Domain=substack.com; Expires=Thu, 23 Jul 2026 13:05:03 GMT
X-served-by Substack
Server cloudflare
X-service web
Strict-transport-security max-age=31536000; includeSubDomains; preload
Vary Accept-Encoding
Content-security-policy frame-ancestors 'self' https://*.substack.com https://substack.com
X-cluster substack
X-deploy 85cc2c095f
X-powered-by Express
Content-encoding gzip
Alt-svc h3=":443"; ma=86400
