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sigma-squared.org

.org crawl

First seen 2026-05-29 · Last seen 2026-05-31 · ok HTTP/1.1 200 1267 ms crawled 2026-05-31

US · 198.202.211.1 · AS209242 Cloudflare London, LLC

Reputation 94/100 dmarc monitor-only

Classifying

HTML metadata

Title
Sigma Squared I Home
Description
What if the world’s most influential leaders today were best friends 20 years ago? This is what the Sigma Squared Society is all about.

Open Graph

title
Empowering the World's Most Ambitious Founders Under 26
description
What if the world’s most influential leaders today were best friends 20 years ago? This is what the Sigma Squared Society is all about.

Technology

CDN
Cloudflare
jQuery
3.5.1
Analytics
  • Google Tag Manager
Fonts
  • Google Fonts
Social widgets
  • YouTube Embed
Third-party hosts loaded (8)
  • cdn.prod.website-files.com×75
  • www.youtube.com×2
  • ajax.googleapis.com×1
  • cdn.cookie-script.com×1
  • d3e54v103j8qbb.cloudfront.net×1
  • fonts.googleapis.com×1
  • fonts.gstatic.com×1
  • www.googletagmanager.com×1

Social

Contact

Email

Registration

Registrar
Amazon Registrar, Inc.
Created
2021-03-24
Expires
2027-03-24 296 days left
Updated
2026-02-22
Name servers
  • ns-1470.awsdns-55.org
  • ns-1554.awsdns-02.co.uk
  • ns-356.awsdns-44.com
  • ns-791.awsdns-34.net

DNS records live

NS
  • ns-1470.awsdns-55.org
  • ns-1554.awsdns-02.co.uk
  • ns-356.awsdns-44.com
  • ns-791.awsdns-34.net
MX
  • 1 aspmx.l.google.com
  • 10 alt3.aspmx.l.google.com
  • 10 alt4.aspmx.l.google.com
  • 5 alt1.aspmx.l.google.com
  • 5 alt2.aspmx.l.google.com

Email authentication partial

SPF
v=spf1 include:_spf.google.com ~all
softfail (~all)
DMARC
v=DMARC1; p=none;
policy: none (monitoring only)
DKIM
  • google: v=DKIM1; k=rsa; p=MIGfMA0GCSqGSIb3DQEBAQUAA4GNADCBiQKBgQCg0hCGbJkn/mS7x3i9vl5/rUE6symHeVoZBMSzg8FxzBSk0Ztdirz4Sd/74iWL9smrYczuk4QJ50ZGh1LBwi…
selectors probed

Certificate (current)

WE1
from 2026-05-04 to 2026-08-02
Expires in 62 days

Full certificate history on crt.sh ↗

HTTP security headers

Header hygiene 50/100 Checked live page: https://www.sigma-squared.org/

present
  • strict-transport-security
findings
  • missing Content Security Policy
  • missing frame protection
  • missing content type protection
  • missing Referrer Policy
  • missing Permissions Policy
Header values
strict-transport-security
max-age=31536000

Links to (27)

Linked from (1)