indexo.dev

threeplusone.com

.com crawl

First seen 2026-04-18 · Last seen 2026-05-09 · ok HTTP/1.1 200 1850 ms crawled 2026-05-12

US · 185.199.110.153 · AS54113 Fastly, Inc.

Reputation 87/100 weak security headers no dmarc policy

sector tech type homepage

HTML metadata

Title
Gavin E. Crooks
Description
The physics of information
Language
en
Canonical
https://threeplusone.com/
Feeds

Open Graph

url
https://threeplusone.com/
title
Gavin E. Crooks
locale
en_US
site name
Gavin E. Crooks
description
The physics of information

Technology

CDN
Fastly
Server
GitHub.com
Analytics
  • Google Tag Manager

Third-party hosts loaded (2)

  • cdn.jsdelivr.net×3
  • www.googletagmanager.com×1

Social

Registration

Registrar
NameCheap, Inc.
Created
2000-11-22
Expires
2026-11-22 186 days left
Updated
2025-10-23
Name servers
  • dns1.registrar-servers.com
  • dns2.registrar-servers.com

DNS records live

NS
  • dns1.registrar-servers.com
  • dns2.registrar-servers.com
MX
  • 1 aspmx.l.google.com
  • 10 aspmx2.googlemail.com
  • 10 aspmx3.googlemail.com
  • 5 alt1.aspmx.l.google.com
  • 5 alt2.aspmx.l.google.com

Email authentication weak

SPF
not published
DMARC
not published
DKIM
no key found at common selectors

Certificate (current)

R12
from 2026-04-12 to 2026-07-11
Expires in 53 days

Full certificate history on crt.sh ↗

HTTP security headers

Header hygiene 30/100 Checked live page: https://threeplusone.com/

findings
  • missing HSTS
  • missing Content Security Policy
  • missing frame protection
  • missing content type protection
  • missing Referrer Policy
  • missing Permissions Policy

Links to (8)

Linked from (1)