indexo.dev

physics.info

.info crawl

First seen 2026-04-17 · Last seen 2026-05-09 · ok HTTP/1.1 200 1383 ms crawled 2026-05-12

US · 172.67.158.163 · AS13335 Cloudflare, Inc.

Reputation 94/100 dmarc monitor-only

Classifying

HTML metadata

Title
The Physics Hypertextbook
Description
The Physics Hypertextbook is a reaction to three big problems with textbooks: lack of writer's voice, layouts that reduce readability, and outdated economics.
Language
en
Canonical
https://physics.info

Open Graph

url
https://physics.info
title
The Physics Hypertextbook
site name
The Physics Hypertextbook
description
The Physics Hypertextbook is a reaction to three big problems with textbooks: lack of writer's voice, layouts that reduce readability, and outdated economics.

Technology

CDN
Cloudflare
Analytics
  • Cloudflare Insights
  • Google Tag Manager

Third-party hosts loaded (6)

  • omniscientwalnut.com×7
  • hypertextbook.com×6
  • ajax.googleapis.com×1
  • glennelert.us×1
  • static.cloudflareinsights.com×1
  • www.googletagmanager.com×1

Social

Registration

Registrar
eNom, LLC
Created
2002-07-13
Expires
2030-07-13 1516 days left
Updated
2024-10-26
Name servers
  • tina.ns.cloudflare.com
  • cleo.ns.cloudflare.com

DNS records live

NS
  • cleo.ns.cloudflare.com
  • tina.ns.cloudflare.com
MX
  • 10 mx01.mail.icloud.com
  • 10 mx02.mail.icloud.com
TXT
  • google-site-verification=xTiSKZe-i9qqZhS2-7YadwjS1OgWoRac3f8mVY7cnfk
  • apple-domain=RssC9hiGRxytgmSG

Email authentication partial

SPF
v=spf1 +a +mx +ip4:172.96.186.143 +ip4:173.192.232.253 +ip4:173.192.209.197 include:icloud.com ~all
softfail (~all)
DMARC
v=DMARC1; p=none; rua=mailto:1644df55178549628b8d9197efa3b4f2@dmarc-reports.cloudflare.net
policy: none (monitoring only)
DKIM
  • default: v=DKIM1; k=rsa; p=MIIBIjANBgkqhkiG9w0BAQEFAAOCAQ8AMIIBCgKCAQEAzJT2HZH3nJZ8v/jLzMBCFRZ+F6o6JiX/GhttPnBU41dRqKFkqDAvIn8PwQDClwNUbVo2o7msbt/tX4…
selectors probed

Certificate (current)

WE1
from 2026-05-01 to 2026-07-30
Expires in 72 days

Full certificate history on crt.sh ↗

HTTP security headers

Header hygiene 60/100 Checked live page: https://physics.info/

present
  • strict-transport-security
  • x-content-type-options
findings
  • missing Content Security Policy
  • missing frame protection
  • missing Referrer Policy
  • missing Permissions Policy
Header values
x-content-type-options
nosniff
strict-transport-security
max-age=15552000; includeSubDomains; preload

Links to (9)

Linked from (2)