indexo.dev

markdjacobsen.com

.com crawl

First seen 2026-04-14 · Last seen 2026-05-04 · ok HTTP/1.1 200 501 ms crawled 2026-05-07

US · 188.114.97.3 · AS13335 Cloudflare, Inc.

Reputation 94/100 dmarc monitor-only

Classifying

HTML metadata

Title
Home | Mark D. Jacobsen
Description
Writer, builder, and political scientist exploring what it means to live well in a complex world.
Language
en
Canonical
https://www.markdjacobsen.com/
Feeds

Open Graph

url
https://www.markdjacobsen.com/
title
Home | Mark D. Jacobsen
description
Writer, builder, and political scientist exploring what it means to live well in a complex world.

Technology

CDN
Cloudflare
Analytics
  • Google Tag Manager
Fonts
  • Google Fonts

Third-party hosts loaded (3)

  • fonts.googleapis.com×2
  • fonts.gstatic.com×1
  • www.googletagmanager.com×1

Registration

Registrar
NameCheap, Inc.
Created
2018-12-27
Expires
2026-12-27 220 days left
Updated
2025-11-27
Name servers
  • nia.ns.cloudflare.com
  • osmar.ns.cloudflare.com

DNS records live

NS
  • nia.ns.cloudflare.com
  • osmar.ns.cloudflare.com
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
Verified for
  • Google

Email authentication strong

SPF
v=spf1 a mx include:websitewelcome.com ~all
softfail (~all)
DMARC
v=DMARC1; p=none;
policy: none (monitoring only)
DKIM
  • default: v=DKIM1; k=rsa; p=MIIBIjANBgkqhkiG9w0BAQEFAAOCAQ8AMIIBCgKCAQEAyf0APIt0hZ6YATpilR0MVT5iAXsUxIhgDlunMt6FIEr/sHo63J/McuxFfo6xnfE1H0Kad0/uxg6r3Q…
selectors probed

Certificate (current)

WE1
from 2026-04-22 to 2026-07-21
Expires in 61 days

Full certificate history on crt.sh ↗

HTTP security headers

Header hygiene 75/100 Checked live page: https://markdjacobsen.com/

present
  • content-security-policy
  • x-frame-options
  • x-content-type-options
  • referrer-policy
  • permissions-policy
findings
  • missing HSTS
  • CSP allows unsafe inline scripts/styles
Header values
referrer-policy
strict-origin-when-cross-origin
x-frame-options
DENY
permissions-policy
camera=(), microphone=(), geolocation=()
x-content-type-options
nosniff
content-security-policy
default-src 'self'; script-src 'self' 'unsafe-inline' www.googletagmanager.com; style-src 'self' 'unsafe-inline' fonts.googleapis.com; font-src 'self' fonts.gstatic.com; img-src 'self' data:; connect-src 'self' www.google-analytics.com region1.google-analytics.com analytics.google.com mailinglist.markdjacobsen.com; frame-ancestors 'none'; base-uri 'self'; form-action 'self'

Linked from (1)