kirschsubstack.com

.com crawl

First seen 2026-04-11 · Last seen 2026-05-19 · ok HTTP/1.1 200 888 ms crawled 2026-05-18

US · 104.18.36.24 · AS13335 Cloudflare, Inc.

Reputation 100/100

Classifying

HTML metadata

Title

Steve Kirsch's newsletter | Substack

Description

I've written over 1,700 articles about COVID, vaccines, corruption, censorship, and early treatments. The data shows that the COVID vaccines have no benefit and have killed over 500,000 Americans. The data is publicly available, but nobody wants to look. Click to read Steve Kirsch's newsletter, a Substack publication with hundreds of thousands of subscribers.

Language

Canonical

https://kirschsubstack.com/

Feeds

Steve Kirsch's newsletter RSS

Open Graph

url: https://kirschsubstack.com/
title: Steve Kirsch's newsletter | Substack
description: I've written over 1,700 articles about COVID, vaccines, corruption, censorship, and early treatments. The data shows that the COVID vaccines have no benefit and have killed over 500,000 Americans. The data is publicly available, but nobody wants to look. Click to read Steve Kirsch's newsletter, a Substack publication with hundreds of thousands of subscribers.

Technology

CDN: Cloudflare
CMS: Gatsby

Analytics

Cloudflare Insights

Fonts

Google Fonts

Third-party hosts loaded (4)

substackcdn.com×248
fonts.gstatic.com×1
js.sentry-cdn.com×1
static.cloudflareinsights.com×1

Registration

Registrar

Cloudflare, Inc.

Created

2023-07-06

Expires

2029-07-06 1143 days left

Updated

2024-06-10

Name servers

ashton.ns.cloudflare.com
tori.ns.cloudflare.com

DNS records live

NS

ashton.ns.cloudflare.com
tori.ns.cloudflare.com

Email authentication no MX

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

Certificate (current)

WE1

from 2026-04-21 to 2026-07-20

Expires in 61 days

Full certificate history on crt.sh ↗

HTTP security headers

Header hygiene 65/100 Checked live page: https://kirschsubstack.com/

present

strict-transport-security
content-security-policy

findings

CSP uses wildcard sources
missing frame protection
missing content type protection
missing Referrer Policy
missing Permissions Policy

Header values

content-security-policy: frame-ancestors 'self' https://*.substack.com https://substack.com
strict-transport-security: max-age=31536000; includeSubDomains; preload