indexo.dev

johnathanbi.com

.com crawl

First seen 2026-04-14 · Last seen 2026-05-08 · ok HTTP/1.1 200 8582 ms crawled 2026-05-07

US · 3.231.35.217 · AS14618 Amazon.com, Inc.

Reputation 92/100 no dmarc policy

Classifying

HTML metadata

Title
Johnathan Bi | Substack
Description
Studying the great books, sharing my learnings through lectures & interviews. Click to read Johnathan Bi, a Substack publication with tens of thousands of subscribers.
Language
en
Canonical
https://www.johnathanbi.com/
Feeds

Open Graph

url
https://www.johnathanbi.com/
title
Johnathan Bi | Substack
description
Studying the great books, sharing my learnings through lectures & interviews. Click to read Johnathan Bi, a Substack publication with tens of thousands of subscribers.

Technology

CDN
Cloudflare
CMS
Gatsby
Analytics
  • Cloudflare Insights
Fonts
  • Google Fonts

Third-party hosts loaded (4)

  • substackcdn.com×261
  • fonts.gstatic.com×1
  • js.sentry-cdn.com×1
  • static.cloudflareinsights.com×1

Registration

Registrar
Tucows Domains Inc.
Created
2018-07-01
Expires
2026-07-01 42 days left
Updated
2026-01-31
Name servers
  • dns1.p08.nsone.net
  • dns2.p08.nsone.net
  • dns3.p08.nsone.net
  • dns4.p08.nsone.net
  • ns01.squarespacedns.com
  • ns02.squarespacedns.com
  • ns03.squarespacedns.com
  • ns04.squarespacedns.com

DNS records live

NS
  • dns1.p08.nsone.net
  • dns2.p08.nsone.net
  • dns3.p08.nsone.net
  • dns4.p08.nsone.net
  • ns01.squarespacedns.com
  • ns02.squarespacedns.com
  • ns03.squarespacedns.com
  • ns04.squarespacedns.com
MX
  • 0 mail.johnathanbi.com

Email authentication partial

SPF
v=spf1 a mx include:websitewelcome.com ~all
softfail (~all)
DMARC
not published
DKIM
no key found at common selectors

Certificate (current)

E7
from 2026-03-22 to 2026-06-20
Expires in 32 days

Full certificate history on crt.sh ↗

HTTP security headers

Header hygiene 65/100 Checked live page: https://www.johnathanbi.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

Links to (2)

Linked from (2)