indexo.dev

jkellz.dev

.dev crawl

First seen 2026-04-14 · Last seen 2026-04-14 · ok HTTP/1.1 200 853 ms crawled 2026-05-07

US · 188.114.96.3 · AS13335 Cloudflare, Inc.

Reputation 93/100 weak security headers dmarc quarantine

sector tech type blog

HTML metadata

Title
jkellz.dev/*
Description
Jonathan Kellenberg
Language
en
Feeds

Open Graph

url
https://jkellz.dev/
title
jkellz.dev/*
locale
en_GB
site name
jkellz.dev/*
description
Jonathan Kellenberg

Technology

CDN
Cloudflare

Social

DNS records live

NS
  • lilith.ns.cloudflare.com
  • mitchell.ns.cloudflare.com
MX
  • 10 mail.protonmail.ch
  • 20 mailsec.protonmail.ch
TXT
  • protonmail-verification=7e73bc51f1e800a5eeee92d9e3d6056c2cd2950b
  • openpgp4fpr:718032837D642A615E91DBB37B99F959B717021C

Email authentication strong

SPF
v=spf1 include:_spf.protonmail.ch ~all
softfail (~all)
DMARC
v=DMARC1; p=quarantine; pct=100; adkim=s; aspf=s
policy: quarantine
DKIM
no key found at common selectors

Certificate (current)

WE1
from 2026-04-19 to 2026-07-18
Expires in 60 days

Full certificate history on crt.sh ↗

HTTP security headers

Header hygiene 45/100 Checked live page: https://jkellz.dev/

present
  • x-content-type-options
  • referrer-policy
findings
  • missing HSTS
  • missing Content Security Policy
  • missing frame protection
  • missing Permissions Policy
Header values
referrer-policy
strict-origin-when-cross-origin
x-content-type-options
nosniff

Links to (5)

Linked from (1)