cassidoo.co

.co crawl

First seen 2026-04-11 · Last seen 2026-05-19 · ok HTTP/1.1 200 1095 ms crawled 2026-05-18

US · 15.197.167.90 · AS16509 Amazon.com, Inc.

Reputation 92/100 no dmarc policy

Classifying

HTML metadata

Title

Cassidy Williams

Description

I'm Cassidy Williams, a software engineer, mom, and overall nerd in Chicago. I write about tech, projects, and whatever else I'm thinking about!

Language

en-us

Generator

Astro v5.16.8

Feeds

Cassidy Williams RSS

Open Graph

url: https://cassidoo.co/
title: Cassidy Williams
description: I'm Cassidy Williams, a software engineer, mom, and overall nerd in Chicago. I write about tech, projects, and whatever else I'm thinking about!

Technology

CDN: Netlify

Analytics

Fathom

Third-party hosts loaded (1)

cdn.usefathom.com×1

Social

DNS records live

NS

dns1.p02.nsone.net
dns2.p02.nsone.net
dns3.p02.nsone.net
dns4.p02.nsone.net

MX

1 smtp.google.com

Verified for

Google

Email authentication weak

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

Certificate (current)

from 2026-05-02 to 2026-07-31

Expires in 71 days

Full certificate history on crt.sh ↗

HTTP security headers

Header hygiene 50/100 Checked live page: https://cassidoo.co/

present

strict-transport-security

findings

missing Content Security Policy
missing frame protection
missing content type protection
missing Referrer Policy
missing Permissions Policy

Header values

strict-transport-security: max-age=31536000