indexo.dev

charlespetzold.com

.com crawl

First seen 2026-04-13 · Last seen 2026-05-14 · ok HTTP/1.1 200 1189 ms crawled 2026-05-07

US · 66.96.146.102 · AS29873 Newfold Digital, Inc.

Reputation 87/100 weak security headers no dmarc policy

sector tech type homepage

HTML metadata

Title
Charles Petzold
Description
Charles Petzold is the author of the books Code and The Annotated Turing
Language
en

Registration

Registrar
Domain.com - Network Solutions, LLC
Created
1999-08-26
Expires
2026-08-26 97 days left
Updated
2025-08-11
Name servers
  • ns1.verio.com
  • ns2.verio.com

DNS records live

NS
  • ns1.verio.com
  • ns2.verio.com
MX
  • 30 mx.charlespetzold.com

Email authentication partial

SPF
v=spf1 ip4:66.96.128.0/18 include:websitewelcome.com ?all
neutral (?all)
DMARC
not published
DKIM
no key found at common selectors

Certificate (current)

E7
from 2026-04-04 to 2026-07-03
Expires in 43 days

Full certificate history on crt.sh ↗

HTTP security headers

Header hygiene 30/100 Checked live page: https://charlespetzold.com/

findings
  • missing HSTS
  • missing Content Security Policy
  • missing frame protection
  • missing content type protection
  • missing Referrer Policy
  • missing Permissions Policy

Links to (1)

Linked from (3)