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columbine-instructor-guide.com

.com crawl

First seen 2026-05-03 · Last seen 2026-05-16 · ok HTTP/1.1 200 1254 ms crawled 2026-05-10

US · 107.180.46.146 · AS400754 GoDaddy.com, LLC

Reputation 87/100 weak security headers no dmarc policy

sector education type docs

HTML metadata

Title
Columbine Teacher's Guide: Overview (Columbine Instructor Guide)
Description
Columbine Teacher's Guide for college or high school Humanities: Enlish, psychology, journalism...Bowling for Columbine, Teen depression unit, overcoming adversity, PTSD. Bowling for Columbine, social studies, media studies, school safety. For Columbine, book by Dave Cullen.

Technology

Server
Apache
CMS
Joomla

Social

Registration

Registrar
GoDaddy.com, LLC
Created
2010-10-24
Expires
2027-10-24 521 days left
Updated
2025-10-25
Name servers
  • ns41.domaincontrol.com
  • ns42.domaincontrol.com

DNS records live

NS
  • ns31.domaincontrol.com
  • ns32.domaincontrol.com
  • ns41.domaincontrol.com
  • ns42.domaincontrol.com
MX
  • 0 smtp.secureserver.net
  • 10 mailstore1.secureserver.net

Email authentication weak

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

Certificate (current)

columbine-instructor-guide.com
from 2020-03-12 to 2021-03-12
Expired 1895 days ago

Full certificate history on crt.sh ↗

HTTP security headers

Header hygiene 35/100 Checked over plain HTTP: http://columbine-instructor-guide.com/

findings
  • checked over plain HTTP
  • missing Content Security Policy
  • missing frame protection
  • missing content type protection
  • missing Referrer Policy
  • missing Permissions Policy

Links to (5)

Linked from (2)