indexo.dev

sliderulemuseum.com

.com crawl

First seen 2026-04-20 · Last seen 2026-05-11 · ok HTTP/1.1 200 2007 ms crawled 2026-05-14

CA · 209.235.145.186 · AS30447 Internet Names For Business Inc.

Reputation 92/100 no dmarc policy

Classifying

HTML metadata

Title
International Slide Rule Museum home page. ISRM is the world's largest free digital repository of all things concerning slide rules and other math artifacts. There are over 7000 Images or PDF's in the ISRM Galleries.

Open Graph

url
https://www.sliderulemuseum.com
title
International Slide Rule Museum
site name
International Slide Rule Museum

Technology

Third-party hosts loaded (3)

  • count.carrierzone.com×2
  • widgets.guidestar.org×1
  • www.paypal.com×1

Social

Registration

Registrar
Hostopia Canada Corp
Created
2005-04-27
Expires
2031-04-27 1803 days left
Updated
2022-06-29
Name servers
  • ns1.abac.com
  • ns2.abac.com

DNS records live

NS
  • ns1.aplus.net
  • ns2.aplus.net
  • ns3.aplus.net
MX
  • 10 mx1c40.carrierzone.com
  • 100 mx2c40.carrierzone.com
  • 110 mx3c40.carrierzone.com

Email authentication weak

SPF
v=spf1 include:spfc40.carrierzone.com ~all
softfail (~all)
DMARC
not published
DKIM
no key found at common selectors

Certificate (current)

Sectigo Public Server Authentication CA DV R36
from 2025-12-16 to 2026-12-01
Expires in 195 days

Full certificate history on crt.sh ↗

HTTP security headers

Header hygiene 50/100 Checked live page: https://sliderulemuseum.com/

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=15768000

Links to (10)

Linked from (1)