indexo.dev

electronics-tutorials.com

.com crawl

First seen 2026-04-21 · Last seen 2026-05-14 · ok HTTP/1.1 200 863 ms crawled 2026-05-14

US · 172.67.185.15 · AS13335 Cloudflare, Inc.

Reputation 77/100 weak security headers permissive spf no dmarc policy

Classifying

HTML metadata

Title
electronics tutorials for newcomers learn basic electronics for free
Description
Offering free comprehensive basic electronics tutorials in amplifiers, antennas, filters, oscillators, power supply, receivers, radio and electronics design.

Technology

CDN
Cloudflare
Analytics
  • Google Tag Manager
Ads
  • Amazon Ads
  • Google AdSense

Third-party hosts loaded (4)

  • ir-na.amazon-adsystem.com×1
  • pagead2.googlesyndication.com×1
  • translate.google.com×1
  • www.googletagmanager.com×1

Registration

Registrar
Tucows Domains Inc.
Created
2000-06-13
Expires
2027-06-13 390 days left
Updated
2026-05-13
Name servers
  • brianna.ns.cloudflare.com
  • dean.ns.cloudflare.com

DNS records live

NS
  • brianna.ns.cloudflare.com
  • dean.ns.cloudflare.com
MX
  • 1 test.mail.protection.outlook.com

Email authentication weak

SPF
v=spf1 a mx +all
permissive (+all) — anyone can send as this domain
DMARC
not published
DKIM
  • default: t=y; p=MHwwDQYJKoZIhvcNAQEBBQADawAwaAJhANviZe+j42zwY+BpVPXb/eqPzCof/JdyFG+KmUPYklJBn50jiedF/MBwanCgYt3X6x+k0n1DVAa3svjPUr2CdHqbFR+Rr5ZHiomdO…
selectors probed

Certificate (current)

WE1
from 2026-05-07 to 2026-08-05
Expires in 78 days

Full certificate history on crt.sh ↗

HTTP security headers

Header hygiene 40/100 Checked live page: https://electronics-tutorials.com/

present
  • x-frame-options
findings
  • missing HSTS
  • missing Content Security Policy
  • missing content type protection
  • missing Referrer Policy
  • missing Permissions Policy
Header values
x-frame-options
SAMEORIGIN

Links to (7)

Linked from (1)