indexo.dev

bluecourses.com

.com crawl

First seen 2026-04-20 · Last seen 2026-05-14 · ok HTTP/1.1 200 5126 ms crawled 2026-05-14

US · 52.38.30.184 · AS16509 Amazon.com, Inc.

Reputation 92/100 no dmarc policy

Classifying

HTML metadata

Title
| BlueCourses
Language
en

Technology

Server
nginx
CMS
Gatsby

Third-party hosts loaded (4)

  • d24jp206mxeyfm.cloudfront.net×12
  • d1uwn6yupg8lfo.cloudfront.net×3
  • enext-analytics.s3.amazonaws.com×3
  • files.edx.org×1

Registration

Registrar
One.com A/S
Created
2019-06-11
Expires
2027-06-11 388 days left
Updated
2026-05-12
Name servers
  • ns01.one.com
  • ns02.one.com

DNS records live

NS
  • ns01.one.com
  • ns02.one.com
MX
  • 10 mx1.mailpod15-cph3.g1i.one.com
  • 10 mx2.mailpod15-cph3.g1i.one.com
  • 10 mx3.mailpod15-cph3.g1i.one.com
  • 10 mx4.mailpod15-cph3.g1i.one.com
TXT
  • google-site-verification=1zG2Lo2-KvplEFDZfVZlpdZyY3w7XJbv2QyLJMKSGpc

Email authentication weak

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

Certificate (current)

R13
from 2026-04-22 to 2026-07-21
Expires in 63 days

Full certificate history on crt.sh ↗

HTTP security headers

Header hygiene 60/100 Checked live page: https://www.bluecourses.com/

present
  • strict-transport-security
  • x-frame-options
findings
  • missing Content Security Policy
  • missing content type protection
  • missing Referrer Policy
  • missing Permissions Policy
Header values
x-frame-options
SAMEORIGIN
strict-transport-security
max-age=31536000; includeSubDomains

Links to (2)

Linked from (1)