d41.co

.co toplist

First seen 2026-04-11 · Last seen 2026-04-11 · ok HTTP/1.1 200 279 ms crawled 2026-05-18

US · 18.165.140.89 · AS16509 Amazon.com, Inc.

Reputation 87/100 weak security headers no dmarc policy

Classifying

HTML metadata

Title: D41 Opt Out

Technology

CDN: Amazon CloudFront
Server: AmazonS3

DNS records live

NS

ns-1457.awsdns-54.org
ns-1651.awsdns-14.co.uk
ns-313.awsdns-39.com
ns-976.awsdns-58.net

MX

10 mail.idp365.net

TXT

Show 5 TXT records

dv2wsgwp1n63lntxq4lpwklsj2qr3fz7
rtdssrpx7xb75k4xycct7tlxrtxh3wcr
95t421kjsjhcjgcnqwm5mcgsr501rx5n
_wuosnbf1j23nsb55mw4abg2xsq3949i
blpxhy9r9k4hrvvcdmyxr8qx3d59j4zs

Email authentication weak

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

Certificate (current)

Corporation Service Company RSA OV SSL CA 2

from 2026-04-14 to 2026-10-30

Expires in 163 days

Full certificate history on crt.sh ↗

HTTP security headers

Header hygiene 30/100 Checked live page: https://d41.co/

findings

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