checkio.org

.org crawl

First seen 2026-04-11 · Last seen 2026-05-18 · ok HTTP/1.1 200 828 ms crawled 2026-05-18

US · 74.207.241.71 · AS63949 Akamai Connected Cloud

Reputation 92/100 no dmarc policy

Classifying

HTML metadata

Title: CheckiO - coding games and programming challenges for beginner and advanced
Language: en

Open Graph

title: CheckiO - coding games and programming challenges for beginner and advanced
description: CheckiO - coding websites and programming games. Improve your coding skills by solving coding challenges and exercises online with your friends in a fun way. Exchanges experience with other users online through fun coding activities

Technology

Server: nginx

Analytics

Google Tag Manager

Fonts

Google Fonts

Social widgets

YouTube Embed

Third-party hosts loaded (7)

d2l28oe7yi95h7.cloudfront.net×28
www.facebook.com×2
fonts.googleapis.com×1
js.sentry-cdn.com×1
www.googletagmanager.com×1
www.recaptcha.net×1
www.youtube.com×1

Social

Contact

Email

a.lyabah@checkio.org

Registration

Registrar

GoDaddy.com, LLC

Created

2010-04-12

Expires

2027-04-12 327 days left

Updated

2026-03-27

Name servers

ns1.digitalocean.com
ns2.digitalocean.com
ns3.digitalocean.com

DNS records live

NS

ns1.digitalocean.com
ns2.digitalocean.com
ns3.digitalocean.com

MX

1 aspmx.l.google.com
10 alt3.aspmx.l.google.com
10 alt4.aspmx.l.google.com
5 alt1.aspmx.l.google.com
5 alt2.aspmx.l.google.com

TXT

google-site-verification=gQkefe4hzBtMNw5Vl2dE_Z_x-VmyuxbfMDGxdIy9YM0
google-site-verification=MpeZ8gVHCFI4EhQ87rl0OA8KFsuKomBg7rtSuhO-qzM

Email authentication weak

SPF

not published

DMARC

not published

DKIM

mail: v=DKIM1; k=rsa; p=MIGfMA0GCSqGSIb3DQEBAQUAA4GNADCBiQKBgQDjGuVmVg+rgA6pmnGt9I+77hCsVkWe8hUW/CEWnVPYrN8aNRIseADgiYhS6ussup/Pu2H7y9PEF+VE06Na66…
s1: k=rsa; t=s; p=MIIBIjANBgkqhkiG9w0BAQEFAAOCAQ8AMIIBCgKCAQEAqg37nxdIH/sIxSJ4VrJwEQ3ddTonf1dIw6zsA0it9QaybellKR7uQ4SaFm7iFIa62EEe04cH7GtDHnHWrH…
s2: k=rsa; t=s; p=MIGfMA0GCSqGSIb3DQEBAQUAA4GNADCBiQKBgQCy0kIyh/LkCze0IruPDSJQZg8dG+c+0DVYQyZnSES2LDgYNX7GM8gXrtjWIrthOAHS4eKU5rcpY2Qt/vQQg2dlEP…

selectors probed

Certificate (current)

R12

from 2026-03-29 to 2026-06-27

Expires in 39 days

Full certificate history on crt.sh ↗

HTTP security headers

Header hygiene 75/100 Checked live page: https://checkio.org/

present

strict-transport-security
x-frame-options
x-content-type-options
referrer-policy
cross-origin-opener-policy

findings

missing Content Security Policy
missing Permissions Policy

Header values

referrer-policy: same-origin
x-frame-options: DENY
x-content-type-options: nosniff
strict-transport-security: max-age=31536000
cross-origin-opener-policy: same-origin