indexo.dev

competitiveprogramming.info

.info crawl

First seen 2026-04-14 · Last seen 2026-05-06 · ok HTTP/1.1 200 1037 ms crawled 2026-05-08

JP · 160.251.206.130 · AS58791 GMO Internet Group, Inc.

Reputation 92/100 no dmarc policy

Classifying

HTML metadata

Title
competitiveprogramming.info

Technology

Server
nginx
Analytics
  • Google Tag Manager

Third-party hosts loaded (3)

  • ajax.googleapis.com×1
  • d3js.org×1
  • www.googletagmanager.com×1

Registration

Registrar
GMO Internet Group, Inc. d/b/a Onamae.com
Created
2015-04-15
Expires
2027-04-15 331 days left
Updated
2024-08-31
Name servers
  • 01.dnsv.jp
  • 02.dnsv.jp
  • 03.dnsv.jp
  • 04.dnsv.jp

DNS records live

NS
  • 01.dnsv.jp
  • 02.dnsv.jp
  • 03.dnsv.jp
  • 04.dnsv.jp
MX
  • 10 competitiveprogramming.info
TXT
  • google-site-verification=yB6MDIBG92v0W8EwxsU9pzWLgdrHDW_9B6vHZtJALbs

Email authentication weak

SPF
v=spf1 ip4:160.251.206.130 ~all
softfail (~all)
DMARC
not published
DKIM
  • default: v=DKIM1; h=sha256; k=rsa; p=MIIBIjANBgkqhkiG9w0BAQEFAAOCAQ8AMIIBCgKCAQEAr9LCApog25ms69X6ieFmOt2ZKWBDyFUsSD4lRoLzqLE0X4iNjzOAGk2ok0kVgWmrHYEH…
selectors probed

Certificate (current)

E8
from 2026-05-02 to 2026-07-31
Expires in 73 days

Full certificate history on crt.sh ↗

HTTP security headers

Header hygiene 75/100 Checked live page: https://competitiveprogramming.info/

present
  • strict-transport-security
  • x-frame-options
  • x-content-type-options
  • referrer-policy
findings
  • missing Content Security Policy
  • missing Permissions Policy
Header values
referrer-policy
strict-origin-when-cross-origin
x-frame-options
SAMEORIGIN
x-content-type-options
nosniff
strict-transport-security
max-age=31536000; includeSubdomains;

Links to (1)

Linked from (1)