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codechef.com Paid content

Categories: Development Education & Learning

Tags: Online Courses

Learn coding with our free and beginner friendly courses on Python, Java, C, C++, Data structures, Algorithms, SQL. Solve our collection of 1000s of problems to practice coding.

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Updated: 2026-09-03 15:06 Language: English (default) Access: Normal

Profile views 12 Outbound visits 11
CodeChef Full homepage screenshot

Website Overview

An established domain and managed infrastructure suggest continuity of operations and may support dependable delivery, although neither guarantees service quality.

Domain and Registration

Registered in 2005, this domain has about 21 years of history. That suggests continuity, although ownership and purpose may have changed. Transfer-protection status is present, helping reduce the risk of unauthorized domain transfers. The domain uses the common .com extension, which is not an independent safety signal.

DNS and Email

The lowest TTL is 60 seconds, supporting rapid record changes at the cost of more frequent lookups. Nameservers are provided by Cloudflare, indicating managed DNS hosting. MX records point to the Google Workspace email service. No CNAME was found; the observed records resolve directly to addresses. SPF and DMARC are configured. DKIM status is unknown.

TLS and Certificates

The public key uses EC with 256 bits. The server supplied a complete certificate chain. No organization name is present in the certificate; the available fields are consistent with domain validation. The certificate was issued within the Google Trust Services cloud or CDN ecosystem. The certificate's total validity is about 90 days, consistent with a short renewal cycle.

HTTP and Browser Security

The response lacks these common security headers: X-Content-Type-Options, Referrer-Policy, Permissions-Policy. No X-Powered-By header was found, reducing one common source of backend fingerprinting information. The cf-ray response header indicates a CDN or caching proxy in the delivery path. No obvious internal addresses or debug information were found in the headers. The Server header identifies cloudflare without an exact version.

Technology Stack Analysis

The public page identifies jQuery, Google Tag Manager, Cloudflare without precise versions, leaving fewer clues for version-specific scanning.

Search and Social Sharing

The meta description has 177 characters and may be shortened in search results. JSON-LD includes Organization data, helping describe the organization as an entity. The title has 50 characters, within a common display range. The observed directives allow indexing and link following. No Generator meta tag is publicly exposed.

Hosting and Email

DNSCloudflare
HostingCloudflare
EmailGoogle Workspace
Location Location unknown 104.26.4.157

Pages, Search and Sharing

Meta descriptionLearn coding with our free and beginner friendly courses on Python, Java, C, C++, Data structures, Algorithms, SQL. Solve our collection of 1000s of problems to practice coding.
Canonical URLhttps://www.codechef.com
LanguageEnglish (default)
Twitter CardNot detected

Social Sharing Preview

5 fields

robots.txt (opens in a new tab)

106 rules
All bots 35 allowed · 71 disallowed
  • Allow/includes/*.js
  • Allow/misc/*.js
  • Allow/modules/*.js
  • Allow/profiles/*.js
  • Allow/scripts/*.js
  • Allow/sites/*.js
  • Allow/themes/*.js
  • Allow/includes/*.js
  • Allow/misc/*.css
  • Allow/modules/*.css
  • Allow/profiles/*.css
  • Allow/scripts/*.css
  • Allow/sites/*.css
  • Allow/themes/*.css
  • Allow/includes/*.png
  • Allow/misc/*.png
  • Allow/modules/*.png
  • Allow/profiles/*.png
  • Allow/scripts/*.png
  • Allow/sites/*.png
  • Allow/themes/*.png
  • Allow/includes/*.jpg
  • Allow/misc/*.jpg
  • Allow/modules/*.jpg
  • Allow/profiles/*.jpg
  • Allow/scripts/*.jpg
  • Allow/sites/*.jpg
  • Allow/themes/*.jpg
  • Allow/includes/*.jpeg
  • Allow/misc/*.jpeg
  • Allow/modules/*.jpeg
  • Allow/profiles/*.jpeg
  • Allow/scripts/*.jpeg
  • Allow/sites/*.jpeg
  • Allow/themes/*.jpeg
  • Disallow/includes/
  • Disallow/misc/
  • Disallow/modules/
  • Disallow/profiles/
  • Disallow/scripts/
  • Disallow/sites/
  • Disallow/themes/
  • Disallow/CHANGELOG.txt
  • Disallow/INSTALL.mysql.txt
  • Disallow/INSTALL.pgsql.txt
  • Disallow/install.php
  • Disallow/INSTALL.txt
  • Disallow/LICENSE.txt
  • Disallow/MAINTAINERS.txt
  • Disallow/update.php
  • Disallow/UPGRADE.txt
  • Disallow/admin
  • Disallow/comment/reply
  • Disallow/contact
  • Disallow/logout
  • Disallow/node/add
  • Disallow/search
  • Disallow/sets
  • Disallow/viewplaintext/*
  • Disallow/viewsolution/*
  • Disallow/recent/user
  • Disallow/rankings/*
  • Disallow/campus_chapter/*
  • Disallow/verify
  • Disallow/payments
  • Disallow/jobqueue
  • Disallow/moss/*
  • Disallow/lsh/*
  • Disallow/status/*
  • Disallow/problems/*
  • Disallow/tags/problems/*
  • Disallow/?q=admin
  • Disallow/?q=comment/reply
  • Disallow/?q=contact
  • Disallow/?q=logout
  • Disallow/?q=node/add
  • Disallow/?q=search
  • Disallow/?q=sets
  • Disallow/?q=todos
  • Disallow/?q=viewplaintext/*
  • Disallow/A
  • Disallow/B
  • Disallow/C
  • Disallow/D
  • Disallow/E
  • Disallow/F
  • Disallow/G
  • Disallow/H
  • Disallow/I
  • Disallow/J
  • Disallow/K
  • Disallow/L
  • Disallow/M
  • Disallow/N
  • Disallow/O
  • Disallow/P
  • Disallow/Q
  • Disallow/R
  • Disallow/S
  • Disallow/T
  • Disallow/U
  • Disallow/V
  • Disallow/W
  • Disallow/X
  • Disallow/Y
  • Disallow/Z

Sitemaps

1

Registration details RDAP / WHOIS

RegistrarAmazon Registrar, Inc.
Registered2005-05-08
Expires2026-11-24
Domain statusclient transfer prohibited
Nameserverslex.ns.cloudflare.com、vera.ns.cloudflare.com
DNSSECunsigned

DNS records

TypeNameValueTTLPriority
Acodechef.com104.26.4.157300—
Acodechef.com104.26.5.157300—
Acodechef.com172.67.75.52300—
AAAAcodechef.com2606:4700:20::681a:49d300—
AAAAcodechef.com2606:4700:20::681a:59d300—
AAAAcodechef.com2606:4700:20::ac43:4b34300—
MXcodechef.comaspmx.l.google.com30010
MXcodechef.comalt1.aspmx.l.google.com30020
MXcodechef.comalt2.aspmx.l.google.com30020
MXcodechef.comaspmx2.googlemail.com30030
MXcodechef.comaspmx3.googlemail.com30030
MXcodechef.comaspmx4.googlemail.com30030
MXcodechef.comaspmx5.googlemail.com30030
NScodechef.comlex.ns.cloudflare.com86400—
NScodechef.comvera.ns.cloudflare.com86400—
TXTcodechef.comahrefs-site-verification_04e642c9c46bc98dafe11b176cc6d5a993ed2012f33afb1ed8af25f0ba48d83560—
TXTcodechef.comahrefs-site-verification_6e889e2ee688c269d990d481ac87fd8b38f5dc138e8b6e0c14fba6c3db5784e260—
TXTcodechef.comgithub-verification=3Vz9HpXqx9n7sDhSFSRP3B3mnz8Hk9FhfXtA6BEZ60—
TXTcodechef.comgoogle-site-verification=WwEq-x8nLowpMamlJcCxqZF6q_GI65cLfnrBLlMjQ_k60—
TXTcodechef.comgoogle-site-verification=aofj5h49H6X_5kiZ0iwcqEBsQ292cAjxqXDolg7zO_Y60—
TXTcodechef.comgoogle-site-verification=c1sCqtaSYtvVbMlr-FHZR0M-TNm4455mXnp6BNqRuWI60—
TXTcodechef.comv=spf1 +a +mx a:webserver.codechef.com include:amazonses.com include:_spf.google.com include:mail.zohopayroll.com include:mail.zohopayroll.in ip4:54.227.160.146 -all60—
TXTcodechef.comzoho-verification=zb09737561.zmverify.zoho.com60—
DMARC_dmarc.codechef.comv=DMARC1;p=reject;rua=mailto:[email protected];ruf=mailto:[email protected];fo=1300—

TLS and certificates

AssessmentNormal configuration
Supported protocolsTLSv1.2、TLSv1.3
Negotiated protocolTLSv1.3
Certificate subjectcodechef.com
IssuerGoogle Trust Services
Valid until2026-10-21T19:35 · Remaining when checked: 48 days
Verification detailsCertificate trust: Passed · Hostname match: Passed

HTTP response headers

HeaderValue
content-typetext/html; charset=utf-8
cache-controlno-cache, must-revalidate, post-check=0, pre-check=0
servercloudflare
strict-transport-securitymax-age=300;
content-security-policyframe-ancestors https://apps.facebook.com;
x-frame-optionsALLOW-FROM https://apps.facebook.com
set-cookieRedacted

Identified technologies

jQueryGoogle Tag ManagerCloudflare

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