kotlinlang.org

.org crawl

First seen 2026-04-11 · Last seen 2026-05-19 · ok HTTP/1.1 200 2104 ms crawled 2026-05-19

US · 108.156.22.114 · AS16509 Amazon.com, Inc.

Reputation 95/100 weak security headers

Classifying

HTML metadata

Title: Kotlin Programming Language
Description: Kotlin is a concise and multiplatform programming language by JetBrains. Enjoy coding and build server-side, mobile, web, and desktop applications efficiently.
Language: en
Canonical: https://kotlinlang.org/

Open Graph

url: https://kotlinlang.org/
title: Kotlin Programming Language
site name: Kotlin
description: Kotlin is a concise and multiplatform programming language by JetBrains. Enjoy coding and build server-side, mobile, web, and desktop applications efficiently.

Technology

CDN: Amazon CloudFront
Server: AmazonS3
CMS: Next.js

Analytics

Google Tag Manager

Fonts

Google Fonts

Third-party hosts loaded (5)

cdn.optimizely.com×1
fonts.googleapis.com×1
fonts.gstatic.com×1
img.youtube.com×1
www.googletagmanager.com×1

Social

Registration

Registrar

Squarespace Domains II LLC

Created

2013-09-30

Expires

2026-09-30 133 days left

Updated

2025-09-22

Name servers

ns-1287.awsdns-32.org
ns-163.awsdns-20.com
ns-1638.awsdns-12.co.uk
ns-953.awsdns-55.net

DNS records live

NS

ns-1287.awsdns-32.org
ns-163.awsdns-20.com
ns-1638.awsdns-12.co.uk
ns-953.awsdns-55.net

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

facebook-domain-verification=fz49z7zr0ycqj7f9qvli45x3wqzfrh
google-site-verification=Kldj7OgchCyGYVHwynlh6tOmYdmPHPVno2VxUNeW0TI

Email authentication strong

SPF

v=spf1 include:_spf.google.com a:mkto-mailer.jetbrains.com -all

strict (-all)

DMARC

v=DMARC1; p=reject; adkim=s; aspf=s;

policy: reject (enforced)

DKIM

google: v=DKIM1; k=rsa; p=MIGfMA0GCSqGSIb3DQEBAQUAA4GNADCBiQKBgQCvCB6RR8mwRD42m0Hdg07a4NJrWuVF3tcyo+sCeC27QO1VMiACu14JUzu6zDP6TK9HroceQrZgL5sF0XyLc5…

selectors probed

Certificate (current)

Amazon RSA 2048 M03

from 2025-09-06 to 2026-10-05

Expires in 138 days

Full certificate history on crt.sh ↗

HTTP security headers

Header hygiene 45/100 Checked live page: https://kotlinlang.org/

present

x-frame-options
referrer-policy

findings

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

Header values

referrer-policy: strict-origin-when-cross-origin
x-frame-options: SAMEORIGIN