kotlin-lang.org Kotlin-lang.org

   
Kotlin Programming Language

Domain Summary

What IP addresses does Kotlin-lang.org resolve to?

• Kotlin-lang.org resolves to the IP addresses 34.78.67.165.

Where are Kotlin-lang.org servers located in?

• Kotlin-lang.org has servers located in Brussels, Brussels Capital, 1000, Belgium.

kotlin-lang.org Profile

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.
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What technologies does kotlin-lang.org use?

These are the technologies used at kotlin-lang.org. kotlin-lang.org has a total of 6 technologies installed in 5 different categories.
CDN
Amazon Cloudfront Amazon Cloudfront
Miscellaneous
Amazon S3 Amazon S3
Open Graph Open Graph
Tag Managers
Google Tag Manager Google Tag Manager
A/B Testing
Optimizely Optimizely
PaaS
Amazon Web Services Amazon Web Services

kotlin-lang.org Traffic Analysis

There's no enough data about kotlin-lang.org traffic.
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Bounce Rate n/a
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Domain:
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Rank:
(Rank based on keywords, cost and organic traffic)
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Organic Keywords:
(Number of keywords in top 20 Google SERP)
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Organic Traffic:
(Number of visitors coming from top 20 search results)
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Organic Cost:
((How much need to spend if get same number of visitors from Google Adwords)
  $0.00
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Ad Experience Report ▼

Summary of the ad experience rating of a website for a specific platform.

Mobile summary

Root domain:
kotlin-lang.org
Ad filtering:
(Chrome is not filtering ads on your site.)
Off
Status:
(The status of the site that is reviewed for the Better Ads Standards.)
Not reviewed

Desktop summary

Root domain:
kotlin-lang.org
Ad filtering:
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Off
Status:
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Abusive Experience Report ▼

Summary of the abusive experience rating of a website.
Root domain:
kotlin-lang.org
Enforcement:
(Chrome is not preventing your site from opening new windows or tabs.)
Off
Status:
(The status of the site reviewed for the abusive experiences.)
Not reviewed

Where is kotlin-lang.org hosted? ▼

Kotlin-lang.org may be hosted in multiple data centers distributed in different locations around the world. This is probably just one of them.
Server IP:
34.78.67.165
ASN:
AS396982 
ISP:
Google LLC 
Server Location:
Brussels
Brussels Capital, BRU
1000
Belgium, BE
 

Other sites hosted on 34.78.67.165

How fast does kotlin-lang.org load? ▼

The average loading time of kotlin-lang.org is 289 ms. The Desktop speed index is 0 and mobile speed index is 39.
Average Load Time:
289 ms

Page Speed (Google PageSpeed Insights) - Mobile

39
0-49 50-89 90-100 i

Field Data

Over the last 30 days, the field data shows that this page has a AVERAGE speed compared to other pages in the Chrome User Experience Report.We are showing the 90th percentile of FCP and the 95th percentile of FID.

Cumulative Layout Shift (CLS)8ms 0% of loads for this page have a fast (<0.01s) Cumulative Layout Shift (CLS) 79% 18% of loads for this page have an average (0.01s ~ 0.025s) Cumulative Layout Shift (CLS) 18% 1% of loads for this page have a slow (>0.025s) Cumulative Layout Shift (CLS) 1%
Time To First Byte (TTFB)1.1s 0% of loads for this page have a fast (<800s) Time To First Byte (TTFB) 56% 35% of loads for this page have an average (800s ~ 1800s) Time To First Byte (TTFB) 35% 8% of loads for this page have a slow (>1800s) Time To First Byte (TTFB) 8%
First Contentful Paint (FCP)2.5s 0% of loads for this page have a fast (<1.8s) First Contentful Paint (FCP) 58% 26% of loads for this page have an average (1.8s ~ 3s) First Contentful Paint (FCP) 26% 14% of loads for this page have a slow (>3s) First Contentful Paint (FCP) 14%
First Input Delay (FID)0 0% of loads for this page have a fast (<0ms) First Input Delay (FID) 0% 0% of loads for this page have an average (0ms ~ 0ms) First Input Delay (FID) 0% 0% of loads for this page have a slow (>0ms) First Input Delay (FID) 0%
Interactive To Next Paint (INP)332ms 0% of loads for this page have a fast (<200s) Interactive To Next Paint (INP) 49% 37% of loads for this page have an average (200s ~ 500s) Interactive To Next Paint (INP) 37% 13% of loads for this page have a slow (>500s) Interactive To Next Paint (INP) 13%
Largest Contentful Paint (LCP)3.4s 0% of loads for this page have a fast (<2500s) Largest Contentful Paint (LCP) 58% 23% of loads for this page have an average (2500s ~ 4000s) Largest Contentful Paint (LCP) 23% 17% of loads for this page have a slow (>4000s) Largest Contentful Paint (LCP) 17%

Origin Data

All pages served from this origin have an SLOW speed compared to other pages in the Chrome User Experience Report. over the last 30 days.To view suggestions tailored to each page, analyze individual page URLs.

Cumulative Layout Shift (CLS)13ms 64% of loads for this page have a fast (<0.01s) Cumulative Layout Shift (CLS) 64% 22% of loads for this page have an average (0.01s ~ 0.025s) Cumulative Layout Shift (CLS) 22% 12% of loads for this page have a slow (>0.025s) Cumulative Layout Shift (CLS) 12%
Time To First Byte (TTFB)911ms 67% of loads for this page have a fast (<0.8s) Time To First Byte (TTFB) 67% 26% of loads for this page have an average (0.8s ~ 1.8s) Time To First Byte (TTFB) 26% 6% of loads for this page have a slow (>1.8s) Time To First Byte (TTFB) 6%
First Contentful Paint (FCP)3.2s 51% of loads for this page have a fast (<1.8s) First Contentful Paint (FCP) 51% 21% of loads for this page have an average (1.8s ~ 3s) First Contentful Paint (FCP) 21% 27% of loads for this page have a slow (>3s) First Contentful Paint (FCP) 27%
First Input Delay (FID)0 0% of loads for this page have a fast (<0ms) First Input Delay (FID) 0% 0% of loads for this page have an average 0ms ~ 0ms) First Input Delay (FID) 0% 0% of loads for this page have a slow (>0ms) First Input Delay (FID) 0%
Interactive To Next Paint (INP)439ms 39% of loads for this page have a fast (<0.2s) Interactive To Next Paint (INP) 39% 38% of loads for this page have an average (0.2s ~ 0.5s) Interactive To Next Paint (INP) 38% 21% of loads for this page have a slow (>0.5s) Interactive To Next Paint (INP) 21%
Largest Contentful Paint (LCP)3.7s 58% of loads for this page have a fast (<2.5s)Largest Contentful Paint (LCP) 58% 20% of loads for this page have an average (2.5s ~ 4s)Largest Contentful Paint (LCP) 20% 21% of loads for this page have a slow (>4s)Largest Contentful Paint (LCP) 21%

Lab Data

INP by phase  
Start investigating with the longest phase. To reduce processing duration, , often JS. Delays can be minimized optimize the main-thread costs
Total Blocking Time 760 ms
Sum of all time periods between FCP and Time to Interactive, when task length exceeded 50ms, expressed in milliseconds. Learn more about the Total Blocking Time metric
Largest Contentful Paint 19.4 s
Largest Contentful Paint marks the time at which the largest text or image is painted. Learn more about the Largest Contentful Paint metric
LCP request discovery  
Optimize LCP by making the LCP image from the HTML immediately, and discoverable avoiding lazy-loading
Time to Interactive 19.9 s
Time to Interactive is the amount of time it takes for the page to become fully interactive. Learn more about the Time to Interactive metric
Largest Contentful Paint image was not lazily loaded  
Above-the-fold images that are lazily loaded render later in the page lifecycle, which can delay the largest contentful paint. Learn more about optimal lazy loading
Preload Largest Contentful Paint image  
If the LCP element is dynamically added to the page, you should preload the image in order to improve LCP. Learn more about preloading LCP elements
Lazy load third-party resources with facades  
Some third-party embeds can be lazy loaded. Consider replacing them with a facade until they are required. Learn how to defer third-parties with a facade
Speed Index 8.4 s
Speed Index shows how quickly the contents of a page are visibly populated. Learn more about the Speed Index metric
Render blocking requests  
Requests are blocking the page's initial render, which may delay LCP. can move these network requests out of the critical path. Deferring or inlining
Preconnect to required origins  
Consider adding `preconnect` or `dns-prefetch` resource hints to establish early connections to important third-party origins. Learn how to preconnect to required origins
First Contentful Paint 7.2 s
First Contentful Paint marks the time at which the first text or image is painted. Learn more about the First Contentful Paint metric
Duplicated JavaScript  
Remove large, duplicate JavaScript modules from bundles to reduce unnecessary bytes consumed by network activity.
First Meaningful Paint  
First Meaningful Paint measures when the primary content of a page is visible. Learn more about the First Meaningful Paint metric
Max Potential First Input Delay 330 ms
The maximum potential First Input Delay that your users could experience is the duration of the longest task. Learn more about the Maximum Potential First Input Delay metric

Does kotlin-lang.org use compression? ▼

Website compression is the process of reducing the size of website files, such as HTML, CSS, JavaScript, and image files, to improve website performance and load times. Compressing website files can significantly reduce the amount of data that needs to be transferred from the server to the user's browser, resulting in faster page load times and improved user experience. Files on kotlin-lang.org are reduced by 63%.
kotlin-lang.org use gzip compression.
Original size: 248.29 KB
Compressed size: 90.85 KB
File reduced by: 157.45 KB (63%)

Google Safe Browsing ▼

Google Safe Browsing is a service provided by Google that helps protect users from visiting websites that may contain malicious or harmful content, such as malware, phishing attempts, or deceptive software.
This site is not currently listed as suspicious

MyWot.com Reputation Ratings

MyWOT (short for "My Web of Trust") is a web-based reputation and rating service that provides users with information about the trustworthiness and safety of websites.
Status:
  SAFE

SSL Checker - SSL Certificate Verify ▼

An SSL (Secure Sockets Layer) certificate is a digital certificate that establishes a secure encrypted connection between a web server and a user's web browser. It provides authentication and encryption, ensuring that data transmitted between the server and the browser remains private and protected. kotlin-lang.org supports HTTPS.
 kotlin-lang.org supports HTTPS
     
Verifying SSL Support. Please wait...
Common Name: kotlinlang.org
Organization:
Location:
Issuer: Amazon RSA 2048 M02
Valid from: Oct 7 00:00:00 2024 GMT
Valid until: Nov 4 23:59:59 2025 GMT
Authority: CA:FALSE
Keysize: 2048 Bits
Common Name: Amazon RSA 2048 M02
Organization: Amazon
Location: US
Issuer: Amazon Root CA 1
Valid from: Aug 23 22:25:30 2022 GMT
Valid until: Aug 23 22:25:30 2030 GMT
Authority: CA:TRUE
Keysize: 2048 Bits
Common Name: Amazon Root CA 1
Organization: Amazon
Location: US
Issuer: Starfield Services Root Certificate Authority - G2
Valid from: May 25 12:00:00 2015 GMT
Valid until: Dec 31 01:00:00 2037 GMT
Authority: CA:TRUE
Keysize: 2048 Bits

Verify HTTP/2 Support ▼

HTTP/2 (Hypertext Transfer Protocol version 2) is a major revision of the HTTP protocol, which is the foundation of data communication on the World Wide Web. It was developed as an improvement over the previous HTTP/1.1 version to enhance web performance and efficiency.
 kotlin-lang.org supports HTTP/2
     
Verifying HTTP/2.0 Support. Please wait...

Http Header ▼

HTTP headers are extra portions of records despatched among a consumer (which include an internet browser) and a server at some stage in an HTTP request or response. They offer instructions, metadata, or manipulate parameters for the conversation among the consumer and server. 
date: Tue, 17 Jun 2025 00:21:02 GMT
content-type: text/html; charset=utf-8
content-length: 58
location: https://kotlinlang.org/
cache-control: public, max-age=7200, must-revalidate
expires: Tue, 17 Jun 2025 02:21:02 GMT
strict-transport-security: max-age=15724800; includeSubDomains
vary: Origin

HTTP/2 200 
content-type: text/html; charset=utf-8
date: Tue, 17 Jun 2025 00:21:03 GMT
last-modified: Mon, 16 Jun 2025 10:48:47 GMT
etag: W/"ea70e44bffda06738a386499c190c219"
x-amz-server-side-encryption: AES256
x-amz-meta-mtime: 1750069628
server: AmazonS3
content-encoding: gzip
vary: Accept-Encoding
x-cache: Miss from cloudfront
via: 1.1 6a5eda21ba47fc7b4d3ca7ac7a9ac958.cloudfront.net (CloudFront)
x-amz-cf-pop: FRA60-P10
x-amz-cf-id: FTPRBKah6hnVVviZJyAiIkQTytwCj-VDLVG6le9lX98FWppJRNLdTA==
x-xss-protection: 1; mode=block
x-frame-options: SAMEORIGIN
referrer-policy: same-origin

DNS Lookup ▼

DNS entries (Domain Name System) are a critical component of the Internet infrastructure. They act as directories that translate human-readable domain names (such as example.com) to machine-readable IP addresses. DNS records are stored on DNS servers and help forward internet traffic efficiently.
Type Ip Target/Txt TTL
A 34.78.67.165 60
NS ns-2.awsdns-00.com 86400
NS ns-2039.awsdns-62.co.uk 86400
NS ns-658.awsdns-18.net 86400
NS ns-1456.awsdns-54.org 86400
SOA 900
Mname ns-2.awsdns-00.com
Rname awsdns-hostmaster.amazon.com
Serial Number 2017061501
Refresh 7200
Retry 900
Expire 1209600
Minimum TTL 86400
TXT v=spf1 -all 300

Whois Lookup ▼

Domain WHOIS is a public database that provides information about domain names, including registered owners, contact information, domain registrars, registration and expiration dates, name servers, and other relevant information. Domain registration for this website began on July 21, 2014 and will expire on July 21, 2025 if not renewed. This website is now assigned through the registrar Squarespace Domains II LLC. The WHOIS data for this website's domain was last updated on July 6, 2024.
Domain Created:
2014-07-21
Domain Expires:
2025-07-21
Domain Updated:
2024-07-06
Domain Age:
10 years 10 months 27 days
Domain Registrar:
Squarespace Domains II LLC
Domain Owner:
Kotlin Foundation
WhoIs:
 

Domain Name: kotlin-lang.org
Registry Domain ID: 4edce875926f4d5b9f2fd4ede7b0944d-LROR
Registrar WHOIS Server: whois.squarespace.domains
Registrar URL: https://domains2.squarespace.com
Registrar: Squarespace Domains II LLC
Registrar IANA ID: 895
Registrar Abuse Contact Email: email
Registrar Abuse Contact Phone: +1.646-693-5324
Reseller:
Updated Date: 2024-07-06T10:18:06.789994Z
Creation Date: 2014-07-21T07:20:20.355Z
Registrar Registration Expiration Date: 2025-07-21T07:20:20.355Z
Domain Status: client transfer prohibited http://www.icann.org/epp#client transfer prohibited
Domain Status: client delete prohibited http://www.icann.org/epp#client delete prohibited
Registry Registrant ID:
Registrant Name: REDACTED FOR PRIVACY
Registrant Organization: Kotlin Foundation
Registrant Street: REDACTED FOR PRIVACY
Registrant City: REDACTED FOR PRIVACY
Registrant State/Province: NJ
Registrant Postal Code: REDACTED FOR PRIVACY
Registrant Country: US
Registrant Phone: REDACTED FOR PRIVACY
Registrant Phone Ext:
Registrant Fax: REDACTED FOR PRIVACY
Registrant Fax Ext:
Registrant Email: https://domains.squarespace.com/whois-contact-form
Registry Admin ID:
Admin Name: REDACTED FOR PRIVACY
Admin Organization: Kotlin Foundation
Admin Street: REDACTED FOR PRIVACY
Admin City: REDACTED FOR PRIVACY
Admin State/Province: NJ
Admin Postal Code: REDACTED FOR PRIVACY
Admin Country: US
Admin Phone: REDACTED FOR PRIVACY
Admin Phone Ext:
Admin Fax: REDACTED FOR PRIVACY
Admin Fax Ext:
Admin Email: https://domains.squarespace.com/whois-contact-form
Registry Tech ID:
Tech Name: REDACTED FOR PRIVACY
Tech Organization: Kotlin Foundation
Tech Street: REDACTED FOR PRIVACY
Tech City: REDACTED FOR PRIVACY
Tech State/Province: NJ
Tech Postal Code: REDACTED FOR PRIVACY
Tech Country: US
Tech Phone: REDACTED FOR PRIVACY
Tech Phone Ext:
Tech Fax: REDACTED FOR PRIVACY
Tech Fax Ext:
Tech Email: https://domains.squarespace.com/whois-contact-form
Name Server: ns-2.awsdns-00.com
Name Server: ns-1456.awsdns-54.org
Name Server: ns-2039.awsdns-62.co.uk
Name Server: ns-658.awsdns-18.net
DNSSEC: unsigned
URL of the ICANN WHOIS Data Problem Reporting System: http://wdprs.internic.net/
The registration data available in this service is limited.  Additional data may be available at https://lookup.icann.org.
****** Last update of WHOIS database: 2024-07-06T10:18:06.789994Z