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Whois & Analysis for stackoverflow.com

Oct 29, 2019 12:46 pm UTC

DOMAIN OWNER WHOIS

The owner's whois contact information is public.
• Organization
Stack Exchange, Inc.
• Address
110 William St , Floor 28
• City
New York
• Zip Code
10038
• State
NY
• Country Code
US
• Phone Number
• Domain Registrar
Desktop screen Desktop screenshot for stackoverflow.com
86

9 criteria passed
2 criteria to solve

PERFORMANCE OPPORTUNITIES

Set a meta content-type (or meta charset) for your website.
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Fill the missing alt attributes on your images.
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OVERVIEW

• Domain Owner
Stack Exchange, Inc. See more
• Category
Technology & Computing
• Online since
December 26, 2003 Explore Wayback Machine
• Age
20 years, 10 months, 25 days
• Alexa Rank
#38, stackoverflow.com is in the world's top 100 websites!

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TECHNICAL SEO & SECURITY

SSL Certificate
This website is not SSL secured (HTTPS), the certificate issued by Let's Encrypt has expired on December 24, 2019.
Title Tag
Stack Overflow - Where Developers Learn, Share, & Build Careers
Length: 67 (recommended: 10 to 70)
Meta Description
Stack Overflow is the largest, most trusted online community for developers to learn, share​ ​their programming ​knowledge, and build their careers.
Length: 154 (recommended: 50 to 160)
Google preview
Desktop Version

Stack Overflow - Where Developers Learn, Share, & Build Careers

https://stackoverflow.com

Stack Overflow is the largest, most trusted online community for developers to learn, share​ ​their programming ​knowledge, and build their careers.

Mobile Version

https://stackoverflow.com

Stack Overflow - Where Developers Learn, Share, & Build Careers

Stack Overflow is the largest, most trusted online community for developers to learn, share​ ​their programming ​knowledge, and bu...

Encoding
No language/character encoding is specified
URL Resolve

Great, a redirect is in place to redirect traffic from your non-preferred domain. All versions of your page point to the same URL.

URL Parameters
Great, the domain URLs look clean.
Attribute Value
viewport width=device-width, height=device-height, initial-scale=1.0, minimum-scale=1.0

SEMANTIC ANALYSIS

The results of our semantic analysis are shown below using the website's language.

They are the main concepts covered by stackoverflow.com.

Each concept has a confidence score. The higher it is, the more important the topic is relative to the page.

Topics
Stack Overflow Confidence: 88% Arrow up

Stack Overflow is a privately held website, the flagship site of the Stack Exchange Network, created in 2008 by Jeff Atwood and Joel Spolsky.

It was created to be a more open alternative to earlier question and answer sites such as Experts-Exchange.

The name for the website was chosen by voting in April 2008 by readers of Coding Horror, Atwood's popular programming blog.

Virtual community Confidence: 73% Arrow up

A virtual community is a social network of individuals who interact through specific social media, potentially crossing geographical and political boundaries in order to pursue mutual interests or goals.

Some of the most pervasive virtual communities are online communities operating under social networking services.

Knowledge Confidence: 72% Arrow up

Knowledge is a familiarity, awareness or understanding of someone or something, such as facts, information, descriptions, or skills, which is acquired through experience or education by perceiving, discovering, or learning.

Computer programming Confidence: 68% Arrow up

Computer programming (often shortened to programming) is a process that leads from an original formulation of a computing problem to executable computer programs.

Programming involves activities such as analysis, developing understanding, generating algorithms, verification of requirements of algorithms including their correctness and resources consumption, and implementation (commonly referred to as coding) of algorithms in a target programming language.

Source code is written in one or more programming languages.

The purpose of programming is to find a sequence of instructions that will automate performing a specific task or solving a given problem.

The process of programming thus often requires expertise in many different subjects, including knowledge of the application domain, specialized algorithms, and formal logic.

File sharing Confidence: 66% Arrow

WEBSITE SPEED

stackoverflow.com website speed is fast. Page speed is important for visitors and search engines.

Get insights to improve your page loading time.

Page Loading Time

1.2s

This domain loads at the median speed of 1.2 seconds.

Speed Percentile

72%

stackoverflow.com is faster than approximately 72 percent of the web. Your website page speed needs to be as fast as you can make it, without compromising the customer experience.

A good goal to achieve is a loading time of 2 seconds on desktop and mobile devices.

PAGESPEED INSIGHTS

Page on which speed is tested live:

Chrome User Experience Report Results

Lighthouse Results

TRAFFIC

This website is ranked #38 by Alexa.

This rank is traffic based. The lower the rank is, the better the domain is ranked.

Daily visitors by country

  • stackoverflow.com daily visitors distribution - Total: 20 countries
  • Flag for IndiaIndia (18.3%)
  • Flag for United States of AmericaUnited States of America (21.4%)
  • Flag for Iran (Islamic Republic of)Iran (Islamic Republic of) (5.1%)
  • Flaf icon for other countryOthers (55.2%)

Traffic country ranks

Country Rank
Flag for Viet NamViet Nam #25
Flag for IndiaIndia #13
Flag for IndonesiaIndonesia #112
Flag for EgyptEgypt #57
Flag for SingaporeSingapore #21

LAYOUT

Doctype HTML5 Arrow Responsive website, mobile-friendly. Arrow

Mobile Rendering

This website seems to be optimized for Mobile Visitors.

Phone
How stackoverflow.com looks like on a mobile device such as an iPhone.

Tablet
How stackoverflow.com looks like on a tablet such as an iPad.

Main colors used

These are the main HTML color codes used by this website. Arrow
  • 35% #ffffff
  • 33% #ffd010
  • 9% #e0b010
  • 8% #f0c010
  • 5% #f0f0f0
  • 2% #fffff0
  • 1% #fff0f0
  • 1% #f0d050
  • 1% #e0d0c0
  • 1% #f0f0d0
  • 0% #fff0c0
  • 0% #705010

Text/code ratio

stackoverflow.com's text/code ratio is 6.96%. It's a bit low. Consider raising it by adding more text content of value for your visitors, or keeping your code clean.
Text / Code Ratio 6.96%

A good text to HTML ratio is anywhere from 25 to 70%.

This percentage refers to the visible text ratio, as opposed to HTML elements, image tags and other non-visible information.

Main HTML tags

Headings Arrow up

Great, we found headings on this page.

  • <H1> 1
  • <H2> 3
  • <H3> 6
  • <H4> 18
  • <H5> 4
  • <H6> 0
<H1>
Top level heading
We <3 people who code
<H2>
2nd level heading
For developers, by developers
For businesses, by developers
Unlock siloed knowledge with stack overflow for teams
<H3>
3rd level heading
Current community
Your communities
More stack exchange communities
Questions are everywhere, answers are on stack overflow
Learn and grow with stack overflow
<H4>
4th level heading
Public q&a
Private q&a
Browse jobs
Basic
Business
<H5>
5th level heading
Stack overflow
Products
Company
Stack exchange network
Alt attributes Arrow up

We found 30 images on this website.
30 ALT attributes are missing on your image tags. The issue affects 28 actual different images that could be loaded more than once in your page.

Image Image URL Occurrences
Image with missing alt attribute found on stackoverflow.com https://cdn.sstatic.net/Img/home/public-qa.svg?v=d82acaa7df9f 1
Image with missing alt attribute found on stackoverflow.com https://cdn.sstatic.net/Img/home/private-qa.svg?v=2c1de180b6d7 1
Image with missing alt attribute found on stackoverflow.com https://cdn.sstatic.net/Img/home/jobs.svg?v=931d6c0863ee 1
Image with missing alt attribute found on stackoverflow.com https://cdn.sstatic.net/Img/home/private-questions.svg?v=a4f1cfb08f7e 1
Image with missing alt attribute found on stackoverflow.com https://cdn.sstatic.net/Img/home/find-candidate.svg?v=9099aa106ad3 2

Alternative text allows you to add a description to an image.

Google rely on alternative text attributes to determine relevance to a search query. Alternative text also makes an image more likely to appear in a Google image search.

It looks like you're missing alternative text for 30 images on stackoverflow.com. Check your website to make sure it's specified for each image on the page.

SOCIAL MEDIA PRESENCE

This is an overview of your homepage shares on social networks.

Congratulations, your website is highly shared on social media! It's an excellent signal for your overall SEO strategy.

  • Facebook iconFacebook
  • Total Engagement 12.983
  • Likes 4.759
  • Shares 5.791
  • Comments 2.432

DOMAIN REGISTRAR

Domain Registrar NAME.COM, INC.
Registration Date 12/26/2003 20 years, 10 months, 25 days ago
Last Modified 01/11/2019 5 years, 10 months, 9 days ago
Expiration Date 02/02/2020 Expired
Nameservers Arrow up
Host IP Address Country
ns-1033.awsdns-01.org 205.251.196.9 Flag for United StatesUnited States
ns-358.awsdns-44.com 205.251.193.102 Flag for United StatesUnited States
ns-cloud-e1.googledomains.com 216.239.32.110 Flag for United StatesUnited States

SERVER DETAILS

Server map
  • Service Provider (ISP)
  • Fastly
  • IP Address
  • 151.101.1.69
  • Country
  • Flag for United StatesUnited States
  • Region
  • Virginia , Ashburn
  • Latitude and Longitude
  • 39.0438 : -77.4874
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