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Statistics
Stackoverflow.com
Last Updated: 31 Oct 2019 Update

Stackoverflow.com is registered with domain registrar Name.com, Inc.. The current Pagespeed score for homepage is 98 out of 100 for desktop version at 2019-10-31T04:00:11.676Z. Domain is probably hosted at server IP address 151.101.1.69. Our tool calculates it's estimated worth approximately around $ 22,227,957[for fun purpose only]. The domain content size is 115022 bytes. Time taken to load domain contents is 0.11387367 seconds. It's server is located in San Francisco city in California region, which is present in United States. It's http status is 200, and URL PORT is 443 and can be accessed using url protocol 'https'. This domain index page for mobile has a speed SLOW compared to other pages in Chrome User Experience report. Desktop version of this domain homepage speed is AVERAGE compared to other pages in Chrome User Experience report. This website doesn't have sitemap.xml file in it's root directory.

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HTML Heading Tag Counts
Number of h1 tags are: 1
h2 3
h3 6
h4 18
h5 4
h6 0
Stackoverflow.com Website Safety Stats
WOT [Trustworthiness] Excellent
WOT [Child Safety] Excellent
Stackoverflow.com SEO Stats
Source Stats
Mobile Pagespeed Score 89/100
Robots.txt Found
Sitemap.xml Not Found
Stackoverflow.com Social Engagement Counts
Source Stats
Facebook Share count 34,747
Facebook Reaction Count 18,081
Facebook Comment Count 10,196
Comment Pluggin Count 3
Tweets 3,549
Pinterest Pins Not Available
HTTP Header Response
HTTP/1.1 301 Moved Permanently Content-Length: 143 Content-Type: text/html; charset=utf-8 Location: https://stackoverflow.com/ X-Request-Guid: 0af35ca1-5d73-4371-b1cd-1d71ed24c2a9 Feature-Policy: microphone 'none'; speaker 'none' Content-Security-Policy: upgrade-insecure-requests; frame-ancestors 'self' https://stackexchange.com Accept-Ranges: bytes Date: Thu, 31 Oct 2019 04:00:10 GMT Via: 1.1 varnish Connection: keep-alive X-Served-By: cache-jfk8132-JFK X-Cache: MISS X-Cache-Hits: 0 X-Timer: S1572494410.106422,VS0,VE7 Vary: Fastly-SSL X-DNS-Prefetch-Control: off Set-Cookie: prov=e2b76be8-281e-af89-f1f2-791594c505b6; domain=.stackoverflow.com; expires=Fri, 01-Jan-2055 00:00:00 GMT; path=/; HttpOnly HTTP/1.1 200 OK Cache-Control: private Content-Length: 115072 Content-Type: text/html; charset=utf-8 X-Frame-Options: SAMEORIGIN X-Request-Guid: 80947808-1042-4dac-89e6-a8792e31b22b Strict-Transport-Security: max-age=15552000 Feature-Policy: microphone 'none'; speaker 'none' Content-Security-Policy: upgrade-insecure-requests; frame-ancestors 'self' https://stackexchange.com Accept-Ranges: bytes Date: Thu, 31 Oct 2019 04:00:10 GMT Via: 1.1 varnish Connection: keep-alive X-Served-By: cache-bwi5043-BWI X-Cache: MISS X-Cache-Hits: 0 X-Timer: S1572494410.174453,VS0,VE19 Vary: Fastly-SSL X-DNS-Prefetch-Control: off Set-Cookie: prov=6fe52039-0e8a-fac7-55e3-60dd2146a613; domain=.stackoverflow.com; expires=Fri, 01-Jan-2055 00:00:00 GMT; path=/; HttpOnly
Stackoverflow.com Domain Information
Domain Registrar: Name.com, Inc.
dateRegistration Date : 2003-12-26 15 years, 11 months & 22 days ago
dateLast Updated : 2019-01-11 11 months & 2 days ago
Stackoverflow.com Web Server Information
Host IP Address
ns-1033.awsdns-01.org 205.251.196.9
ns-358.awsdns-44.com 205.251.193.102
ns-cloud-e1.googledomains.com 216.239.32.110
ns-cloud-e2.googledomains.com 216.239.34.110
Stackoverflow.com DNS Information
Host Type Target
stackoverflow.comA151.101.1.69
stackoverflow.comA151.101.65.69
stackoverflow.comA151.101.129.69
stackoverflow.comA151.101.193.69
stackoverflow.comNSns-358.awsdns-44.com
stackoverflow.comNSns-1033.awsdns-01.org
stackoverflow.comNSns-cloud-e1.googledomains.com
stackoverflow.comNSns-cloud-e2.googledomains.com
stackoverflow.comSOA Mname: ns-1033.awsdns-01.org
Rname: awsdns-hostmaster.amazon.com
Serial: 1
Refresh: 7200
Retry: 900
Expire: 1209600
Minimum-ttl: 86400
stackoverflow.comMXaspmx.l.google.com
Priority: 1
stackoverflow.comMXalt3.aspmx.l.google.com
Priority: 10
stackoverflow.comMXalt4.aspmx.l.google.com
Priority: 10
stackoverflow.comMXalt1.aspmx.l.google.com
Priority: 5
stackoverflow.comMXalt2.aspmx.l.google.com
Priority: 5
stackoverflow.comTXTMS=ms52592611
stackoverflow.comTXTgoogle-site-verification=ctogLnZNAdc_CXq8yOhODMLpmugGynjxKecKHDz4oL8
stackoverflow.comTXTgoogle-site-verification=o3EMam8yBGo1yEjyybIiZcOunGHOQKpo8JmOtp9n1BU
stackoverflow.comTXTgoogle-site-verification=rdWtMbplKjbRHGr2dNONfwkqithlUvjr3u6i8QEz_mo
stackoverflow.comTXTv=spf1 ip4:198.252.206.0/24 ip4:192.111.0.0/24 ip4:52.38.191.241 ip4:35.190.247.0/24 ip4:64.233.160.0/19 ip4:66.102.0.0/20 ip4:66.249.80.0/20 ip4:72.14.192.0/18 ip4:74.125.0.0/16 ip4:108.177.8.0/21 ip4:173.194.0.0/16 include:_spf1.stackoverflow.com ~all

Stackoverflow.com Google PageSpeed Insights

Title Mobile Desktop
Eliminate render-blocking resources
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Potential savings of 1,200 ms Potential savings of 240 ms
First Meaningful Paint
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Potential savings of 1,200 ms Potential savings of 240 ms
Uses efficient cache policy on static assets
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38 resources found 40 resources found
Server response times are low (TTFB)
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Root document took 100 ms Root document took 60 ms
Properly size images
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Speed Index
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3.5 s 0.9 s
Defer unused CSS
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Potential savings of 90 KB Potential savings of 90 KB
Time to Interactive
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4.8 s 0.9 s
Estimated Input Latency
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10 ms 10 ms
First CPU Idle
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4.4 s 0.9 s
Avoids enormous network payloads
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Total size was 381 KB Total size was 393 KB
Minimizes main-thread work
Consider reducing the time spent
parsing, compiling and executing JS.
You may find delivering
smaller JS payloads helps with this.
2.3 s 0.5 s
Serve images in next-gen formats
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Minimize Critical Requests Depth
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9 chains found 9 chains found
Avoids an excessive DOM size
Learn about Style Calculation
Learn more layout Reflows
Learn more about Dom Size
813 elements 813 elements
Avoid multiple page redirects
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Potential savings of 630 ms Potential savings of 190 ms
First Input Display
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AVERAGE FAST
JavaScript execution time
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0.7 s 0.0 s
Stackoverflow.com SSL Information
Subject: *.stackexchange.com
Certificate Issuer: Organisation:- Lets Encrypt
Common Name:- Lets Encrypt Authority X3
Country:- US
Valid from: 25:09:2019
Valid to: 24:12:2019
Signature Type SN: RSA-SHA256
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