|Site title||Stack Overflow - Where Developers Learn, Share, & Build Careers|
|Description||Stack Overflow is the largest, most trusted online community for developers to learn, share\342\200\213 \342\200\213their programming \342\200\213knowledge, and build their careers.|
|Date first seen||November 1999|
|Netcraft Risk Rating||0/10|
|IP address||220.127.116.11 (VirusTotal)|
|IPv6 address||Not Present|
|Organisation||Stack Exchange, Inc., 110 William St , Floor 28, New York, 10038, United States|
|Top Level Domain||Commercial entities (.com)|
|DNS Security Extensions||unknown|
|0.0.0.0-255.255.255.255||N/A||IANA-BLK||The whole IPv4 address space|
|↳ 18.104.22.168-22.214.171.124||Netherlands||RIPE-ERX-151||RIPE Network Coordination Centre|
|↳ 126.96.36.199-188.8.131.52||United States||SKYCA-3||Fastly|
|↳ 184.108.40.206||United States||SKYCA-3||Fastly|
This is not a HTTPS site. If you're looking for SSL/TLS information try the HTTPS site report.
|Netblock owner||IP address||OS||Web server||Last seen|
|Fastly PO Box 78266 San Francisco CA US 94107||220.127.116.11||Linux||Microsoft-IIS/10.0||4-Jul-2020|
|Fastly PO Box 78266 San Francisco CA US 94107||18.104.22.168||Linux||Microsoft-IIS/10.0||2-Jul-2020|
|Fastly PO Box 78266 San Francisco CA US 94107||22.214.171.124||Linux||Microsoft-IIS/10.0||30-Jun-2020|
|Fastly PO Box 78266 San Francisco CA US 94107||126.96.36.199||Linux||Microsoft-IIS/10.0||26-Jun-2020|
|Fastly PO Box 78266 San Francisco CA US 94107||188.8.131.52||Linux||Microsoft-IIS/10.0||24-Jun-2020|
|Fastly PO Box 78266 San Francisco CA US 94107||184.108.40.206||Linux||Microsoft-IIS/10.0||22-Jun-2020|
|Fastly PO Box 78266 San Francisco CA US 94107||220.127.116.11||Linux||Microsoft-IIS/10.0||18-Jun-2020|
|Fastly PO Box 78266 San Francisco CA US 94107||18.104.22.168||Linux||Microsoft-IIS/10.0||16-Jun-2020|
|Fastly PO Box 78266 San Francisco CA US 94107||22.214.171.124||Linux||Microsoft-IIS/10.0||14-Jun-2020|
|Fastly PO Box 78266 San Francisco CA US 94107||126.96.36.199||Linux||Microsoft-IIS/10.0||12-Jun-2020|
Sender Policy Framework
A host's Sender Policy Framework (SPF) describes who can send mail on its behalf. This is done by publishing an SPF record containing a series of rules. Each rule consists of a qualifier followed by a specification of which domains to apply this qualifier to. For more information please see open-spf.org.
DMARC (Domain-based Message Authentication, Reporting and Conformance) is a mechanism for domain owners to indicate how mail purporting to originate from their domain should be authenticated. It builds on SPF and DKIM, providing a method to set policy and to give reporting of failures. For more information please see dmarc.org.
Raw DMARC record:
|p=reject||Requested handling policy||Reject: emails that fail the DMARC mechanism check should be rejected. Rejection SHOULD occur during the SMTP transaction.|
|sp=reject||Requested handling policy for subdomains||Reject: emails that fail the DMARC mechanism check should be rejected. Rejection SHOULD occur during the SMTP transaction.|
|pct=100||Sampling rate||100% of messages from the Domain Owner's mail stream should have DMARC applied.|
|rua=mailto:email@example.com||Reporting URI(s) for aggregate firstname.lastname@example.org|
|ruf=mailto:email@example.com||Reporting URI(s) for failure firstname.lastname@example.org|
|fo=1||Failure reporting options||Generate a DMARC failure report if any underlying authentication mechanism failed to produce an aligned "pass" result.|
Site Technology (fetched 28 days ago)
Any network related service or technology.
A web accelerator is a proxy server that reduces web site access times.
Includes all the main technologies that Netcraft detects as running on the server such as PHP.
Client-Side Scripting Frameworks
Frameworks or libraries allow for easier development of applications by providing an Application Program Interface (API) or a methodology to follow whilst developing.
Content Delivery Network
A content delivery network or content distribution network (CDN) is a large distributed system of servers deployed in multiple data centers in the Internet. The goal of a CDN is to serve content to end-users with high availability and high performance.
RSS Rich Site Summary is a family of web feed formats used to publish frequently updated works such as blog entries, news headlines, audio, and video in a standardized format.
A web search engine is a software that is designed to search for information on the World Wide Web or on a specific site.
Web analytics is the measurement, collection, analysis and reporting of internet data for purposes of understanding and optimizing web usage.
HTTP compression is a capability that can be built into web servers and web clients to make better use of available bandwidth, and provide greater transmission speeds between both.
Web Browser Targeting
Web browser targeting enables software applications to make use of specific functions of the browser as well as optimizing the application for specific browser versions.
Technology Description Popular sites using this technology Strict Transport Security Web security policy mechanism whereby a web server declares that complying user agents are to interact with it using only secure HTTP connections accounts.google.com, medium.com, teams.microsoft.com X-Frame-Options Same Origin Do not allow this site to be rendered within an iframe www.google.com, www.amazon.co.uk, disqus.com
A Document Type Declaration, or DOCTYPE, is an instruction that associates a particular SGML or XML document (for example, a webpage) with a Document Type Definition (DTD).
HTML5 is a markup language for structuring and presenting content for the World Wide Web and a core technology of the Internet. It is the fifth revision of the HTML standard.
Cascading Style Sheets (CSS) is a style sheet language used for describing the presentation semantics (the look and formatting) of a document written in a markup language (such as XHTML).