|Site title||Encyclopedia Britannica | Britannica|
|Description||Explore the fact-checked online encyclopedia from Encyclopaedia Britannica with hundreds of thousands of objective articles, biographies, videos, and images from experts.|
|Date first seen||March 1996|
|Netcraft Risk Rating||0/10|
|Netblock Owner||Amazon Technologies Inc.|
|IP address||188.8.131.52 (VirusTotal)|
|IPv6 address||Not Present|
|Organisation||Encyclopaedia Britannica, Inc., Chicago, 60654, US|
|Hosting company||Amazon - US East (Northern Virginia) datacenter|
|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|
|↳ 184.108.40.206-220.127.116.11||United States||NET54||American Registry for Internet Numbers|
|↳ 18.104.22.168-22.214.171.124||United States||AMAZON-2011L||Amazon Technologies Inc.|
|↳ 126.96.36.199||United States||AMAZON-2011L||Amazon Technologies Inc.|
Last Reboot (1 day ago)
Note: Uptime - the time since last reboot is explained in the FAQ
|Plotted Value||No. samples||Max||Latest|
|90-day Moving average||96||20.73||15.03|
This is not a HTTPS site. If you're looking for SSL/TLS information try the HTTPS site report.
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.
Warning: It appears that this host does not have an SPF record. There may be an SPF record on britannica.com: Check the site report.
Setting up an SPF record helps prevent the delivery of forged emails from your domain. Please note that an SPF record will only protect the domain it is added to and not any mail-enabled subdomains. It is recommended to add an SPF record to any subdomain with an MX record.
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.
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|Company||Primary Category||Tracker||Popular Sites with this Tracker|
|Amazon||Advertising||Amazon Associate||www.verizon.com, www.footmercato.net, www.leparisien.fr|
|Casale Media||Advertising||Indexww||www.wetteronline.de, www.gumtree.co.za, www.buienradar.nl|
|Fastly||CDN||Fastly CDN||www.usatoday.com, www.fark.com, www.michiganlottery.com|
|Advertising||DoubleClick||www.wsj.com, www.uol.com.br, www.walmart.com|
|Analytics||Googletagmanager||www.repubblica.it, www.zhihu.com, www.bbc.co.uk|
|CDN||Googlecdn||www.etoro.com, www.researchgate.net, www.upwork.com|
Site Technology (fetched 14 days ago)
Cloud & PaaS
Cloud computing is the use of computing resources (hardware and software) that are delivered as a service over a network (typically the Internet). Platform as a service (PaaS) is a category of cloud computing services that provide a computing platform and a solution stack as a service.
An application server is a server that provides software applications with services such as security, data services, transaction support, load balancing, and management of large distributed systems.
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.
An online advertising network or ad network is a company that connects advertisers to web sites that want to host advertisements.
A character encoding system consists of a code that pairs each character from a given repertoire with something else such as a bit pattern, sequence of natural numbers, octets, or electrical pulses in order to facilitate the transmission of data (generally numbers or text) through telecommunication networks or for data storage.
Technology Description Popular sites using this technology UTF8 UCS Transformation Format 8 bit disqus.com
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.
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).