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Following is a list of predefined URL categories.

Predefined URL categories


Advertisements & Pop-Ups

Sites that provide advertising graphics or other ad content files that appear on Web pages.

Alcohol & Tobacco

Sites that promote or sell alcohol or tobacco-related products or services.


Sites and proxies that act as an intermediary for surfing to other websites in an anonymous fashion, whether to circumvent web filtering or for other reasons.


Sites with artistic content or relating to artistic institutions such as theaters, museums, galleries, dance companies, photography, and digital graphic resources.


Sites that provide business-related information such as corporate websites. Services, information, or products that help businesses of all sizes to do their day-to-day commercial activities.


Sites that use bots (zombies) including command-and-control sites.

Command and Control

Sites and internet servers that are associated with Malware communication activity.


Sites that enable web-based, real-time messages through chat services or chat rooms.

Child Abuse Images

Sites that portray or discuss children in sexual or other abusive acts.


Sites that have been compromised by someone other than the site owner in order to install malicious programs without the user's knowledge.

Includes sites that may be vulnerable to a particular high-risk attack.

Computers & Technology

Sites that contain information, product reviews, discussions, and news about software, hardware, peripheral and computer services.  

Criminal Activity  

Sites that offer advice on how to commit illegal or criminal activities, or avoid detection, including how to commit murder, build bombs, pick locks, etc. Also information about illegal manipulation of electronic devices, hacking, fraud and illegal distribution of software.

Cryptocurrency MiningWebsites which exploit the client’s device (desktop, smartphone, tablet etc…), CPU and RAM resources, for the purpose of cryptocurrency mining.


Sites relating "cults," that is, considered to be false, unorthodox, extremist, or coercive, with members often living under the direction of a charismatic leader.

Dating & Personals

Sites that promote networking for interpersonal relationships such as dating and marriage. Includes sites for match-making, online dating, spousal introduction, escort services.

Download Sites

Sites that contain downloadable software, whether shareware, freeware, or for a charge. Includes some peer-to-peer sites


Sites sponsored by educational institutions and schools of all types including distance education. Includes general educational and reference materials such as dictionaries, encyclopedias, online courses, teaching aids and discussion guides.


Sites containing programming guides to television, movies, music and video (including video on demand), celebrity sites, and entertainment news.

Fashion & Beauty 

Sites concerning fashion, jewelry, glamour, beauty, modeling, cosmetics or related products or services.

Includes product reviews, comparisons, and general consumer information.


Sites related to banking, finance, payment or investment, including banks, brokerages, online stock trading, stock quotes, fund management, insurance companies, credit unions, credit card companies, and so on.

Forums & Newsgroups 

Sites for sharing information in the form of newsgroups, forums, bulletin boards. Does not include personal blogs.


Sites that offer or are related to online gambling, lottery, casinos and betting agencies involving chance.


Sites relating to computer or other games, information about game producers, or how to obtain cheat codes. Game-related publication sites.


Sites that do not clearly fall into other categories, for example, blank web pages.


Sites run by governmental or military organizations, departments, or agencies, including police departments, fire departments, customs bureaus, emergency services, civil defense, counterterrorism organizations and hospitals.

Greeting cards  

Sites that allow people to send and receive greeting cards and postcards


Sites that promote or give advice about how to gain unauthorized access to proprietary computer systems, for the purpose of stealing information, perpetrating fraud, creating viruses, or committing other illegal activity related to theft of digital inform.

Hate & Intolerance

Sites that promote a supremacist political agenda, encouraging oppression of people or groups of people based on their race, religion, gender, age, disability, sexual orientation or nationality.

Health & Medicine  

Sites containing information pertaining to health, healthcare services, fitness and well-being, including information about medical equipment, hospitals, drugstores, nursing, medicine, procedures, prescription medications, etc.

Illegal Drugs

Sites with information on the purchase, manufacture, and use of illegal or recreational drugs and their paraphernalia, and misuse of prescription drugs and other compounds.

Illegal Software

Sites that illegally distribute software or copyrighted materials such as movies or music, software cracks, illicit serial numbers, illegal license key generators.

Image Sharing

Sites that host digital photographs and images, online photo albums and digital photo exchanges.

Information Security

Sites that provide legitimate information about data protection, including newly discovered vulnerabilities and how to block them.

Instant Messaging

 Sites that enable logging in to instant messaging services such as ICQ, AOL Instant Messenger, IRC, MSN, Jabber, Yahoo Messenger, and the like.

Job Search

Sites containing job listings, career information, assistance with job searches (such as resume writing, interviewing tips, etc.), employment agencies or head hunters.

Leisure & Recreation

Sites relating to recreational activities and hobbies including zoos, public recreation centers, pools, amusement parks, and hobbies such as gardening, literature, arts & crafts, home improvement, home décor, family, etc.

Lingerie & Swimsuits

Sites that offer images of models in suggestive costume, with semi-nudity permitted. Includes sites offering lingerie or swimwear.


Sites that install unwanted software on a user's computer with the intent to enable third-party monitoring or make system changes without the user's consent.


Sites that do not resolve to any IP address.


Sites covering news and current events such as newspapers, news wire services, personalized news services, broadcasting sites, and magazines.

Non-profits & NGOs

Sites devoted to clubs, communities, unions, and non-profit organizations. Many of these groups exist for educational or charitable purposes.


Sites that contain full or partial nudity that are not necessarily overtly sexual in intent. Includes sites that advertise or sell lingerie, intimate apparel, or swimwear.

Parked Domains  

Sites that are inactive, typically reserved for later case. They most often do not contain their own content, may simply say under construction, purchase this domain, or display advertisements.


Sites that enable direct exchange of files between users without dependence on a central server.

Personal Sites

Sites about or hosted by personal individuals, including those hosted on commercial sites such as Geocities, AOL, etc.

Phishing and Fraud

Sites that are used for deceptive or fraudulent purposes (for example phishing), such as stealing financial or other user account information. These sites are most often designed to appear as legitimate sites in order to mislead users into entering their credentials.


Sites that promote political parties or political advocacy, or provide information about political parties, interest groups, elections, legislation or lobbying. Also includes sites that offer legal information and advice.

Pornography/Sexually Explicit

Sites that contain explicit sexual content. Includes adult products such as sex toys, CD-ROMs, and videos, adult services such as video-conferencing, escort services, and strip clubs, erotic stories and textual descriptions of sexual acts.

Private IP Addresses

 Sites that are private IP addresses as defined in RFC 1918, that is, hosts that do not require access to hosts in other enterprises (or require just limited access) and whose IP address may be ambiguous between enterprises but are well defined within a certain enterprise.

Professional Networking

Sites that enable professional networking for online communities.

Real Estate

Sites relating to commercial or residential real estate services, including renting, purchasing, selling or financing homes, offices, etc.


Sites that deal with faith, human spirituality or religious beliefs, including sites of churches, synagogues, mosques and other houses of worship.

Restaurants & Dining

Sites that list, review, promote or advertise food, dining or catering services. Includes sites for recipes sites, cooking instruction and tips, food products, and wine advisors.

School Cheating

Sites that promote unethical practices such as cheating or plagiarism by providing test answers, written essays, research papers, or term papers.

Search Engines & Portals

Sites enabling the searching of the Web, newsgroups, images, directories, and other online content. Includes portal and directory sites such as white/yellow pages.


Sites that promote actions that are relating to harming oneself, such as suicide, anorexia, bulimia, etc.

Sex Education

Sites relating to sex education, including subjects such as respect for partner, abortion, gay and lesbian lifestyle, contraceptives, sexually transmitted diseases, and pregnancy.


Sites for online shopping, catalogs, online ordering, auctions, classified ads. Excludes shopping for products and services exclusively covered by another category such as health & medicine.

Social Networking

Sites that enable social networking for online communities of various topics, for friendship, or/and dating.

Spam Sites 

Sites that have been promoted through spam techniques.


Sites relating to sports teams, fan clubs, scores and sports news. Relates to all sports, whether professional or recreational.

Streaming Media & Downloads

Sites that deliver streaming content, such as Internet radio, Internet TV or MP3 and live or archived media download sites. Includes fan sites, or official sites run by musicians, bands, or record labels.


Sites with offensive or tasteless content such as bathroom humor, or gruesome or even frightening content such as shocking depictions of blood or wounds, or cruel animal treatment.


Sites that translate Web pages or phrases from one language to another. These sites bypass the proxy server, presenting the risk that unauthorized content may be accessed, similar to using an anonymizer.


Sites that include information about motor vehicles such as cars, motorcycles, boats, trucks, RVs and the like, including online purchase sites. Includes manufacturer sites, dealerships, review sites, pricing, enthusiasts clubs, etc.


Sites that provide travel and tourism information or online booking or travel services such as airlines, accommodations, car rentals. Includes regional or city information sites.


Sites that contain images or text depicting or advocating physical assault against humans, animals, or institutions. Sites of a particularly gruesome nature. Sites that contain profanity.


Sites that depict, sell, review or describe guns and weapons, including for sport.

Web-based Email

Sites that enables users to send and receive email through a web-accessible email account.

Zero Day Malware

Sites that are classified as Malware ( see  Malware ) and were recently detected by advanced analysis techniques.

Zero Day Phishing

Sites that are classified as Phishing (see Day Phishing) and were recently detected by advanced analysis techniques.

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