DNS Advantage is a proprietary opt-in DNS service. It does not follow internet standard

Internet standard

In computer network engineering, an Internet Standard is a normative specification of a technology or methodology applicable to the Internet. Internet Standards are created and published by the Internet Engineering Task Force .-Overview:...

s—for example, the component of its service that implements typographical checking constitutes DNS hijacking

DNS hijacking

DNS hijacking or DNS redirection is the practice of redirecting the resolution of Domain Name System names to other DNS servers. This is done for malicious purposes such as phishing; for self-serving purposes by Internet service providers to direct users' HTTP traffic via the ISP's own webservers...

.

Services

It provides the following two recursive nameserver addresses for public use, mapped to the nearest operational server location by anycast

Anycast

Anycast is a network addressing and routing methodology in which datagrams from a single sender are routed to the topologically nearest node in a group of potential receivers all identified by the same destination address.-Addressing methodologies:...

 routing:

• 156.154.70.1
• 156.154.71.1

Current services are limited to DNS resolution and blocking of malicious or questionable websites. Independent testing of the malicious site blocking shows that the block list is limited.

Planned services are:

• Typographic correction
• Management dashboard
• Domain filtering 'site blocker'

As of September 2009, DNS Advantage provides geographically distributed servers in 15 locations on 5 continents.

The cities hosting their servers are:

• Ashburn
  Ashburn
  Ashburn is the name of several places in the United States of America:*Ashburn, Georgia*Ashburn, Chicago, Illinois, a community area*Ashburn, Virginia, unincorporated area in Loudoun County.and in Canada:*Ashburn, Ontario*Ashburn...
  
  , VA
  Virginia
  The Commonwealth of Virginia , is a U.S. state on the Atlantic Coast of the Southern United States. Virginia is nicknamed the "Old Dominion" and sometimes the "Mother of Presidents" after the eight U.S. presidents born there...
  
  
• Chicago
  Chicago
  Chicago is the largest city in the US state of Illinois. With nearly 2.7 million residents, it is the most populous city in the Midwestern United States and the third most populous in the US, after New York City and Los Angeles...
  
  , IL
  Illinois
  Illinois is the fifth-most populous state of the United States of America, and is often noted for being a microcosm of the entire country. With Chicago in the northeast, small industrial cities and great agricultural productivity in central and northern Illinois, and natural resources like coal,...
  
  
• Dallas, TX
  Texas
  Texas is the second largest U.S. state by both area and population, and the largest state by area in the contiguous United States.The name, based on the Caddo word "Tejas" meaning "friends" or "allies", was applied by the Spanish to the Caddo themselves and to the region of their settlement in...
  
  
• Miami, FL
  Florida
  Florida is a state in the southeastern United States, located on the nation's Atlantic and Gulf coasts. It is bordered to the west by the Gulf of Mexico, to the north by Alabama and Georgia and to the east by the Atlantic Ocean. With a population of 18,801,310 as measured by the 2010 census, it...
  
  
• New York
  New York City
  New York is the most populous city in the United States and the center of the New York Metropolitan Area, one of the most populous metropolitan areas in the world. New York exerts a significant impact upon global commerce, finance, media, art, fashion, research, technology, education, and...
  
  , NY
  New York
  New York is a state in the Northeastern region of the United States. It is the nation's third most populous state. New York is bordered by New Jersey and Pennsylvania to the south, and by Connecticut, Massachusetts and Vermont to the east...
  
  
• Palo Alto, CA
  California
  California is a state located on the West Coast of the United States. It is by far the most populous U.S. state, and the third-largest by land area...
  
  
• San Jose
  San Jose, California
  San Jose is the third-largest city in California, the tenth-largest in the U.S., and the county seat of Santa Clara County which is located at the southern end of San Francisco Bay...
  
  , CA
  California
  California is a state located on the West Coast of the United States. It is by far the most populous U.S. state, and the third-largest by land area...
  
  
• London
  London
  London is the capital city of :England and the :United Kingdom, the largest metropolitan area in the United Kingdom, and the largest urban zone in the European Union by most measures. Located on the River Thames, London has been a major settlement for two millennia, its history going back to its...
  
  , UK
• Luxembourg
  Luxembourg
  Luxembourg , officially the Grand Duchy of Luxembourg , is a landlocked country in western Europe, bordered by Belgium, France, and Germany. It has two principal regions: the Oesling in the North as part of the Ardennes massif, and the Gutland in the south...
  
  
• Amsterdam
  Amsterdam
  Amsterdam is the largest city and the capital of the Netherlands. The current position of Amsterdam as capital city of the Kingdom of the Netherlands is governed by the constitution of August 24, 1815 and its successors. Amsterdam has a population of 783,364 within city limits, an urban population...
  
  , The Netherlands
• Johannesburg
  Johannesburg
  Johannesburg also known as Jozi, Jo'burg or Egoli, is the largest city in South Africa, by population. Johannesburg is the provincial capital of Gauteng, the wealthiest province in South Africa, having the largest economy of any metropolitan region in Sub-Saharan Africa...
  
  , South Africa
  South Africa
  The Republic of South Africa is a country in southern Africa. Located at the southern tip of Africa, it is divided into nine provinces, with of coastline on the Atlantic and Indian oceans...
  
  
• Beijing
  Beijing
  Beijing , also known as Peking , is the capital of the People's Republic of China and one of the most populous cities in the world, with a population of 19,612,368 as of 2010. The city is the country's political, cultural, and educational center, and home to the headquarters for most of China's...
  
  , China
  China
  Chinese civilization may refer to:* China for more general discussion of the country.* Chinese culture* Greater China, the transnational community of ethnic Chinese.* History of China* Sinosphere, the area historically affected by Chinese culture...
  
  
• Sydney
  Sydney
  Sydney is the most populous city in Australia and the state capital of New South Wales. Sydney is located on Australia's south-east coast of the Tasman Sea. As of June 2010, the greater metropolitan area had an approximate population of 4.6 million people...
  
  , Australia
  Australia
  Australia , officially the Commonwealth of Australia, is a country in the Southern Hemisphere comprising the mainland of the Australian continent, the island of Tasmania, and numerous smaller islands in the Indian and Pacific Oceans. It is the world's sixth-largest country by total area...
  
  
• Hong Kong
  Hong Kong
  Hong Kong is one of two Special Administrative Regions of the People's Republic of China , the other being Macau. A city-state situated on China's south coast and enclosed by the Pearl River Delta and South China Sea, it is renowned for its expansive skyline and deep natural harbour...
  
  
• and an undisclosed location in India
  India
  India , officially the Republic of India , is a country in South Asia. It is the seventh-largest country by geographical area, the second-most populous country with over 1.2 billion people, and the most populous democracy in the world...
  
  .

Four more locations are planned during 2008 to Canada

Canada

Canada is a North American country consisting of ten provinces and three territories. Located in the northern part of the continent, it extends from the Atlantic Ocean in the east to the Pacific Ocean in the west, and northward into the Arctic Ocean...

, South America

South America

South America is a continent situated in the Western Hemisphere, mostly in the Southern Hemisphere, with a relatively small portion in the Northern Hemisphere. The continent is also considered a subcontinent of the Americas. It is bordered on the west by the Pacific Ocean and on the north and east...

 and the Middle East

Middle East

The Middle East is a region that encompasses Western Asia and Northern Africa. It is often used as a synonym for Near East, in opposition to Far East...

.

History

DNS Advantage was launched on December 11, 2007 as a free DNS service. It is built on top of the infrastructure already provided by the commercial, fee based UltraDNS service. Both the free and fee based services are operated by NeuStar

NeuStar

Neustar, Inc. is a provider of clearinghouse and directory services to the global communications and Internet industries.-History:Neustar was incorporated in Delaware in 1998. It started as a business unit within Lockheed Martin Corporation...

.
While UltraDNS provides DNS services to many household names such as Amazon.com

Amazon.com

Amazon.com, Inc. is a multinational electronic commerce company headquartered in Seattle, Washington, United States. It is the world's largest online retailer. Amazon has separate websites for the following countries: United States, Canada, United Kingdom, Germany, France, Italy, Spain, Japan, and...

, Gap

Gap (clothing retailer)

The Gap, Inc. is an American clothing and accessories retailer based in San Francisco, California, and founded in 1969 by Donald G. Fisher and Doris F. Fisher. The company has five primary brands: the namesake Gap banner, Banana Republic, Old Navy, Piperlime and Athleta. As of September 2008,...

, MySpace

MySpace

Myspace is a social networking service owned by Specific Media LLC and pop star Justin Timberlake. Myspace launched in August 2003 and is headquartered in Beverly Hills, California. In August 2011, Myspace had 33.1 million unique U.S. visitors....

, LinkedIn

LinkedIn

LinkedIn is a business-related social networking site. Founded in December 2002 and launched in May 2003, it is mainly used for professional networking. , LinkedIn reports more than 120 million registered users in more than 200 countries and territories. The site is available in English, French,...

 and Oracle

Oracle Corporation

Oracle Corporation is an American multinational computer technology corporation that specializes in developing and marketing hardware systems and enterprise software products – particularly database management systems...

 amongst others, it is not clear who utilizes the free DNS Advantage service. The free service is in direct competition to OpenDNS

OpenDNS

OpenDNS is a DNS resolution service. OpenDNS extends DNS adding features such as misspelling correction, phishing protection, and optional content filtering...

. Like its competitor, DNSAdvantage is based on closed-source software.