E.root-servers.net

NASA operates E.root-servers.net, one of the thirteen logical Internet Root name servers. NASA cooperates with the eleven other Root Server Operators to provide authoritative data for the DNS Root Zone. The E-Root Server system is operated by the Information Technology Operations Division at NASA Ames Research Center under the direction of the Ames Office of the Chief Information Officer.

E-Root receives DNS queries over IPv4 at 192.203.230.10 and over IPv6 at 2001:500:A8::E.

The Domain Name System is a distributed hierarchical database of resource records that permit (among other things) the translation of hostnames into IP addresses and vice versa. The root of this hierarchy is anchored on 13 domain name servers scattered across the globe. E-Root uses IP Anycast to provide service from a number of locations throughout the world which may change from time to time.

E-Root Server Locations

Pin IPv4 IPv6 Instance
Active Active Local
Active Active Global
Active Inactive Local
  • Accra, Ghana (1 site)
  • Amsterdam, Netherlands (2 sites)
  • Antananarivo, Madagascar (1 site)
  • Arica, Chile (1 site)
  • Arusha, Tanzania (1 site)
  • Ashburn, United States (1 site)
  • Athens, Greece (1 site)
  • Atlanta, United States (1 site)
  • Atlanta, United States (2 sites)
  • Auckland, New Zealand (1 site)
  • Auckland, New Zealand (1 site)
  • Baghdad, Iraq (1 site)
  • Baltimore, United States (1 site)
  • Bangkok, Thailand (5 sites)
  • Banjul, Gambia (1 site)
  • Barcelona, Spain (1 site)
  • Barcelona, Spain (1 site)
  • Beaverton, United States (1 site)
  • Beirut, Lebanon (2 sites)
  • Belgrade, Serbia (1 site)
  • Belgrade, Serbia (1 site)
  • Belgrade, Serbia (1 site)
  • Berlin, Germany (1 site)
  • Berlin, Germany (1 site)
  • Beverly, United States (1 site)
  • Blantyre, Malawi (1 site)
  • Bogota, Colombia (1 site)
  • Boston, United States (1 site)
  • Boston, United States (1 site)
  • Brisbane, Australia (1 site)
  • Brussels, Belgium (1 site)
  • Bucharest, Romania (1 site)
  • Bucharest, Romania (1 site)
  • Budapest, Hungary (1 site)
  • Buenos Aires, Argentina (1 site)
  • Buenos Aires, Argentina (1 site)
  • Buenos Aires, Argentina (1 site)
  • Buffalo, United States (1 site)
  • Burbank, United States (1 site)
  • Cairo, Egypt (1 site)
  • Calgary, Canada (1 site)
  • Calgary, Canada (1 site)
  • Cape Town, South Africa (1 site)
  • Cape Town, South Africa (1 site)
  • Castries, St. Lucia (1 site)
  • Cebu, Philippines (1 site)
  • Charlotte, United States (1 site)
  • Chennai, India (2 sites)
  • Chicago, United States (1 site)
  • Chicago, United States (2 sites)
  • Colombo, Sri Lanka (2 sites)
  • Columbus, United States (1 site)
  • Copenhagen, Denmark (1 site)
  • Cork, Ireland (1 site)
  • Cotonou, Benin (1 site)
  • Curitiba, Brazil (1 site)
  • Dakar, Senegal (1 site)
  • Dallas, United States (2 sites)
  • Dar Es Salaam, Tanzania (1 site)
  • Dar es Salaam, Tanzania (1 site)
  • Denver, United States (1 site)
  • Denver, United States (1 site)
  • Denver, United States (1 site)
  • Detroit, United States (1 site)
  • Djibouti City, Djibouti (1 site)
  • Doha, Qatar (1 site)
  • Dubai, United Arab Emirates (2 sites)
  • Dublin, Ireland (1 site)
  • Dublin, Ireland (1 site)
  • Durban, South Africa (1 site)
  • Durban, South Africa (1 site)
  • Dusseldorf, Germany (1 site)
  • Edinburgh, Great Britain (1 site)
  • Enfidha, Tunisia (1 site)
  • Fortaleza, Brazil (1 site)
  • Frankfurt, Germany (2 sites)
  • Geneva, Switzerland (1 site)
  • Gothenburg, Sweden (1 site)
  • Guayaquil, Ecuador (1 site)
  • Halifax, Canada (1 site)
  • Hamburg, Germany (1 site)
  • Helsinki, Finland (1 site)
  • Hong Kong, Hong Kong (2 sites)
  • Houston, United States (1 site)
  • Hyderabad, India (1 site)
  • Indianapolis, United States (1 site)
  • Istanbul, Turkey (1 site)
  • Istanbul, Turkey (2 sites)
  • Jacksonville, United States (1 site)
  • Jakarta, Indonesia (1 site)
  • Jakarta, Indonesia (1 site)
  • Johannesburg, South Africa (1 site)
  • Johannesburg, South Africa (1 site)
  • Johor Bahru, Malaysia (1 site)
  • Kampala, Uganda (1 site)
  • Kansas City, United States (1 site)
  • Kansas City, United States (1 site)
  • Kathmandu, Nepal (2 sites)
  • Kigali, Rwanda (2 sites)
  • Kingston, Jamaica (1 site)
  • Klagenfurt, Austria (1 site)
  • Kuala Lumpur, Malaysia (1 site)
  • Kuala Lumpur, Malaysia (1 site)
  • Kuwait City, Kuwait (1 site)
  • Kyiv, Ukraine (1 site)
  • La Paz, Bolivia (1 site)
  • Lagos, Nigeria (3 sites)
  • Las Vegas, United States (1 site)
  • Lausanne, Switzerland (1 site)
  • Lima, Peru (1 site)
  • Lisbon, Portugal (1 site)
  • Lisbon, Portugal (1 site)
  • London, Great Britain (2 sites)
  • Los Angeles, United States (1 site)
  • Luanda, Angola (2 sites)
  • Luxembourg City, Luxembourg (1 site)
  • Lyon, France (1 site)
  • Macau, Macau (1 site)
  • Madrid, Spain (2 sites)
  • Manama, Bahrain (1 site)
  • Manchester, Great Britain (1 site)
  • Manchester, United Kingdom (1 site)
  • Manila, Philippines (1 site)
  • Manila, Philippines (2 sites)
  • Maputo, Mozambique (1 site)
  • Maputo, Mozambique (1 site)
  • Mar Del Plata, Argentina (1 site)
  • Marseille, France (2 sites)
  • McAllen, United States (1 site)
  • Medellin, Colombia (1 site)
  • Melbourne, Australia (1 site)
  • Memphis, United States (1 site)
  • Mexico City, Mexico (1 site)
  • Miami, United States (2 sites)
  • Milan, Italy (1 site)
  • Minneapolis, United States (1 site)
  • Mombasa, Kenya (2 sites)
  • Moncton, Canada (1 site)
  • Monrovia, Liberia (1 site)
  • Montgomery, United States (1 site)
  • Montgomery, United States (1 site)
  • Montreal, Canada (1 site)
  • Montreal, Canada (1 site)
  • Moscow, Russia (1 site)
  • Mountain View, United States (1 site)
  • Mumbai, India (5 sites)
  • Munich, Germany (1 site)
  • Muscat, Oman (1 site)
  • Nagpur, India (1 site)
  • Nairobi, Kenya (1 site)
  • Nashville, United States (1 site)
  • New Delhi, India (1 site)
  • New York, United States (1 site)
  • Newark, United States (1 site)
  • Newark, United States (1 site)
  • Norfolk, United States (1 site)
  • Noumea, New Caledonia (1 site)
  • Omaha, United States (1 site)
  • Osaka, Japan (1 site)
  • Oslo, Norway (1 site)
  • Ottawa, Canada (1 site)
  • Palo Alto, United States (1 site)
  • Panama City, Panama (1 site)
  • Paris, France (2 sites)
  • Perth, Australia (1 site)
  • Perth, Australia (1 site)
  • Philadelphia, United States (1 site)
  • Phnom Penh, Cambodia (2 sites)
  • Phoenix, United States (1 site)
  • Phoenix, United States (1 site)
  • Pittsburgh, United States (1 site)
  • Port Louis, Mauritius (2 sites)
  • Port Vila, Vanuatu (1 site)
  • Port au Prince, Haiti (1 site)
  • Port of Spain, Trinidad and Tobago (1 site)
  • Portland, United States (1 site)
  • Portland, United States (1 site)
  • Porto Alegre, Brazil (1 site)
  • Posadas, Argentina (1 site)
  • Prague, Czech Republic (1 site)
  • Prague, Czechia (1 site)
  • Queretaro, Mexico (1 site)
  • Quito, Ecuador (1 site)
  • Ramallah, Palestine (2 sites)
  • Rene Mouawad, Lebanon (1 site)
  • Reno, United States (1 site)
  • Reunion, Reunion (1 site)
  • Reykjavik, Iceland (1 site)
  • Richmond, United States (1 site)
  • Richmond, United States (1 site)
  • Riga, Latvia (1 site)
  • Rio de Janeiro, Brazil (1 site)
  • Riyadh, Saudi Arabia (1 site)
  • Rome, Italy (1 site)
  • Rosario, Argentina (1 site)
  • Sacramento, United States (1 site)
  • Saint George, United States (1 site)
  • Saldanha, South Africa (1 site)
  • Salt Lake City, United States (1 site)
  • San Diego, United States (1 site)
  • San Francisco, United States (1 site)
  • San Jose, United States (1 site)
  • San Jose, Costa Rica (1 site)
  • Santa Ana, United States (1 site)
  • Santiago, Chile (3 sites)
  • Sao Paulo, Brazil (1 site)
  • Saskatoon, Canada (1 site)
  • Saskatoon, Canada (1 site)
  • Seattle, United States (2 sites)
  • Seoul, South Korea (1 site)
  • Seoul, South Korea (1 site)
  • Siegerland, Germany (1 site)
  • Singapore, Singapore (2 sites)
  • Sofia, Bulgaria (1 site)
  • Sofia, Bulgaria (1 site)
  • St. Georges, Grenada (1 site)
  • St. Louis, United States (1 site)
  • St. Louis, United States (1 site)
  • Stockholm, Sweden (1 site)
  • Sumbe, Angola (1 site)
  • Sydney, Australia (2 sites)
  • Taipei, Taiwan (1 site)
  • Tallahassee, United States (1 site)
  • Tallinn, Estonia (1 site)
  • Tallinn, Estonia (1 site)
  • Tampa, United States (1 site)
  • Tampa, United States (1 site)
  • Tampere, Finland (1 site)
  • Tegucigalpa, Honduras (1 site)
  • Tel Aviv, Israel (2 sites)
  • Thessaloniki, Greece (1 site)
  • Tokyo, Japan (1 site)
  • Tokyo, Japan (1 site)
  • Toronto, Canada (1 site)
  • Toronto, Canada (1 site)
  • Tunis, Tunisia (1 site)
  • Turin, Italy (1 site)
  • Ulaanbaatar, Mongolia (2 sites)
  • Valparaiso, Chile (1 site)
  • Vancouver, Canada (1 site)
  • Vienna, Austria (1 site)
  • Vienna, Austria (1 site)
  • Vilnius, Lithuania (1 site)
  • Vilnius, Lithuania (1 site)
  • Warsaw, Poland (1 site)
  • Warsaw, Poland (1 site)
  • Washington, United States (1 site)
  • Wellington, New Zealand (1 site)
  • Willemstad, Curacao (1 site)
  • Windhoek, Namibia (1 site)
  • Winnipeg, Canada (1 site)
  • Winnipeg, Canada (1 site)
  • Yerevan, Armenia (2 sites)
  • Zagreb, Croatia (1 site)
  • Zurich, Switzerland (1 site)
  • Zurich, Switzerland (1 site)

RSSAC-002

The root operators collect and publish root server system metrics in accordance with RSSAC-002, the RSSAC Advisory on Measurements of the Root Server System. The E-root RSSAC-002 data is published daily.

Root Server Organizations

NASA, as the operator of the root nameserver "E", recognizes the following organizations as current root nameserver operators and endeavors to coordinate operational service with them:

  • Verisign, Inc. (A/J)
  • University of Southern California, Information Sciences Institute (B)
  • Cogent Communications, Inc. (C)
  • University of Maryland (D)
  • National Aeronautics and Space Administration (NASA) Ames Research Center (E)
  • Internet Systems Consortium, Inc. (F)
  • US Department of Defense, Defense Information Systems Agency (G)
  • US Army Research Laboratory (H)
  • Netnod (I)
  • Réseaux IP Européens Network Coordination Centre (RIPE NCC) (K)
  • Internet Corporation for Assigned Names and Numbers (ICANN) (L)
  • Widely Integrated Distributed Environment (WIDE) Project (M)

Documents