{"id":139,"date":"2008-10-31T15:10:02","date_gmt":"2008-10-31T15:10:02","guid":{"rendered":"https:\/\/fir3netwp.gmsrrpobkbd.com\/2008\/10\/31\/dns-nslookup-how-to-find-the-root-servers\/"},"modified":"2021-07-27T15:49:31","modified_gmt":"2021-07-27T15:49:31","slug":"dns-nslookup-how-to-find-the-root-servers","status":"publish","type":"post","link":"https:\/\/www.fir3net.com\/Networking\/Protocols\/dns-nslookup-how-to-find-the-root-servers.html","title":{"rendered":"DNS \/ nslookup – How to find the root servers ?"},"content":{"rendered":"

DNS servers are based on a recursive look up as you can see below. <\/span><\/p>\n

Below you can see XP forwarding the request to its DNS server. The DNS Server then recursively resolves the DNS request. Once it has the answer to the Clients request, it forwards the answer back to the client. <\/span><\/p>\n

<\/a><\/p>\n

A great tool for DNS troubleshooting is nslookup.<\/span><\/p>\n

How do I find the root servers ?<\/strong><\/span><\/h3>\n
C:\\Documents and Settings\\admin>nslookup
Default Server:  dns.service.isp.net
Address:  194.168.1.100

> set type=ns
> .
Server:  cache2.service.virginmedia.net
Address:  194.168.8.100

Non-authoritative answer:
(root)  nameserver = M.ROOT-SERVERS.NET
(root)  nameserver = A.ROOT-SERVERS.NET
(root)  nameserver = B.ROOT-SERVERS.NET
(root)  nameserver = C.ROOT-SERVERS.NET
(root)  nameserver = D.ROOT-SERVERS.NET
(root)  nameserver = E.ROOT-SERVERS.NET
(root)  nameserver = F.ROOT-SERVERS.NET
(root)  nameserver = G.ROOT-SERVERS.NET
(root)  nameserver = H.ROOT-SERVERS.NET
(root)  nameserver = I.ROOT-SERVERS.NET
(root)  nameserver = J.ROOT-SERVERS.NET
(root)  nameserver = K.ROOT-SERVERS.NET
(root)  nameserver = L.ROOT-SERVERS.NET<\/span><\/pre>\n
How do I find the TLD servers ?<\/strong><\/span><\/h3>\n
> com
Server:  cache.service.isp.net
Address:  194.168.1.100

Non-authoritative answer:
com     nameserver = g.gtld-servers.net
com     nameserver = d.gtld-servers.net
com     nameserver = j.gtld-servers.net
com     nameserver = h.gtld-servers.net
com     nameserver = c.gtld-servers.net
com     nameserver = i.gtld-servers.net
com     nameserver = m.gtld-servers.net
com     nameserver = k.gtld-servers.net
com     nameserver = b.gtld-servers.net
com     nameserver = l.gtld-servers.net
com     nameserver = a.gtld-servers.net
com     nameserver = e.gtld-servers.net
com     nameserver = f.gtld-servers.net<\/span><\/pre>\n
How do I find zone information ? <\/strong>
<\/span><\/h3>\n
> set type=soa
> bbc.com
Server:  cache.service.isp.net
Address:  194.168.1.100

Non-authoritative answer:
bbc.com
 primary name server = ns0a.rbsov.bbc.co.uk
 responsible mail addr = bofh.bbc.co.uk
 serial  = 1225383591
 refresh = 86400 (1 day)
 retry   = 86400 (1 day)
 expire  = 86400 (1 day)
 default TTL = 0 (0 secs)<\/span><\/pre>\n","protected":false},"excerpt":{"rendered":"
DNS servers are based on a recursive look up as you can see below. Below you can see XP forwarding the request to its DNS server. The DNS Server then recursively resolves the DNS request. Once it has the answer to the Clients request, it forwards the answer back to the client. A great tool … Read more<\/a><\/p>\n","protected":false},"author":2,"featured_media":138,"comment_status":"closed","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[13],"tags":[],"yoast_head":"\nDNS \/ nslookup - How to find the root servers ? - Fir3net<\/title>\n<meta name=\"description\" content=\"DNS servers are based on a recursive look up as you can see below. Below you can see XP forwarding the request to its DNS server. The DNS Server then\" \/>\n<meta name=\"robots\" content=\"index, follow, max-snippet:-1, max-image-preview:large, max-video-preview:-1\" \/>\n<link rel=\"canonical\" href=\"https:\/\/www.fir3net.com\/Networking\/Protocols\/dns-nslookup-how-to-find-the-root-servers.html\" \/>\n<meta property=\"og:locale\" content=\"en_US\" \/>\n<meta property=\"og:type\" content=\"article\" \/>\n<meta property=\"og:title\" content=\"DNS \/ nslookup - How to find the root servers ? - Fir3net\" \/>\n<meta property=\"og:description\" content=\"DNS servers are based on a recursive look up as you can see below. Below you can see XP forwarding the request to its DNS server. The DNS Server then\" \/>\n<meta property=\"og:url\" content=\"https:\/\/www.fir3net.com\/Networking\/Protocols\/dns-nslookup-how-to-find-the-root-servers.html\" \/>\n<meta property=\"og:site_name\" content=\"Fir3net\" \/>\n<meta property=\"article:published_time\" content=\"2008-10-31T15:10:02+00:00\" \/>\n<meta property=\"article:modified_time\" content=\"2021-07-27T15:49:31+00:00\" \/>\n<meta property=\"og:image\" content=\"https:\/\/www.fir3net.com\/wp-content\/uploads\/2008\/10\/images_legacy_dnswhite.png\" \/>\n\t<meta property=\"og:image:width\" content=\"830\" \/>\n\t<meta property=\"og:image:height\" content=\"460\" \/>\n\t<meta property=\"og:image:type\" content=\"image\/jpeg\" \/>\n<meta name=\"author\" content=\"Rick Donato\" \/>\n<meta name=\"twitter:card\" content=\"summary_large_image\" \/>\n<meta name=\"twitter:label1\" content=\"Written by\" \/>\n\t<meta name=\"twitter:data1\" content=\"Rick Donato\" \/>\n\t<meta name=\"twitter:label2\" content=\"Est. reading time\" \/>\n\t<meta name=\"twitter:data2\" content=\"2 minutes\" \/>\n<script type=\"application\/ld+json\" class=\"yoast-schema-graph\">{\"@context\":\"https:\/\/schema.org\",\"@graph\":[{\"@type\":\"Article\",\"@id\":\"https:\/\/www.fir3net.com\/Networking\/Protocols\/dns-nslookup-how-to-find-the-root-servers.html#article\",\"isPartOf\":{\"@id\":\"https:\/\/www.fir3net.com\/Networking\/Protocols\/dns-nslookup-how-to-find-the-root-servers.html\"},\"author\":{\"name\":\"Rick Donato\",\"@id\":\"https:\/\/www.fir3net.com\/#\/schema\/person\/ab35009601b7687ee1c5310be6038037\"},\"headline\":\"DNS \/ nslookup – How to find the root servers ?\",\"datePublished\":\"2008-10-31T15:10:02+00:00\",\"dateModified\":\"2021-07-27T15:49:31+00:00\",\"mainEntityOfPage\":{\"@id\":\"https:\/\/www.fir3net.com\/Networking\/Protocols\/dns-nslookup-how-to-find-the-root-servers.html\"},\"wordCount\":89,\"publisher\":{\"@id\":\"https:\/\/www.fir3net.com\/#organization\"},\"image\":{\"@id\":\"https:\/\/www.fir3net.com\/Networking\/Protocols\/dns-nslookup-how-to-find-the-root-servers.html#primaryimage\"},\"thumbnailUrl\":\"https:\/\/www.fir3net.com\/wp-content\/uploads\/2008\/10\/images_legacy_dnswhite.png\",\"articleSection\":[\"Networking Concepts\"],\"inLanguage\":\"en-US\"},{\"@type\":\"WebPage\",\"@id\":\"https:\/\/www.fir3net.com\/Networking\/Protocols\/dns-nslookup-how-to-find-the-root-servers.html\",\"url\":\"https:\/\/www.fir3net.com\/Networking\/Protocols\/dns-nslookup-how-to-find-the-root-servers.html\",\"name\":\"DNS \/ nslookup - How to find the root servers ? - Fir3net\",\"isPartOf\":{\"@id\":\"https:\/\/www.fir3net.com\/#website\"},\"primaryImageOfPage\":{\"@id\":\"https:\/\/www.fir3net.com\/Networking\/Protocols\/dns-nslookup-how-to-find-the-root-servers.html#primaryimage\"},\"image\":{\"@id\":\"https:\/\/www.fir3net.com\/Networking\/Protocols\/dns-nslookup-how-to-find-the-root-servers.html#primaryimage\"},\"thumbnailUrl\":\"https:\/\/www.fir3net.com\/wp-content\/uploads\/2008\/10\/images_legacy_dnswhite.png\",\"datePublished\":\"2008-10-31T15:10:02+00:00\",\"dateModified\":\"2021-07-27T15:49:31+00:00\",\"description\":\"DNS servers are based on a recursive look up as you can see below. Below you can see XP forwarding the request to its DNS server. The DNS Server then\",\"breadcrumb\":{\"@id\":\"https:\/\/www.fir3net.com\/Networking\/Protocols\/dns-nslookup-how-to-find-the-root-servers.html#breadcrumb\"},\"inLanguage\":\"en-US\",\"potentialAction\":[{\"@type\":\"ReadAction\",\"target\":[\"https:\/\/www.fir3net.com\/Networking\/Protocols\/dns-nslookup-how-to-find-the-root-servers.html\"]}]},{\"@type\":\"ImageObject\",\"inLanguage\":\"en-US\",\"@id\":\"https:\/\/www.fir3net.com\/Networking\/Protocols\/dns-nslookup-how-to-find-the-root-servers.html#primaryimage\",\"url\":\"https:\/\/www.fir3net.com\/wp-content\/uploads\/2008\/10\/images_legacy_dnswhite.png\",\"contentUrl\":\"https:\/\/www.fir3net.com\/wp-content\/uploads\/2008\/10\/images_legacy_dnswhite.png\",\"width\":830,\"height\":460},{\"@type\":\"BreadcrumbList\",\"@id\":\"https:\/\/www.fir3net.com\/Networking\/Protocols\/dns-nslookup-how-to-find-the-root-servers.html#breadcrumb\",\"itemListElement\":[{\"@type\":\"ListItem\",\"position\":1,\"name\":\"Home\",\"item\":\"https:\/\/www.fir3net.com\/\"},{\"@type\":\"ListItem\",\"position\":2,\"name\":\"Networking\",\"item\":\"https:\/\/www.fir3net.com\/networking\"},{\"@type\":\"ListItem\",\"position\":3,\"name\":\"Networking Concepts\",\"item\":\"https:\/\/www.fir3net.com\/networking\/concepts-networking\"},{\"@type\":\"ListItem\",\"position\":4,\"name\":\"DNS \/ nslookup – How to find the root servers ?\"}]},{\"@type\":\"WebSite\",\"@id\":\"https:\/\/www.fir3net.com\/#website\",\"url\":\"https:\/\/www.fir3net.com\/\",\"name\":\"Fir3net\",\"description\":\"Keeping you in the know\",\"publisher\":{\"@id\":\"https:\/\/www.fir3net.com\/#organization\"},\"potentialAction\":[{\"@type\":\"SearchAction\",\"target\":{\"@type\":\"EntryPoint\",\"urlTemplate\":\"https:\/\/www.fir3net.com\/?s={search_term_string}\"},\"query-input\":\"required name=search_term_string\"}],\"inLanguage\":\"en-US\"},{\"@type\":\"Organization\",\"@id\":\"https:\/\/www.fir3net.com\/#organization\",\"name\":\"Fir3net\",\"url\":\"https:\/\/www.fir3net.com\/\",\"logo\":{\"@type\":\"ImageObject\",\"inLanguage\":\"en-US\",\"@id\":\"https:\/\/www.fir3net.com\/#\/schema\/logo\/image\/\",\"url\":\"https:\/\/www.fir3net.com\/wp-content\/uploads\/Fir3net-Background-Logo-compressed.png\",\"contentUrl\":\"https:\/\/www.fir3net.com\/wp-content\/uploads\/Fir3net-Background-Logo-compressed.png\",\"width\":390,\"height\":88,\"caption\":\"Fir3net\"},\"image\":{\"@id\":\"https:\/\/www.fir3net.com\/#\/schema\/logo\/image\/\"}},{\"@type\":\"Person\",\"@id\":\"https:\/\/www.fir3net.com\/#\/schema\/person\/ab35009601b7687ee1c5310be6038037\",\"name\":\"Rick Donato\",\"image\":{\"@type\":\"ImageObject\",\"inLanguage\":\"en-US\",\"@id\":\"https:\/\/www.fir3net.com\/#\/schema\/person\/image\/\",\"url\":\"https:\/\/secure.gravatar.com\/avatar\/d75d69a54c0ca3b32c24c3a9703b623c?s=96&d=mm&r=g\",\"contentUrl\":\"https:\/\/secure.gravatar.com\/avatar\/d75d69a54c0ca3b32c24c3a9703b623c?s=96&d=mm&r=g\",\"caption\":\"Rick Donato\"},\"description\":\"Rick Donato is a Network Automation Architect\/Evangelist and the founder of Packet Coders.\"}]}<\/script>\n<!-- \/ Yoast SEO plugin. -->","yoast_head_json":{"title":"DNS \/ nslookup - How to find the root servers ? - Fir3net","description":"DNS servers are based on a recursive look up as you can see below. Below you can see XP forwarding the request to its DNS server. The DNS Server then","robots":{"index":"index","follow":"follow","max-snippet":"max-snippet:-1","max-image-preview":"max-image-preview:large","max-video-preview":"max-video-preview:-1"},"canonical":"https:\/\/www.fir3net.com\/Networking\/Protocols\/dns-nslookup-how-to-find-the-root-servers.html","og_locale":"en_US","og_type":"article","og_title":"DNS \/ nslookup - How to find the root servers ? - Fir3net","og_description":"DNS servers are based on a recursive look up as you can see below. Below you can see XP forwarding the request to its DNS server. The DNS Server then","og_url":"https:\/\/www.fir3net.com\/Networking\/Protocols\/dns-nslookup-how-to-find-the-root-servers.html","og_site_name":"Fir3net","article_published_time":"2008-10-31T15:10:02+00:00","article_modified_time":"2021-07-27T15:49:31+00:00","og_image":[{"width":830,"height":460,"url":"https:\/\/www.fir3net.com\/wp-content\/uploads\/2008\/10\/images_legacy_dnswhite.png","type":"image\/jpeg"}],"author":"Rick Donato","twitter_card":"summary_large_image","twitter_misc":{"Written by":"Rick Donato","Est. reading time":"2 minutes"},"schema":{"@context":"https:\/\/schema.org","@graph":[{"@type":"Article","@id":"https:\/\/www.fir3net.com\/Networking\/Protocols\/dns-nslookup-how-to-find-the-root-servers.html#article","isPartOf":{"@id":"https:\/\/www.fir3net.com\/Networking\/Protocols\/dns-nslookup-how-to-find-the-root-servers.html"},"author":{"name":"Rick Donato","@id":"https:\/\/www.fir3net.com\/#\/schema\/person\/ab35009601b7687ee1c5310be6038037"},"headline":"DNS \/ nslookup – How to find the root servers ?","datePublished":"2008-10-31T15:10:02+00:00","dateModified":"2021-07-27T15:49:31+00:00","mainEntityOfPage":{"@id":"https:\/\/www.fir3net.com\/Networking\/Protocols\/dns-nslookup-how-to-find-the-root-servers.html"},"wordCount":89,"publisher":{"@id":"https:\/\/www.fir3net.com\/#organization"},"image":{"@id":"https:\/\/www.fir3net.com\/Networking\/Protocols\/dns-nslookup-how-to-find-the-root-servers.html#primaryimage"},"thumbnailUrl":"https:\/\/www.fir3net.com\/wp-content\/uploads\/2008\/10\/images_legacy_dnswhite.png","articleSection":["Networking Concepts"],"inLanguage":"en-US"},{"@type":"WebPage","@id":"https:\/\/www.fir3net.com\/Networking\/Protocols\/dns-nslookup-how-to-find-the-root-servers.html","url":"https:\/\/www.fir3net.com\/Networking\/Protocols\/dns-nslookup-how-to-find-the-root-servers.html","name":"DNS \/ nslookup - How to find the root servers ? - Fir3net","isPartOf":{"@id":"https:\/\/www.fir3net.com\/#website"},"primaryImageOfPage":{"@id":"https:\/\/www.fir3net.com\/Networking\/Protocols\/dns-nslookup-how-to-find-the-root-servers.html#primaryimage"},"image":{"@id":"https:\/\/www.fir3net.com\/Networking\/Protocols\/dns-nslookup-how-to-find-the-root-servers.html#primaryimage"},"thumbnailUrl":"https:\/\/www.fir3net.com\/wp-content\/uploads\/2008\/10\/images_legacy_dnswhite.png","datePublished":"2008-10-31T15:10:02+00:00","dateModified":"2021-07-27T15:49:31+00:00","description":"DNS servers are based on a recursive look up as you can see below. Below you can see XP forwarding the request to its DNS server. The DNS Server then","breadcrumb":{"@id":"https:\/\/www.fir3net.com\/Networking\/Protocols\/dns-nslookup-how-to-find-the-root-servers.html#breadcrumb"},"inLanguage":"en-US","potentialAction":[{"@type":"ReadAction","target":["https:\/\/www.fir3net.com\/Networking\/Protocols\/dns-nslookup-how-to-find-the-root-servers.html"]}]},{"@type":"ImageObject","inLanguage":"en-US","@id":"https:\/\/www.fir3net.com\/Networking\/Protocols\/dns-nslookup-how-to-find-the-root-servers.html#primaryimage","url":"https:\/\/www.fir3net.com\/wp-content\/uploads\/2008\/10\/images_legacy_dnswhite.png","contentUrl":"https:\/\/www.fir3net.com\/wp-content\/uploads\/2008\/10\/images_legacy_dnswhite.png","width":830,"height":460},{"@type":"BreadcrumbList","@id":"https:\/\/www.fir3net.com\/Networking\/Protocols\/dns-nslookup-how-to-find-the-root-servers.html#breadcrumb","itemListElement":[{"@type":"ListItem","position":1,"name":"Home","item":"https:\/\/www.fir3net.com\/"},{"@type":"ListItem","position":2,"name":"Networking","item":"https:\/\/www.fir3net.com\/networking"},{"@type":"ListItem","position":3,"name":"Networking Concepts","item":"https:\/\/www.fir3net.com\/networking\/concepts-networking"},{"@type":"ListItem","position":4,"name":"DNS \/ nslookup – How to find the root servers ?"}]},{"@type":"WebSite","@id":"https:\/\/www.fir3net.com\/#website","url":"https:\/\/www.fir3net.com\/","name":"Fir3net","description":"Keeping you in the know","publisher":{"@id":"https:\/\/www.fir3net.com\/#organization"},"potentialAction":[{"@type":"SearchAction","target":{"@type":"EntryPoint","urlTemplate":"https:\/\/www.fir3net.com\/?s={search_term_string}"},"query-input":"required name=search_term_string"}],"inLanguage":"en-US"},{"@type":"Organization","@id":"https:\/\/www.fir3net.com\/#organization","name":"Fir3net","url":"https:\/\/www.fir3net.com\/","logo":{"@type":"ImageObject","inLanguage":"en-US","@id":"https:\/\/www.fir3net.com\/#\/schema\/logo\/image\/","url":"https:\/\/www.fir3net.com\/wp-content\/uploads\/Fir3net-Background-Logo-compressed.png","contentUrl":"https:\/\/www.fir3net.com\/wp-content\/uploads\/Fir3net-Background-Logo-compressed.png","width":390,"height":88,"caption":"Fir3net"},"image":{"@id":"https:\/\/www.fir3net.com\/#\/schema\/logo\/image\/"}},{"@type":"Person","@id":"https:\/\/www.fir3net.com\/#\/schema\/person\/ab35009601b7687ee1c5310be6038037","name":"Rick Donato","image":{"@type":"ImageObject","inLanguage":"en-US","@id":"https:\/\/www.fir3net.com\/#\/schema\/person\/image\/","url":"https:\/\/secure.gravatar.com\/avatar\/d75d69a54c0ca3b32c24c3a9703b623c?s=96&d=mm&r=g","contentUrl":"https:\/\/secure.gravatar.com\/avatar\/d75d69a54c0ca3b32c24c3a9703b623c?s=96&d=mm&r=g","caption":"Rick Donato"},"description":"Rick Donato is a Network Automation Architect\/Evangelist and the founder of Packet Coders."}]}},"_links":{"self":[{"href":"https:\/\/www.fir3net.com\/wp-json\/wp\/v2\/posts\/139"}],"collection":[{"href":"https:\/\/www.fir3net.com\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/www.fir3net.com\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/www.fir3net.com\/wp-json\/wp\/v2\/users\/2"}],"replies":[{"embeddable":true,"href":"https:\/\/www.fir3net.com\/wp-json\/wp\/v2\/comments?post=139"}],"version-history":[{"count":0,"href":"https:\/\/www.fir3net.com\/wp-json\/wp\/v2\/posts\/139\/revisions"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/www.fir3net.com\/wp-json\/wp\/v2\/media\/138"}],"wp:attachment":[{"href":"https:\/\/www.fir3net.com\/wp-json\/wp\/v2\/media?parent=139"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/www.fir3net.com\/wp-json\/wp\/v2\/categories?post=139"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/www.fir3net.com\/wp-json\/wp\/v2\/tags?post=139"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}