{"id":1225,"date":"2013-06-18T09:29:14","date_gmt":"2013-06-18T13:29:14","guid":{"rendered":"http:\/\/digitalprominence.com\/website\/?p=1225"},"modified":"2015-09-21T17:52:51","modified_gmt":"2015-09-21T21:52:51","slug":"techno-tip-1-domain-name-server-propagation","status":"publish","type":"post","link":"http:\/\/digitalprominence.com\/website\/techno-tip-1-domain-name-server-propagation\/","title":{"rendered":"Techno Tip #1:  Strange Domain Behavior?  Could Be a DNS Propagation Problem!"},"content":{"rendered":"<div class=\"notbox gray\" style=\"text-align: left;\"><img decoding=\"async\" class=\"snzpicon\" alt=\"\" src=\"http:\/\/digitalprominence.com\/website\/wp-content\/plugins\/pg-magic-styles\/images\/icons\/info.png\" \/>If you&#8217;re not familiar with the way that domains and web hosting relate to each other, read <a title=\"Techno Tip #1b: A Primer on Domains and Web Hosting\" href=\"http:\/\/digitalprominence.com\/website\/techno-tip-1b-a-primer-on-domains-and-web-hosting\/\">this<\/a> first.<\/div>\n<p><img loading=\"lazy\" decoding=\"async\" class=\"alignnone size-full wp-image-1478\" style=\"float: left;\" alt=\"dns\" src=\"http:\/\/digitalprominence.com\/website\/wp-content\/uploads\/dns.png\" height=\"200\" width=\"200\" srcset=\"http:\/\/digitalprominence.com\/website\/wp-content\/uploads\/dns.png 200w, http:\/\/digitalprominence.com\/website\/wp-content\/uploads\/dns-100x100.png 100w, http:\/\/digitalprominence.com\/website\/wp-content\/uploads\/dns-47x47.png 47w\" sizes=\"auto, (max-width: 200px) 100vw, 200px\" \/>Any registered domain \u201cpoints\u201d to a server (normally TWO servers&#8211;primary &amp; secondary\u2014for redundancy). They\u2019re called \u201cdomain name servers\u201d (DNS). These named servers are the physical devices where your website files and email accounts actually live. The Internet Corporation for Assigned Names and Numbers (ICANN) maintains a master database of DNS records. Each DNS record contains the domain name and the domain\u2019s associated named servers.<\/p>\n<p>When you access a website through an Internet Service Provider (ISP), the ISP locates the website\u2019s DNS records and sends you to the servers identified in those records.\u00a0 The ISP may be a cable company, phone service provider, satellite dish provider \u2013 whoever provides the Internet service for wherever you happen to be at the time.<\/p>\n<h3>So what\u2019s the problem?<\/h3>\n<p>The problem with this whole scheme is that in order to speed up the rate at which their customers can view the Internet, each Internet Server Provider caches their DNS records. This means that they make their own copy of the master records, and read from them locally instead of looking them up on the Internet each time someone wants view a website. This actually speeds up web surfing quite a bit, by (1) speeding up the return time it takes for a web browser to request a domain lookup and get an answer, and (2) actually reducing the amount of traffic on the web therefore giving it the ability to work faster.<\/p>\n<p>The downside to this caching scenario is that each company or ISP that caches DNS records only updates them every few days. There&#8217;s no standard for this, and each ISP can set this time to be anywhere from a few hours to several days. So if, for example, you change web hosts (which changes your domain name servers), the change won&#8217;t be accurately reflected in an ISP&#8217;s DNS records database until the ISP actually updates their database cache by going out to fetch updated DNS records.\u00a0 The updating of the DNS cache is called &#8220;propagation&#8221;, since your website\u2019s DNS information is being propagated across <strong>all DNS servers for all ISPs on the web<\/strong>. Until propagation completes, you can potentially experience different results from different ISPs. Since the cache-refresh time can be different for each ISP, it can take anywhere from 24 to 72 hours for DNS changes to be totally in effect. Until then there may be some ISPs with old DNS records, and some ISPs with updated ones.\u00a0 So if, for example, you have one ISP at home, and a different ISP at work, you might get different results when you attempt to access your domain (website, emails, etc.) for a little while, until the DNS records have been updated by every ISP you&#8217;re using.\u00a0 As if this wasn&#8217;t complicated enough, your accessing of a particular site on the Internet can sometimes be routed through a different set of Internet servers.\u00a0 In other words, the path that&#8217;s taken by your ISP to get to the website you&#8217;re looking for isn&#8217;t always the same.\u00a0 So you may access your desired website just fine now, and in a half hour (if the route changes), you may run into a non-updated DNS cache and NOT see what you expected.<\/p>\n<p>Just be patient.\u00a0 The whole propagation cycle should be completed within 3 days.<\/p>\n<p>If you have questions about this process, please <a title=\"Contact Us\" href=\"http:\/\/digitalprominence.com\/website\/contact-us\/\">contact me<\/a>.<\/p>\n<p><span style=\"font-family: times new roman,times; color: #0000ff;\"><em>\u201cTech\u2019s not scary when knowledge tags along\u201d <span style=\"font-size: 8px;\"><sup>SM<\/sup><\/span><\/em><\/span><\/p>\n","protected":false},"excerpt":{"rendered":"<p>If you&#8217;re not familiar with the way that domains and web hosting relate to each other, read this first. Any registered domain \u201cpoints\u201d to a server (normally TWO servers&#8211;primary &amp; secondary\u2014for redundancy). They\u2019re called \u201cdomain name servers\u201d (DNS). These named servers are the physical devices where your website files and email accounts actually live. The [&hellip;]<\/p>\n","protected":false},"author":1,"featured_media":0,"comment_status":"open","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"_monsterinsights_skip_tracking":false,"_monsterinsights_sitenote_active":false,"_monsterinsights_sitenote_note":"","_monsterinsights_sitenote_category":0,"_jetpack_memberships_contains_paid_content":false,"footnotes":""},"categories":[65],"tags":[],"class_list":["post-1225","post","type-post","status-publish","format-standard","hentry","category-techno-tips"],"yoast_head":"<!-- This site is optimized with the Yoast SEO plugin v27.4 - https:\/\/yoast.com\/product\/yoast-seo-wordpress\/ -->\n<title>Techno Tip #1: Strange Domain Behavior? Could Be a DNS Propagation Problem! - Digital Prominence<\/title>\n<meta name=\"robots\" content=\"index, follow, max-snippet:-1, max-image-preview:large, max-video-preview:-1\" \/>\n<link rel=\"canonical\" href=\"http:\/\/digitalprominence.com\/website\/techno-tip-1-domain-name-server-propagation\/\" \/>\n<meta property=\"og:locale\" content=\"en_US\" \/>\n<meta property=\"og:type\" content=\"article\" \/>\n<meta property=\"og:title\" content=\"Techno Tip #1: Strange Domain Behavior? Could Be a DNS Propagation Problem! - Digital Prominence\" \/>\n<meta property=\"og:description\" content=\"If you&#8217;re not familiar with the way that domains and web hosting relate to each other, read this first. Any registered domain \u201cpoints\u201d to a server (normally TWO servers&#8211;primary &amp; secondary\u2014for redundancy). They\u2019re called \u201cdomain name servers\u201d (DNS). These named servers are the physical devices where your website files and email accounts actually live. 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