{"id":2337,"date":"2020-06-10T01:03:23","date_gmt":"2020-06-09T17:03:23","guid":{"rendered":"https:\/\/www.wesbytes.com\/guide\/?post_type=kb&p=2337"},"modified":"2026-03-16T16:45:09","modified_gmt":"2026-03-16T08:45:09","slug":"5-powerful-facts-about-sub-domain","status":"publish","type":"kb","link":"https:\/\/www.servergigabit.com\/guide\/kb\/5-powerful-facts-about-sub-domain","title":{"rendered":"5 Powerful Facts About Sub-Domains You Must Know"},"content":{"rendered":"

What is Sub-Domain?<\/strong><\/h2>\n

\"Sub-Domain\"<\/p>\n

 <\/p>\n

In the Domain Name Server (DNS)<\/a> hierarchy, a sub-domain is a domain that is part of a broader domain name. A DNS hierarchy consists of the highest root-level domain, the first-level domain below followed by second-level domains and subdomains at last.<\/p>\n

Valid sub-domains as defined in RFC 1034 that contain any letter or number as well as-‘ ‘(hyphen). Sub-domain must start with an alphabet character. Sub-domains are case-insensitive, and ‘ABC.com’ is the same as ‘abc.COM’ when the upper and lower case characters are real.<\/p>\n

Length of sub domain
\nThe length of a\u00a0 sub-domain label is limited to 63 characters, although there is an arbitrary<\/span> number of subdomain labels in the domain name.<\/p>\n

Structure
\n“Dots” seperated the Sub-Domains and read in descending detail from left to right. It contains all of the previous subdomains and all of the following subdomains. Both subdomains are composed of a second-level domain, which in effect includes the top-level domain.<\/p>\n

For this case, the top-level domain is ‘tld’ and the second-level domain is ‘domain.’The sub-domain enclosed in the tree structure within the ‘domain.’<\/p>\n

Popular real-life examples would be news.google.com, mail.yahoo.com and en.wikipedia.org. In which news, mail and en are subdomains, respectively.<\/p>\n

 <\/p>\n

If you curious about what difference between add-on, parked domain and sub domain, you may refer this article<\/a>.<\/p>\n

 <\/p>\n","protected":false},"excerpt":{"rendered":"

What is Sub-Domain?   In the Domain Name Server (DNS) hierarchy, a sub-domain is a domain that is part of a broader domain name. A DNS hierarchy consists of the highest root-level domain, the first-level domain below followed by second-level domains and subdomains at last. Valid sub-domains as defined in RFC 1034 that contain any letter or number as well…<\/p>\n","protected":false},"author":1,"featured_media":0,"comment_status":"closed","ping_status":"closed","template":"","meta":{"footnotes":""},"kbtopic":[11],"kbtag":[1255],"class_list":["post-2337","kb","type-kb","status-publish","hentry","kbtopic-general-email","kbtag-sub-domain"],"_links":{"self":[{"href":"https:\/\/www.servergigabit.com\/guide\/wp-json\/wp\/v2\/kb\/2337","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/www.servergigabit.com\/guide\/wp-json\/wp\/v2\/kb"}],"about":[{"href":"https:\/\/www.servergigabit.com\/guide\/wp-json\/wp\/v2\/types\/kb"}],"author":[{"embeddable":true,"href":"https:\/\/www.servergigabit.com\/guide\/wp-json\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/www.servergigabit.com\/guide\/wp-json\/wp\/v2\/comments?post=2337"}],"version-history":[{"count":8,"href":"https:\/\/www.servergigabit.com\/guide\/wp-json\/wp\/v2\/kb\/2337\/revisions"}],"predecessor-version":[{"id":6335,"href":"https:\/\/www.servergigabit.com\/guide\/wp-json\/wp\/v2\/kb\/2337\/revisions\/6335"}],"wp:attachment":[{"href":"https:\/\/www.servergigabit.com\/guide\/wp-json\/wp\/v2\/media?parent=2337"}],"wp:term":[{"taxonomy":"kbtopic","embeddable":true,"href":"https:\/\/www.servergigabit.com\/guide\/wp-json\/wp\/v2\/kbtopic?post=2337"},{"taxonomy":"kbtag","embeddable":true,"href":"https:\/\/www.servergigabit.com\/guide\/wp-json\/wp\/v2\/kbtag?post=2337"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}