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If I observe the domain:

http is the protocal

www is a subdomain

google is the second level domain

com is the top level domain

Is there a specific term that would describe

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marked as duplicate by Iain, RobM, TheCleaner, Ward, pauska Oct 14 '13 at 23:20

This question has been asked before and already has an answer. If those answers do not fully address your question, please ask a new question.… – Iain Oct 14 '13 at 21:03
www. is not a subdomain if it is a host (*). Also any domain that is part of a larger domain in the tree is a subdomain. google is a subdomain of .com – JamesRyan Oct 14 '13 at 21:11
* it could be argued that it is both a hostname and subdomain. But definately A subdomain rather than THE subdomain – JamesRyan Oct 14 '13 at 21:17

You've already answered your own question. would commonly be referred to as a second-level domain name.

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From wikipedia for second level domain: "in, example is the second-level domain of the .com TLD." – K2xL Oct 14 '13 at 21:08
@K2xL right, I think you're reading the wikipedia article a little too literally. The google portion can be called a second-level domain, I suppose, but it's useless without knowing the TLD. I've never heard anyone refer to a second-level domain and only mean the piece to the left of the TLD. – MDMarra Oct 14 '13 at 21:21

"Naked domain". Also, in DNS terms - "zone apex"

Also, "second level domain". You wrongly assume that "example" part in "" may be called second-level domain. The whole "" is a domain, and it is a second-level domain."example" would be second label in the domain name. "com" is a first (rightmost) label.

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Parent Domain which is the combination of the Second Level Domain and the Top level domain

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Wouldn't be a FQDN? – K2xL Oct 14 '13 at 21:02
Thanks, update, my understanding was that would be classed as an FQDN and a little research confirmed that, although with comments and proper research I was wrong – Sam Leach Oct 14 '13 at 21:20

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