A WebmasterWorld thread reports that some users are seeing the URL webcache.googleusercontent.com being used for the Cache link in the Google search results. Typically, Google does not use a name based URL for the cache link, such as google.com or the one above. Typically, Google would use an IP address.
But some users are spotting webcache.googleusercontent.com being used instead of the IP address.
If you try going to webcache.googleusercontent.com it will actually load a Google search page. Google is the owner of googleusercontent.com and currently, webcache.googleusercontent.com's IP address for me is 74.125.45.132, which is the same IP I see being used when I click on a cache link in Google.
I have never seen this domain being mentioned before either. I guess it would make things cleaner to use a domain for the cache URL.
Forum discussion at WebmasterWorld.

Comments:
vikas uttam
04/06/2010 11:53 am
I think it would be google's database where database of all the cached websites is listed.Is my guess is correct.Plz suggest me
vikas uttam
04/06/2010 11:53 am
I think it would be google's database where database of all the cached websites is listed.Is my guess is correct.Plz suggest plz
vickytrends
04/06/2010 11:57 am
I think it would be google's database where database of all the cached websites is listed.Is my guess is correct.Plz suggest plz
Alok
04/08/2010 07:03 am
I think this is better way to manage a web service because there is very easier to manage a domain address with respect to an IP address for and maintenance work.
rita
05/12/2010 05:54 pm
I have a question. which one is better. using IP or by URL. Or which one secured.
Same
06/14/2010 01:37 pm
Hello I have read Google Cache URLs To Be webcache.googleusercontent.com this article related to webmaster cache gudie, i fell good article but please suggest me in which method we increase site keyword position.
Same
06/14/2010 01:38 pm
Hello I have read Google Cache URLs To Be webcache.googleusercontent.com this article related to webmaster cache gudie, i fell good article but please suggest me in which method we increase site keyword position.
Dattatray Aware
02/13/2011 04:25 am
Hello I have read Google Cache URLs To Be webcache.googleusercontent.com this article related to webmaster cache gudie, i fell good article but please suggest me in which method we increase site keyword position. Flag http://www.nashikgreps.com
Tad Miller
02/16/2011 03:25 pm
Weird. I just found that URL in an Adwords Placement Performance Report. They are apparently serving ads on these pages through the Google Display Network.
Lakme0303
03/05/2011 09:02 pm
I think it would be google's database where database of all the cached websites is listed.Is my guess is correct.Plz suggest me www.webhostinglamp.com
Mikekojo
06/14/2011 02:37 pm
HOW ARE U DOING? I HOPE ALL IS WELL, PLS DO CONTACT ME HERE; mikekojo@mail.am
Mikekojo
06/14/2011 02:38 pm
vikas uttam,HOW ARE U DOING? I HOPE ALL IS WELL, PLS DO CONTACT ME HERE; mikekojo@mail.am
bernie lambo
06/21/2011 10:15 am
can't you help with me,,,,,,, bcoz my adventure quest worlds has been failed? can't u help me :(
bernie lambo
06/21/2011 10:17 am
Ohhhh!!!! Nooo!!!! I Have No Idea To Download aqw EVERYONE!!! CAN'T YOU HELP ME?? Bcoz,,,IM LOSING AQWORLDS
Jim
07/02/2011 06:15 pm
i'm getting the "googleusercontent" message when trying to see the cache on my site. It gives me an error msg. that reads cache:DYx3Q-BxpTM: and then my site address, followed by the comment, "did not match any documents" i don't get it???
Anneshuck
07/09/2011 08:12 pm
HELP!!! I cleaned/defragged my laptop and now my files from a website (Stickley drawings) cannot be recovered. Have I "wiped out" my files completely - or can they be recovered somehow? I cannot get into my account and the drawings are gone.
Justin Freid
07/24/2011 07:59 pm
According to Alexa googleusercontent.com is the 32nd most accessed URL in the world: http://jstnfrd.com/nKSk18, and Google apparently generates subdomains assigned to different servers to manage the heavy traffic it receives. With Google+'s large field test underway, it seems like a good, clean way to share the influx really great user generated content like this: http://jstnfrd.com/rhBsf7
Enrique4s
08/13/2011 05:17 am
help please i see this site webcache.googleusercontent.com is using my adsense Ads on it, webcache.googleusercontent.com Unauthorized siteswhat is this? help please!!!
Cindy Toolsie
08/23/2011 11:40 pm
can I get current tv/countdown at 8pm here?
Moustafa Mohamed
08/26/2011 12:40 pm
my websit in Google cashe not full apper why http://www.sookmsr.com/ http://webcache.googleusercontent.com/search?q=cache:www.sookmsr.com
Manish Singh
09/05/2011 05:20 am
I have read Google Cache URLs To Be webcache.googleusercontent.com this article related to webmaster cache gudie, http://www.bestsolutionofit.com/
Drtoddk
09/08/2011 04:38 pm
http://www.google.com/safebrowsing/diagnostic?site=googleusercontent.com it is NOT owned by google, it is a malware hosting site
☮ Bart
12/06/2011 07:56 am
And how reliable is that source? Reliable, because it's Google? Look what other website is a malware hosting site: http://www.google.com/safebrowsing/diagnostic?site=google.com
sara1861
12/29/2011 08:39 pm
Google has a hole in their software. A criminal is running amok and stealing everything he can.I have an Honors Degree In Mathematics and Astronomy. I was an engineer on the Saturn V. I worked for a company that was a contractor for the Trident Nuclear Missile Submarine. My book is in the Smithsonian and I have spoken to the U.S. Naval Academy. Just to let you know that I understand the problem.It is impossible to reach Google. Even if I could, they would ignore it. "There is Nothing is So Blind as a Person with Eyes Who Cannot See."My friends and colleagues understand very well. I have proof which is ignored. Look at me as the kid with the finger in the hole of the dike.
Baveruth
02/20/2012 10:36 pm
I dont have any comment with regards to this page. . . for me it help a lot in searching a friend in different people in the world.
Baveruth
02/20/2012 10:36 pm
no comment
Atlantis
05/16/2012 09:02 pm
it is OWNED by google. Install no-script add-on and visit gmail. Then you'll know what I mean.
endsbowen
07/18/2012 02:16 pm
Do I block this or not? Currently I have it blocked on opendns.
amynator
12/26/2012 06:56 pm
I just saw that on my website, I was wondering what it meant? http://www.ficksitall.blogspot.com
vikas uttam
01/05/2013 05:11 pm
Who are you?
BloggerQueen61
04/02/2013 07:59 pm
Well, I have not been a good girl on the net in my younger days so there may be stuff on there that others who know me are looking for and that's when I spotted this link connected to a childhood friend of mine who is trying to scare me into thinking the FBI is watching me! LOL!