According to DNS and WHOIS, news.ycombinator.com is hosted at ThePlanet.com Internet Services, Inc.
Since "where are YC funded companies hosted" is a common question, I'll answer that too, based on the list of YC-funded companies at http://www.ycombinator.com/faq.html:
8 Amazon.com, Inc.
6 SoftLayer Technologies Inc.
4 ThePlanet.com Internet Services, Inc.
2 NoZone, Inc.
1 BitPusher, LLC
1 Columbus Network Access Point, Inc.
1 Global Netoptex, Inc
1 Layered Technologies, Inc.
1 Performance Systems International Inc.
1 RackForce Hosting Inc.
1 ServePath, LLC
1 Slicehost LLC
1 Time Warner Telecom, Inc.
I made a little bit more robust version. Some of the whois calls (like heroku.com) have 2 OrgName lines and some don't have one at all (like weebly.com).
Amazon.com, Inc. 7
youos.com
jamglue.com
shoutfit.com
socialmoth.com
webmynd.com
heroku.com
8aweek.com
SoftLayer Technologies Inc. 5
scribd.com
xobni.com
anywhere.fm
bountii.com
disqus.com
ThePlanet.com Internet Services, Inc. 5
snipshot.com
virtualmin.com
heysan.com
adpinion.com
reble.fm
Hurricane Electric 3
weebly.com
octopart.com
auctomatic.com
Internap Network Services 2
loopt.com
likebetter.com
NoZone, Inc. 2
flagr.com
thinkature.com
Peer 1 Network Inc. 2
rescuetime.com
addher.com
ServePath, LLC 1
reddit.com
American Digital Network 1
fuzzwich.com
Columbus Network Access Point, Inc. 1
versionate.com
Performance Systems International Inc. 1
justin.tv
Global Netoptex, Inc 1
clickfacts.com
RackForce Hosting Inc. 1
draftmix.com
Time Warner Telecom, Inc. 1
textpayme.com
Logicworks Corporation 1
inklingmarkets.com
Layered Technologies, Inc. 1
buxfer.com
Rackspace.com, Ltd. 1
iminlikewithyou.com
BitPusher, LLC 1
wufoo.com
Slicehost LLC 1
tipjoy.com
There's the wikipedia list also, which used to have all of them, them several wikipedians insisted on "notability" so it's much less complete than it once was.
Is that what happened to the Wikipedia article? I thought the list used to be more comprehensive.
The "News" link on YC points here, so I assume this is intended to be the place for YC company headlines, but I wish there was a more traditional "Press" or similar page on the YC site to track news about and announcements from the participants. An alternative would be some type of parameterized link filtering the results for relevance, but in its current form it just dumps one into the news pool here (which presently looks like _another_ company's Press section!).