Source = Webmasterworld forums
Bold = No longer working
Others = Live
Currently there's a Google update going on, but it's a bit hard to track as Google have removed the DNS entries for the datacenters. Do a backwards link check on your site to see if you gained or lost links.
The OLD Google Datacenter IP's
www-ab.google.com. 60 IN A 216.239.51.100
www-cw.google.com. 60 IN A 216.239.57.100
www-dc.google.com. 60 IN A 216.239.39.100
www-ex.google.com. 60 IN A 216.239.33.100
www-fi.google.com. 60 IN A 216.239.41.100
www-gv.google.com. 60 IN A 216.239.59.100
www-in.google.com. 60 IN A 216.239.53.100
www-kr.google.com. 60 IN A 66.102.11.100
www-lm.google.com. 60 IN A 66.102.9.100
www-mc.google.com. 59 IN A 66.102.7.100
www-sj.google.com. 60 IN A 216.239.35.100
www-va.google.com. 60 IN A 216.239.37.100
www-zu.google.com. 60 IN A 216.239.55.100
The NEW Google Datacenter IP's
Here are the new ones - the naming convention follows the first three octets of the old DC's:
www-ab: 216.239.51.100 DEFUNCT 2004-01-25
new1-ab: http://216.239.51.99/ www.google.akadns.net
new2-ab: http://216.239.51.102/
new3-ab: http://216.239.51.103/
new4-ab: http://216.239.51.104/
new5-ab: http://216.239.51.105/
new6-ab: http://216.239.51.147/
www-cw: 216.239.57.100 DEFUNCT 2004-01-25
new1-cw: http://216.239.57.98/
new2-cw: http://216.239.57.99/
new3-cw: http://216.239.57.104/ www2.google.com www3.google.com
new4-cw: http://216.239.57.105/
www-dc: 216.239.39.100 DEFUNCT 2004-01-25
new-dc1: http://216.239.39.98/
new-dc2: http://216.239.39.99/ www.google.akadns.net
new-dc3: http://216.239.39.102/
new-dc4: http://216.239.39.103/
new-dc5: http://216.239.39.104/
new-dc6: http://216.239.39.105/
new-dc7: http://216.239.39.147/
www-ex: http://216.239.33.100 OK 2004-01-25
new1-ex: http://216.239.33.98/
new2-ex: http://216.239.33.99/
new3-ex: http://216.239.33.101/
new4-ex: http://216.239.33.102/
new5-ex: http://216.239.33.103/
new6-ex: http://216.239.33.104/
new7-ex: http://216.239.33.105/
www-fi: 216.239.41.100 DEFUNCT 2004-01-25
new1-fi: http://216.239.41.98/
new2-fi: http://216.239.41.99/ www.google.akadns.net
new3-fi: http://216.239.41.102/
new4-fi: http://216.239.41.103/
new5-fi: http://216.239.41.104/
new6-fi: http://216.239.41.105/
www-gv: 216.239.59.100 DEFUNCT 2004-01-25 (New: 2003-08-01)
new1-gv: http://216.239.59.98/
new2-gv: http://216.239.59.99/
new3-gv: http://216.239.59.102/
new4-gv: http://216.239.59.103/
new5-gv: http://216.239.59.104/
new6-gv: http://216.239.59.105/
www-in: 216.239.53.100 DEFUNCT 2004-01-25
new1-in: http://216.239.53.98/
new2-in: http://216.239.53.99/
new3-in: http://216.239.53.104/
new4-in: http://216.239.53.105/
www-kr: 66.102.11.100 DEFUNCT 2004-01-25 (New: 2003-09-01)
new1-kr: http://66.102.11.99/
new2-kr: http://66.102.11.99/
new3-kr: http://66.102.11.104/
www-lm: http://66.102.9.100 OK 2004-01-25 (New: 2003-10-23)
new1-lm: http://66.102.9.99/
new2-lm: http://66.102.9.101/
new3-lm: http://66.102.9.104/
www-mc: 66.102.7.100 DEFUNCT (2004-10-20)
new1-mc: http://66.102.7.98/
new2-mc: http://66.102.7.99/
new3-mc: http://66.102.7.99/
new4-mc: http://66.102.7.102/
new5-mc: http://66.102.7.104/
new6-mc: http://66.102.7.105/
new7-mc: http://66.102.7.147/
www-sj: 216.239.35.100 DEFUNCT (2003-10-17)
new-sj: no new-sj
www-va: 216.239.37.100 DEFUNCT 2004-01-25
new1-va: http://216.239.37.98/
new2-va: http://216.239.37.99/ www.google.akadns.net
new3-va: http://216.239.37.102/
new4-va: http://216.239.37.103/
new5-va: http://216.239.37.104/ www.google.akadns.net
new6-va: http://216.239.37.105/
new7-va: http://216.239.37.147/ www.google.akadns.net
www-zu: 216.239.55.100 DEFUNCT (2004-10-20)
new1-zu: http://216.239.55.104/
Note: The www.google.akadns.net notes where Google front-end (www.google.com) have been observed recently - www2 and www3 are IP's for those DCs.
The NEW Google Directory IP's
The naming convention is the same as for the DC's:
directory-ab1: http://216.239.51.106/
directory-ab2: http://216.239.51.107/
directory-cw1: http://216.239.57.106/
directory-cw2: http://216.239.57.107/
directory-dc1: http://216.239.39.106/
directory-dc2: http://216.239.39.107/
directory-ex1: http://216.239.33.106/
directory-ex2: http://216.239.33.107/
directory-in1: http://216.239.53.106/
directory-in2: http://216.239.53.107/
directory-va1: http://216.239.37.106/
directory-va2: http://216.239.37.107/
What does this mean?
Well, if nothing else, it's probably the end of so-called "Google Dance Tools" - it's a bit hard to make a readable 60+ frames frameset ;) Some/most/all of these are no doubt front-ends used for load-balancing.