Google PR. About Google datacenters, continuation...
Where you a Google datacenters?
However as it was possible search in Internet if experiment with addresses gfe-XX.google.com, adding to them various digits, for example gfe-XX2.google.com or gfe-XX3.google.com we shall receive interesting dependence, addresses gfe-XX2.google.com conduct on IP addresses with the ending 99, and addresses gfe-XX3.google.com on IP with the ending 147. Except for that some from these interesting domains have also own aliases. So for example domains gfe-XX.google.com frequently (but not always) have aliases XX-in-f104.google.com, for gfe-XX2.google.com frequently meet aliases XX-in-f99.google.com, thus for domains gfe-XX3.google.com, aliases for type XX-in-f147.google.com - find out was not possible. What conclusions from this follow?
At first Google datacenters have addresses of type gfe-XX.google.com, such addresses (possible variants) is possible count 676 pieces.
At second for each address space of class CCC exists only three datacenters, and they have IP addresses ending on 99, 104 and 147. Possible variants proceeding from address spaces belonging Google can be only (see the table in the first part of article) - 354.
Base datacenter for each block of class ССС, by the it domain determiningis the datacenter with IP ending on 104 and withdrawn on the domain of type gfe-XX.google.com or XX-in-f104.google.com, second on the importance (duplicating) datacenter is the datacenter with IP the address ending on 99 and withdrawn on domains of type gfe-XX2.google.com or XX-in-f99.google.com and most likely the third, reserve datacenter is the datacenter on 147 address and withdrawn on gfe-XX3.google.com or XX-in-f147.google.com - but there are those not always and are most likely created only in сases of overload of two (base and additional) datacenters in the same block CCC class.
We determine working Google datacenters
How them to determine? Simple list of all values, we shall determine all possible values for gfe-XX.google.com, such addresses as it was already mentioned - 676 pieces. We shall scan each received value for presence for it IP addresses, after such elimination (is not present IP - hence there is no also and datacenter). At us order remain only 49 basic addresses of Google datacenters.
The simple manipulation with its - we shall receive from its values Page Rank for our site. Here it is necessary to note that during last update PR has changed with 3 to 5 and this change has not settled yet on all datacenters, is convenient - whether it will be possible to see at once are available differences between the data from one CCC a range... That we shall receive:
| # | gfe-XX.google.com | Base IP (CCC block) | 104 IP | PR | 99 IP | PR | 147 IP | PR |
| 1 | ed | 72.14.219 | work/alias | 5 | work/alias | 5 | work/alias | 5 |
| 2 | eh | 72.14.207 | work | 5 | work | 5 | none | - |
| 3 | an | 209.85.133 | work | 5 | work | 5 | work | 5 |
| 4 | ff | 66.249.85 | work | 5 | work | 5 | none | - |
| 5 | fg | 72.14.221 | work | 5 | work | 5 | work | 5 |
| 6 | fk | 209.85.129 | work | 5 | work | 5 | work | 5 |
| 7 | ar | 72.14.223 | work | 3 | work | 3 | work | 3 |
| 8 | gv | 216.239.59 | work | 5 | work | 5 | work | 5 |
| 9 | he | 66.102.1 | work | 5 | work | 5 | none | - |
| 10 | hk | 64.233.189 | work | 5 | none | - | none | - |
| 11 | au | 72.14.211 | work | 5 | work | 5 | none | - |
| 12 | hs | 64.233.179 | work/alias | 5 | work/alias | 5 | none | - |
| 13 | hu | 72.14.215 | work/alias | 3 | work/alias | 3 | none | - |
| 14 | Ik | 66.249.91 | work/alias | 5 | work/alias | 5 | work/alias | 5 |
| 15 | Im | 209.85.153 | none | - | none | - | none | - |
| 16 | In | 216.239.53 | work/alias | 5 | work/alias | 5 | work/alias | 5 |
| 17 | jc | 64.233.187 | work | 5 | work | 5 | none | - |
| 18 | jp | 66.249.89 | none | - | none | - | none | - |
| 19 | kc | 216.239.51 | none | - | none | - | none | - |
| 20 | kr | 66.102.11 | none | - | none | - | none | - |
| 21 | lm | 66.102.9 | none | - | none | - | none | - |
| 22 | lo | 66.249.87 | none | - | none | - | none | - |
| 23 | bf | 72.14.209 | work | 5 | work | 5 | none | - |
| 24 | mc | 66.102.7 | work | 5 | work | 5 | work/alias | 5 |
| 25 | mu | 209.85.135 | work/alias | 5 | work/alias | 5 | work | 5 |
| 26 | nf | 64.233.183 | work/alias | 3 | work/alias | 3 | work/alias | 3 |
| 27 | nz | 64.233.163 | work/alias | 3 | work/alias | 3 | none | - |
| 28 | od | 64.233.161 | work | 5 | work | 5 | work | 5 |
| 29 | po | 72.14.253 | work/alias | 5 | work | 5 | work | 5 |
| 30 | pr | 209.85.139 | work | 5 | work | 5 | work/alias | 5 |
| 31 | bp | 216.239.63 | work | 5 | work | 5 | none | - |
| 32 | py | 64.233.167 | work | 5 | work | 5 | work | 5 |
| 33 | qb | 72.14.205 | work/alias | 5 | work/alias | 5 | none | - |
| 34 | rn | 64.233.171 | work | 5 | work | 5 | work | 5 |
| 35 | ro | 72.14.203 | work | 3 | work | 3 | none | - |
| 36 | bu | 72.14.217 | work | 5 | work | 5 | none | - |
| 37 | bx | 66.249.81 | work | 5 | work | 5 | work | 5 |
| 38 | td | 72.14.255 | work | 5 | work | 5 | work | 5 |
| 39 | tI | 209.85.143 | work | 5 | work | 5 | work | 5 |
| 40 | tw | 72.14.235 | work | 5 | work | 5 | work | 5 |
| 41 | ug | 66.249.93 | work/alias | 5 | work | 5 | work | 5 |
| 42 | uI | 64.233.179 | work/alias | 5 | work/alias | 5 | none | - |
| 43 | va | 216.239.37 | work | 5 | work | 5 | none | - |
| 44 | wr | 64.233.185 | work/alias | 5 | work/alias | 5 | none | - |
| 45 | wx | 66.249.83 | work | 5 | work | 5 | none | - |
| 46 | ag | 72.14.247 | work | 5 | work | 5 | work | 5 |
| 47 | yo | 64.233.169 | work | 5 | work | 5 | none | - |
| 48 | cw | 216.239.57 | work | 5 | work | 5 | work | 5 |
| 49 | dc | 216.239.39 | work | 5 | work | 5 | none | - |
How many datacenters Google have?
What do we see? We see only 49 domains having appropriated by it IP addresses. From them 6 do not respond on suggest of PageRank. I.e. we possible assume that it new datacenters prepared, but not started in operation (be wait...) And there are in total only 43 working Google datacenters. Differently a myth about 100, 300, etc. it is discredited.
Except as was already mentioned to all addresses from one block CCC we see absolutely identical values of PageRank. Except for that as we also assumed - ranging of datacenters on the importance occurs in the order: 104 IP, then 99 IP and then 147 IP. As confirmation that is served that fact, what even in 99 address the server of datacenter not always works (see a line 10), in 147 address it in general works farly from being always, and only in 104 address - it always efficient. So, we shall finish:
43 working Google Inc. datacenters
Is here:
The tool for check PageRank of any page of your site, it possible find here: check PageRank from datacenters
Recently ceased to work datacenter: gfe-yo.google.com with IP address: 64.233.169.104.
