Akamai is a content delivery network. They have servers all over the world which mirrror static content. Even facebook makes use of them.
For example:
Here is a link to CSS stylesheet used by facebook:
http://static.ak.fbcdn.net/rsrc.php/z7629/l/qn4w7u7o/en_US/167934/css/ie7.css
(to check go to facebook and view the source code of the page should see the link relatively at the top)
Now lets do a dns test:
Code:
david@wadavid ~ $ dig static.ak.fbcdn.net
; <<>> DiG 9.6.0-P1 <<>> static.ak.fbcdn.net
;; global options: +cmd
;; Got answer:
;; ->>HEADER<<- opcode: QUERY, status: NOERROR, id: 45772
;; flags: qr rd ra; QUERY: 1, ANSWER: 4, AUTHORITY: 0, ADDITIONAL: 0
;; QUESTION SECTION:
;static.ak.fbcdn.net. IN A
;; ANSWER SECTION:
static.ak.fbcdn.net. 3368 IN CNAME static.ak.facebook.com.edgesuite.net.
static.ak.facebook.com.edgesuite.net. 15927 IN CNAME a749.g.akamai.net.
a749.g.akamai.net. 20 IN A 196.33.166.210
a749.g.akamai.net. 20 IN A 196.33.166.201
;; Query time: 32 msec
;; SERVER: 196.220.32.1#53(196.220.32.1)
;; WHEN: Tue Jun 30 10:12:16 2009
;; MSG SIZE rcvd: 144
As you can see, it resolves to a local ip on IS's network.
Here is a short traceroute as well.
Code:
david@wadavid ~ $ traceroute static.ak.fbcdn.net
traceroute: Warning: static.ak.fbcdn.net has multiple addresses; using 196.33.166.201
traceroute to a749.g.akamai.net (196.33.166.201), 30 hops max, 52 byte packets
1 untangle-e1i1.wacpt.net (10.5.1.251) 0.253 ms 0.216 ms 0.206 ms
2 e-4.lr1.hopestr.cpt.za.wacpt.net (10.254.254.254) 0.871 ms 0.847 ms 0.846 ms
3 e-1.fr1.gw.cpt.za.wadns.net (196.220.63.237) 1.355 ms 1.172 ms 1.231 ms
4 e-0.cr1.gw.cpt.za.wadns.net (196.220.63.225) 1.643 ms 2.287 ms 3.674 ms
5 wa-bgp2.wadns.net (196.220.39.251) 1.992 ms 1.610 ms 1.669 ms
6 cpt-acc-agg-vlan18.frogfoot.net (196.1.59.57) 2.217 ms 2.059 ms 2.588 ms
7 cpt-br-tra-carp.frogfoot.net (196.1.56.57) 4.370 ms 3.382 ms 4.705 ms
8 vlan567.hr1.cpt1.za.mtnbusiness.net (66.8.22.57) 4.873 ms 3.979 ms 3.265 ms
9 ge8-0-0.gw1.cpt1.za.mtnbusiness.net (196.30.176.33) 4.915 ms 5.661 ms 5.799 ms
10 atm0-1-0sub1.cr5.jnb6.za.mtnbusiness.net (196.31.39.38) 33.677 ms 36.150 ms 38.507 ms
11 196.30.1.7 (196.30.1.7) 37.656 ms 34.059 ms 39.737 ms
12 ge0-2.cr1.jnb7.za.mtnbusiness.net (196.30.121.101) 37.334 ms 38.353 ms 38.679 ms
13 ge0-2.br1.jnb7.za.mtnbusiness.net (196.30.228.121) 31.653 ms 37.247 ms 34.821 ms
14 as3741.rba.is.co.za (196.30.228.242) 34.535 ms 36.642 ms 32.520 ms
15 csw4-rba-gi8-4.ip.isnet.net (196.26.0.249) 32.229 ms 31.658 ms 34.009 ms
16 a196-33-166-201.deploy.akamaitechnologies.com (196.33.166.201) 31.039 ms 32.171 ms 32.076 ms
Basically Blizzard also makes use of Akamai for content delivery for the game files. I can't remember but when I was using the downloaded I did a "netstat" in the command prompt and saw connections to local servers (specifically akamai), only thing that was open was the downloader...
Try it, if you see it goes over international bw, just stop your download, but I am fairly certain it will go over local, only problem is you do need internation for the blizzard downloader to get the info from their servers overseas.