Top US ad carriers in September 2008

1 Platform-A 171,692 91%
2 Yahoo! Network 161,996 86%
3 Google Ad Network 156,355 83%
4 Specific Media 153,435 81%
5 ValueClick Networks 150,395 79%
6 Tribal Fusion 141,850 75%
7 Yahoo! 140,200 74%
8 Google 136,219 72%
9 Traffic Marketplace 131,458 69%
10 YuMe Video Network 130,238 69%
11 24/7 Real Media 128,775 68%
12 Casale Media – MediaNet 128,585 68%
13 Tremor Media – Potential Reach 128,060 68%
14 Adconion Media Group 122,632 65%
15 interCLICK 121,987 64%
16 Revenue Science 120,899 64%
17 DRIVEpm 113,162 60%
18 CPX Interactive 111,847 59%
19 ADSDAQ by ContextWeb 109,570 58%
20 Collective Media 109,489 58%
21 MSN-Windows Live 109,274 58%
22 AOL Media Network 108,349 57%
23 Burst Media 101,493 54%
24 Turn, Inc 101,462 54%
25 Undertone Networks 85,722 45%
26 Centro – Potential Reach 83,921 44%
27 AdBrite 79,853 42%
28 YOUTUBE.COM 75,389 40%
29 NNN Total Newspapers: U.S. 73,880 39%
30 Vibrant Media 73,323 39%
31 MYSPACE.COM 73,035 39%
32 Gorilla Nation Media 64,303 34%
33 Ask Network 62,101 33%
34 Kontera 58,809 31%
35 Pulse 360 58,559 31%
36 MSN.COM Home Page 57,457 30%
37 EBAY.COM 55,476 29%
38 ITN National Broadband Networks 54,905 29%
39 Ybrant – Oridian – ADdynamix Network 53,993 28%
40 IB Local Network 53,645 28%
41 IAC Ad Solutions – Potential Reach 52,405 28%
42 NNN Top 25 51,222 27%
43 Intergi – Potential Reach 48,929 26%
44 Business.com Network 47,174 25%
45 QuadrantONE – Potential Reach 46,403 24%
46 AMAZON.COM 45,980 24%
47 TattoMedia 44,894 24%
48 MapQuest 44,588 24%
49 AdOn Network 43,719 23%
50 NNN Top 10 42,032 22%
Source: comScore