Top 50 US ad carriers in October 2008

Rank Property Audience, 000 Reach
1 Platform-A 173,713 91%
2 Yahoo! Network 164,080 86%
3 Google Ad Network 158,928 83%
4 ValueClick Networks 155,356 82%
5 Specific Media 150,176 79%
6 Tribal Fusion 144,354 76%
7 Yahoo! 143,089 75%
8 Traffic Marketplace 140,302 74%
9 Google 138,767 73%
10 24/7 Real Media 135,528 71%
11 Tremor Media – Potential Reach 135,222 71%
12 Casale Media – MediaNet 135,054 71%
13 Adconion Media Group 130,650 69%
14 YuMe Video Network 130,247 68%
15 interCLICK 129,477 68%
16 Revenue Science 127,186 67%
17 DRIVEpm 123,594 65%
18 Turn, Inc 117,016 61%
19 CPX Interactive 116,817 61%
20 Collective Media 113,336 59%
21 ADSDAQ by ContextWeb 113,320 59%
22 AOL Media Network 111,259 58%
23 MSN-Windows Live 110,615 58%
24 Burst Media 105,962 56%
25 AdBrite 90,165 47%
26 YOUTUBE.COM 80,877 42%
27 Centro – Potential Reach 80,225 42%
28 MYSPACE.COM* 76,257 40%
29 Vibrant Media 76,000 40%
30 NNN Total Newspapers: U.S. 74,797 39%
31 Undertone Networks 74,641 39%
32 Ask Network 70,449 37%
33 Gorilla Nation Media 68,483 36%
34 Kontera 64,468 34%
35 IAC Ad Solutions 64,422 34%
36 Pulse 360 60,430 32%
37 MSN.COM Home Page 57,617 30%
38 Ybrant – Oridian – ADdynamix 56,291 30%
39 EBAY.COM 55,436 29%
40 IB Local Network 54,747 29%
41 NNN Top 25 52,482 28%
42 TattoMedia 51,659 27%
43 ITN Digital Networks 51,633 27%
44 AMAZON.COM 49,102 26%
45 Business.com Network 47,322 25%
46 Intergi – Potential Reach 46,861 25%
47 QuadrantONE 46,233 24%
48 MapQuest 46,049 24%
49 FACEBOOK.COM 45,954 24%
50 AdOn Network 44,095 23%
Source: comScore