Top ad carriers in January, 2009

Rank Property Unique Visitors (000) Reach %
  Total Audience 191,863 100%
1 Platform-A 174,586 91%
2 Yahoo! Network 164,712 86%
3 ValueClick Networks 160,261 84%
4 Google Ad Network 158,481 83%
5 Traffic Marketplace 146,903 77%
6 Yahoo! Sites 146,131 76%
7 Specific Media 145,929 76%
8 Tribal Fusion 143,869 75%
9 Google 143,116 75%
10 24/7 Real Media 141,604 74%
11 Tremor Media – Potential Reach 136,867 71%
12 Casale Media – MediaNet 136,772 71%
13 Turn, Inc 132,949 69%
14 Adconion Media Group 130,717 68%
15 interCLICK 126,706 66%
16 CPX Interactive 125,764 66%
17 DRIVEpm 125,255 65%
18 ADSDAQ by ContextWeb 121,022 63%
19 Revenue Science 114,122 59%
20 Digital Broadcasting Group 111,698 58%
21 MSN-Windows Live 111,695 58%
22 Collective Network 111,322 58%
23 Burst Media 109,043 57%
24 AOL Media Network 108,441 57%
25 BrightRoll Video Network 98,179 51%
26 AdBrite 89,649 47%
27 YOUTUBE.COM 82,772 43%
28 Centro – Potential Reach 81,559 43%
29 Vibrant Media 79,908 42%
30 MYSPACE.COM 75,639 39%
31 NNN Total Newspapers: U.S. 74,800 39%
32 Ask Network 74,742 39%
33 Pulse 360 71,075 37%
34 Gorilla Nation Media 68,684 36%
35 IAC Ad Solutions 66,759 35%
36 Undertone Networks 66,083 34%
37 Career Ad Network 65,936 34%
38 ITN Digital Networks 65,705 34%
39 Kontera 64,928 34%
40 TattoMedia 61,677 32%
41 IB Local Network 58,414 30%
42 EBAY.COM 57,520 30%
43 Adify 57,380 30%
44 FACEBOOK.COM 57,232 30%
45 MSN.COM Home Page 56,481 29%
46 Glam Media 55,293 29%
47 AMAZON.COM 54,562 28%
48 NNN Top 25 52,326 27%
49 Business.com Network 51,586 27%
50 QuadrantONE 47,754 25%
Source: comScore