Top U.S. Ad Networks, March 2009

Ad networks and other properties listed in comScore‘s Ad Focus Rankings shifted in the month of March.

New to the top 50 in March were Fox Audience Network, which entered in the ninth position with an audience of 140.9 million uniques, and Platform-A Video Network, which ranked 21st with 118.9 million unique visitors. Gone from the top 50 were MSN.com and Snap Shots Network, which had been ranked 45 and 50 respectively in February. Gorilla Nation increased its reach from 33 percent in February to 43 percent in March. In doing so it moved from a rank of 39 to 29 in the same time period.

ComScore measures Internet usage from a global panel of home, work, and university Internet users.

Top 50 U.S. Ad Networks by Unique Visitor, March 2009
Rank Ad Network Unique Visitors (000) Reach (%) Rank Ad Network Unique Visitors (000) Reach (%)
Total 192,173 100
1 Platform-A** 173,772 90 26 AOL Media Network 104,416 54
2 Yahoo network** 165,578 86 27 BrightRoll Video Network 95,654 50
3 Google Ad Network** 160,762 84 28 AdBrite** 86,444 45
4 ValueClick Networks** 156,662 82 29 Gorilla Nation 83,323 43
5 Yahoo sites 146,059 76 30 Undertone Networks** 82,797 43
6 Google 143,570 75 31 YouTube* 82,691 43
7 24/7 Real Media** 141,728 74 32 YuMe Video Network 76,074 40
8 Traffic Marketplace** 141,078 73 33 Vibrant Media** 75,681 39
9 Fox Audience Network** 140,922 73 34 Centro 74,206 39
10 Tribal Fusion** 137,627 72 35 Pulse 360** 73,804 38
11 Tremor Media 136,277 71 36 Ask Network 72,798 38
12 Specific Media** 135,643 71 37 National Newspaper Network: total U.S. newspapers 72,064 37
13 Casale Media – MediaNet** 135,056 70 38 MySpace.com* 70,147 37
14 interCLICK** 131,595 68 39 Adify** 69,027 36
15 CPX Interactive** 129,230 67 40 Kontera** 65,996 34
16 Adconian Media Group** 127,445 66 41 Monster Career Ad Network 65,658 34
17 Turn Inc** 125,805 65 42 TattoMedia** 64,731 34
18 Microsoft Media Network U.S.** 123,192 64 43 ITN Digital Networks 63,104 33
19 Collective Network** 121,731 63 44 Facebook 61,224 32
20 ADSDAQ (ContextWeb)** 118,929 62 45 IAC Ad Solutions 57,292 30
21 Platform-A Video Network 118,872 62 46 eBay 54,946 29
22 Audience Science (formerly Revenue Science)** 114,904 60 47 Glam Media 52,220 27
23 Burst Media** 110,313 57 48 Amazon.com 51,688 27
24 MSN Windows Live 108,025 56 49 National Newspaper Network: top 25 newspapers 49,557 26
25 Digital Broadcasting Group 107,953 56 50 Business.com 49,369 26
Notes:
1. Reach denotes the percentage of the total Internet population that viewed a particular entity at least once in August.
2. ** denotes an advertising network.
3. * denotes entity has assigned some portion of traffic to other syndicated entities.
4. The Platform A ad network is an aggregation of ad servers used by the following individual advertising network entities: Advertising.com, Tacoda, AOL, Quigo, and Userplan.
Source: comScore, 2009

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