Top U.S. Ad Networks, April 2009

The top five ad networks held their place in April, according to data listing ad networks and ad-supported properties from comScore‘s Ad Focus Rankings. Unique visitors remained somewhat flat, lifting only slightly from March levels.

MSN.com reappeared on the list at number 26 with 111.8 million unique visitors in April. Gorilla Nation dropped from the rankings. The ad rep firm had held the rank of 29 in March, with a unique audience of 83.3 million. With the ads Gorilla Nation accounted for, it had increased its reach from 33 percent in February to 43 percent in March. In April it was somewhere below 26 percent.

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

Top 50 U.S. Ad Networks by Unique Visitor, April 2009
Rank Ad Network Unique Visitors (000) Reach (%) Rank Ad Network Unique Visitors (000) Reach (%)
Total 192,875 100
1 Platform-A** 176,455 91 26 MSN Windows Live 111,783 58
2 Yahoo network** 167,129 87 27 AOL Media Network 107,469 56
3 Google Ad Network** 164,518 85 28 BrightRoll Video Network 99,911 52
4 ValueClick Networks** 160,307 83 29 Undertone Networks** 97,053 50
5 Specific Media** 158,012 82 30 AdBrite** 91,033 47
6 Fox audience network** 149,249 77 31 YouTube* 89,697 47
7 Yahoo sites 149,118 77 32 Pulse 360** 82,574 43
8 Google 148,511 77 33 Vibrant Media** 80,779 42
9 24/7 Real Media** 147,668 77 34 Centro 75,551 39
10 Traffic Marketplace** 143,519 74 35 National Newspaper Network: total U.S. newspapers 74,415 39
11 Tremor Media 141,971 74 36 Ask Network 73,491 38
12 Microsoft Media Network (U.S.)** 139,674 72 37 Adify** 73,467 38
13 Tribal Fusion** 138,274 72 38 Kontera** 72,870 38
14 Casale Media MediaNet** 137,884 71 39 Monster Career Ad Network 72,225 37
15 interCLICK** 134,834 70 40 MySpace.com* 70,954 37
16 YuMe 134,608 70 41 Facebook 67,481 35
17 Turn Inc** 134,028 69 42 ITN Networks 66,578 35
18 Adconion Media Group** 133,498 69 43 Tattoo Media** 63,379 33
19 CPX Interactive** 130,370 68 44 MSN.com 57,753 30
20 Collective Network** 129,808 67 45 IAC Ad Solutions 57,650 30
21 ADSDAQ (ContextWeb)** 123,534 64 46 eBay 56,319 29
22 Platform-A video network 121,949 63 47 Glam Media 54,485 28
23 AudienceScience (formerly RevenueScience)** 121,001 60 48 Amazon.com 52,058 27
24 Burst Media** 116,727 61 49 National Newspaper Network: top 25 newspapers 50,644 26
25 Digital Broadcasting Group 112,646 56 50 Business.com 48,692 25
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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