Top U.S. Ad Networks, February 2009

By Enid Burns, ClickZ, Mar 27, 2009

The top spots in comScore's AdFocus rankings, which tracks ad networks and Web properties, showed little movement from January. Platform-A captured 173 million unique visitors; Yahoo saw 163 million uniques; and ValueClick served 157 million uniques. Specific Media came up a spot (143 million uniques), taking a space previously occupied by Yahoo sites. Google came up two pegs (141 million uniques), displacing Tribal Fusion and Traffic Marketplace.

Microsoft consolidated its ad network properties under Microsoft Media Network U.S., dropping the DRIVEpm identity. In February It held at 123 million unique visitors. In January DRIVEpm had 126 million uniques. In all, the number of unique visitors to each network, and percent reach to all properties, tended to be smaller than in January.

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

Top 50 U.S. Ad Networks by Unique Visitor, February 2009
Rank	Ad Network	Unique Visitors (000)	Reach (%)	Rank	Ad Network	Unique Visitors (000)	Reach (%)
	Total	192,187	100
1	Platform-A**	172,618	90	26	AdBrite**	82,008	43
2	Yahoo network**	163,406	85	27	YouTube	81,306	42
3	ValueClick Networks**	157,753	82	28	Vibrant Media**	75,291	39
4	Google Ad Network**	156,481	81	29	Undertone Networks**	75,143	39
5	Yahoo sites	144,304	75	30	YuMe Video Network	74,858	39
6	Specific Media**	142,774	74	31	Monster Career Ad Network**	74,515	39
7	Google	140,863	73	32	Centro	73,307	38
8	Traffic Marketplace**	139,372	73	33	National Newspaper Network: total U.S. newspapers	71,664	37
9	Tribal Fusion**	137,876	72	34	Ask Network	71,343	37
10	24/7 Real Media**	137,409	71	35	TattoMedia**	71,262	37
11	Tremor Media	132,219	69	36	MySpace.com	70,297	37
12	Casale Media-MediaNet**	131,982	69	37	Pulse 360**	68,035	35
13	interCLICK***	125,403	65	38	Kontera**	64,108	33
14	Adconian Media Group	124,792	65	39	Gorilla Nation	63,647	33
15	Microsoft Media Network U.S.**	123,363	64	40	ITN Digital Networks	61,336	32
16	CPX Interactive**	122,323	64	41	Adify**	58,714	31
17	Turn Inc**	121,483	63	42	IAC Ad Solutions	58,425	30
18	ADSDAQ (ContextWeb)**	116,489	61	43	Facebook	57,375	30
19	Collective Network**	113,284	59	44	eBay	53,239	28
20	Burst Media**	108,692	56	45	MSN.com	53,023	28
21	Revenue Science**	108,259	56	46	Glam Media	51,121	27
22	MSN Windows Live	107,495	56	47	Amazon.com	50,067	26
23	Digital Broadcasting Group	106,408	55	48	National Newspaper Network: top 25 newspapers	49,112	26
24	AOL Media Network	105,016	55	49	Business.com	47,501	25
25	BrightRoll Video Network	94,218	49	50	Snap Shots Network**	46,101	24
Notes: 1. Reach denotes the percentage of the total Internet population that viewed a particular entity at least once in February. 2. ** denotes an advertising network. 3. 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