Advertising.com's network reached 87 percent of online Americans in May. That's according to the Ad Focus rankings data released by comScore Networks.

With 87 percent reach, Advertising.com's ad network saw over 155 million unique visitors in May. Other ad networks ranking high in reach include ValueClick (73 percent); Tribal Fusion (68 percent); Casale Media Network (67 percent); and Blue Lithium (66 percent).

Yahoo (73 percent); Google (64 percent); AOL Media Network (64 percent); and MSN and Windows Live (56 percent) also ranked high in the Ad Focus rankings.

ComScore Global Network maintains a panel with more than two million participants. It combines the panel with statistical methodology to project findings for the total population for a particular segment.

U.S. Ad Focus Ranking by Unique Visitor, May 2007
Rank	Property	Unique Visitors (000)	Reach (%)		Rank	Property	Unique Visitors (000)	Reach (%)
	Total Internet users	177,487	100
1	Advertising.com**	155,258	87		26	Gorilla Nation Media	61,266	35
2	Yahoo	129,287	73		27	Vibrant Media**	56,169	32
3	ValueClick**	129,034	73		28	ContextWeb**	54,514	31
4	Tribal Fusion**	120,987	68		29	Undertone Networks**	52,811	30
5	Casale Media Network**	118,593	67		30	MSN.com	50,156	28
6	Blue Lithium**	116,612	66		31	Ask Network	50,068	28
7	Google	113,854	64		32	eBay home page	46,891	26
8	AOL Media network	113,759	64		33	Interclick**	42,876	24
9	Connexus Traffic Marketplace**	104,266	59		34	YouTube	41,035	23
10	Specific Media**	100,053	56		35	Business.com network	40,576	23
11	MSN Windows Live	98,625	56		36	About.com	38,348	22
12	DRIVEpm**	92,196	52		37	Real Cities network	28,885	16
13	AOL	91,597	52		38	Weather.comCOM	28,445	16
14	Yahoo home page	90,974	51		39	Facebook	26,649	15
15	24/7 Real Media**	87,406	49		40	Nickelodeon Kids & Family	22,974	13
16	adconion media group**	81,119	46		41	CareerBuilder network	22,178	12
17	PrecisionClick**	80,311	45		42	CNN	21,657	12
18	Tremor Media	76,932	43		43	IMDb	21,465	12
19	CPX Interactive**	76,822	43		44	SuperPages.com network	20,956	12
20	Centro	75,307	42		45	Lycos network	20,737	12
21	BurstMedia**	71,864	40		46	Disney Online	20,127	11
22	eBay	71,508	40		47	photobucket	20,068	11
23	AdBrite**	69,390	40		48	Yellowpages.com network	19,826	11
24	MySpace	68,939	39		49	ARTISTdirect network	19,168	11
25	AdDynamix**	64,530	39		50	WhitePages.com network	17,702	10
Notes 1. Reach denotes the percentage of the total Internet population that viewed a particular entity at least once in May. 2. * means the entity has assigned some portion of traffic to other syndicated entities. 3. ** denotes an advertising network.
Source: comScore, 2007

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