ComScore published a list of top ad carriers in February 2007.
| Top Internet ad carriers in February 2007 | ||
| Ad carrier | Audience, 000 | Reach, % |
| Total Internet Users | 175,653 | 100% |
| Advertising.com | 149,094 | 85% |
| ValueClick | 128,754 | 73% |
| Yahoo! | 126,484 | 72% |
| Casale Media Network | 113,193 | 64% |
| Tribal Fusion | 111,285 | 63% |
| AOL Media Network | 108,939 | 62% |
| 107,977 | 61% | |
| Vendare NetBlue | 103,909 | 59% |
| MSN-Windows Live | 96,658 | 55% |
| Blue Lithium | 92,011 | 52% |
| DRIVEpm | 91,925 | 52% |
| Specific Media | 90,851 | 52% |
| 24/7 Real Media | 89,750 | 51% |
| AOL | 88,867 | 51% |
| YAHOO.COM Home Page | 85,892 | 49% |
| PrecisionClick | 75,983 | 43% |
| Tremor Media | 74,944 | 43% |
| EuroClick | 73,620 | 42% |
| EBAY.COM | 71,027 | 40% |
| Burst Media | 70,262 | 40% |
| AdBrite | 65,646 | 37% |
| MYSPACE.COM | 64,443 | 37% |
| Gorilla Nation Media | 61,091 | 35% |
| MSN.COM Home Page | 51,222 | 29% |
| Ask Network | 48,722 | 28% |
| ContextWeb | 44,903 | 26% |
| AdDynamix.com | 44,685 | 25% |
| EBAY.COM Home Page | 44,583 | 25% |
| CPX Interactive | 43,443 | 25% |
| Vibrant Media | 41,413 | 24% |
| YOUTUBE.COM | 34,413 | 20% |
| ABOUT.COM | 34,273 | 20% |
| Interclick | 32,355 | 18% |
| Undertone Networks | 28,224 | 16% |
| WEATHER.COM | 27,829 | 16% |
| Business.com Network | 24,665 | 14% |
| CNN | 22,915 | 13% |
| Lycos Network | 22,192 | 13% |
| Disney Online | 21,959 | 13% |
| CareerBuilder Network | 21,577 | 12% |
| WebMD | 19,012 | 11% |
| IMDB.COM | 18,980 | 11% |
| EXPEDIA.COM | 17,745 | 10% |
| Local Media Network | 16,866 | 10% |
| FACEBOOK.COM | 16,737 | 10% |
| WEATHER.COM | 16,728 | 10% |
| PHOTOBUCKET.COM | 15,883 | 9% |
| WhitePages Network | 15,289 | 9% |
| SuperPages.com Network | 15,225 | 9% |
| ESPN | 15,207 | 9% |
| Source: ComScore | ||