- Platform-A ( Advertising.com )
- Yahoo! Network
- Google Ad Network
- ValueClick Networks
- Specific Media
- FOX Audience Network
- 24/7 Real Media
- Traffic Marketplace
- Microsoft Media Network US
- Tribal Fusion
- Casale Media – MediaNet
- interCLICK
- Turn, Inc
- Adconion Media Group
- CPX Interactive
- Collective Network by Collective Media
- ADSDAQ by ContextWeb
- AudienceScience (formerly RevenueScience)
- Burst Media
- Undertone Networks
- AdBrite
- Pulse 360
- Vibrant Media
- Adify
- Kontera
Source: April 2009 comScore Media Metrix