Plaxo
| Company type | Subsidiary of Comcast | 
|---|---|
| Founded | November 2002 | 
| Founder | Sean Parker, Todd Masonis and Cameron Ring | 
| Defunct | 2017-12-31 | 
| Headquarters | Sunnyvale, California | 
| Key people | Justin Miller, President & CEO | 
Plaxo was an online address book that launched in 2002. It was a subsidiary of cable television company Comcast from 2008 to 2017. At one point it offered a social networking service.