- Broadnet Teleservices
- 16972 people
- United States (Highlands Ranch)
The largest telephone conference call included 16,972 participants in an event organised by Broadnet Teleservices (USA), in Highlands Ranch, Colorado, USA, on 12 December 2012. All the participants were on the call concurrently for at least 10 seconds. The original number of participants was higher but had to be reduced after a second electronic check was carried out.