Theoretically, Calliflower can support 944 simultaneous conference callers whether they participate in the same conference call or not. However, restrictions do apply. Calliflower can support:

• 20 simultaneous callers calling in via Skype.
• 70 simultaneous callers calling via our international dialing network.
• Hundreds of simultaneous callers calling via our Minnesota POP at 218-936-6581.

Ordinarily, callers use some combination of the above, and when one dial-in method is full, another is often available. If your conference call has exceeded the number above callers will be told there are no more local dial in numbers available and they should call in using the 218-936-6581 dial in number.

The largest call we know of on the system is 191 callers, which was a conference call used to organize voters during the last US presidential election. However our infrastructure is highly scalable and capacity can be added. If you plan on having a large conference call, let us know so we can take the appropriate measures: contact us.