This turns out to be the number of a company that sets up 'conference calls' so that a number of people can be on line together and everyone can hear and speak to the others. When a 1-hr call showed up on my phone bill to Redfield So Dakota I was unable to identify it at first. My phone carrier was able to help. Perhaps the Redfield company provides other services as well. Don't know about that
The number appeared on our phone bill twice (6/3 & 6/10) without a clear clarification as to source. I have to assume this was a conference call generated by n2 Publication. I no longer work with n2 Pubs.