What will be Moon's prefix?

Did you know that NASA was building a base of operations in the south pole of the Moon? Did you know colonists would be living and working there? Did you know that plans are in motion to establish a satellite phone network which would allow said colonists to communicate with one another? Well, it's all true... and more! According to a report, NASA and the British National Space Centre (BNSC) are preparing a trial phone network to be deployed on the Moon. The system, called MoonLite, will be comparable to the satellite phone networks of the 80's and 90's here on Earth, and will be used to facilitate communication between occupants on the base and robots and workers which are out and about. The satellites will handle data as well as voice communication, with 3kbps downstream and 2kbps up. The test network will be available as of 2012, but the final version will be ready only in 2020. The latter is also the date for the deployment of the moon base. The network will use one or two satellites, which will only cover the polar region. There are many things yet unclear about the project and of course the most important decision is yet to be taken: what will be the prefix of the new network provider?