Tundra Swan - Banded

I have seen various postings of birds that had some type of bands that were visible from a distance, not just the metal bands around the leg. Today, while driving the auto tour at Ridgefield National Wildlife Refuge I noticed that several of the Tundra Swans had neck bands. Some of them were close enough that I was able to get readable pictures.
I remember reading a posting by Greg Gillson that discussed how to report these sightings. I assume these birds have already been reported at this location as it is a popular birding area, but I thought I might as well report it anyway, if for no other reason than for the experience.
I'm not sure what it all means, but they wanted the number, the color of the band and the color of the number. I suppose it provides more combinations without creating a long number that is less likely to be seen or remembered.