Since the end of the In The Zome season, I have seen several teams change their team numbers after they have already registered.
For example, 32641A changed to 3131V (seemingly before ITZ Worlds), and 3023A-C all changed to 2672A-C (after registering for Turning Point).
How does a team go about changing their number after registering? Is it free?
And does anyone know if the previous number becomes available for other teams if you do this on all teams with the old number?
If the team has previously competed under the other number, it changes to the new number in team lists, award lists, and Skills results, but not in match results or rankings (these stay the same on the event page and do not appear on the team page), or anywhere on VexDB (these stay the same, but change if the event data is updated afterwards).
I do not recommend changing your number if you have had success before, unless you really dislike your number, and you have a good number picked out for your new one.