You can use the warband search to find a particular warband, or limit/sort the player display by certain criteria:
Limit the search to a certain location.
If you want to find warbands whose names contain a string, enter it here. The string entered is case-insensitive.
Clan Tag Search
To find all warbands in a certain clan, use this option.
Use this option to list all warbands whose owners are currently online.
By default, only 25 warbands will be listed in any search query. You can up this limit in the 'Maximum Results' box.