¿How can I use this information?

Neverwinter Nights 1 -> In Neverwinter Nights folder you can find a file named nwnplayer.ini, if you open this file you can add this IPs in [History Page] or [Favorites Page] section.

Neverwinter Nights 2 -> In My Documents at Neverwinter Nights 2 folder, you can find a file named nwnplayer.ini, if you open this file you can add this IPs in [History Page] or [Favorites Page] section.

When play the game in a multiplayer sesion you will find all servers in your History Page or Favorites Page.

NWN1 have a limitation, only can browse 20 servers at History Page and 30 servers at Favorites Page.