If this is part of a specific project or a file you are trying to locate on a certain platform, could you let me know (like GitHub, a specific forum, or a pastebin) or what software it's intended for?
Based on the naming convention (43k IPv6 addresses, a username like "bobo4545," and a date of December 7th), this appears to be a private data log, a proxy list, or a specialized network configuration file that isn't publicly indexed. 43k ipv6 bobo4545 12-07.txt