Server_log.txt questions?

[cmosboss]

So this is not actually related to this package but I can't seem to find anywhere on the internet where anyone references this except this git repo. I am doing some research on the server_log.txt file for dota and I am wondering one thing

This is an expert from a log

09/25/2018 - 22:20:55: =[A:1:3453375493:11109] (Lobby 25801973213187259 DOTA_GAMEMODE_ALL_DRAFT 0:[U:1:100783749] 1:[U:1:39347851] 2:[U:1:48764881] 3:[U:1:14875011] 4:[U:1:101114880] 5:[U:1:901676338] 6:[U:1:49697106] 7:[U:1:34782480] 8:[U:1:93456258] 9:[U:1:52528482] 10:[U:1:78029867]) (Party 25801973150832442 0:[U:1:49697106] 1:[U:1:34782480] 2:[U:1:93456258] 3:[U:1:52528482] 4:[U:1:78029867])

I understand everything in this except the first bit "A:1:3453375493:11109" I know that it is something relating to the server but I cant tell what.... its not an ip4 address, its not an ipv6 address. Does anyone know what that is and what it denotes? Any info would be awesome.

Note #4 and @eVen-gits

[su1cidal]

@cmosboss did you find anything about that?