It sounds like it was misreporting itsself as the player's IP address?
We have had over 200,000 unique GUIDs connect on our CoD4 servers which are on .194, .195 and .198 and over 100,000 unique GUIDs connect to our CoD5 servers on .194, .196 and .197. We go through a lot of players everyday, so having that many hits as a bug wouldn't surprise me at all and would actually seem low.