18.104.22.168 is allowed because it's an IP address? Not sure what's wrong with that... It's a valid IP they own and they've obviously tried to find a nice easy to remember one. I used to use 22.214.171.124 in emergencies a long time ago - now 126.96.36.199 can top the list.
We do keep some location information (at the city/metro level) so that we can conduct debugging, analyze abuse phenomena and improve the Google Public DNS prefetching feature. We don't correlate or combine your information from these logs with any other log data that Google might have about your use of other services, such as data from Web Search and data from advertising on the Google content network. After keeping this data for two weeks, we randomly sample a small subset for permanent storage.