Several applications trying to connect to IP
All these applications need the DNS (Domain Name System) to translate Internet names into their IP address, and the reverse.

The IP you found are the one of the DNS servers of Verizon.
The following command will show it clearly:

 dig -x 151.205.0.101


Your udp and tcp exiting traffic toward DNS port = 53 should be permitted.

Fix your Little Snitch configuration so that all your DNS traffic could pass.