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nc(1) on macOS

The text dccc7f3e48f2, as OS X 10.10.5, OS X 10.10.4, OS X 10.10.3, OS X 10.10.2, OS X 10.10.1, OS X 10.10, OS X 10.9.5, OS X 10.9.4, OS X 10.9.3, OS X 10.9.2, OS X 10.9.1, OS X 10.9 shipped it.

arbitrary TCP and UDP connections and listens

Flags it lists

nc(1) on macOS now