NX

AT: "xx"

The NX registry of the USS Defiant

For the class of starship, please see NX class.

NX was a registry prefix first used by the United Earth Starfleet for their NX-class starships in the mid-22nd century. (ENT: "Broken Bow", "Fortunate Son"). After the founding of the United Federation of Planets in 2161, this prefix was used for experimental and prototype starship designs. (Star Trek III: The Search for Spock) In the Mirror Universe, this prefix was used by the Terran Empire for their NX-class starships. (ENT: "In a Mirror, Darkly") Two centuries later, this prefix was used by the Terran Resistance Forces for their Defiant-class starship. (DS9: "Shattered Mirror") Ships that use the NCC and the NX prefix are listed in the Starfleet Registry. (TOS: "The Ultimate Computer")

NX registries

Ship Name	Registry	Class	Dates	Reference
none	NX-Alpha	NX-class prototype	2143	ENT: "First Flight"
none	NX-Beta	NX-class prototype	2143	ENT: "First Flight"
none	NX-Delta	NX-class prototype	2144	ENT: "First Flight"
Enterprise	NX-01	NX-class	2151-2161	ENT: "Broken Bow"
Columbia	NX-02	NX-class	2154	ENT: "The Expanse", "E²"
Challenger NX-03	NX-03	NX-class	2151	ENT: "Fortunate Son"
Discovery NX-04	NX-04	NX-class	2151	ENT: "Fortunate Son"
USS Excelsior	NX-2000/NCC-2000	Excelsior-class	2285	Star Trek III: The Search for Spock
USS Constellation	NX-1974	Constellation-class	2293	Star Trek VI: The Undiscovered Country
USS Bradbury	NX-72307	Bradbury-class	2366	TNG: "Ménage à Troi"
USS Defiant	NX-74205	Defiant-class	2370-2375	DS9: "The Search, Part I", "The Changing Face of Evil"
USS Defiant	NX-74205	Defiant-class	2375	DS9: "The Dogs of War"
USS Prometheus	NX-59650 NX-74913	Prometheus-class	2374	VOY: "Message in a Bottle"

Alternate registries

Ship Name	Registry	Class	Dates	Note	Reference
USS Yellowstone	NX-74751	Runabout	2372	From an alternate timeline	VOY: "Non Sequitur"
USS Dauntless	NX-01-A NX-01A	Dauntless-class	2374	Arturis's disguised vessel	VOY: "Hope and Fear"

Mirror universe NX registries

Ship Name	Registry	Class	Dates	References
ISS Enterprise	NX-01	NX-class	2155	ENT: "In a Mirror, Darkly"
ISS Avenger	NX-09	NX-class	2155	ENT: "In a Mirror, Darkly, Part II"
ISS Defiant	NX-74205	Defiant-class	2372-2375	DS9: "Shattered Mirror", "The Emperor's New Cloak"

External link

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