(1xxx) Line Officers
Fully Warfare Qualified Unrestricted Line (URL)
111X URL Officer qualified as a Surface Warfare Officer.
112X URL Officer qualified as a Submarine Warfare Officer.
113X URL Officer qualified as a Special Warfare Officer (SEAL).
114X URL Officer qualified as an Explosive Ordnance Disposal Officer.
130X URL Officer previously qualified Naval Aviator or Naval Flight Officer. 131X URL Officer qualified Naval Aviator.
132X URL Officer qualified Naval Flight Officer.
Non-Warfare Qualified Unrestricted Line (URL) Officers
110X General URL Officer without warfare qualifications
Training Designators For Unrestricted Line Officers
116X URL Officer in training for Surface Warfare Officer qualification.
117X URL Officer in training for Submarine Warfare Officer qualification.
118X URL Officer in training for Special Warfare qualification.
119X URL Officer in training for Special Operations EOD/Diver qualification.
137X URL Officer in training for Student Naval Flight Officer.
139X URL Officer in training for Student Naval Aviator.
Restricted Line (RL) Officer designators
121X RL Officer – Nuclear Propulsion Training Officer.
122X RL Officer – Nuclear Engineering Officer (Naval Reactors Engineer).
1230 RL Officer – Permanent Military Professor.
144X RL Officer – EDO who is qualified as a Ship Engineering specialist.
150X RL Officer – Aerospace Engineering Duty Officer.
151X RL Officer – Aerospace Engineering Duty Officer, Engineering (AEDO).
152X RL Officer – Aerospace Engineering Duty Officer, Maintenance.
154X RL Officer – Aviation Duty Officer (ADO Naval Aviator).
Restricted Line Special Duty (RL SD) Officers
120X RL SD Officer – (Special Duty) Human Resources Officer.
165X RL SD Officer – (Special Duty Officer) Public Affairs Officer.
166X RL SD Officer – (Special Duty Officer) Strategic Sealift Officer (SSO).
168X RL SD Officer – (Special Duty Officer) Reserve Recruiting.
170X RL SD Officer – (Special Duty Officer) Fleet Support Officer.
171X RL SD Officer – (Special Duty Officer) Foreign Area Officer (FAO).
180X RL SD Officer – (Special Duty Officer) Meteorology/Oceanography.
181X RL SD Officer – (Special Duty Officer) Cryptologic Warfare Officer.
182X RL SD Officer – (Special Duty Officer) Information Professional Officer. 183X RL SD Officer – (Special Duty Officer) Intelligence Officer.
184X RL SD Officer – (Special Duty Officer) Cyber Warfare Engineer.
186X RL SD Officer – (Special Duty Officer) IWC Flag Officer.
184X RL SD Officer – (Special Duty Officer) Cyber Warfare Engineer.
186X RL SD Officer – (Special Duty Officer) IWC Flag Officer
Training designators For Restricted Line (RL) and Restricted Line Special Duty (RL SD) Officers
146X RL Officer – in training for Engineering Duty Officer (EDO).
172X RL SD Officer – in training for Foreign Area Officer (FAO).
(2xxx) Staff Corps Designators
210X Medical Corps Officer
220X Dental Corps Officer
230X Medical Service Corps Officer
250X Judge Advocate General’s Corps Officer
270X Senior Health Care Executive Officer
290X Nurse Corps Officer
310X Supply Corps Officer
410X Chaplain Corps Officer
510X Civil Engineer Corps (i.e., Seabee) Officer
(6xxx) Limited Duty Officers
611X Deck (Surface).
612X Operations (Surface).
613X Engineering/Repair (Surface).
615X Special Warfare
616X Ordnance (Surface).
618X Electronics (Surface).
620X Nuclear Power (General) (NOTE: Formerly designator 640X).
621X Deck (Submarine).
623X Engineering/Repair (Submarine).
626X Ordnance (Submarine).
628X Electronics (Submarine).
629X Communications (Submarine).
630X Aviator (Aviation).
631X Deck (Aviation).
632X Operations (Aviation).
633X Maintenance (Aviation).
636X Ordnance (Aviation).
639X Air Traffic Control (Aviation).
641X Administration (General).
643X Bandmaster (General).
647X Photography (General).
648X Explosive Ordnance Disposal (General).
649X Security (General).
Limited Duty Staff Corps Officers (by Community)
651X Supply Corps.
653X Civil Engineer Corps.
655X Law (Judge Advocate General’s Corps).
Limited Duty Line Officers (Information Warfare Community)
680X Meteorology/Oceanography (NOTE: Formerly designator 646X).
681X Cryptologic Warfare (NOTE: Formerly designator 644X).
682X Information Professional (NOTE: Formerly designator 642X).
683X Intelligence (NOTE: Formerly designator 645X).
(7xxx) Warrant Officers
Line Chief Warrant Officers (by Community)
711X Boatswain (Surface)
712X Operations Technician (Surface)
713X Engineering Technician (Surface)
715X Special Warfare Technician (Expeditionary Warfare)
716X Ordnance Technician (Surface)
717X Special Warfare
718X Electronics Technician (Surface)
720X Diving Officer (Submarine)
721X Boatswain (Submarine)
723X Engineering Technician (Submarine)
724X Repair Technician (Submarine)
726X Ordnance Technician (Submarine)
728X Acoustics Technician (Submarine)
731X Boatswain (Aviation)
732X Operations Technician (Aviation)
733X Maintenance Technician (Aviation).
736X Ordnance Technician (Aviation)
740X Nuclear Power Technician (General).
741X Ship’s Clerk (General)
748X Explosive Ordnance Disposal Technician (General).
749X Security Technician (General)
Staff Corps Chief Warrant Officers (by Community)
751X Supply Corps.
752X Food Service (Supply Corps)
753X Civil Engineering (Civil Engineer Corps)
756X Technical Nurse (Nurse Corps)
Line Chief Warrant Officers (Information Warfare Community)
780X Oceanography
781X Cryptologic Warfare Technician (NOTE: Formerly designator 744X).
782X Information Systems Technician (NOTE: Formerly designator 742X).
783X Intelligence Technician (NOTE: Formerly designator 745X).
784X Cyber (NOTE: Formerly designator 743X).
Source: https://en.wikipedia.org/wiki/List_of_United_States_naval_officer_designators