I know there are lists out there with all the codes for Nassau County, but what about those codes that are not on the Nassau County Radio Code sheet...you know, those codes only used by a few departments??

I added those codes to this list. If you know of any more, please let me know.

The sources for the frequencies are as follows:
Fordyce.org Long Island Scanner Resources
Scanner Master NY Metro/NNJ Communication Guide - 7th ed.
Nassau FD Rant
......And members like you!!!

Nassau County Radio Signals
Signal	Description	In Use By (Department)
1	All Units Eliminate Unnecessary Transmissions	Nassau Standard
2	Un-Assigned -- Reserved For Future Use	Nassau Standard
3	Unit Involved In Accident - Personnel Injured	Nassau Standard
3	Invalid in the House	Massapequa
4	Unit Disabled - Need Assistance	Nassau Standard
5	Activate Traffic Signal - Open Doors	Nassau Standard
6	Stand By For Orders Where You Are	Nassau Standard
7	Release Men In Stations	Nassau Standard
8	Still Alarm - Grass, Oil Burner Or Car Fire	Nassau Standard
8B	Brush or Rubbish Fire	Hicksville
8C	Car Fire	Hicksville
8H	Oil Burner Fire (Heating)	Hicksville
9	Emergency Or Rescue Call	Nassau Standard
9A	Ambulance Call	Not on the Standard List
9A	Fireman's Family	Valley Stream
10	Working Building Fire Or Emergency Clear The Air	Nassau Standard
11	Call By Land Phone At Your Convenience	Nassau Standard
12	Fire Under Control - Resume Normal Radio Use	Nassau Standard
12A	Remove Scott Air Packs ??	Not on the Standard List
12A	Respond no lights or sirens	Syosset
13	Return To Quarters -- Or -- Returning To Quarters	Nassau Standard
14	Call Police - Routine Traffic Control Or Reports	Nassau Standard
14A	Call Police Ambulance	Nassau Standard
14F	Call Fire Department Ambulance	Hicksville
14M	Call Police - Mental Disabled	Nassau Standard
14R	Call Police Rescue	Nassau Standard
15	Radio Check (5 X 5 Loud And Clear) (3 X 3 Weak And Unclear)	Nassau Standard
16	Call Doctor	Nassau Standard
17	Unit Not Available For Duty	Nassau Standard
17D	No Chauffers	Hicksville
17M	No Manpower	Hicksville
18	Unit Available For Duty	Nassau Standard
18H	Unit is Secure In House	Hicksville
19	Unit Leaving District	Nassau Standard
19D	Chief Leaving District - For District Work	Not on the Standard List
19W	Chief Leaving District - Leaving for Work	Not on the Standard List
20	Unit Returning To District	Nassau Standard
21	Unit Responding To Scene	Nassau Standard
21F	First Fire Unit Responding (To Be used by Dispatcher)	Hicksville
22	Unit Arrived At Scene	Nassau Standard
22H	Engine at Scene on Hydrant	North Massapequa
22H	Ambulance Arrived at Hospital	Not on Standard List
23	Message Received	Nassau Standard
24	Call Fire Marshal - Routine	Nassau Standard
25	Call Fire Marshal - Immediate Investigation	Nassau Standard
25D	Call Fire Marshal - Immediate - Death At Scene	Nassau Standard
25HM	Call Fire Marshal - Haz Mat Response Team	Nassau Standard
26	Call Health Department	Nassau Standard
27	Call Utility - E-Elec; G-Gas; H-Highway; R-Lirr; W-Water	Nassau Standard
28	Call For Refilling Air Bottles At Scene	Nassau Standard
29	Call Chaplain (C-Catholic; J-Jewish; P-Protestant)	Nassau Standard
30	Call For Refreshments At Scene	Nassau Standard
31	Fuel Needed At Scene -- Or Stopping For Fuel	Nassau Standard
32	Sound General Alarm - Reinforce Initial Response	Nassau Standard
32	Send Assistance / Mutual Aid	Massapequa
33	Request Mutual Aid	Nassau Standard
34	Invalid In Building	Nassau Standard
35	Switch From Battalion Frequency To County-Wide (46.10)	Nassau Standard
36	Switch From County-Wide Frequency To Battalion Frequency	Nassau Standard
36	Dispatcher working calls for both 630 and 660	Massapequa/N.Mass
37	Switch To Mobile-To- Mobile Frequency (Or Cb Sets, Walkie Talkie)	Nassau Standard
38	Training Or Drill	Nassau Standard
39	Verify Location Of Alarm	Nassau Standard
40	Give Your Location -- Or Location Of Alarm	Nassau Standard
41	All Units At Scene Sound Horns - Firemen Leave Building	Nassau Standard
42	Mass Casualty Incident	Nassau Standard
43-48	Unassigned - Reserved For Future Use	Nassau Standard
49	Obvious D.O.A. - For Ems Units	Nassau Standard
50	Call Police - Dangerous Situation Or Civil Disturbance	Nassau Standard
51-60	Un-Assigned - Reserved For Future Use	Nassau Standard
60	Signal 10 but no chief on scene	Massapequa
61-70	Available For Any Use	Nassau Standard
61	Co. Unable To Respond / No Response From Co.	Manhasset / Lakeville
61	Cardiac Related	Oceanside / Rockville Centre / E. Rockaway
61	Chief's Call - Report to Respective Stations	Hicksville
61	Unit is responding to NUMC	East Meadow
62	Difficulty Breathing	Oceanside
62	All Available Police Unit Members Respond To The Scene	Manhasset / Lakeville
62	Standby Needed at HQ	Hicksville
63	Fireman's Familiy	Oceanside / Massapequa
63	Unit Out Of Service	Manhasset / Lakeville
63	Hazardous Road Conditions	Hicksville
64	Social Activity	Massapequa
64	Unit Back in Service	Manhasset / Lakeville
64	Passing Apparatus	Hicksville
65	Hazmat Team Respond to Scene	Hicksville
66	Call came from FireCom	Not on the Standard List
66	Fireman's Family	North Massapequa
66	AMT Responding	Hicksville
66	Automatic Alarm	N. Bellmore / Bellmore / N. Merrick Merrick / Lakeview
67	Gas Leak	Not on the Standard List
68	Fireman's Family	East Meadow / Levittown
68	Switch to High Band Frequency	Hicksville
69	Bomb Scare	Long Beach
70	Fireman's Family	Hicksville / Lynbrook
70	Automatic Alarm	Lawrence / Cedarhurst / Woodmere
70	Working Car Fire	Uniondale
70	Special Dept. Response Signal	Hicksville
71	Automatic Alarm	Long Beach / Island Park
71	Company Meeting	Nassau Standard
72	Company Drill Or Training	Nassau Standard
72B	Company Drill Or Training At The F.S.A.	Nassau Standard
73	Rescue Company Or Squad Meeting	Nassau Standard
74	Rescue Company Or Squad Training Or Drill	Nassau Standard
74B	Rescue Company Or Squad Training Or Drill At The F.S.A.	Nassau Standard
75	Officers Meeting	Nassau Standard
76	Department Meeting	Nassau Standard
77	Department Drill Or Training	Nassau Standard
77B	Department Drill Or Training At The F.S.A.	Nassau Standard
78	Funeral Or Memorial Service	Nassau Standard
79	Drill Team Meeting Or Practice	Nassau Standard
80	Parade	Nassau Standard
80	No Chauffeur	Long Beach
81	Assistant Fire Inspectors Meeting	Nassau Standard
81	Personnel Status 1	Long Beach
82	Fund Drive	Nassau Standard
82	Personal Status 2	Long Beach
83	Chauffeur Or M.P.O. Training	Nassau Standard
83	Personal Status 3	Long Beach
84	Clean Up	Nassau Standard
85	Uniform Inspection Or Fitting	Nassau Standard
86	Blood Drive	Nassau Standard
87	Physical Exam	Nassau Standard
88	Softball Game Or Practice	Nassau Standard
88	Chauffer and Officer only Responding	N. Massapequa
89	Picnic Or Outing	Nassau Standard
90	Tour Of Firecom	Nassau Standard
91	Indefinite - Available For Any Usenassau	Nassau Standard
91	Fireman Aided / Fireman's Property	Roslyn
91	Fireman's Family	Elmont / Island Park
97	Given by 1st Due Ladder/1st Due Rescue instead of 22	Port Washington
97	Manpower Needed	Manhasset / Lakeville
98	Given by 2nd Due Engine instead of 22	Port Washington
98	Smoke Showing/Small Room Fire/First Due Key Hydrant	Not on the Standard List
98	Helicopter Landing	Island Park
98	AMT/EMT Needed	Manhasset / Lakeville
99	Investigation	Massapequa
99	Cardiac Arrest/CPR in Progress	Port Washington / Manhasset / Lakeville
99	Department Member's House	Unknown Department
99	Water Rescue	Long Beach/Island Park
100	Extrication Call	Long Beach/Island Park

Hempstead Fire Department Radio Signals
Signal	Description
5	Activate HQ traffic signal
10	Contact Dispatcher
11	Report to location
12	Respond to scene with caution
12A	Respond to scene with caution w/o siren
13	False Alarm/return to HQ
14	Clear the scene when all apparatus is ready/return to HQ
15	Request Doctor at Location
16	Request Chief at Location
17	Request Police at scene
18	Request Fire Marshal (Routine Investigation)
19	Request Fire Marshal (Immediate Investigation)
20	Out of service at location
21	Request LIPA/Brooklyn Union at Location
22	Request Health Department at Location
23	Request LIRR power shut down
24	Tank empty ? request feeder lines from additional engines
25	Hydrant charged ? line charged
25C	In Line Pumping Completed/Lines Hooked up and charged
26	Apparatus DNR/No Driver
32	Fire Hydrant Damaged at Location
99	Apparatus Unable to Respond/Breakdow