Apparatus

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sensors Mode-S transponder

A183D3

ICAO 24-bit transponder address · allocated to United States

Currently assigned to N197SY · EMBRAER ERJ-170-200 (long wing) · operated by SKYWEST AIRLINES INC

Hex
A183D3
Octal
50301723
Decimal
10,585,043
Country
US
Tail
N197SY
Type
E75L
No current signal · last broadcast Jul 26, 22:45 UTC
Flights observed
682
Distinct callsigns
20
Country
US
Last broadcast
Jul 26, 22:45 UTC

Last known position

Most recent position reported by Mode-S A183D3.

Country allocation

The ICAO 24-bit address A183D3 falls within the block assigned to United States (US) by ICAO Annex 10, Volume III. Every aircraft registered in United States receives a permanent address from this block at the time of registration; the address stays with the airframe even if the aircraft is re-registered to a different operator within the country.

Callsign history 20 distinct

Callsign Airline Flights Last seen
SKW3074 - 9 2026-07-05
SKW3448 - 8 2026-06-22
SKW3346 - 8 2026-07-14
SKW3224 - 8 2026-06-30
SKW3404 SkyWest Airlines 7 2026-05-14
SKW3347 SkyWest Airlines 7 2026-07-19
SKW3122 - 7 2026-07-15
SKW3078 SkyWest Airlines 7 2026-06-23
SKW3073 - 7 2026-07-05
SKW3012 - 7 2026-07-16
SKW3285 SkyWest Airlines 6 2026-07-04
SKW3033 SkyWest Airlines 6 2026-05-20
SKW3019 SkyWest Airlines 6 2026-05-29
SKW3017 SkyWest Airlines 6 2026-07-21
SKW3499 - 5 2026-06-26
SKW3482 - 5 2026-07-16
SKW3445 SkyWest Airlines 5 2026-05-06
SKW3415 SkyWest Airlines 5 2026-06-08
SKW3408 SkyWest Airlines 5 2026-06-29
SKW3345 - 5 2026-07-22

Recent flights last 50

DateFlightRouteTakeoffLandingDuration
2026-07-26 SKW3097 MRY → PHX Jul 26, 22:35 UTCJul 26, 22:45 UTC10m
2026-07-26 SKW3300 PSP → SEA Jul 26, 20:50 UTCJul 26, 21:25 UTC35m
2026-07-26 SKW3300 PSP → SEA Jul 26, 19:05 UTCJul 26, 19:55 UTC50m
2026-07-25 SKW3374 STS → SNA Jul 25, 22:35 UTCJul 26, 00:00 UTC1h 25m
2026-07-25 SKW3475 SJC → AUS Jul 25, 18:45 UTCJul 25, 20:20 UTC1h 35m
2026-07-25 SKW3455 SJC → LAX Jul 25, 16:20 UTCJul 25, 17:35 UTC1h 15m
2026-07-25 SKW3067 LAX → SFO Jul 25, 06:10 UTCJul 25, 07:05 UTC55m
2026-07-25 SKW3072 SAN → SFO Jul 25, 02:30 UTCJul 25, 04:30 UTC2h 0m
2026-07-25 SKW3227 LAX → SFO Jul 25, 00:25 UTCJul 25, 01:30 UTC1h 5m
2026-07-24 SKW3269 SMF → LAX Jul 24, 22:30 UTCJul 24, 23:30 UTC1h 0m
2026-07-24 SKW3269 SMF → LAX Jul 24, 22:41 UTCJul 24, 23:24 UTC43m
2026-07-24 SKW3237 SFO → SNA Jul 24, 20:25 UTCJul 24, 21:35 UTC1h 10m
2026-07-24 SKW3025 DEN → SAN Jul 24, 17:45 UTCJul 24, 19:20 UTC1h 35m
2026-07-24 SKW3393 LAX → SFO Jul 24, 14:15 UTCJul 24, 15:45 UTC1h 30m
2026-07-24 SKW3037 BNA → ORD Jul 24, 07:05 UTCJul 24, 08:00 UTC55m
2026-07-24 SKW3226 HPN → ORD Jul 24, 03:50 UTCJul 24, 05:30 UTC1h 40m
2026-07-23 SKW3071 DTW → ORD Jul 23, 23:10 UTCJul 24, 00:40 UTC1h 30m
2026-07-23 SKW3349 PSP → SFO Jul 23, 19:10 UTCJul 23, 21:35 UTC2h 25m
2026-07-23 SKW3351 SAN → SJC Jul 23, 16:10 UTCJul 23, 18:15 UTC2h 5m
2026-07-23 SKW3050 SEA → EUG Jul 23, 13:50 UTCJul 23, 14:55 UTC1h 5m
2026-07-23 SKW3115 MCI → PHX Jul 23, 04:55 UTCJul 23, 06:10 UTC1h 15m
2026-07-23 SKW3030 SFO → BUR Jul 23, 02:10 UTCJul 23, 03:40 UTC1h 30m
2026-07-23 SKW3029 PSP → SEA Jul 23, 00:20 UTCJul 23, 01:20 UTC1h 0m
2026-07-22 SKW3484 SJC → PDX Jul 22, 18:25 UTCJul 22, 23:00 UTC4h 35m
2026-07-22 SKW3132 BOI → SFO Jul 22, 16:25 UTCJul 22, 17:00 UTC35m
2026-07-22 SKW3132 BOI → SFO Jul 22, 16:06 UTCJul 22, 16:50 UTC44m
2026-07-22 SKW3345 - Jul 22, 00:50 UTCJul 22, 01:50 UTC1h 0m
2026-07-22 SKW3345 ACV → SEA Jul 22, 00:54 UTCJul 22, 01:39 UTC45m
2026-07-21 SKW3220 LAX → EUG Jul 21, 22:40 UTCJul 21, 23:40 UTC1h 0m
2026-07-21 SKW3431 SJC → PSP Jul 21, 21:15 UTCJul 21, 21:40 UTC25m
2026-07-21 SKW3431 SJC → PSP Jul 21, 21:16 UTCJul 21, 21:38 UTC22m
2026-07-21 SKW3062 STS → PSP Jul 21, 19:51 UTCJul 21, 20:08 UTC17m
2026-07-21 SKW3062 STS → PSP Jul 21, 19:45 UTCJul 21, 20:15 UTC30m
2026-07-21 SKW3063 LAX → PDX Jul 21, 18:20 UTCJul 21, 18:50 UTC30m
2026-07-21 SKW3004 SJC → PHX Jul 21, 15:10 UTCJul 21, 16:50 UTC1h 40m
2026-07-21 SKW3017 HPN → ORD Jul 21, 02:25 UTCJul 21, 03:55 UTC1h 30m
2026-07-21 SKW812T FAT → SAN Jul 21, 00:05 UTCJul 21, 00:55 UTC50m
2026-07-20 SKW3389 SAN → SJC Jul 20, 22:05 UTCJul 20, 22:50 UTC45m
2026-07-20 SKW3479 SJC → BOI Jul 20, 19:50 UTCJul 20, 21:05 UTC1h 15m
2026-07-20 SKW3479 SJC → BOI Jul 20, 19:29 UTCJul 20, 20:54 UTC1h 25m
2026-07-20 SKW3342 LAX → SFO Jul 20, 17:10 UTCJul 20, 18:20 UTC1h 10m
2026-07-20 SKW3342 LAX → SFO Jul 20, 16:57 UTCJul 20, 18:15 UTC1h 18m
2026-07-20 SKW3244 SFO → SNA Jul 20, 13:50 UTCJul 20, 15:00 UTC1h 10m
2026-07-20 SKW3495 EUG → SEA Jul 20, 04:50 UTCJul 20, 05:55 UTC1h 5m
2026-07-20 SKW3492 SNA → SFO Jul 20, 01:35 UTCJul 20, 02:45 UTC1h 10m
2026-07-19 SKW3080 - Jul 19, 23:20 UTCJul 20, 00:25 UTC1h 5m
2026-07-19 SKW3080 PSP → SFO Jul 19, 23:10 UTCJul 20, 00:20 UTC1h 10m
2026-07-19 SKW3081 SFO → PSP Jul 19, 20:56 UTCJul 19, 22:05 UTC1h 9m
2026-07-19 SKW3347 SAN → SFO Jul 19, 18:45 UTCJul 19, 19:55 UTC1h 10m
2026-07-18 SKW3313 OAK → SAN Jul 18, 18:39 UTCJul 18, 19:45 UTC1h 6m

About Mode-S

A Mode-S transponder code (also called an "ICAO 24-bit address" or "hex code") is a 6-character hexadecimal identifier permanently assigned to an aircraft when it's first registered. Unlike callsigns (which change with each flight) or registrations (which can change if an aircraft is sold internationally), the Mode-S address stays with the airframe for the life of the aircraft in that country.

Every ADS-B transmission from an aircraft includes its Mode-S address, making it the most reliable way to identify a specific airframe. Flight-tracking services like Apparatus use the Mode-S address as the primary key for tying position broadcasts, callsigns, and ownership records together.

Prefer a tail-number view? See the N197SY page for operator, model, and routing details .

Mode-S A183D3 frequently asked

What is Mode-S code A183D3?
A183D3 is an ICAO 24-bit transponder address. Allocated to United States. Assigned to N197SY.
Where is Mode-S A183D3 registered?
Mode-S code A183D3 is allocated to United States (US). All aircraft registered there receive a Mode-S address from a fixed block defined by ICAO Annex 10.
Is A183D3 broadcasting right now?
No active broadcast right now. Last signal was Jul 26, 22:45 UTC.
Hex, octal, and decimal Mode-S codes: what's the difference?
The same 24-bit identifier expressed in different bases: hex A183D3, octal 50301723, decimal 10,585,043.
What flights does A183D3 operate?
Mode-S A183D3 has broadcast 20 distinct callsigns, including SKW3074, SKW3448, SKW3346, SKW3224, SKW3404.