Apparatus

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sensors Mode-S transponder

A163C2

ICAO 24-bit transponder address · allocated to United States

Currently assigned to N189SY · EMBRAER ERJ-170-200 (long wing) · operated by SKYWEST AIRLINES INC

Hex
A163C2
Octal
50261702
Decimal
10,576,834
Country
US
Tail
N189SY
Type
E75L
Broadcasting now · callsign SKW3220 · 33,000 ft
Flights observed
682
Distinct callsigns
20
Country
US
Last broadcast
Jul 26, 22:10 UTC

Current position

A163C2 is currently broadcasting. Map zoomed to live position.

Country allocation

The ICAO 24-bit address A163C2 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
SKW3329 SkyWest Airlines 10 2026-04-20
SKW3303 SkyWest Airlines 10 2026-06-09
SKW3054 SkyWest Airlines 10 2026-06-02
SKW3026 SkyWest Airlines 9 2026-07-22
SKW3304 SkyWest Airlines 8 2026-06-27
SKW3055 SkyWest Airlines 7 2026-07-19
SKW3342 - 6 2026-07-09
SKW3300 - 6 2026-07-13
SKW3286 SkyWest Airlines 6 2026-05-12
SKW3103 SkyWest Airlines 6 2026-05-12
SKW3100 SkyWest Airlines 6 2026-07-22
SKW3076 SkyWest Airlines 6 2026-05-30
SKW847E - 5 2026-07-06
SKW3360 SkyWest Airlines 5 2026-06-19
SKW3356 - 5 2026-07-11
SKW3295 SkyWest Airlines 5 2026-05-11
SKW3289 - 5 2026-07-01
SKW3288 SkyWest Airlines 5 2026-06-09
SKW3244 - 5 2026-07-09
SKW3208 SkyWest Airlines 5 2026-07-26

Recent flights last 50

DateFlightRouteTakeoffLandingDuration
2026-07-26 SKW3208 JAC → SFO Jul 26, 21:30 UTCJul 26, 22:10 UTC40m
2026-07-26 SKW3468 JAC → SFO Jul 26, 17:35 UTCJul 26, 18:55 UTC1h 20m
2026-07-26 SKW3251 SNA → SFO Jul 26, 15:10 UTCJul 26, 16:15 UTC1h 5m
2026-07-26 SKW3492 SNA → SFO Jul 26, 01:30 UTCJul 26, 02:35 UTC1h 5m
2026-07-25 SKW3080 YYZ → ORD Jul 25, 23:35 UTCJul 26, 00:35 UTC1h 0m
2026-07-25 SKW3081 SMF → SEA Jul 25, 20:50 UTCJul 25, 21:55 UTC1h 5m
2026-07-25 SKW3081 SMF → SEA Jul 25, 20:56 UTCJul 25, 21:50 UTC54m
2026-07-25 SKW3347 SAN → SFO Jul 25, 18:45 UTCJul 25, 19:44 UTC59m
2026-07-25 SKW3347 SAN → SFO Jul 25, 18:40 UTCJul 25, 19:50 UTC1h 10m
2026-07-25 SKW3235 BOI → SAN Jul 25, 14:55 UTCJul 25, 16:15 UTC1h 20m
2026-07-25 SKW3235 BOI → SAN Jul 25, 14:15 UTCJul 25, 14:25 UTC10m
2026-07-25 SKW3331 BOI → SAN Jul 25, 02:17 UTCJul 25, 03:44 UTC1h 27m
2026-07-25 SKW3331 BOI → SAN Jul 25, 02:05 UTCJul 25, 03:45 UTC1h 40m
2026-07-24 SKW3084 SBN → DFW Jul 24, 22:45 UTCJul 25, 01:10 UTC2h 25m
2026-07-24 SKW3085 IDA → SEA Jul 24, 18:25 UTCJul 24, 21:00 UTC2h 35m
2026-07-24 SKW3207 STS → BUR Jul 24, 15:15 UTCJul 24, 17:20 UTC2h 5m
2026-07-24 SKW3321 BOI → SEA Jul 24, 03:10 UTCJul 24, 04:30 UTC1h 20m
2026-07-24 SKW3466 SFO → PDX Jul 24, 00:50 UTCJul 24, 01:55 UTC1h 5m
2026-07-24 SKW3466 SFO → PDX Jul 24, 00:54 UTCJul 24, 01:53 UTC59m
2026-07-23 SKW3093 LAX → SFO Jul 23, 22:50 UTCJul 23, 23:50 UTC1h 0m
2026-07-23 SKW3223 RDM → BUR Jul 23, 18:50 UTCJul 23, 20:35 UTC1h 45m
2026-07-23 SKW3224 ORD → DTW Jul 23, 15:40 UTCJul 23, 17:15 UTC1h 35m
2026-07-23 SKW3260 EUG → BUR Jul 23, 06:05 UTCJul 23, 07:55 UTC1h 50m
2026-07-23 SKW3199 SAN → SMF Jul 23, 04:35 UTCJul 23, 05:20 UTC45m
2026-07-23 SKW3408 PDX → FAT Jul 23, 02:26 UTCJul 23, 02:54 UTC28m
2026-07-23 SKW3408 PDX → FAT Jul 23, 02:25 UTCJul 23, 03:00 UTC35m
2026-07-22 SKW3204 SEA → PDX Jul 22, 21:20 UTCJul 22, 21:55 UTC35m
2026-07-22 SKW3100 SBA → PHX Jul 22, 17:50 UTCJul 22, 18:50 UTC1h 0m
2026-07-22 SKW3100 SBA → PHX Jul 22, 17:41 UTCJul 22, 18:44 UTC1h 3m
2026-07-22 SKW3101 FWA → DFW Jul 22, 15:30 UTCJul 22, 16:15 UTC45m
2026-07-22 SKW3026 SEA → IDA Jul 22, 13:15 UTCJul 22, 13:55 UTC40m
2026-07-22 SKW3027 SEA → FAT Jul 22, 03:00 UTCJul 22, 03:45 UTC45m
2026-07-22 SKW3306 OAK → PDX Jul 22, 01:00 UTCJul 22, 01:50 UTC50m
2026-07-21 SKW3305 LAX → SFO Jul 21, 23:05 UTCJul 21, 23:45 UTC40m
2026-07-21 SKW3305 LAX → SFO Jul 21, 23:14 UTCJul 21, 23:40 UTC26m
2026-07-21 SKW3294 GEG → SEA Jul 21, 21:30 UTCJul 21, 22:05 UTC35m
2026-07-21 SKW3294 GEG → SEA Jul 21, 21:21 UTCJul 21, 21:59 UTC38m
2026-07-21 SKW3294 GEG → SEA Jul 21, 19:55 UTCJul 21, 20:20 UTC25m
2026-07-21 SKW3100 SBA → PHX Jul 21, 17:50 UTCJul 21, 18:50 UTC1h 0m
2026-07-21 SKW3101 FWA → DFW Jul 21, 15:35 UTCJul 21, 16:25 UTC50m
2026-07-21 SKW3385 - Jul 21, 13:25 UTCJul 21, 13:55 UTC30m
2026-07-21 SKW3102 LAX → SFO Jul 21, 05:50 UTCJul 21, 06:15 UTC25m
2026-07-21 SKW3048 PDX → SEA Jul 21, 02:35 UTCJul 21, 03:15 UTC40m
2026-07-20 SKW3107 SJC → SAN Jul 20, 23:55 UTCJul 21, 01:30 UTC1h 35m
2026-07-20 SKW3092 SAN → SJC Jul 20, 22:10 UTCJul 20, 23:10 UTC1h 0m
2026-07-20 SKW3467 FCA → LAX Jul 20, 19:55 UTCJul 20, 21:10 UTC1h 15m
2026-07-20 SKW3450 SNA → SFO Jul 20, 16:55 UTCJul 20, 17:55 UTC1h 0m
2026-07-20 SKW3497 LAX → PDX Jul 20, 14:50 UTCJul 20, 15:40 UTC50m
2026-07-20 SKW3022 ORD → BNA Jul 20, 00:45 UTCJul 20, 02:45 UTC2h 0m
2026-07-19 SKW3041 STS → BUR Jul 19, 23:05 UTCJul 19, 23:30 UTC25m

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 N189SY page for operator, model, and routing details .

Mode-S A163C2 frequently asked

What is Mode-S code A163C2?
A163C2 is an ICAO 24-bit transponder address. Allocated to United States. Assigned to N189SY.
Where is Mode-S A163C2 registered?
Mode-S code A163C2 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 A163C2 broadcasting right now?
Yes. Mode-S A163C2 is currently airborne.
Hex, octal, and decimal Mode-S codes: what's the difference?
The same 24-bit identifier expressed in different bases: hex A163C2, octal 50261702, decimal 10,576,834.
What flights does A163C2 operate?
Mode-S A163C2 has broadcast 20 distinct callsigns, including SKW3329, SKW3303, SKW3054, SKW3026, SKW3304.