Apparatus

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sensors Mode-S transponder

A1388C

ICAO 24-bit transponder address · allocated to United States

Currently assigned to N178SY · EMBRAER ERJ-170-200 (long wing) · operated by SKYWEST AIRLINES INC

Hex
A1388C
Octal
50234214
Decimal
10,565,772
Country
US
Tail
N178SY
Type
E75L
No current signal · last broadcast Jul 26, 21:15 UTC
Flights observed
678
Distinct callsigns
20
Country
US
Last broadcast
Jul 26, 21:15 UTC

Last known position

Most recent position reported by Mode-S A1388C.

Country allocation

The ICAO 24-bit address A1388C 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
SKW3294 SkyWest Airlines 10 2026-07-03
SKW3353 SkyWest Airlines 8 2026-07-18
SKW3450 - 7 2026-07-07
SKW3400 - 7 2026-06-26
SKW3050 SkyWest Airlines 7 2026-07-25
SKW3306 - 6 2026-07-04
SKW3066 SkyWest Airlines 6 2026-06-14
SKW3492 SkyWest Airlines 5 2026-06-11
SKW3482 SkyWest Airlines 5 2026-05-27
SKW3440 SkyWest Airlines 5 2026-04-21
SKW3393 SkyWest Airlines 5 2026-07-26
SKW3389 - 5 2026-07-14
SKW3360 - 5 2026-07-15
SKW3305 - 5 2026-07-03
SKW3304 SkyWest Airlines 5 2026-07-02
SKW3303 - 5 2026-07-18
SKW3298 - 5 2026-06-20
SKW3284 SkyWest Airlines 5 2026-07-04
SKW3224 - 5 2026-07-01
SKW3214 - 5 2026-07-04

Recent flights last 50

DateFlightRouteTakeoffLandingDuration
2026-07-26 SKW3237 SFO → SNA Jul 26, 20:05 UTCJul 26, 21:15 UTC1h 10m
2026-07-26 SKW3025 DEN → SAN Jul 26, 17:25 UTCJul 26, 18:55 UTC1h 30m
2026-07-26 SKW3393 LAX → SFO Jul 26, 14:10 UTCJul 26, 15:45 UTC1h 35m
2026-07-26 SKW3037 BNA → ORD Jul 26, 06:25 UTCJul 26, 07:20 UTC56m
2026-07-26 SKW3037 BNA → ORD Jul 26, 06:15 UTCJul 26, 07:18 UTC1h 3m
2026-07-26 SKW3226 HPN → ORD Jul 26, 03:40 UTCJul 26, 05:10 UTC1h 30m
2026-07-26 SKW3226 HPN → ORD Jul 26, 03:40 UTCJul 26, 04:52 UTC1h 12m
2026-07-25 SKW3071 DTW → ORD Jul 25, 23:45 UTCJul 26, 01:20 UTC1h 35m
2026-07-25 SKW3369 PSP → SFO Jul 25, 21:45 UTCJul 25, 22:35 UTC50m
2026-07-25 SKW3369 PSP → SFO Jul 25, 17:00 UTCJul 25, 17:40 UTC40m
2026-07-25 SKW3369 PSP → SFO Jul 25, 16:59 UTCJul 25, 18:30 UTC1h 31m
2026-07-25 SKW3050 SEA → EUG Jul 25, 13:15 UTCJul 25, 14:20 UTC1h 5m
2026-07-25 SKW3050 SEA → EUG Jul 25, 13:18 UTCJul 25, 14:10 UTC52m
2026-07-25 SKW3302 SNA → SFO Jul 25, 05:55 UTCJul 25, 07:05 UTC1h 10m
2026-07-25 SKW3429 SAN → SJC Jul 25, 00:35 UTCJul 25, 01:40 UTC1h 5m
2026-07-24 SKW918J SAN → SJC Jul 24, 21:55 UTCJul 24, 22:50 UTC55m
2026-07-24 SKW3426 LAX → SJC Jul 24, 19:30 UTCJul 24, 20:45 UTC1h 15m
2026-07-24 SKW3463 LAX → SJC Jul 24, 16:35 UTCJul 24, 17:40 UTC1h 5m
2026-07-24 SKW3402 SFO → LAX Jul 24, 13:25 UTCJul 24, 14:20 UTC55m
2026-07-24 SKW3024 BNA → ORD Jul 24, 02:30 UTCJul 24, 04:00 UTC1h 30m
2026-07-24 SKW3098 STS → SNA Jul 24, 00:40 UTCJul 24, 01:40 UTC1h 0m
2026-07-23 SKW3097 MRY → PHX Jul 23, 21:45 UTCJul 23, 22:30 UTC45m
2026-07-23 SKW3074 LAX → SFO Jul 23, 20:10 UTCJul 23, 20:45 UTC35m
2026-07-23 SKW3073 SAN → EUG Jul 23, 17:55 UTCJul 23, 18:30 UTC35m
2026-07-23 SKW3004 SJC → PHX Jul 23, 14:40 UTCJul 23, 16:05 UTC1h 25m
2026-07-23 SKW3291 DFW → ASE Jul 23, 01:00 UTCJul 23, 02:30 UTC1h 30m
2026-07-22 SKW3475 SJC → AUS Jul 22, 18:50 UTCJul 22, 23:45 UTC4h 55m
2026-07-22 SKW3409 SAN → STS Jul 22, 16:25 UTCJul 22, 17:20 UTC55m
2026-07-21 SKW3285 LAX → SEA Jul 21, 23:15 UTCJul 22, 00:40 UTC1h 25m
2026-07-21 SKW9795 STS → SFO Jul 21, 20:55 UTCJul 21, 22:15 UTC1h 20m
2026-07-21 SKW3133 LAX → SEA Jul 21, 01:35 UTCJul 21, 02:20 UTC45m
2026-07-20 SKW3056 EUG → SAN Jul 20, 22:00 UTCJul 21, 00:15 UTC2h 14m
2026-07-20 SKW3038 DFW → ACT Jul 20, 19:10 UTCJul 20, 21:00 UTC1h 50m
2026-07-20 SKW3499 SJC → SAN Jul 20, 16:20 UTCJul 20, 17:35 UTC1h 15m
2026-07-20 SKW3131 - Jul 20, 13:50 UTCJul 20, 15:20 UTC1h 30m
2026-07-20 SKW3096 EUG → SEA Jul 20, 01:30 UTCJul 20, 01:45 UTC15m
2026-07-20 SKW3096 EUG → SEA Jul 20, 00:00 UTCJul 20, 00:45 UTC45m
2026-07-19 SKW3095 ACT → DFW Jul 19, 21:00 UTCJul 19, 22:50 UTC1h 50m
2026-07-19 SKW3209 - Jul 19, 18:25 UTCJul 19, 19:50 UTC1h 25m
2026-07-19 SKW3116 - Jul 19, 15:15 UTCJul 19, 16:55 UTC1h 40m
2026-07-19 SKW3215 GEG → BOI Jul 19, 03:49 UTCJul 19, 04:18 UTC29m
2026-07-19 SKW3215 - Jul 19, 03:30 UTCJul 19, 04:20 UTC50m
2026-07-19 SKW3052 SFO → LAX Jul 19, 01:55 UTCJul 19, 02:40 UTC45m
2026-07-18 SKW3490 STS → SNA Jul 18, 20:00 UTCJul 19, 01:00 UTC5h 0m
2026-07-18 SKW3089 RNO → SEA Jul 18, 16:45 UTCJul 18, 18:15 UTC1h 30m
2026-07-18 SKW3353 RDM → SFO Jul 18, 14:25 UTCJul 18, 15:30 UTC1h 5m
2026-07-18 SKW3109 - Jul 18, 12:50 UTCJul 18, 13:25 UTC35m
2026-07-18 SKW3303 - Jul 18, 03:50 UTCJul 18, 05:30 UTC1h 40m
2026-07-17 SKW3438 SJC → PDX Jul 17, 21:25 UTCJul 18, 02:00 UTC4h 35m
2026-07-17 SKW3324 - Jul 17, 15:40 UTCJul 17, 17:35 UTC1h 55m

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 N178SY page for operator, model, and routing details .

Mode-S A1388C frequently asked

What is Mode-S code A1388C?
A1388C is an ICAO 24-bit transponder address. Allocated to United States. Assigned to N178SY.
Where is Mode-S A1388C registered?
Mode-S code A1388C 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 A1388C broadcasting right now?
No active broadcast right now. Last signal was Jul 26, 21:15 UTC.
Hex, octal, and decimal Mode-S codes: what's the difference?
The same 24-bit identifier expressed in different bases: hex A1388C, octal 50234214, decimal 10,565,772.
What flights does A1388C operate?
Mode-S A1388C has broadcast 20 distinct callsigns, including SKW3294, SKW3353, SKW3450, SKW3400, SKW3050.