Apparatus

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sensors Mode-S transponder

A13C43

ICAO 24-bit transponder address · allocated to United States

Currently assigned to N179SY · EMBRAER ERJ-170-200 (long wing) · operated by SKYWEST AIRLINES INC

Hex
A13C43
Octal
50236103
Decimal
10,566,723
Country
US
Tail
N179SY
Type
E75L
No current signal · last broadcast Jul 26, 20:30 UTC
Flights observed
682
Distinct callsigns
20
Country
US
Last broadcast
Jul 26, 20:30 UTC

Last known position

Most recent position reported by Mode-S A13C43.

Country allocation

The ICAO 24-bit address A13C43 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
SKW3440 SkyWest Airlines 9 2026-06-04
SKW3027 - 8 2026-07-09
SKW3433 - 7 2026-06-24
SKW3223 - 7 2026-07-04
SKW3101 SkyWest Airlines 7 2026-07-08
SKW3492 - 6 2026-07-12
SKW3439 SkyWest Airlines 6 2026-07-24
SKW3360 - 6 2026-07-02
SKW3260 - 6 2026-07-04
SKW3259 SkyWest Airlines 6 2026-05-21
SKW3220 - 6 2026-07-03
SKW3050 - 6 2026-06-26
SKW849R - 5 2026-07-01
SKW847E SkyWest Airlines 5 2026-07-26
SKW3432 - 5 2026-07-14
SKW3345 SkyWest Airlines 5 2026-07-03
SKW3304 - 5 2026-07-10
SKW3291 - 5 2026-07-07
SKW3224 - 5 2026-07-04
SKW3122 SkyWest Airlines 5 2026-07-23

Recent flights last 50

DateFlightRouteTakeoffLandingDuration
2026-07-26 SKW3475 SJC → AUS Jul 26, 18:50 UTCJul 26, 20:30 UTC1h 40m
2026-07-26 SKW3409 SAN → STS Jul 26, 16:30 UTCJul 26, 17:25 UTC55m
2026-07-26 SKW3409 SAN → STS Jul 26, 16:04 UTCJul 26, 17:20 UTC1h 16m
2026-07-26 SKW847E SAN → FAT Jul 26, 05:25 UTCJul 26, 06:05 UTC40m
2026-07-26 SKW847E SAN → FAT Jul 26, 05:22 UTCJul 26, 06:10 UTC48m
2026-07-26 SKW3060 PHX → SAN Jul 26, 02:20 UTCJul 26, 03:15 UTC55m
2026-07-26 SKW3060 PHX → SAN Jul 26, 02:14 UTCJul 26, 03:11 UTC57m
2026-07-26 SKW3061 LAX → SJC Jul 26, 00:00 UTCJul 26, 00:55 UTC55m
2026-07-25 SKW3084 SBN → DFW Jul 25, 20:10 UTCJul 25, 22:40 UTC2h 30m
2026-07-25 SKW3085 IDA → SEA Jul 25, 16:30 UTCJul 25, 19:05 UTC2h 35m
2026-07-25 SKW3207 STS → BUR Jul 25, 13:25 UTCJul 25, 15:15 UTC1h 50m
2026-07-25 SKW3206 SAN → PDX Jul 25, 03:55 UTCJul 25, 05:25 UTC1h 30m
2026-07-25 SKW3036 LAX → SFO Jul 25, 01:35 UTCJul 25, 02:50 UTC1h 15m
2026-07-24 SKW3035 GEG → SEA Jul 24, 23:15 UTCJul 25, 00:30 UTC1h 15m
2026-07-24 SKW3439 STS → SAN Jul 24, 20:50 UTCJul 24, 22:10 UTC1h 20m
2026-07-24 SKW833K SAN → SMF Jul 24, 18:50 UTCJul 24, 20:00 UTC1h 10m
2026-07-24 SKW3015 SJC → LAX Jul 24, 16:30 UTCJul 24, 17:45 UTC1h 15m
2026-07-24 SKW3006 SEA → SFO Jul 24, 03:10 UTCJul 24, 04:20 UTC1h 10m
2026-07-24 SKW3211 LEX → ORD Jul 24, 00:35 UTCJul 24, 01:45 UTC1h 10m
2026-07-23 SKW3210 ORD → LEX Jul 23, 21:35 UTCJul 23, 23:20 UTC1h 45m
2026-07-23 SKW3117 SAN → SLC Jul 23, 19:05 UTCJul 23, 20:45 UTC1h 40m
2026-07-23 SKW3122 PHX → STS Jul 23, 16:30 UTCJul 23, 18:05 UTC1h 35m
2026-07-23 SKW3315 LAX → SEA Jul 23, 13:35 UTCJul 23, 14:55 UTC1h 20m
2026-07-23 SKW3302 SNA → SFO Jul 23, 04:25 UTCJul 23, 05:35 UTC1h 10m
2026-07-23 SKW3060 PHX → SAN Jul 23, 02:30 UTCJul 23, 03:25 UTC55m
2026-07-23 SKW3061 LAX → SJC Jul 23, 00:10 UTCJul 23, 01:05 UTC55m
2026-07-22 SKW3084 SBN → DFW Jul 22, 20:25 UTCJul 22, 22:50 UTC2h 25m
2026-07-22 SKW3085 IDA → SEA Jul 22, 16:29 UTCJul 22, 18:58 UTC2h 29m
2026-07-22 SKW3085 IDA → SEA Jul 22, 16:25 UTCJul 22, 19:00 UTC2h 35m
2026-07-22 SKW3207 STS → BUR Jul 22, 13:20 UTCJul 22, 15:10 UTC1h 50m
2026-07-22 SKW3321 BOI → SEA Jul 22, 03:05 UTCJul 22, 04:30 UTC1h 25m
2026-07-21 SKW3398 PDX → SBP Jul 21, 18:45 UTCJul 22, 00:45 UTC6h 0m
2026-07-21 SKW3324 SNA → SFO Jul 21, 15:35 UTCJul 21, 17:10 UTC1h 35m
2026-07-21 SKW3324 SNA → SFO Jul 21, 15:25 UTCJul 21, 17:15 UTC1h 50m
2026-07-21 SKW3319 SFO → SNA Jul 21, 02:40 UTCJul 21, 04:30 UTC1h 50m
2026-07-21 SKW3337 - Jul 21, 00:35 UTCJul 21, 01:45 UTC1h 10m
2026-07-20 SKW3064 COS → DFW Jul 20, 21:40 UTCJul 20, 23:20 UTC1h 40m
2026-07-20 SKW3365 - Jul 20, 18:35 UTCJul 20, 20:15 UTC1h 40m
2026-07-20 SKW3480 BZN → SAN Jul 20, 14:23 UTCJul 20, 15:59 UTC1h 36m
2026-07-20 SKW3480 BZN → SAN Jul 20, 14:05 UTCJul 20, 16:00 UTC1h 55m
2026-07-20 SKW3413 - Jul 20, 02:55 UTCJul 20, 04:05 UTC1h 10m
2026-07-20 SKW3068 SAN → PHX Jul 20, 00:55 UTCJul 20, 01:55 UTC1h 0m
2026-07-19 SKW3311 SJC → LAX Jul 19, 22:05 UTCJul 19, 23:20 UTC1h 15m
2026-07-19 SKW3218 SAN → OAK Jul 19, 19:45 UTCJul 19, 20:50 UTC1h 5m
2026-07-19 SKW3059 SJC → LAX Jul 19, 17:20 UTCJul 19, 18:30 UTC1h 10m
2026-07-19 SKW864W SAN → SJC Jul 19, 15:10 UTCJul 19, 16:10 UTC1h 0m
2026-07-19 SKW3293 AUS → SAN Jul 19, 11:20 UTCJul 19, 13:50 UTC2h 30m
2026-07-19 SKW3293 AUS → SAN Jul 19, 11:20 UTCJul 19, 13:45 UTC2h 25m
2026-07-19 SKW3292 SAN → AUS Jul 19, 01:15 UTCJul 19, 03:50 UTC2h 35m
2026-07-18 SKW3056 EUG → SAN Jul 18, 21:45 UTCJul 19, 00:10 UTC2h 25m

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 N179SY page for operator, model, and routing details .

Mode-S A13C43 frequently asked

What is Mode-S code A13C43?
A13C43 is an ICAO 24-bit transponder address. Allocated to United States. Assigned to N179SY.
Where is Mode-S A13C43 registered?
Mode-S code A13C43 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 A13C43 broadcasting right now?
No active broadcast right now. Last signal was Jul 26, 20:30 UTC.
Hex, octal, and decimal Mode-S codes: what's the difference?
The same 24-bit identifier expressed in different bases: hex A13C43, octal 50236103, decimal 10,566,723.
What flights does A13C43 operate?
Mode-S A13C43 has broadcast 20 distinct callsigns, including SKW3440, SKW3027, SKW3433, SKW3223, SKW3101.