Apparatus

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sensors Mode-S transponder

A280A4

ICAO 24-bit transponder address · allocated to United States

Currently assigned to N260SY · EMBRAER ERJ-170-200 (long wing) · operated by SKYWEST AIRLINES INC

Hex
A280A4
Octal
50500244
Decimal
10,649,764
Country
US
Tail
N260SY
Type
E75L
No current signal · last broadcast Jul 26, 23:00 UTC
Flights observed
693
Distinct callsigns
20
Country
US
Last broadcast
Jul 26, 23:00 UTC

Last known position

Most recent position reported by Mode-S A280A4.

Country allocation

The ICAO 24-bit address A280A4 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
SKW3989 SkyWest Airlines 14 2026-07-22
SKW4101 - 12 2026-07-11
SKW3935 SkyWest Airlines 11 2026-07-22
SKW4028 SkyWest Airlines 8 2026-07-26
SKW3951 SkyWest Airlines 8 2026-04-23
SKW3660 SkyWest Airlines 8 2026-07-22
SKW3650 SkyWest Airlines 8 2026-07-25
SKW135K SkyWest Airlines 8 2026-07-22
SKW4005 - 7 2026-07-19
SKW3952 SkyWest Airlines 7 2026-07-26
SKW3773 SkyWest Airlines 7 2026-05-02
SKW3765 SkyWest Airlines 7 2026-06-13
SKW4444 SkyWest Airlines 6 2026-06-18
SKW4141 - 6 2026-06-24
SKW4063 SkyWest Airlines 6 2026-07-23
SKW3907 - 6 2026-07-08
SKW3767 - 6 2026-07-09
SKW3750 - 6 2026-06-20
SKW3734 SkyWest Airlines 6 2026-07-25
SKW3701 - 6 2026-06-20

Recent flights last 50

DateFlightRouteTakeoffLandingDuration
2026-07-26 SKW3669 DTW → YUL Jul 26, 22:20 UTCJul 26, 23:00 UTC40m
2026-07-26 SKW4028 SEA → SFO Jul 26, 18:00 UTCJul 26, 20:20 UTC2h 20m
2026-07-26 SKW4028 SEA → SFO Jul 26, 14:35 UTCJul 26, 17:00 UTC2h 25m
2026-07-26 SKW4088 JFK → BOS Jul 26, 11:55 UTCJul 26, 13:15 UTC1h 20m
2026-07-26 SKW4088 JFK → BOS Jul 26, 11:57 UTCJul 26, 13:10 UTC1h 13m
2026-07-26 SKW3952 ATL → HPN Jul 26, 01:20 UTCJul 26, 02:50 UTC1h 30m
2026-07-26 SKW3952 ATL → HPN Jul 26, 01:10 UTCJul 26, 02:50 UTC1h 40m
2026-07-25 SKW3612 OMA → DTW Jul 25, 21:40 UTCJul 25, 23:50 UTC2h 10m
2026-07-25 SKW3612 OMA → DTW Jul 25, 18:15 UTCJul 25, 20:20 UTC2h 5m
2026-07-25 SKW3650 FAR → MSP Jul 25, 15:20 UTCJul 25, 16:40 UTC1h 20m
2026-07-25 SKW3650 FAR → MSP Jul 25, 12:30 UTCJul 25, 14:20 UTC1h 50m
2026-07-25 SKW3734 LGA → OKC Jul 25, 01:00 UTCJul 25, 03:00 UTC2h 0m
2026-07-24 SKW3734 LGA → OKC Jul 24, 23:58 UTCJul 25, 02:59 UTC3h 1m
2026-07-24 SKW3734 LGA → OKC Jul 24, 20:20 UTCJul 24, 22:40 UTC2h 20m
2026-07-24 SKW4121 MDW → DTW Jul 24, 17:55 UTCJul 24, 18:55 UTC1h 0m
2026-07-24 SKW4177 AUS → MFE Jul 24, 16:00 UTCJul 24, 16:50 UTC50m
2026-07-24 SKW3950 JFK → IAD Jul 24, 12:44 UTCJul 24, 15:09 UTC2h 25m
2026-07-24 SKW3950 JFK → IAD Jul 24, 12:45 UTCJul 24, 15:10 UTC2h 25m
2026-07-24 SKW3914 SEA → SMF Jul 24, 10:49 UTCJul 24, 11:35 UTC46m
2026-07-24 SKW3834 GTF → MSP Jul 24, 03:00 UTCJul 24, 03:55 UTC55m
2026-07-23 SKW4063 SLC → OAK Jul 23, 23:50 UTCJul 24, 01:25 UTC1h 35m
2026-07-23 SKW4063 SLC → OAK Jul 23, 21:10 UTCJul 23, 22:40 UTC1h 30m
2026-07-23 SKW157E YWG → MSP Jul 23, 17:50 UTCJul 23, 18:45 UTC55m
2026-07-23 SKW157E YWG → MSP Jul 23, 17:58 UTCJul 23, 18:41 UTC43m
2026-07-23 SKW197F MSP → YWG Jul 23, 15:46 UTCJul 23, 16:37 UTC51m
2026-07-23 SKW197F MSP → YWG Jul 23, 15:30 UTCJul 23, 16:40 UTC1h 10m
2026-07-23 SKW4458 - Jul 23, 13:10 UTCJul 23, 14:10 UTC1h 0m
2026-07-23 SKW4468 GSO → DTW Jul 23, 01:40 UTCJul 23, 02:25 UTC45m
2026-07-22 SKW3935 LAX → SJC Jul 22, 23:00 UTCJul 22, 23:40 UTC40m
2026-07-22 SKW3935 LAX → SJC Jul 22, 20:35 UTCJul 22, 21:25 UTC50m
2026-07-22 SKW3989 PHX → LAX Jul 22, 17:20 UTCJul 22, 19:05 UTC1h 45m
2026-07-22 SKW3989 PHX → LAX Jul 22, 17:21 UTCJul 22, 19:04 UTC1h 43m
2026-07-22 SKW3989 PHX → LAX Jul 22, 14:35 UTCJul 22, 16:05 UTC1h 30m
2026-07-22 SKW3660 MSP → YYZ Jul 22, 11:45 UTCJul 22, 12:45 UTC1h 0m
2026-07-22 SKW135K LAX → SJC Jul 22, 03:25 UTCJul 22, 04:30 UTC1h 5m
2026-07-22 SKW4462 MSP → MKE Jul 22, 01:00 UTCJul 22, 01:55 UTC55m
2026-07-21 SKW4462 MSP → MKE Jul 21, 23:20 UTCJul 22, 00:10 UTC50m
2026-07-21 SKW4032 HPN → ATL Jul 21, 21:35 UTCJul 21, 22:20 UTC45m
2026-07-21 SKW4032 HPN → ATL Jul 21, 20:00 UTCJul 21, 20:45 UTC45m
2026-07-21 SKW157E YWG → MSP Jul 21, 17:50 UTCJul 21, 18:55 UTC1h 5m
2026-07-21 SKW197F MSP → YWG Jul 21, 15:30 UTCJul 21, 16:45 UTC1h 15m
2026-07-21 SKW4458 - Jul 21, 13:10 UTCJul 21, 14:05 UTC55m
2026-07-21 SKW4468 MSP → MKE Jul 21, 01:50 UTCJul 21, 02:14 UTC24m
2026-07-21 SKW4468 MSP → MKE Jul 21, 01:35 UTCJul 21, 02:25 UTC50m
2026-07-20 SKW3935 LAX → SJC Jul 20, 23:05 UTCJul 20, 23:50 UTC45m
2026-07-20 SKW3935 LAX → SJC Jul 20, 22:58 UTCJul 20, 23:39 UTC41m
2026-07-20 SKW3935 LAX → SJC Jul 20, 20:45 UTCJul 20, 21:40 UTC55m
2026-07-20 SKW3989 - Jul 20, 17:25 UTCJul 20, 19:40 UTC2h 15m
2026-07-20 SKW3989 MEM → MSP Jul 20, 17:24 UTCJul 20, 19:38 UTC2h 14m
2026-07-20 SKW3989 - Jul 20, 14:40 UTCJul 20, 16:25 UTC1h 45m

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 N260SY page for operator, model, and routing details .

Mode-S A280A4 frequently asked

What is Mode-S code A280A4?
A280A4 is an ICAO 24-bit transponder address. Allocated to United States. Assigned to N260SY.
Where is Mode-S A280A4 registered?
Mode-S code A280A4 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 A280A4 broadcasting right now?
No active broadcast right now. Last signal was Jul 26, 23:00 UTC.
Hex, octal, and decimal Mode-S codes: what's the difference?
The same 24-bit identifier expressed in different bases: hex A280A4, octal 50500244, decimal 10,649,764.
What flights does A280A4 operate?
Mode-S A280A4 has broadcast 20 distinct callsigns, including SKW3989, SKW4101, SKW3935, SKW4028, SKW3951.