Apparatus

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sensors Mode-S transponder

A2F111

ICAO 24-bit transponder address · allocated to United States

Currently assigned to N289SY · EMBRAER ERJ-170-200 (long wing) · operated by SKYWEST AIRLINES INC

Hex
A2F111
Octal
50570421
Decimal
10,678,545
Country
US
Tail
N289SY
Type
E75L
Broadcasting now · callsign SKW3788 · 12,025 ft
Flights observed
641
Distinct callsigns
20
Country
US
Last broadcast
8m ago

Current position

A2F111 is currently broadcasting. Map zoomed to live position.

Country allocation

The ICAO 24-bit address A2F111 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
SKW4454 SkyWest Airlines 13 2026-05-21
SKW4179 - 13 2026-07-01
SKW4108 SkyWest Airlines 13 2026-06-30
SKW4078 SkyWest Airlines 13 2026-07-01
SKW3786 SkyWest Airlines 12 2026-07-03
SKW4138 - 10 2026-07-09
SKW4052 SkyWest Airlines 10 2026-05-02
SKW3944 - 10 2026-07-12
SKW3853 - 10 2026-07-06
SKW3852 - 10 2026-06-18
SKW4449 - 9 2026-07-11
SKW4149 - 9 2026-07-02
SKW4141 SkyWest Airlines 9 2026-06-13
SKW4048 SkyWest Airlines 9 2026-05-21
SKW4030 - 9 2026-07-12
SKW120W - 9 2026-07-12
SKW4126 - 8 2026-07-02
SKW4070 SkyWest Airlines 8 2026-04-22
SKW3891 SkyWest Airlines 8 2026-06-10
SKW3718 - 8 2026-07-04

Recent flights last 50

DateFlightRouteTakeoffLandingDuration
2026-07-14 SKW3788 - Jul 14, 03:20 UTCJul 14, 04:15 UTC55m
2026-07-14 SKW3693 BUR → SLC Jul 14, 00:15 UTCJul 14, 01:35 UTC1h 20m
2026-07-13 SKW3693 SLC → BUR Jul 13, 21:30 UTCJul 13, 23:00 UTC1h 30m
2026-07-13 SKW129H YYC → SLC Jul 13, 18:35 UTCJul 13, 20:25 UTC1h 50m
2026-07-13 SKW104T - Jul 13, 15:45 UTCJul 13, 16:15 UTC30m
2026-07-13 SKW104T SLC → YYC Jul 13, 15:47 UTCJul 13, 17:10 UTC1h 23m
2026-07-13 SKW4022 - Jul 13, 14:20 UTCJul 13, 14:50 UTC30m
2026-07-13 SKW4022 JAC → SLC Jul 13, 14:04 UTCJul 13, 14:45 UTC41m
2026-07-13 SKW4025 - Jul 13, 00:50 UTCJul 13, 01:10 UTC20m
2026-07-12 SKW4134 OAK → SLC Jul 12, 21:35 UTCJul 12, 23:00 UTC1h 25m
2026-07-12 SKW4134 SLC → OAK Jul 12, 19:13 UTCJul 12, 20:32 UTC1h 19m
2026-07-12 SKW4134 - Jul 12, 19:10 UTCJul 12, 20:15 UTC1h 5m
2026-07-12 SKW3944 - Jul 12, 17:40 UTCJul 12, 18:15 UTC35m
2026-07-12 SKW3944 - Jul 12, 15:55 UTCJul 12, 16:25 UTC30m
2026-07-12 SKW4030 - Jul 12, 13:15 UTCJul 12, 14:25 UTC1h 10m
2026-07-12 SKW120W - Jul 12, 02:45 UTCJul 12, 03:55 UTC1h 10m
2026-07-12 SKW120W SLC → PSP Jul 12, 02:54 UTCJul 12, 04:01 UTC1h 7m
2026-07-11 SKW3800 SLC → SLC Jul 11, 22:20 UTCJul 12, 01:45 UTC3h 25m
2026-07-11 SKW3859 SLC → SLC Jul 11, 17:20 UTCJul 11, 20:50 UTC3h 30m
2026-07-11 SKW174P YYC → SLC Jul 11, 14:10 UTCJul 11, 15:55 UTC1h 45m
2026-07-11 SKW154F SLC → YYC Jul 11, 03:05 UTCJul 11, 04:45 UTC1h 40m
2026-07-11 SKW4449 COS → SLC Jul 11, 00:35 UTCJul 11, 01:50 UTC1h 15m
2026-07-10 SKW4449 SLC → COS Jul 10, 22:10 UTCJul 10, 23:15 UTC1h 5m
2026-07-10 SKW3859 SLC → SLC Jul 10, 17:40 UTCJul 10, 20:55 UTC3h 15m
2026-07-10 SKW117W COS → SLC Jul 10, 15:25 UTCJul 10, 16:45 UTC1h 20m
2026-07-10 SKW3788 SLC → COS Jul 10, 03:15 UTCJul 10, 04:30 UTC1h 15m
2026-07-09 SKW4105 EUG → SLC Jul 9, 23:50 UTCJul 10, 01:15 UTC1h 25m
2026-07-09 SKW4105 SLC → EUG Jul 9, 21:10 UTCJul 9, 22:40 UTC1h 30m
2026-07-09 SKW4019 - Jul 9, 19:25 UTCJul 9, 20:00 UTC35m
2026-07-09 SKW172E - Jul 9, 17:35 UTCJul 9, 18:00 UTC25m
2026-07-09 SKW4138 - Jul 9, 13:15 UTCJul 9, 14:25 UTC1h 10m
2026-07-09 SKW3774 - Jul 9, 02:55 UTCJul 9, 04:00 UTC1h 5m
2026-07-09 SKW3693 HPN → ATL Jul 9, 00:10 UTCJul 9, 01:30 UTC1h 20m
2026-07-08 SKW3693 HPN → ATL Jul 8, 21:30 UTCJul 8, 23:05 UTC1h 35m
2026-07-08 SKW3944 - Jul 8, 17:45 UTCJul 8, 18:15 UTC30m
2026-07-08 SKW3944 IDA → SLC Jul 8, 17:45 UTCJul 8, 18:10 UTC25m
2026-07-08 SKW3944 - Jul 8, 15:55 UTCJul 8, 16:20 UTC25m
2026-07-08 SKW4030 - Jul 8, 13:10 UTCJul 8, 14:25 UTC1h 15m
2026-07-08 SKW120W SLC → PSP Jul 8, 02:58 UTCJul 8, 04:11 UTC1h 13m
2026-07-08 SKW3693 HPN → ATL Jul 8, 00:05 UTCJul 8, 01:25 UTC1h 20m
2026-07-07 SKW3693 HPN → ATL Jul 7, 21:25 UTCJul 7, 23:05 UTC1h 40m
2026-07-07 SKW3944 - Jul 7, 17:50 UTCJul 7, 18:25 UTC35m
2026-07-07 SKW3944 - Jul 7, 16:10 UTCJul 7, 16:35 UTC25m
2026-07-07 SKW4138 - Jul 7, 13:15 UTCJul 7, 14:20 UTC1h 5m
2026-07-07 SKW3774 - Jul 7, 02:45 UTCJul 7, 03:50 UTC1h 5m
2026-07-06 SKW3798 - Jul 6, 23:50 UTCJul 7, 01:10 UTC1h 20m
2026-07-06 SKW3798 - Jul 6, 21:20 UTCJul 6, 22:20 UTC1h 0m
2026-07-06 SKW3944 - Jul 6, 18:30 UTCJul 6, 19:00 UTC30m
2026-07-06 SKW3944 IDA → SLC Jul 6, 18:23 UTCJul 6, 18:57 UTC34m
2026-07-06 SKW3944 - Jul 6, 16:50 UTCJul 6, 17:10 UTC20m

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 N289SY page for operator, model, and routing details .

Mode-S A2F111 frequently asked

What is Mode-S code A2F111?
A2F111 is an ICAO 24-bit transponder address. Allocated to United States. Assigned to N289SY.
Where is Mode-S A2F111 registered?
Mode-S code A2F111 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 A2F111 broadcasting right now?
Yes. Mode-S A2F111 is currently airborne.
Hex, octal, and decimal Mode-S codes: what's the difference?
The same 24-bit identifier expressed in different bases: hex A2F111, octal 50570421, decimal 10,678,545.
What flights does A2F111 operate?
Mode-S A2F111 has broadcast 20 distinct callsigns, including SKW4454, SKW4179, SKW4108, SKW4078, SKW3786.