Apparatus

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sensors Mode-S transponder

A0F355

ICAO 24-bit transponder address · allocated to United States

Currently assigned to N160SY · EMBRAER ERJ-170-200 (long wing) · operated by SKYWEST AIRLINES INC

Hex
A0F355
Octal
50171525
Decimal
10,548,053
Country
US
Tail
N160SY
Type
E75L
Broadcasting now · callsign SKW4640 · 32,000 ft
Flights observed
625
Distinct callsigns
20
Country
US
Last broadcast
Jul 26, 21:00 UTC

Current position

A0F355 is currently broadcasting. Map zoomed to live position.

Country allocation

The ICAO 24-bit address A0F355 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
SKW6004 - 6 2026-07-02
SKW5625 - 6 2026-07-21
SKW4746 - 6 2026-07-09
SKW4668 SkyWest Airlines 6 2026-07-21
SKW5601 SkyWest Airlines 5 2026-05-13
SKW6027 SkyWest Airlines 4 2026-07-22
SKW5924 SkyWest Airlines 4 2026-07-22
SKW5871 - 4 2026-07-08
SKW5858 SkyWest Airlines 4 2026-04-23
SKW5811 - 4 2026-07-12
SKW5810 SkyWest Airlines 4 2026-06-20
SKW5795 - 4 2026-07-15
SKW5774 SkyWest Airlines 4 2026-05-14
SKW5699 SkyWest Airlines 4 2026-06-14
SKW5672 SkyWest Airlines 4 2026-05-17
SKW5631 SkyWest Airlines 4 2026-07-22
SKW5574 - 4 2026-07-02
SKW5572 - 4 2026-07-16
SKW5543 - 4 2026-06-18
SKW5540 - 4 2026-07-20

Recent flights last 50

DateFlightRouteTakeoffLandingDuration
2026-07-26 SKW4783 ORD → AVL Jul 26, 20:20 UTCJul 26, 21:00 UTC40m
2026-07-26 SKW5991 SHV → IAH Jul 26, 17:10 UTCJul 26, 18:40 UTC1h 30m
2026-07-26 SKW5476 AUS → LAX Jul 26, 13:55 UTCJul 26, 15:30 UTC1h 35m
2026-07-26 SKW4716 SAN → SFO Jul 26, 10:45 UTCJul 26, 12:35 UTC1h 50m
2026-07-25 SKW5677 SLC → ORD Jul 25, 20:15 UTCJul 25, 21:44 UTC1h 29m
2026-07-25 SKW5677 SLC → ORD Jul 25, 20:10 UTCJul 25, 21:50 UTC1h 40m
2026-07-25 SKW5991 SHV → IAH Jul 25, 17:00 UTCJul 25, 18:45 UTC1h 45m
2026-07-25 SKW5476 AUS → LAX Jul 25, 14:05 UTCJul 25, 15:50 UTC1h 45m
2026-07-25 SKW5969 SFO → SEA Jul 25, 11:05 UTCJul 25, 12:35 UTC1h 30m
2026-07-25 SKW5269 DEN → SJC Jul 25, 03:15 UTCJul 25, 04:35 UTC1h 20m
2026-07-24 SKW5380 SLC → SFO Jul 24, 23:00 UTCJul 25, 01:00 UTC2h 0m
2026-07-24 SKW5380 SLC → SFO Jul 24, 23:03 UTCJul 25, 00:47 UTC1h 44m
2026-07-24 SKW4805 MSN → ORD Jul 24, 20:00 UTCJul 24, 21:45 UTC1h 45m
2026-07-24 SKW5490 BHM → ORD Jul 24, 16:40 UTCJul 24, 18:00 UTC1h 20m
2026-07-24 SKW6029 SAT → SFO Jul 24, 14:25 UTCJul 24, 15:40 UTC1h 15m
2026-07-24 SKW5988 ORD → ASE Jul 24, 11:35 UTCJul 24, 12:35 UTC1h 0m
2026-07-24 SKW4761 LGA → ORD Jul 24, 04:00 UTCJul 24, 04:55 UTC55m
2026-07-23 SKW5969 SFO → SEA Jul 23, 22:20 UTCJul 24, 00:50 UTC2h 30m
2026-07-23 SKW5269 DEN → SJC Jul 23, 04:40 UTCJul 23, 06:15 UTC1h 35m
2026-07-23 SKW5788 ORD → LGA Jul 23, 01:40 UTCJul 23, 02:00 UTC20m
2026-07-22 SKW5789 RDU → IAH Jul 22, 20:05 UTCJul 22, 20:20 UTC15m
2026-07-22 SKW5789 RDU → IAH Jul 22, 19:51 UTCJul 22, 20:33 UTC42m
2026-07-22 SKW5288 - Jul 22, 16:45 UTCJul 22, 18:15 UTC1h 30m
2026-07-22 SKW5288 DSM → DEN Jul 22, 16:49 UTCJul 22, 18:12 UTC1h 23m
2026-07-22 SKW4801 IND → ORD Jul 22, 14:10 UTCJul 22, 15:30 UTC1h 20m
2026-07-22 SKW5924 FCA → DEN Jul 22, 11:10 UTCJul 22, 12:45 UTC1h 35m
2026-07-22 SKW6027 SFO → BOI Jul 22, 04:25 UTCJul 22, 05:25 UTC1h 0m
2026-07-22 SKW5631 SBP → SFO Jul 22, 02:15 UTCJul 22, 03:25 UTC1h 10m
2026-07-22 SKW5631 SBP → SFO Jul 22, 02:11 UTCJul 22, 03:13 UTC1h 2m
2026-07-21 SKW5354 SFO → STS Jul 21, 23:15 UTCJul 22, 00:20 UTC1h 5m
2026-07-21 SKW5625 BFL → SFO Jul 21, 21:05 UTCJul 21, 21:45 UTC40m
2026-07-21 SKW5625 BFL → SFO Jul 21, 21:06 UTCJul 21, 21:43 UTC37m
2026-07-21 SKW4668 PHX → SFO Jul 21, 18:15 UTCJul 21, 20:15 UTC2h 0m
2026-07-21 SKW4668 PHX → SFO Jul 21, 18:14 UTCJul 21, 20:07 UTC1h 53m
2026-07-21 SKW5558 SAV → DEN Jul 21, 13:40 UTCJul 21, 16:05 UTC2h 25m
2026-07-21 SKW4774 LIT → IAH Jul 21, 00:06 UTCJul 21, 01:53 UTC1h 47m
2026-07-21 SKW4774 LIT → IAH Jul 21, 00:00 UTCJul 21, 02:00 UTC2h 0m
2026-07-20 SKW5540 RDD → DEN Jul 20, 19:50 UTCJul 20, 22:25 UTC2h 35m
2026-07-20 SKW5540 RDD → DEN Jul 20, 19:55 UTCJul 20, 22:19 UTC2h 24m
2026-07-20 SKW572M SFO → RDD Jul 20, 17:45 UTCJul 20, 18:20 UTC35m
2026-07-20 SKW5596 - Jul 20, 11:55 UTCJul 20, 12:30 UTC35m
2026-07-20 SKW5596 MTY → SFO Jul 20, 11:49 UTCJul 20, 15:10 UTC3h 21m
2026-07-20 SKW5242 ORD → ROC Jul 20, 00:15 UTCJul 20, 01:25 UTC1h 10m
2026-07-19 SKW5580 - Jul 19, 20:20 UTCJul 19, 22:05 UTC1h 45m
2026-07-19 SKW5580 STL → IAH Jul 19, 20:24 UTCJul 19, 22:00 UTC1h 36m
2026-07-19 SKW5397 - Jul 19, 17:25 UTCJul 19, 19:20 UTC1h 55m
2026-07-19 SKW5397 IAH → STL Jul 19, 17:22 UTCJul 19, 19:12 UTC1h 50m
2026-07-18 SKW5284 - Jul 18, 23:30 UTCJul 19, 15:15 UTC15h 45m
2026-07-18 SKW5376 ERI → ORD Jul 18, 21:00 UTCJul 18, 21:55 UTC55m
2026-07-18 SKW5376 ERI → ORD Jul 18, 20:53 UTCJul 18, 21:54 UTC1h 1m

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 N160SY page for operator, model, and routing details .

Mode-S A0F355 frequently asked

What is Mode-S code A0F355?
A0F355 is an ICAO 24-bit transponder address. Allocated to United States. Assigned to N160SY.
Where is Mode-S A0F355 registered?
Mode-S code A0F355 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 A0F355 broadcasting right now?
Yes. Mode-S A0F355 is currently airborne.
Hex, octal, and decimal Mode-S codes: what's the difference?
The same 24-bit identifier expressed in different bases: hex A0F355, octal 50171525, decimal 10,548,053.
What flights does A0F355 operate?
Mode-S A0F355 has broadcast 20 distinct callsigns, including SKW6004, SKW5625, SKW4746, SKW4668, SKW5601.