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sensors Mode-S transponder

A0F70C

ICAO 24-bit transponder address · allocated to United States

Currently assigned to N161SY · EMBRAER ERJ-170-200 (long wing) · operated by SKYWEST AIRLINES INC

Hex
A0F70C
Octal
50173414
Decimal
10,549,004
Country
US
Tail
N161SY
Type
E75L
No current signal · last broadcast 2d ago
Flights observed
403
Distinct callsigns
20
Country
US
Last broadcast
2d ago

Last known position

Most recent position reported by Mode-S A0F70C.

Country allocation

The ICAO 24-bit address A0F70C 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
SKW5757 - 6 2026-07-12
SKW5654 - 5 2026-07-10
SKW5501 - 5 2026-07-08
SKW5475 - 5 2026-07-11
SKW5381 - 5 2026-07-09
SKW4672 - 5 2026-07-03
SKW5839 SkyWest Airlines 4 2026-05-06
SKW5787 SkyWest Airlines 4 2026-05-05
SKW5786 SkyWest Airlines 4 2026-05-31
SKW5687 SkyWest Airlines 4 2026-04-17
SKW5686 SkyWest Airlines 4 2026-04-17
SKW5672 SkyWest Airlines 4 2026-05-24
SKW5620 SkyWest Airlines 4 2026-05-20
SKW5598 SkyWest Airlines 4 2026-04-17
SKW5434 - 4 2026-07-03
SKW5412 - 4 2026-07-06
SKW5336 SkyWest Airlines 4 2026-05-20
SKW5216 - 4 2026-06-29
SKW4746 SkyWest Airlines 4 2026-04-26
SKW4703 SkyWest Airlines 4 2026-05-10

Recent flights last 50

DateFlightRouteTakeoffLandingDuration
2026-07-12 SKW5751 - Jul 12, 23:10 UTCJul 13, 00:50 UTC1h 40m
2026-07-12 SKW5757 - Jul 12, 20:15 UTCJul 12, 21:45 UTC1h 30m
2026-07-12 SKW5757 ORD → CLT Jul 12, 20:05 UTCJul 12, 21:44 UTC1h 39m
2026-07-12 SKW5901 - Jul 12, 15:15 UTCJul 12, 17:05 UTC1h 50m
2026-07-12 SKW5477 ORD → ORF Jul 12, 12:10 UTCJul 12, 13:55 UTC1h 45m
2026-07-12 SKW6050 DSM → ORD Jul 12, 00:10 UTCJul 12, 01:20 UTC1h 10m
2026-07-12 SKW6050 DSM → ORD Jul 12, 00:08 UTCJul 12, 01:05 UTC57m
2026-07-11 SKW5230 ORD → DSM Jul 11, 22:30 UTCJul 11, 23:20 UTC50m
2026-07-11 SKW5230 ORD → DSM Jul 11, 22:09 UTCJul 11, 23:15 UTC1h 6m
2026-07-11 SKW5511 YWG → ORD Jul 11, 18:10 UTCJul 11, 20:00 UTC1h 50m
2026-07-11 SKW5511 YWG → ORD Jul 11, 18:15 UTCJul 11, 19:46 UTC1h 31m
2026-07-11 SKW5475 - Jul 11, 14:50 UTCJul 11, 16:45 UTC1h 55m
2026-07-11 SKW5475 ORD → YWG Jul 11, 14:53 UTCJul 11, 16:44 UTC1h 51m
2026-07-11 SKW5500 ROA → ORD Jul 11, 10:50 UTCJul 11, 12:40 UTC1h 50m
2026-07-10 SKW5405 ORD → ROA Jul 10, 23:55 UTCJul 11, 01:15 UTC1h 20m
2026-07-10 SKW5654 - Jul 10, 21:25 UTCJul 10, 21:30 UTC5m
2026-07-10 SKW5654 ECP → ORD Jul 10, 19:15 UTCJul 10, 21:30 UTC2h 16m
2026-07-10 SKW5654 ECP → ORD Jul 10, 19:18 UTCJul 10, 21:09 UTC1h 51m
2026-07-10 SKW5473 - Jul 10, 16:25 UTCJul 10, 18:10 UTC1h 45m
2026-07-10 SKW5611 - Jul 10, 11:15 UTCJul 10, 12:25 UTC1h 10m
2026-07-10 SKW5611 OMA → ORD Jul 10, 11:23 UTCJul 10, 12:15 UTC52m
2026-07-10 SKW5777 - Jul 10, 03:10 UTCJul 10, 04:25 UTC1h 15m
2026-07-10 SKW5777 ORD → OMA Jul 10, 02:37 UTCJul 10, 04:26 UTC1h 49m
2026-07-10 SKW5483 - Jul 10, 00:00 UTCJul 10, 00:45 UTC45m
2026-07-10 SKW5483 DTW → ORD Jul 10, 00:00 UTCJul 10, 00:35 UTC35m
2026-07-09 SKW5954 ORD → DTW Jul 9, 21:45 UTCJul 9, 22:35 UTC50m
2026-07-09 SKW5954 ORD → DTW Jul 9, 21:33 UTCJul 9, 22:39 UTC1h 6m
2026-07-09 SKW5381 - Jul 9, 18:50 UTCJul 9, 19:40 UTC50m
2026-07-09 SKW5756 ORD → DTW Jul 9, 16:40 UTCJul 9, 17:30 UTC50m
2026-07-09 SKW5756 ORD → DTW Jul 9, 16:28 UTCJul 9, 17:29 UTC1h 1m
2026-07-09 SKW4664 BDL → ORD Jul 9, 13:00 UTCJul 9, 15:20 UTC2h 20m
2026-07-09 SKW4664 BDL → ORD Jul 9, 13:04 UTCJul 9, 15:06 UTC2h 2m
2026-07-08 SKW4791 - Jul 8, 22:25 UTCJul 9, 00:10 UTC1h 45m
2026-07-08 SKW6019 - Jul 8, 19:10 UTCJul 8, 20:15 UTC1h 5m
2026-07-08 SKW5836 - Jul 8, 16:25 UTCJul 8, 17:35 UTC1h 10m
2026-07-08 SKW5501 - Jul 8, 12:45 UTCJul 8, 14:10 UTC1h 25m
2026-07-08 SKW5228 - Jul 8, 04:10 UTCJul 8, 05:20 UTC1h 10m
2026-07-07 SKW4749 - Jul 7, 22:25 UTCJul 7, 23:20 UTC55m
2026-07-07 SKW418R - Jul 7, 20:35 UTCJul 7, 21:20 UTC45m
2026-07-07 SKW5659 - Jul 7, 14:35 UTCJul 7, 17:15 UTC2h 40m
2026-07-07 SKW5533 - Jul 7, 01:15 UTCJul 7, 03:35 UTC2h 20m
2026-07-06 SKW5929 - Jul 6, 23:00 UTCJul 6, 23:05 UTC5m
2026-07-06 SKW5929 SDF → ORD Jul 6, 22:06 UTCJul 6, 22:41 UTC35m
2026-07-06 SKW5412 ORD → SDF Jul 6, 20:04 UTCJul 6, 20:50 UTC46m
2026-07-06 SKW5412 - Jul 6, 19:50 UTCJul 6, 20:45 UTC55m
2026-07-06 SKW5976 - Jul 6, 14:50 UTCJul 6, 17:35 UTC2h 45m
2026-07-06 SKW5976 FCA → ORD Jul 6, 14:55 UTCJul 6, 17:20 UTC2h 25m
2026-07-06 SKW6021 - Jul 6, 01:45 UTCJul 6, 04:15 UTC2h 30m
2026-07-05 SKW5334 ORF → ORD Jul 5, 22:10 UTCJul 6, 00:10 UTC2h 0m
2026-07-05 SKW5449 - Jul 5, 18:40 UTCJul 5, 20:30 UTC1h 50m

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 N161SY page for operator, model, and routing details .

Mode-S A0F70C frequently asked

What is Mode-S code A0F70C?
A0F70C is an ICAO 24-bit transponder address. Allocated to United States. Assigned to N161SY.
Where is Mode-S A0F70C registered?
Mode-S code A0F70C 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 A0F70C broadcasting right now?
No active broadcast right now. Last signal was 2d ago.
Hex, octal, and decimal Mode-S codes: what's the difference?
The same 24-bit identifier expressed in different bases: hex A0F70C, octal 50173414, decimal 10,549,004.
What flights does A0F70C operate?
Mode-S A0F70C has broadcast 20 distinct callsigns, including SKW5757, SKW5654, SKW5501, SKW5475, SKW5381.