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sensors Mode-S transponder

A0C5C6

ICAO 24-bit transponder address · allocated to United States

Currently assigned to N149SY · EMBRAER ERJ-170-200 (long wing) · operated by SKYWEST AIRLINES INC

Hex
A0C5C6
Octal
50142706
Decimal
10,536,390
Country
US
Tail
N149SY
Type
E75L
No current signal · last broadcast Jul 2, 20:40 UTC
Flights observed
475
Distinct callsigns
20
Country
US
Last broadcast
Jul 2, 20:40 UTC

Last known position

Most recent position reported by Mode-S A0C5C6.

Country allocation

The ICAO 24-bit address A0C5C6 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
SKW6006 SkyWest Airlines 9 2026-05-30
SKW5798 - 5 2026-06-24
SKW5654 SkyWest Airlines 5 2026-06-27
SKW5477 SkyWest Airlines 5 2026-06-29
SKW6001 SkyWest Airlines 4 2026-05-17
SKW5681 SkyWest Airlines 4 2026-06-13
SKW5646 SkyWest Airlines 4 2026-04-28
SKW5605 SkyWest Airlines 4 2026-05-21
SKW5596 SkyWest Airlines 4 2026-05-16
SKW5475 - 4 2026-06-28
SKW5414 - 4 2026-06-24
SKW5369 SkyWest Airlines 4 2026-04-22
SKW5317 SkyWest Airlines 4 2026-06-06
SKW5304 - 4 2026-06-18
SKW5285 SkyWest Airlines 4 2026-06-03
SKW4805 SkyWest Airlines 4 2026-06-08
SKW4801 SkyWest Airlines 4 2026-05-25
SKW4795 - 4 2026-06-25
SKW4719 SkyWest Airlines 4 2026-06-10
SKW4697 SkyWest Airlines 4 2026-05-11

Recent flights last 50

DateFlightRouteTakeoffLandingDuration
2026-07-02 SKW6085 - Jul 2, 17:45 UTCJul 2, 20:40 UTC2h 55m
2026-07-02 SKW5561 - Jul 2, 14:35 UTCJul 2, 16:20 UTC1h 45m
2026-07-02 SKW5395 - Jul 2, 03:15 UTCJul 2, 03:55 UTC40m
2026-07-02 SKW5658 - Jul 2, 00:25 UTCJul 2, 01:00 UTC35m
2026-07-01 SKW5379 RNO → SFO Jul 1, 21:55 UTCJul 1, 22:30 UTC35m
2026-07-01 SKW5379 RNO → SFO Jul 1, 21:54 UTCJul 1, 22:43 UTC49m
2026-07-01 SKW5637 ORD → MDT Jul 1, 18:50 UTCJul 1, 20:00 UTC1h 10m
2026-07-01 SKW5315 DEN → TUL Jul 1, 16:27 UTCJul 1, 17:32 UTC1h 5m
2026-07-01 SKW5315 - Jul 1, 16:20 UTCJul 1, 17:30 UTC1h 10m
2026-07-01 SKW4706 - Jul 1, 13:30 UTCJul 1, 14:35 UTC1h 5m
2026-07-01 SKW519M - Jul 1, 01:45 UTCJul 1, 02:35 UTC50m
2026-06-30 SKW5429 MPJ → DEN Jun 30, 22:10 UTCJul 1, 00:35 UTC2h 25m
2026-06-30 SKW5340 - Jun 30, 19:30 UTCJun 30, 20:10 UTC40m
2026-06-30 SKW5340 IAH → LIT Jun 30, 19:39 UTCJun 30, 20:28 UTC49m
2026-06-30 SKW5223 - Jun 30, 16:10 UTCJun 30, 17:15 UTC1h 5m
2026-06-30 SKW5222 - Jun 30, 13:15 UTCJun 30, 14:20 UTC1h 5m
2026-06-30 SKW5222 IAH → MTY Jun 30, 13:16 UTCJun 30, 14:19 UTC1h 3m
2026-06-30 SKW5453 - Jun 30, 10:10 UTCJun 30, 11:10 UTC1h 0m
2026-06-29 SKW5278 - Jun 29, 23:29 UTCJun 30, 00:35 UTC1h 5m
2026-06-29 SKW5376 - Jun 29, 21:19 UTCJun 29, 22:24 UTC1h 5m
2026-06-29 SKW5692 CID → DEN Jun 29, 18:55 UTCJun 29, 20:04 UTC1h 10m
2026-06-29 SKW5901 - Jun 29, 16:00 UTCJun 29, 17:49 UTC1h 50m
2026-06-29 SKW5477 MBS → ORD Jun 29, 12:05 UTCJun 29, 13:54 UTC1h 50m
2026-06-29 SKW5477 MBS → ORD Jun 29, 12:11 UTCJun 29, 13:50 UTC1h 39m
2026-06-29 SKW5390 MSP → ORD Jun 29, 00:27 UTCJun 29, 01:04 UTC37m
2026-06-29 SKW5390 - Jun 29, 00:24 UTCJun 29, 01:20 UTC55m
2026-06-28 SKW5871 - Jun 28, 21:30 UTCJun 28, 22:39 UTC1h 10m
2026-06-28 SKW5511 YWG → ORD Jun 28, 18:15 UTCJun 28, 19:42 UTC1h 27m
2026-06-28 SKW5511 - Jun 28, 18:05 UTCJun 28, 19:55 UTC1h 50m
2026-06-28 SKW5475 - Jun 28, 14:39 UTCJun 28, 15:29 UTC50m
2026-06-28 SKW5475 ORD → YWG Jun 28, 14:53 UTCJun 28, 16:24 UTC1h 31m
2026-06-28 SKW4651 AVL → ORD Jun 28, 11:08 UTCJun 28, 12:22 UTC1h 14m
2026-06-28 SKW4651 - Jun 28, 10:50 UTCJun 28, 12:29 UTC1h 40m
2026-06-27 SKW5663 - Jun 27, 22:55 UTCJun 28, 00:04 UTC1h 10m
2026-06-27 SKW5654 SUN → ORD Jun 27, 19:19 UTCJun 27, 21:25 UTC2h 5m
2026-06-27 SKW5473 ORD → ECP Jun 27, 16:20 UTCJun 27, 18:09 UTC1h 49m
2026-06-27 SKW5473 - Jun 27, 16:20 UTCJun 27, 18:04 UTC1h 45m
2026-06-27 SKW5364 - Jun 27, 12:25 UTCJun 27, 14:05 UTC1h 40m
2026-06-27 SKW4727 DEN → OKC Jun 27, 03:15 UTCJun 27, 04:34 UTC1h 20m
2026-06-26 SKW5821 DEN → DEN Jun 26, 20:29 UTCJun 27, 01:19 UTC4h 50m
2026-06-26 SKW4804 - Jun 26, 17:40 UTCJun 26, 18:44 UTC1h 5m
2026-06-26 SKW4804 ICT → DEN Jun 26, 17:47 UTCJun 26, 18:44 UTC57m
2026-06-26 SKW4809 - Jun 26, 14:35 UTCJun 26, 16:09 UTC1h 35m
2026-06-26 SKW5500 ROA → ORD Jun 26, 10:56 UTCJun 26, 12:16 UTC1h 20m
2026-06-26 SKW5500 ROA → ORD Jun 26, 10:55 UTCJun 26, 12:29 UTC1h 35m
2026-06-25 SKW5405 - Jun 25, 23:55 UTCJun 26, 01:15 UTC1h 20m
2026-06-25 SKW4795 - Jun 25, 19:24 UTCJun 25, 20:59 UTC1h 35m
2026-06-25 SKW4795 TUL → ORD Jun 25, 19:30 UTCJun 25, 20:43 UTC1h 13m
2026-06-25 SKW5413 - Jun 25, 17:14 UTCJun 25, 18:24 UTC1h 10m
2026-06-25 SKW5284 SLP → IAH Jun 25, 13:20 UTCJun 25, 14:43 UTC1h 23m

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 N149SY page for operator, model, and routing details .

Mode-S A0C5C6 frequently asked

What is Mode-S code A0C5C6?
A0C5C6 is an ICAO 24-bit transponder address. Allocated to United States. Assigned to N149SY.
Where is Mode-S A0C5C6 registered?
Mode-S code A0C5C6 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 A0C5C6 broadcasting right now?
No active broadcast right now. Last signal was Jul 2, 20:40 UTC.
Hex, octal, and decimal Mode-S codes: what's the difference?
The same 24-bit identifier expressed in different bases: hex A0C5C6, octal 50142706, decimal 10,536,390.
What flights does A0C5C6 operate?
Mode-S A0C5C6 has broadcast 20 distinct callsigns, including SKW6006, SKW5798, SKW5654, SKW5477, SKW6001.