Apparatus

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sensors Mode-S transponder

A2BAB6

ICAO 24-bit transponder address · allocated to United States

Currently assigned to N275SY · EMBRAER ERJ-170-200 (long wing) · operated by SKYWEST AIRLINES INC

Hex
A2BAB6
Octal
50535266
Decimal
10,664,630
Country
US
Tail
N275SY
Type
E75L
No current signal · last broadcast 57m ago
Flights observed
333
Distinct callsigns
20
Country
US
Last broadcast
57m ago

Last known position

Most recent position reported by Mode-S A2BAB6.

Country allocation

The ICAO 24-bit address A2BAB6 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
SKW4082 - 18 2026-06-25
SKW4111 SkyWest Airlines 12 2026-06-25
SKW3760 - 12 2026-06-26
SKW4033 - 11 2026-06-19
SKW3717 - 10 2026-06-27
SKW3507 SkyWest Airlines 10 2026-06-23
SKW4102 SkyWest Airlines 9 2026-06-06
SKW4025 SkyWest Airlines 8 2026-06-05
SKW4019 SkyWest Airlines 8 2026-05-23
SKW3946 SkyWest Airlines 7 2026-06-21
SKW3939 - 7 2026-06-26
SKW3617 SkyWest Airlines 7 2026-06-05
SKW172E SkyWest Airlines 7 2026-05-23
SKW4095 - 6 2026-06-23
SKW3805 - 6 2026-06-24
SKW3504 - 6 2026-06-25
SKW4118 SkyWest Airlines 5 2026-06-20
SKW4097 SkyWest Airlines 5 2026-05-31
SKW4064 - 5 2026-06-20
SKW3771 SkyWest Airlines 5 2026-06-05

Recent flights last 50

DateFlightRouteTakeoffLandingDuration
2026-06-27 SKW3717 - Jun 27, 22:40 UTCJun 27, 23:29 UTC50m
2026-06-27 SKW3718 - Jun 27, 20:19 UTCJun 27, 21:44 UTC1h 25m
2026-06-27 SKW3718 SLC → TUS Jun 27, 15:39 UTCJun 27, 17:04 UTC1h 25m
2026-06-27 SKW4037 - Jun 27, 13:30 UTCJun 27, 14:09 UTC40m
2026-06-27 SKW3985 - Jun 27, 03:15 UTCJun 27, 03:40 UTC25m
2026-06-26 SKW3737 - Jun 26, 23:44 UTCJun 27, 01:15 UTC1h 30m
2026-06-26 SKW3776 - Jun 26, 21:39 UTCJun 26, 22:44 UTC1h 5m
2026-06-26 SKW4133 - Jun 26, 19:04 UTCJun 26, 20:40 UTC1h 35m
2026-06-26 SKW4133 ASE → LAX Jun 26, 18:31 UTCJun 26, 20:38 UTC2h 7m
2026-06-26 SKW4011 - Jun 26, 13:59 UTCJun 26, 17:09 UTC3h 10m
2026-06-26 SKW4011 ATL → ASE Jun 26, 13:59 UTCJun 26, 17:19 UTC3h 20m
2026-06-26 SKW3760 - Jun 26, 03:00 UTCJun 26, 04:00 UTC1h 0m
2026-06-26 SKW3760 OAJ → ATL Jun 26, 02:56 UTCJun 26, 03:59 UTC1h 3m
2026-06-26 SKW3939 - Jun 26, 00:59 UTCJun 26, 02:00 UTC1h 0m
2026-06-26 SKW3939 ATL → OAJ Jun 26, 01:06 UTCJun 26, 01:59 UTC53m
2026-06-25 SKW4111 FWA → ATL Jun 25, 22:24 UTCJun 25, 23:44 UTC1h 20m
2026-06-25 SKW4111 FWA → ATL Jun 25, 19:54 UTCJun 25, 21:05 UTC1h 10m
2026-06-25 SKW4082 - Jun 25, 17:05 UTCJun 25, 18:24 UTC1h 20m
2026-06-25 SKW4082 ATL → XNA Jun 25, 14:24 UTCJun 25, 15:54 UTC1h 30m
2026-06-25 SKW3504 - Jun 25, 11:10 UTCJun 25, 12:30 UTC1h 20m
2026-06-24 SKW3505 ATL → SHV Jun 24, 23:20 UTCJun 25, 00:44 UTC1h 25m
2026-06-24 SKW3805 - Jun 24, 21:09 UTCJun 24, 22:10 UTC1h 0m
2026-06-24 SKW3805 - Jun 24, 18:50 UTCJun 24, 19:44 UTC55m
2026-06-24 SKW3760 - Jun 24, 16:14 UTCJun 24, 17:20 UTC1h 5m
2026-06-24 SKW3760 OAJ → ATL Jun 24, 16:15 UTCJun 24, 17:12 UTC57m
2026-06-24 SKW3760 - Jun 24, 14:00 UTCJun 24, 15:00 UTC1h 0m
2026-06-24 SKW3905 MSP → MEM Jun 24, 11:14 UTCJun 24, 12:34 UTC1h 20m
2026-06-24 SKW4441 DTW → MCI Jun 24, 03:00 UTCJun 24, 04:30 UTC1h 30m
2026-06-23 SKW4448 SLC → SJC Jun 23, 22:55 UTCJun 23, 23:55 UTC1h 0m
2026-06-23 SKW4448 SLC → SJC Jun 23, 20:49 UTCJun 23, 21:45 UTC55m
2026-06-23 SKW3507 BOS → MKE Jun 23, 18:20 UTCJun 23, 19:29 UTC1h 10m
2026-06-23 SKW3507 BOS → MKE Jun 23, 18:12 UTCJun 23, 19:31 UTC1h 19m
2026-06-23 SKW3507 BOS → MKE Jun 23, 15:40 UTCJun 23, 17:04 UTC1h 25m
2026-06-23 SKW4117 HPN → ATL Jun 23, 13:15 UTCJun 23, 14:29 UTC1h 15m
2026-06-23 SKW4095 - Jun 23, 03:04 UTCJun 23, 03:54 UTC50m
2026-06-23 SKW4095 - Jun 23, 02:24 UTCJun 23, 03:00 UTC35m
2026-06-23 SKW4448 SLC → SJC Jun 23, 00:19 UTCJun 23, 01:20 UTC1h 0m
2026-06-22 SKW4448 SLC → SJC Jun 22, 22:19 UTCJun 22, 23:20 UTC1h 0m
2026-06-22 SKW3507 BOS → MKE Jun 22, 18:19 UTCJun 22, 19:34 UTC1h 15m
2026-06-22 SKW3507 BOS → MKE Jun 22, 15:29 UTCJun 22, 16:54 UTC1h 25m
2026-06-22 SKW4117 HPN → ATL Jun 22, 12:54 UTCJun 22, 14:14 UTC1h 20m
2026-06-22 SKW4095 - Jun 22, 01:55 UTCJun 22, 03:05 UTC1h 10m
2026-06-21 SKW3579 MSP → MSN Jun 21, 23:59 UTCJun 22, 00:29 UTC30m
2026-06-21 SKW3579 MSP → MSN Jun 21, 22:29 UTCJun 21, 23:00 UTC30m
2026-06-21 SKW3723 - Jun 21, 18:39 UTCJun 21, 20:24 UTC1h 45m
2026-06-21 SKW3723 ELH → ATL Jun 21, 18:32 UTCJun 21, 20:00 UTC1h 28m
2026-06-21 SKW3730 MSP → MSN Jun 21, 15:19 UTCJun 21, 16:54 UTC1h 35m
2026-06-21 SKW3946 ORD → JFK Jun 21, 11:24 UTCJun 21, 13:29 UTC2h 5m
2026-06-21 SKW3946 ORD → JFK Jun 21, 11:23 UTCJun 21, 13:48 UTC2h 25m
2026-06-20 SKW4118 OKC → LGA Jun 20, 23:59 UTCJun 21, 03:00 UTC3h 0m

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 N275SY page for operator, model, and routing details .

Mode-S A2BAB6 frequently asked

What is Mode-S code A2BAB6?
A2BAB6 is an ICAO 24-bit transponder address. Allocated to United States. Assigned to N275SY.
Where is Mode-S A2BAB6 registered?
Mode-S code A2BAB6 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 A2BAB6 broadcasting right now?
No active broadcast right now. Last signal was 57m ago.
Hex, octal, and decimal Mode-S codes: what's the difference?
The same 24-bit identifier expressed in different bases: hex A2BAB6, octal 50535266, decimal 10,664,630.
What flights does A2BAB6 operate?
Mode-S A2BAB6 has broadcast 20 distinct callsigns, including SKW4082, SKW4111, SKW3760, SKW4033, SKW3717.