Apparatus

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sensors Mode-S transponder

A2B348

ICAO 24-bit transponder address · allocated to United States

Currently assigned to N273SY · EMBRAER ERJ-170-200 (long wing) · operated by SKYWEST AIRLINES INC

Hex
A2B348
Octal
50531510
Decimal
10,662,728
Country
US
Tail
N273SY
Type
E75L
No current signal · last broadcast 2d ago
Flights observed
286
Distinct callsigns
20
Country
US
Last broadcast
2d ago

Last known position

Most recent position reported by Mode-S A2B348.

Country allocation

The ICAO 24-bit address A2B348 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
SKW4102 SkyWest Airlines 18 2026-05-26
SKW3710 SkyWest Airlines 12 2026-05-25
SKW4019 SkyWest Airlines 11 2026-05-20
SKW3681 SkyWest Airlines 11 2026-05-25
SKW3507 SkyWest Airlines 11 2026-06-13
SKW3925 SkyWest Airlines 10 2026-05-27
SKW3771 SkyWest Airlines 10 2026-05-25
SKW4082 SkyWest Airlines 9 2026-06-11
SKW172E SkyWest Airlines 9 2026-05-20
SKW4454 SkyWest Airlines 8 2026-05-08
SKW4111 SkyWest Airlines 7 2026-06-13
SKW4025 SkyWest Airlines 7 2026-05-21
SKW3805 - 7 2026-06-14
SKW3716 SkyWest Airlines 7 2026-06-07
SKW4097 - 6 2026-06-14
SKW4038 SkyWest Airlines 5 2026-05-06
SKW3842 SkyWest Airlines 5 2026-06-07
SKW4144 SkyWest Airlines 4 2026-05-26
SKW3798 SkyWest Airlines 4 2026-05-03
SKW3717 SkyWest Airlines 4 2026-05-20

Recent flights last 50

DateFlightRouteTakeoffLandingDuration
2026-06-15 SKW3505 - Jun 15, 01:04 UTCJun 15, 02:24 UTC1h 20m
2026-06-14 SKW3805 - Jun 14, 22:00 UTCJun 14, 23:05 UTC1h 5m
2026-06-14 SKW3805 - Jun 14, 19:15 UTCJun 14, 20:10 UTC55m
2026-06-14 SKW4097 - Jun 14, 16:00 UTCJun 14, 18:05 UTC2h 5m
2026-06-14 SKW4097 - Jun 14, 13:35 UTCJun 14, 14:50 UTC1h 15m
2026-06-14 SKW3758 ATL → CRW Jun 14, 10:15 UTCJun 14, 11:15 UTC1h 0m
2026-06-14 SKW3939 - Jun 14, 01:20 UTCJun 14, 02:20 UTC1h 0m
2026-06-13 SKW4111 FWA → ATL Jun 13, 22:25 UTCJun 13, 23:45 UTC1h 20m
2026-06-13 SKW4111 FWA → ATL Jun 13, 19:55 UTCJun 13, 21:05 UTC1h 10m
2026-06-13 SKW3507 BOS → MKE Jun 13, 17:20 UTCJun 13, 18:25 UTC1h 5m
2026-06-13 SKW3507 BOS → MKE Jun 13, 17:18 UTCJun 13, 18:24 UTC1h 6m
2026-06-13 SKW3507 BOS → MKE Jun 13, 14:30 UTCJun 13, 15:55 UTC1h 25m
2026-06-13 SKW4107 MSP → CMH Jun 13, 10:10 UTCJun 13, 11:35 UTC1h 25m
2026-06-12 SKW4109 MSP → MSN Jun 12, 23:55 UTCJun 13, 01:20 UTC1h 25m
2026-06-12 SKW3805 MDT → ATL Jun 12, 20:55 UTCJun 12, 21:55 UTC1h 0m
2026-06-12 SKW3805 MDT → ATL Jun 12, 18:35 UTCJun 12, 19:35 UTC1h 0m
2026-06-12 SKW4097 CMH → MSP Jun 12, 16:10 UTCJun 12, 17:40 UTC1h 30m
2026-06-12 SKW4097 CMH → MSP Jun 12, 13:20 UTCJun 12, 15:05 UTC1h 45m
2026-06-12 SKW3758 ATL → CRW Jun 12, 10:25 UTCJun 12, 11:30 UTC1h 5m
2026-06-12 SKW3758 ATL → CRW Jun 12, 10:06 UTCJun 12, 11:25 UTC1h 19m
2026-06-12 SKW3939 ABY → ATL Jun 12, 01:05 UTCJun 12, 02:10 UTC1h 5m
2026-06-11 SKW4111 FWA → ATL Jun 11, 22:40 UTCJun 12, 00:00 UTC1h 20m
2026-06-11 SKW4111 FWA → ATL Jun 11, 22:43 UTCJun 12, 00:00 UTC1h 17m
2026-06-11 SKW4111 FWA → ATL Jun 11, 20:10 UTCJun 11, 21:30 UTC1h 20m
2026-06-11 SKW4082 SEA → SFO Jun 11, 17:10 UTCJun 11, 18:35 UTC1h 25m
2026-06-11 SKW4082 SEA → SFO Jun 11, 14:35 UTCJun 11, 16:05 UTC1h 30m
2026-06-11 SKW3905 MSP → MEM Jun 11, 11:15 UTCJun 11, 12:35 UTC1h 20m
2026-06-11 SKW3905 MSP → MEM Jun 11, 11:15 UTCJun 11, 12:34 UTC1h 19m
2026-06-11 SKW4441 DTW → MCI Jun 11, 03:00 UTCJun 11, 04:25 UTC1h 25m
2026-06-10 SKW3579 MSP → MSN Jun 10, 23:40 UTCJun 11, 00:05 UTC25m
2026-06-10 SKW3579 MSP → MSN Jun 10, 21:55 UTCJun 10, 22:20 UTC25m
2026-06-10 SKW3507 BOS → MKE Jun 10, 18:20 UTCJun 10, 19:30 UTC1h 10m
2026-06-10 SKW3507 BOS → MKE Jun 10, 18:11 UTCJun 10, 19:30 UTC1h 19m
2026-06-10 SKW3507 BOS → MKE Jun 10, 15:40 UTCJun 10, 16:55 UTC1h 15m
2026-06-10 SKW3946 ORD → JFK Jun 10, 11:10 UTCJun 10, 13:45 UTC2h 35m
2026-06-10 SKW3946 ORD → JFK Jun 10, 11:18 UTCJun 10, 13:36 UTC2h 18m
2026-06-10 SKW4118 OKC → LGA Jun 10, 00:05 UTCJun 10, 02:50 UTC2h 45m
2026-06-09 SKW3805 MDT → ATL Jun 9, 21:15 UTCJun 9, 22:40 UTC1h 25m
2026-06-09 SKW4097 CMH → MSP Jun 9, 16:55 UTCJun 9, 19:40 UTC2h 45m
2026-06-09 SKW4097 CMH → MSP Jun 9, 13:35 UTCJun 9, 15:00 UTC1h 25m
2026-06-09 SKW4107 MSP → CMH Jun 9, 10:45 UTCJun 9, 12:20 UTC1h 35m
2026-06-09 SKW4109 MSP → MSN Jun 9, 00:00 UTCJun 9, 01:20 UTC1h 20m
2026-06-08 SKW4442 BOS → JFK Jun 8, 21:20 UTCJun 8, 22:45 UTC1h 25m
2026-06-08 SKW4442 BOS → JFK Jun 8, 18:30 UTCJun 8, 20:15 UTC1h 45m
2026-06-08 SKW3924 DTW → MSN Jun 8, 14:10 UTCJun 8, 16:55 UTC2h 45m
2026-06-08 SKW3704 GFK → MSP Jun 8, 00:30 UTCJun 8, 01:55 UTC1h 25m
2026-06-08 SKW3704 GFK → MSP Jun 8, 00:36 UTCJun 8, 02:02 UTC1h 26m
2026-06-07 SKW3842 MSP → RAP Jun 7, 22:20 UTCJun 7, 23:15 UTC55m
2026-06-07 SKW3842 MSP → RAP Jun 7, 22:26 UTCJun 7, 23:11 UTC45m
2026-06-07 SKW3842 MSP → RAP Jun 7, 20:45 UTCJun 7, 21:35 UTC50m

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 N273SY page for operator, model, and routing details .

Mode-S A2B348 frequently asked

What is Mode-S code A2B348?
A2B348 is an ICAO 24-bit transponder address. Allocated to United States. Assigned to N273SY.
Where is Mode-S A2B348 registered?
Mode-S code A2B348 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 A2B348 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 A2B348, octal 50531510, decimal 10,662,728.
What flights does A2B348 operate?
Mode-S A2B348 has broadcast 20 distinct callsigns, including SKW4102, SKW3710, SKW4019, SKW3681, SKW3507.