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sensors Mode-S transponder

A23CCB

ICAO 24-bit transponder address · allocated to United States

Currently assigned to N243SY · EMBRAER ERJ-170-200 (long wing) · operated by SKYWEST AIRLINES INC

Hex
A23CCB
Octal
50436313
Decimal
10,632,395
Country
US
Tail
N243SY
Type
E75L
Broadcasting now · callsign SKW4035 · 33,000 ft
Flights observed
618
Distinct callsigns
20
Country
US
Last broadcast
2h ago

Current position

A23CCB is currently broadcasting. Map zoomed to live position.

Country allocation

The ICAO 24-bit address A23CCB 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
SKW3951 SkyWest Airlines 11 2026-06-07
SKW3876 - 11 2026-07-06
SKW3991 SkyWest Airlines 10 2026-05-14
SKW4134 - 9 2026-06-19
SKW3903 - 9 2026-06-23
SKW107K - 9 2026-07-01
SKW3772 - 8 2026-07-01
SKW4068 SkyWest Airlines 7 2026-05-28
SKW3669 - 7 2026-07-01
SKW4175 - 6 2026-07-06
SKW4146 - 6 2026-07-05
SKW4063 - 6 2026-06-23
SKW4042 SkyWest Airlines 6 2026-05-24
SKW4016 - 6 2026-07-06
SKW3896 - 6 2026-06-21
SKW3822 SkyWest Airlines 6 2026-06-07
SKW3779 SkyWest Airlines 6 2026-05-14
SKW3777 - 6 2026-07-14
SKW3759 SkyWest Airlines 6 2026-06-08
SKW3706 - 6 2026-07-14

Recent flights last 50

DateFlightRouteTakeoffLandingDuration
2026-07-14 SKW4012 - Jul 14, 22:20 UTCJul 14, 23:50 UTC1h 29m
2026-07-14 SKW4012 MSP → XNA Jul 14, 19:45 UTCJul 14, 21:05 UTC1h 20m
2026-07-14 SKW3699 IAD → MSP Jul 14, 16:35 UTCJul 14, 18:40 UTC2h 5m
2026-07-14 SKW3699 MSP → IAD Jul 14, 13:25 UTCJul 14, 15:40 UTC2h 15m
2026-07-14 SKW3864 - Jul 14, 11:10 UTCJul 14, 11:55 UTC45m
2026-07-14 SKW3706 - Jul 14, 03:05 UTCJul 14, 05:00 UTC1h 55m
2026-07-14 SKW3706 SLC → OMA Jul 14, 02:58 UTCJul 14, 04:53 UTC1h 55m
2026-07-14 SKW3777 - Jul 14, 00:30 UTCJul 14, 01:45 UTC1h 15m
2026-07-14 SKW3777 FAT → SLC Jul 14, 00:31 UTCJul 14, 01:31 UTC1h 0m
2026-07-13 SKW3777 - Jul 13, 21:50 UTCJul 13, 23:05 UTC1h 15m
2026-07-13 SKW3833 - Jul 13, 19:35 UTCJul 13, 20:45 UTC1h 10m
2026-07-13 SKW3833 LWS → SLC Jul 13, 19:34 UTCJul 13, 20:44 UTC1h 10m
2026-07-13 SKW3833 - Jul 13, 17:20 UTCJul 13, 18:20 UTC1h 0m
2026-07-13 SKW3874 - Jul 13, 13:20 UTCJul 13, 15:15 UTC1h 55m
2026-07-13 SKW3706 - Jul 13, 05:25 UTCJul 13, 07:20 UTC1h 55m
2026-07-13 SKW3852 - Jul 13, 03:01 UTCJul 13, 04:15 UTC1h 15m
2026-07-13 SKW3852 - Jul 13, 00:25 UTCJul 13, 01:35 UTC1h 10m
2026-07-12 SKW3768 - Jul 12, 22:50 UTCJul 12, 23:20 UTC30m
2026-07-12 SKW3768 TWF → SLC Jul 12, 22:46 UTCJul 12, 23:18 UTC32m
2026-07-12 SKW3768 - Jul 12, 20:05 UTCJul 12, 21:30 UTC1h 25m
2026-07-12 SKW3768 - Jul 12, 18:15 UTCJul 12, 18:25 UTC10m
2026-07-12 SKW3768 - Jul 12, 17:10 UTCJul 12, 17:45 UTC35m
2026-07-12 SKW117W COS → SLC Jul 12, 14:30 UTCJul 12, 15:40 UTC1h 10m
2026-07-12 SKW3788 SLC → COS Jul 12, 03:10 UTCJul 12, 04:25 UTC1h 15m
2026-07-12 SKW144J LGB → SLC Jul 12, 00:01 UTCJul 12, 01:25 UTC1h 25m
2026-07-11 SKW108R SLC → LGB Jul 11, 21:15 UTCJul 11, 22:55 UTC1h 40m
2026-07-11 SKW4038 - Jul 11, 18:05 UTCJul 11, 19:15 UTC1h 10m
2026-07-11 SKW102P - Jul 11, 16:00 UTCJul 11, 17:05 UTC1h 5m
2026-07-11 SKW102P SLC → BIL Jul 11, 15:53 UTCJul 11, 16:55 UTC1h 2m
2026-07-11 SKW4022 - Jul 11, 14:10 UTCJul 11, 14:40 UTC30m
2026-07-11 SKW3925 - Jul 11, 02:35 UTCJul 11, 04:15 UTC1h 40m
2026-07-11 SKW3925 MSP → JAC Jul 11, 02:32 UTCJul 11, 04:40 UTC2h 8m
2026-07-11 SKW3851 - Jul 11, 00:00 UTCJul 11, 01:05 UTC1h 5m
2026-07-10 SKW3851 - Jul 10, 21:55 UTCJul 10, 22:55 UTC1h 0m
2026-07-10 SKW4032 MSN → MSP Jul 10, 19:55 UTCJul 10, 20:45 UTC50m
2026-07-10 SKW4032 MSN → MSP Jul 10, 20:00 UTCJul 10, 20:44 UTC44m
2026-07-10 SKW4032 MSP → MSN Jul 10, 18:20 UTCJul 10, 19:05 UTC45m
2026-07-10 SKW3561 BOI → SEA Jul 10, 16:05 UTCJul 10, 16:40 UTC35m
2026-07-10 SKW3561 BOI → SEA Jul 10, 14:20 UTCJul 10, 14:55 UTC35m
2026-07-10 SKW3996 IAD → MSP Jul 10, 10:15 UTCJul 10, 12:30 UTC2h 15m
2026-07-10 SKW4129 MSP → IAD Jul 10, 01:05 UTCJul 10, 03:00 UTC1h 55m
2026-07-09 SKW4005 YWG → MSP Jul 9, 22:50 UTCJul 9, 23:50 UTC1h 0m
2026-07-09 SKW182J MSP → YWG Jul 9, 20:37 UTCJul 9, 21:32 UTC55m
2026-07-09 SKW182J - Jul 9, 20:30 UTCJul 9, 20:45 UTC15m
2026-07-09 SKW157E YWG → MSP Jul 9, 17:50 UTCJul 9, 18:55 UTC1h 5m
2026-07-09 SKW157E YWG → MSP Jul 9, 17:59 UTCJul 9, 18:50 UTC51m
2026-07-09 SKW197F MSP → YWG Jul 9, 15:30 UTCJul 9, 16:35 UTC1h 5m
2026-07-09 SKW4458 - Jul 9, 13:20 UTCJul 9, 14:10 UTC50m
2026-07-09 SKW4458 MKE → MSP Jul 9, 13:15 UTCJul 9, 14:09 UTC54m
2026-07-09 SKW4468 - Jul 9, 01:50 UTCJul 9, 02:35 UTC45m

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 N243SY page for operator, model, and routing details .

Mode-S A23CCB frequently asked

What is Mode-S code A23CCB?
A23CCB is an ICAO 24-bit transponder address. Allocated to United States. Assigned to N243SY.
Where is Mode-S A23CCB registered?
Mode-S code A23CCB 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 A23CCB broadcasting right now?
Yes. Mode-S A23CCB is currently airborne.
Hex, octal, and decimal Mode-S codes: what's the difference?
The same 24-bit identifier expressed in different bases: hex A23CCB, octal 50436313, decimal 10,632,395.
What flights does A23CCB operate?
Mode-S A23CCB has broadcast 20 distinct callsigns, including SKW3951, SKW3876, SKW3991, SKW4134, SKW3903.