Apparatus

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sensors Mode-S transponder

A23FE5

ICAO 24-bit transponder address · allocated to United States

Currently assigned to N244LR · BOMBARDIER Regional Jet CRJ-900 · operated by SKYWEST AIRLINES INC

Hex
A23FE5
Octal
50437745
Decimal
10,633,189
Country
US
Tail
N244LR
Type
CRJ9
Broadcasting now · callsign SKW4991 · 19,925 ft
Flights observed
631
Distinct callsigns
20
Country
US
Last broadcast
1h ago

Current position

A23FE5 is currently broadcasting. Map zoomed to live position.

Country allocation

The ICAO 24-bit address A23FE5 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
SKW6422 - 27 2026-07-12
SKW4821 SkyWest Airlines 26 2026-06-10
SKW6394 - 19 2026-07-13
SKW6268 - 18 2026-07-10
SKW4935 - 18 2026-07-09
SKW4822 SkyWest Airlines 18 2026-06-10
SKW4819 SkyWest Airlines 18 2026-06-11
SKW4921 - 17 2026-07-10
SKW4811 - 17 2026-07-11
SKW4978 - 16 2026-07-10
SKW4812 - 16 2026-07-08
SKW4810 - 16 2026-07-14
SKW6406 - 15 2026-07-06
SKW6369 - 15 2026-06-13
SKW6276 - 15 2026-07-11
SKW4922 - 15 2026-07-06
SKW4823 SkyWest Airlines 15 2026-06-10
SKW4818 SkyWest Airlines 14 2026-06-10
SKW4813 - 14 2026-07-13
SKW6453 - 13 2026-07-11

Recent flights last 50

DateFlightRouteTakeoffLandingDuration
2026-07-14 SKW4810 - Jul 14, 13:55 UTCJul 14, 14:40 UTC45m
2026-07-13 SKW4813 - Jul 13, 21:50 UTCJul 13, 22:35 UTC45m
2026-07-13 SKW4813 PHX → SGU Jul 13, 21:50 UTCJul 13, 22:45 UTC55m
2026-07-13 SKW6394 BFL → PHX Jul 13, 19:15 UTCJul 13, 20:30 UTC1h 15m
2026-07-13 SKW6394 BFL → PHX Jul 13, 19:17 UTCJul 13, 20:27 UTC1h 10m
2026-07-13 SKW6394 PHX → BFL Jul 13, 17:30 UTCJul 13, 18:25 UTC55m
2026-07-13 SKW4810 - Jul 13, 13:40 UTCJul 13, 14:20 UTC40m
2026-07-13 SKW4810 SGU → PHX Jul 13, 13:30 UTCJul 13, 14:19 UTC49m
2026-07-12 SKW4813 - Jul 12, 22:05 UTCJul 12, 22:45 UTC40m
2026-07-12 SKW4813 PHX → SGU Jul 12, 22:05 UTCJul 12, 22:47 UTC42m
2026-07-12 SKW6422 SLC → PHX Jul 12, 18:30 UTCJul 12, 19:45 UTC1h 15m
2026-07-12 SKW6422 PHX → SLC Jul 12, 16:01 UTCJul 12, 17:15 UTC1h 15m
2026-07-12 SKW4889 - Jul 12, 12:01 UTCJul 12, 13:25 UTC1h 25m
2026-07-12 SKW5009 - Jul 12, 02:50 UTCJul 12, 04:15 UTC1h 25m
2026-07-11 SKW6276 OKC → PHX Jul 11, 23:30 UTCJul 12, 01:30 UTC2h 0m
2026-07-11 SKW6276 PHX → OKC Jul 11, 20:25 UTCJul 11, 22:15 UTC1h 50m
2026-07-11 SKW4811 - Jul 11, 18:50 UTCJul 11, 19:35 UTC45m
2026-07-11 SKW4811 - Jul 11, 16:35 UTCJul 11, 17:25 UTC50m
2026-07-11 SKW6453 FSD → PHX Jul 11, 13:20 UTCJul 11, 15:35 UTC2h 15m
2026-07-11 SKW6452 PHX → FSD Jul 11, 02:20 UTCJul 11, 04:50 UTC2h 30m
2026-07-10 SKW6268 - Jul 10, 23:30 UTCJul 11, 01:00 UTC1h 30m
2026-07-10 SKW6268 - Jul 10, 21:00 UTCJul 10, 22:20 UTC1h 20m
2026-07-10 SKW4978 ELP → PHX Jul 10, 18:22 UTCJul 10, 19:18 UTC56m
2026-07-10 SKW4978 - Jul 10, 16:35 UTCJul 10, 19:15 UTC2h 40m
2026-07-10 SKW6327 SLC → PHX Jul 10, 13:35 UTCJul 10, 14:45 UTC1h 10m
2026-07-10 SKW6327 SLC → PHX Jul 10, 13:32 UTCJul 10, 14:44 UTC1h 12m
2026-07-10 SKW4921 PHX → SLC Jul 10, 03:45 UTCJul 10, 05:00 UTC1h 15m
2026-07-10 SKW4921 PHX → SLC Jul 10, 03:45 UTCJul 10, 04:59 UTC1h 14m
2026-07-10 SKW4928 SLC → PHX Jul 10, 01:00 UTCJul 10, 02:15 UTC1h 15m
2026-07-10 SKW4928 SLC → PHX Jul 10, 00:59 UTCJul 10, 02:14 UTC1h 15m
2026-07-09 SKW4928 PHX → SLC Jul 9, 22:40 UTCJul 9, 23:55 UTC1h 15m
2026-07-09 SKW4935 - Jul 9, 20:50 UTCJul 9, 21:15 UTC25m
2026-07-09 SKW4935 PHX → TUS Jul 9, 19:35 UTCJul 9, 20:00 UTC25m
2026-07-09 SKW6356 SBA → PHX Jul 9, 16:45 UTCJul 9, 18:00 UTC1h 15m
2026-07-09 SKW6356 SBA → PHX Jul 9, 16:43 UTCJul 9, 17:54 UTC1h 11m
2026-07-09 SKW6356 - Jul 9, 14:50 UTCJul 9, 16:00 UTC1h 10m
2026-07-09 SKW4889 - Jul 9, 11:40 UTCJul 9, 13:05 UTC1h 25m
2026-07-09 SKW5009 - Jul 9, 02:30 UTCJul 9, 03:55 UTC1h 25m
2026-07-08 SKW6276 OKC → PHX Jul 8, 23:25 UTCJul 9, 01:20 UTC1h 55m
2026-07-08 SKW6276 PHX → OKC Jul 8, 20:35 UTCJul 8, 22:40 UTC2h 5m
2026-07-08 SKW4812 - Jul 8, 18:35 UTCJul 8, 19:15 UTC40m
2026-07-08 SKW4812 SGU → PHX Jul 8, 18:25 UTCJul 8, 19:12 UTC47m
2026-07-08 SKW4811 - Jul 8, 16:35 UTCJul 8, 17:00 UTC25m
2026-07-08 SKW4811 PHX → SGU Jul 8, 16:31 UTCJul 8, 17:24 UTC53m
2026-07-08 SKW4810 - Jul 8, 13:35 UTCJul 8, 14:15 UTC40m
2026-07-07 SKW4813 - Jul 7, 21:50 UTCJul 7, 22:25 UTC35m
2026-07-07 SKW6394 BFL → PHX Jul 7, 19:20 UTCJul 7, 20:30 UTC1h 10m
2026-07-07 SKW6394 PHX → BFL Jul 7, 17:20 UTCJul 7, 18:20 UTC1h 0m
2026-07-07 SKW6431 - Jul 7, 14:55 UTCJul 7, 16:05 UTC1h 10m
2026-07-07 SKW6318 - Jul 7, 05:00 UTCJul 7, 06:05 UTC1h 5m

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 N244LR page for operator, model, and routing details .

Mode-S A23FE5 frequently asked

What is Mode-S code A23FE5?
A23FE5 is an ICAO 24-bit transponder address. Allocated to United States. Assigned to N244LR.
Where is Mode-S A23FE5 registered?
Mode-S code A23FE5 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 A23FE5 broadcasting right now?
Yes. Mode-S A23FE5 is currently airborne.
Hex, octal, and decimal Mode-S codes: what's the difference?
The same 24-bit identifier expressed in different bases: hex A23FE5, octal 50437745, decimal 10,633,189.
What flights does A23FE5 operate?
Mode-S A23FE5 has broadcast 20 distinct callsigns, including SKW6422, SKW4821, SKW6394, SKW6268, SKW4935.