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 SKW4821 · 28,000 ft
Flights observed
714
Distinct callsigns
20
Country
US
Last broadcast
Jul 26, 19:55 UTC

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
SKW4821 SkyWest Airlines 39 2026-07-25
SKW6422 - 27 2026-07-12
SKW4822 SkyWest Airlines 25 2026-07-26
SKW4819 SkyWest Airlines 25 2026-07-26
SKW4823 SkyWest Airlines 23 2026-07-26
SKW4818 SkyWest Airlines 23 2026-07-26
SKW6394 - 19 2026-07-13
SKW4921 - 19 2026-07-16
SKW6268 - 18 2026-07-10
SKW4935 - 18 2026-07-09
SKW4811 - 18 2026-07-17
SKW6369 - 17 2026-07-15
SKW4922 - 17 2026-07-15
SKW4810 - 17 2026-07-14
SKW6406 - 16 2026-07-15
SKW4978 - 16 2026-07-10
SKW4812 - 16 2026-07-08
SKW6276 - 15 2026-07-11
SKW4889 - 14 2026-07-17
SKW4813 - 14 2026-07-13

Recent flights last 50

DateFlightRouteTakeoffLandingDuration
2026-07-26 SKW4818 BIS → DFW Jul 26, 18:00 UTCJul 26, 19:50 UTC1h 50m
2026-07-26 SKW4819 DFW → HRL Jul 26, 14:05 UTCJul 26, 16:05 UTC2h 0m
2026-07-26 SKW4822 DFW → FLG Jul 26, 10:50 UTCJul 26, 12:10 UTC1h 20m
2026-07-26 SKW4822 DFW → FLG Jul 26, 10:47 UTCJul 26, 12:07 UTC1h 20m
2026-07-26 SKW4823 PDX → PHX Jul 26, 02:55 UTCJul 26, 04:15 UTC1h 20m
2026-07-26 SKW4823 PDX → PHX Jul 26, 02:47 UTCJul 26, 04:01 UTC1h 14m
2026-07-25 SKW4821 DFW → GRI Jul 25, 23:35 UTCJul 26, 01:00 UTC1h 25m
2026-07-25 SKW4821 DFW → GRI Jul 25, 21:30 UTCJul 25, 22:40 UTC1h 10m
2026-07-25 SKW4818 BIS → DFW Jul 25, 17:35 UTCJul 25, 19:35 UTC2h 0m
2026-07-25 SKW4817 DFW → SGU Jul 25, 02:40 UTCJul 25, 04:45 UTC2h 5m
2026-07-24 SKW4821 DFW → GRI Jul 24, 23:25 UTCJul 25, 00:45 UTC1h 20m
2026-07-24 SKW4821 DFW → GRI Jul 24, 21:15 UTCJul 24, 22:30 UTC1h 15m
2026-07-24 SKW4818 BIS → DFW Jul 24, 17:30 UTCJul 24, 19:30 UTC2h 0m
2026-07-24 SKW4819 DFW → HRL Jul 24, 14:00 UTCJul 24, 16:05 UTC2h 5m
2026-07-23 SKW4820 GTR → DFW Jul 23, 21:50 UTCJul 23, 23:00 UTC1h 10m
2026-07-23 SKW4820 GTR → DFW Jul 23, 19:15 UTCJul 23, 20:10 UTC55m
2026-07-23 SKW4890 ONT → PHX Jul 23, 17:20 UTCJul 23, 17:55 UTC35m
2026-07-23 SKW4890 ONT → PHX Jul 23, 16:20 UTCJul 23, 16:40 UTC20m
2026-07-23 SKW4816 SGU → DFW Jul 23, 13:15 UTCJul 23, 15:15 UTC2h 0m
2026-07-23 SKW4816 SGU → DFW Jul 23, 13:04 UTCJul 23, 15:31 UTC2h 27m
2026-07-23 SKW4817 DFW → SGU Jul 23, 02:40 UTCJul 23, 04:25 UTC1h 45m
2026-07-23 SKW4817 DFW → SGU Jul 23, 02:37 UTCJul 23, 04:40 UTC2h 3m
2026-07-22 SKW4821 - Jul 22, 23:20 UTCJul 23, 00:40 UTC1h 20m
2026-07-22 SKW4821 - Jul 22, 21:05 UTCJul 22, 22:15 UTC1h 10m
2026-07-22 SKW4818 BIS → DFW Jul 22, 17:35 UTCJul 22, 19:35 UTC2h 0m
2026-07-22 SKW4818 BIS → DFW Jul 22, 17:24 UTCJul 22, 19:34 UTC2h 10m
2026-07-22 SKW4819 DFW → HRL Jul 22, 14:10 UTCJul 22, 16:00 UTC1h 50m
2026-07-22 SKW4819 DFW → HRL Jul 22, 14:09 UTCJul 22, 16:20 UTC2h 11m
2026-07-22 SKW4822 DFW → FLG Jul 22, 11:35 UTCJul 22, 12:20 UTC45m
2026-07-22 SKW4822 DFW → FLG Jul 22, 10:44 UTCJul 22, 12:15 UTC1h 31m
2026-07-22 SKW4823 PDX → PHX Jul 22, 03:00 UTCJul 22, 04:10 UTC1h 10m
2026-07-21 SKW4820 - Jul 21, 21:10 UTCJul 21, 22:15 UTC1h 5m
2026-07-21 SKW4820 GTR → DFW Jul 21, 20:56 UTCJul 21, 22:15 UTC1h 19m
2026-07-21 SKW4820 - Jul 21, 18:45 UTCJul 21, 19:45 UTC1h 0m
2026-07-21 SKW4890 ONT → PHX Jul 21, 16:15 UTCJul 21, 16:40 UTC25m
2026-07-21 SKW4890 ONT → PHX Jul 21, 15:10 UTCJul 21, 15:30 UTC20m
2026-07-21 SKW4816 SGU → DFW Jul 21, 11:40 UTCJul 21, 14:05 UTC2h 25m
2026-07-21 SKW4817 DFW → SGU Jul 21, 02:50 UTCJul 21, 04:45 UTC1h 55m
2026-07-20 SKW4821 - Jul 20, 23:25 UTCJul 21, 00:45 UTC1h 19m
2026-07-20 SKW4821 GRI → DFW Jul 20, 23:20 UTCJul 21, 00:40 UTC1h 20m
2026-07-20 SKW4821 - Jul 20, 21:05 UTCJul 20, 22:15 UTC1h 10m
2026-07-20 SKW4818 BIS → DFW Jul 20, 17:55 UTCJul 20, 19:55 UTC2h 0m
2026-07-20 SKW4818 BIS → DFW Jul 20, 17:40 UTCJul 20, 19:50 UTC2h 10m
2026-07-20 SKW4819 - Jul 20, 14:05 UTCJul 20, 15:40 UTC1h 35m
2026-07-20 SKW4819 DFW → SGU Jul 20, 14:03 UTCJul 20, 16:01 UTC1h 58m
2026-07-20 SKW4822 - Jul 20, 10:50 UTCJul 20, 12:20 UTC1h 30m
2026-07-20 SKW4823 - Jul 20, 02:55 UTCJul 20, 04:10 UTC1h 15m
2026-07-20 SKW4823 DFW → GRI Jul 20, 02:52 UTCJul 20, 04:14 UTC1h 22m
2026-07-19 SKW4821 - Jul 19, 23:35 UTCJul 20, 01:00 UTC1h 25m
2026-07-19 SKW4821 - Jul 19, 21:10 UTCJul 19, 22:35 UTC1h 25m

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 SKW4821, SKW6422, SKW4822, SKW4819, SKW4823.