Apparatus

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sensors Mode-S transponder

A64E2A

ICAO 24-bit transponder address · allocated to United States

Currently assigned to N505SY · EMBRAER ERJ-170-200 (long wing) · operated by SKYWEST AIRLINES INC

Hex
A64E2A
Octal
51447052
Decimal
10,898,986
Country
US
Tail
N505SY
Type
E75L
No current signal · last broadcast 40m ago
Flights observed
305
Distinct callsigns
20
Country
US
Last broadcast
40m ago

Last known position

Most recent position reported by Mode-S A64E2A.

Country allocation

The ICAO 24-bit address A64E2A 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
SKW6308 SkyWest Airlines 18 2026-05-19
SKW6185 SkyWest Airlines 15 2026-05-14
SKW6422 SkyWest Airlines 13 2026-04-26
SKW4992 SkyWest Airlines 10 2026-05-19
SKW6378 SkyWest Airlines 7 2026-05-03
SKW719A SkyWest Airlines 6 2026-05-04
SKW6404 SkyWest Airlines 6 2026-05-29
SKW6347 SkyWest Airlines 6 2026-05-11
SKW6283 SkyWest Airlines 6 2026-05-05
SKW6240 SkyWest Airlines 6 2026-05-05
SKW6214 SkyWest Airlines 6 2026-05-14
SKW4991 SkyWest Airlines 6 2026-05-16
SKW4980 SkyWest Airlines 6 2026-04-20
SKW4957 SkyWest Airlines 6 2026-05-26
SKW4951 SkyWest Airlines 6 2026-05-14
SKW6326 SkyWest Airlines 5 2026-05-19
SKW6217 SkyWest Airlines 5 2026-04-26
SKW6209 SkyWest Airlines 5 2026-05-06
SKW6190 SkyWest Airlines 5 2026-05-25
SKW4962 SkyWest Airlines 5 2026-05-14

Recent flights last 50

DateFlightRouteTakeoffLandingDuration
2026-05-29 SKW4944 PHX → PSC May 29, 23:50 UTCMay 30, 00:30 UTC40m
2026-05-29 SKW6257 BNA → ORD May 29, 20:05 UTCMay 29, 22:50 UTC2h 45m
2026-05-29 SKW6257 BNA → ORD May 29, 17:00 UTCMay 29, 19:05 UTC2h 5m
2026-05-29 SKW6404 SFO → PHX May 29, 13:45 UTCMay 29, 15:20 UTC1h 35m
2026-05-29 SKW6510 LAX → SFO May 29, 06:25 UTCMay 29, 07:40 UTC1h 15m
2026-05-29 SKW6346 ORD → BNA May 29, 02:40 UTCMay 29, 03:55 UTC1h 15m
2026-05-29 SKW6346 ORD → BNA May 29, 02:33 UTCMay 29, 03:39 UTC1h 6m
2026-05-29 SKW6346 ORD → BNA May 29, 00:50 UTCMay 29, 01:55 UTC1h 5m
2026-05-28 SKW6307 DFW → SHV May 28, 20:20 UTCMay 28, 23:20 UTC3h 0m
2026-05-28 SKW6307 DFW → SHV May 28, 20:10 UTCMay 28, 23:10 UTC3h 0m
2026-05-28 SKW6307 DFW → SHV May 28, 16:40 UTCMay 28, 19:05 UTC2h 25m
2026-05-28 SKW4895 DFW → MFE May 28, 12:35 UTCMay 28, 15:25 UTC2h 50m
2026-05-28 SKW4898 TUL → ORD May 28, 00:45 UTCMay 28, 03:10 UTC2h 25m
2026-05-27 SKW6188 ORD → DTW May 27, 21:50 UTCMay 27, 23:00 UTC1h 10m
2026-05-27 SKW6188 ORD → DTW May 27, 21:50 UTCMay 27, 22:49 UTC59m
2026-05-27 SKW6188 ORD → DTW May 27, 19:45 UTCMay 27, 20:45 UTC1h 0m
2026-05-27 SKW6265 SFO → LAX May 27, 14:25 UTCMay 27, 15:25 UTC1h 0m
2026-05-27 SKW4908 LAX → SMF May 27, 05:09 UTCMay 27, 06:15 UTC1h 5m
2026-05-27 SKW4908 LAX → SMF May 27, 05:20 UTCMay 27, 06:16 UTC56m
2026-05-27 SKW4958 ORD → MKE May 27, 00:39 UTCMay 27, 02:39 UTC2h 0m
2026-05-26 SKW4958 ORD → MKE May 26, 21:14 UTCMay 26, 23:05 UTC1h 50m
2026-05-26 SKW4957 DFW → GGG May 26, 18:10 UTCMay 26, 20:15 UTC2h 5m
2026-05-26 SKW4957 DFW → GGG May 26, 18:09 UTCMay 26, 20:14 UTC2h 5m
2026-05-26 SKW4957 DFW → GGG May 26, 15:09 UTCMay 26, 17:09 UTC2h 0m
2026-05-26 SKW6227 MCI → ORD May 26, 11:20 UTCMay 26, 14:20 UTC3h 0m
2026-05-26 SKW6224 ABQ → LAX May 26, 02:55 UTCMay 26, 05:45 UTC2h 50m
2026-05-26 SKW6224 ABQ → LAX May 26, 02:50 UTCMay 26, 05:42 UTC2h 52m
2026-05-25 SKW6190 ORD → DTW May 25, 23:45 UTCMay 26, 00:29 UTC45m
2026-05-25 SKW6190 ORD → DTW May 25, 21:45 UTCMay 25, 22:30 UTC45m
2026-05-25 SKW9909 BHM → ORD May 25, 18:20 UTCMay 25, 19:05 UTC45m
2026-05-24 SKW6425 MAF → DFW May 24, 15:40 UTCMay 24, 16:25 UTC45m
2026-05-24 SKW6294 SFO → LAX May 24, 13:20 UTCMay 24, 14:20 UTC1h 0m
2026-05-24 SKW6294 SFO → LAX May 24, 13:18 UTCMay 24, 14:16 UTC58m
2026-05-24 SKW6510 LAX → SFO May 24, 05:50 UTCMay 24, 06:45 UTC55m
2026-05-24 SKW6510 LAX → SFO May 24, 05:49 UTCMay 24, 06:52 UTC1h 3m
2026-05-23 SKW4971 DFW → LRD May 23, 23:50 UTCMay 24, 03:15 UTC3h 25m
2026-05-23 SKW4971 DFW → LRD May 23, 19:45 UTCMay 23, 22:35 UTC2h 50m
2026-05-23 SKW6482 ASE → AUS May 23, 13:45 UTCMay 23, 16:45 UTC3h 0m
2026-05-23 SKW6187 DFW → PVU May 23, 01:55 UTCMay 23, 05:00 UTC3h 4m
2026-05-22 SKW6190 ORD → DTW May 22, 23:48 UTCMay 23, 00:29 UTC41m
2026-05-22 SKW6190 ORD → DTW May 22, 23:50 UTCMay 23, 00:30 UTC40m
2026-05-22 SKW6190 ORD → DTW May 22, 21:40 UTCMay 22, 22:25 UTC45m
2026-05-22 SKW4957 DFW → GGG May 22, 17:40 UTCMay 22, 19:35 UTC1h 55m
2026-05-22 SKW4957 DFW → GGG May 22, 17:34 UTCMay 22, 19:35 UTC2h 1m
2026-05-22 SKW4957 DFW → GGG May 22, 14:45 UTCMay 22, 16:35 UTC1h 50m
2026-05-22 SKW4958 ORD → MKE May 22, 01:01 UTCMay 22, 03:01 UTC2h 0m
2026-05-22 SKW4958 ORD → MKE May 22, 01:00 UTCMay 22, 03:00 UTC2h 0m
2026-05-21 SKW4958 ORD → MKE May 21, 21:20 UTCMay 21, 23:20 UTC2h 0m
2026-05-21 SKW4977 HRL → ORD May 21, 18:20 UTCMay 21, 20:00 UTC1h 40m
2026-05-21 SKW4977 HRL → ORD May 21, 15:40 UTCMay 21, 17:10 UTC1h 30m

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 N505SY page for operator, model, and routing details .

Mode-S A64E2A frequently asked

What is Mode-S code A64E2A?
A64E2A is an ICAO 24-bit transponder address. Allocated to United States. Assigned to N505SY.
Where is Mode-S A64E2A registered?
Mode-S code A64E2A 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 A64E2A broadcasting right now?
No active broadcast right now. Last signal was 40m ago.
Hex, octal, and decimal Mode-S codes: what's the difference?
The same 24-bit identifier expressed in different bases: hex A64E2A, octal 51447052, decimal 10,898,986.
What flights does A64E2A operate?
Mode-S A64E2A has broadcast 20 distinct callsigns, including SKW6308, SKW6185, SKW6422, SKW4992, SKW6378.