Apparatus

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sensors Mode-S transponder

A0E5D7

ICAO 24-bit transponder address · allocated to United States

Currently assigned to N157SY · EMBRAER ERJ-170-200 (long wing) · operated by SKYWEST AIRLINES INC

Hex
A0E5D7
Octal
50162727
Decimal
10,544,599
Country
US
Tail
N157SY
Type
E75L
No current signal · last broadcast Jul 26, 21:25 UTC
Flights observed
559
Distinct callsigns
20
Country
US
Last broadcast
Jul 26, 21:25 UTC

Last known position

Most recent position reported by Mode-S A0E5D7.

Country allocation

The ICAO 24-bit address A0E5D7 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
SKW6005 - 8 2026-07-03
SKW5504 - 8 2026-07-03
SKW5840 SkyWest Airlines 6 2026-06-15
SKW5593 SkyWest Airlines 6 2026-07-19
SKW5531 - 6 2026-07-20
SKW4732 SkyWest Airlines 6 2026-07-22
SKW5972 SkyWest Airlines 5 2026-07-25
SKW5876 - 5 2026-07-21
SKW5659 - 5 2026-07-12
SKW5587 SkyWest Airlines 5 2026-07-23
SKW5434 - 5 2026-06-27
SKW5356 SkyWest Airlines 5 2026-05-15
SKW5324 SkyWest Airlines 5 2026-07-20
SKW4640 SkyWest Airlines 5 2026-05-15
SKW5924 - 4 2026-07-07
SKW5875 - 4 2026-07-20
SKW5871 - 4 2026-07-10
SKW5765 - 4 2026-07-19
SKW5763 SkyWest Airlines 4 2026-07-19
SKW5701 SkyWest Airlines 4 2026-07-24

Recent flights last 50

DateFlightRouteTakeoffLandingDuration
2026-07-26 SKW5837 SHV → IAH Jul 26, 20:40 UTCJul 26, 21:25 UTC45m
2026-07-26 SKW5253 LAX → SFO Jul 26, 17:05 UTCJul 26, 18:55 UTC1h 50m
2026-07-26 SKW5558 SAV → DEN Jul 26, 13:30 UTCJul 26, 15:40 UTC2h 10m
2026-07-26 SKW5558 SAV → DEN Jul 26, 13:33 UTCJul 26, 15:39 UTC2h 6m
2026-07-26 SKW4774 LIT → IAH Jul 26, 01:10 UTCJul 26, 03:05 UTC1h 55m
2026-07-25 SKW5972 SBA → SFO Jul 25, 18:45 UTCJul 25, 19:50 UTC1h 5m
2026-07-25 SKW5497 DEN → ICT Jul 25, 16:20 UTCJul 25, 17:15 UTC55m
2026-07-25 SKW5667 ORD → MSN Jul 25, 11:25 UTCJul 25, 12:45 UTC1h 20m
2026-07-25 SKW4712 ORD → CHA Jul 25, 03:30 UTCJul 25, 04:45 UTC1h 15m
2026-07-24 SKW5632 SNA → SFO Jul 24, 23:45 UTCJul 25, 01:15 UTC1h 30m
2026-07-24 SKW5632 SNA → SFO Jul 24, 23:33 UTCJul 25, 01:05 UTC1h 32m
2026-07-24 SKW4783 ORD → AVL Jul 24, 20:15 UTCJul 24, 20:55 UTC40m
2026-07-24 SKW5288 TUL → ORD Jul 24, 16:50 UTCJul 24, 18:20 UTC1h 30m
2026-07-24 SKW4801 IND → ORD Jul 24, 14:25 UTCJul 24, 15:50 UTC1h 25m
2026-07-24 SKW5701 SYR → ORD Jul 24, 11:20 UTCJul 24, 12:45 UTC1h 25m
2026-07-24 SKW5701 SYR → ORD Jul 24, 11:24 UTCJul 24, 12:40 UTC1h 16m
2026-07-24 SKW309L DEN → FSD Jul 24, 03:50 UTCJul 24, 05:00 UTC1h 10m
2026-07-24 SKW5582 MLI → ORD Jul 24, 00:55 UTCJul 24, 02:50 UTC1h 55m
2026-07-24 SKW5582 MLI → ORD Jul 24, 00:54 UTCJul 24, 02:45 UTC1h 51m
2026-07-23 SKW4766 CHS → ORD Jul 23, 21:12 UTCJul 23, 22:37 UTC1h 25m
2026-07-23 SKW4766 CHS → ORD Jul 23, 20:55 UTCJul 23, 22:40 UTC1h 45m
2026-07-23 SKW5587 BOI → ORD Jul 23, 18:15 UTCJul 23, 19:25 UTC1h 10m
2026-07-23 SKW5587 BOI → ORD Jul 23, 18:10 UTCJul 23, 19:07 UTC57m
2026-07-23 SKW753Z ORD → OMA Jul 23, 16:01 UTCJul 23, 16:40 UTC39m
2026-07-23 SKW753Z ORD → OMA Jul 23, 15:40 UTCJul 23, 16:50 UTC1h 10m
2026-07-23 SKW5790 ORD → CRW Jul 23, 11:55 UTCJul 23, 14:00 UTC2h 5m
2026-07-23 SKW4638 BFL → SFO Jul 23, 01:50 UTCJul 23, 04:15 UTC2h 25m
2026-07-22 SKW4732 ASE → IAH Jul 22, 21:00 UTCJul 22, 23:45 UTC2h 45m
2026-07-22 SKW4732 ASE → IAH Jul 22, 20:53 UTCJul 22, 23:20 UTC2h 27m
2026-07-22 SKW5424 DEN → TUS Jul 22, 17:25 UTCJul 22, 19:40 UTC2h 15m
2026-07-22 SKW5424 DEN → TUS Jul 22, 17:29 UTCJul 22, 19:34 UTC2h 5m
2026-07-22 SKW5572 CVG → ORD Jul 22, 14:45 UTCJul 22, 15:35 UTC50m
2026-07-22 SKW5958 DTW → ORD Jul 22, 12:47 UTCJul 22, 13:09 UTC22m
2026-07-22 SKW5958 DTW → ORD Jul 22, 12:30 UTCJul 22, 13:15 UTC45m
2026-07-22 SKW4707 MSN → ORD Jul 22, 10:19 UTCJul 22, 10:26 UTC7m
2026-07-21 SKW4740 GTF → DEN Jul 21, 23:15 UTCJul 21, 23:45 UTC30m
2026-07-21 SKW5382 DCA → IAH Jul 21, 19:45 UTCJul 21, 21:20 UTC1h 35m
2026-07-21 SKW5321 ORD → CMH Jul 21, 17:40 UTCJul 21, 18:20 UTC40m
2026-07-21 SKW5876 - Jul 21, 13:05 UTCJul 21, 15:05 UTC2h 0m
2026-07-20 SKW5875 - Jul 20, 22:05 UTCJul 20, 23:55 UTC1h 50m
2026-07-20 SKW5531 - Jul 20, 18:50 UTCJul 20, 19:55 UTC1h 5m
2026-07-20 SKW5324 ASE → ORD Jul 20, 16:30 UTCJul 20, 17:50 UTC1h 20m
2026-07-20 SKW4706 IDA → DEN Jul 20, 13:30 UTCJul 20, 14:30 UTC1h 0m
2026-07-20 SKW519M DEN → IDA Jul 20, 01:45 UTCJul 20, 02:30 UTC45m
2026-07-19 SKW5260 SFO → SNA Jul 19, 21:55 UTCJul 19, 23:50 UTC1h 55m
2026-07-19 SKW5765 - Jul 19, 19:45 UTCJul 19, 20:30 UTC45m
2026-07-19 SKW5765 IAH → SHV Jul 19, 19:47 UTCJul 19, 20:33 UTC46m
2026-07-19 SKW5525 - Jul 19, 17:05 UTCJul 19, 18:15 UTC1h 10m
2026-07-19 SKW5525 MEM → IAH Jul 19, 17:01 UTCJul 19, 18:13 UTC1h 12m
2026-07-19 SKW5593 DEN → SBP Jul 19, 14:39 UTCJul 19, 15:53 UTC1h 14m

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 N157SY page for operator, model, and routing details .

Mode-S A0E5D7 frequently asked

What is Mode-S code A0E5D7?
A0E5D7 is an ICAO 24-bit transponder address. Allocated to United States. Assigned to N157SY.
Where is Mode-S A0E5D7 registered?
Mode-S code A0E5D7 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 A0E5D7 broadcasting right now?
No active broadcast right now. Last signal was Jul 26, 21:25 UTC.
Hex, octal, and decimal Mode-S codes: what's the difference?
The same 24-bit identifier expressed in different bases: hex A0E5D7, octal 50162727, decimal 10,544,599.
What flights does A0E5D7 operate?
Mode-S A0E5D7 has broadcast 20 distinct callsigns, including SKW6005, SKW5504, SKW5840, SKW5593, SKW5531.