Apparatus

Try JFK, AAL1290, BAW, or N225AN.

sensors Mode-S transponder

AAC87B

ICAO 24-bit transponder address · allocated to United States

Currently assigned to N794SK · BOMBARDIER Regional Jet CRJ-700 · operated by SKYWEST AIRLINES INC

Hex
AAC87B
Octal
52544173
Decimal
11,192,443
Country
US
Tail
N794SK
Type
CRJ7
No current signal · last broadcast 1h ago
Flights observed
96
Distinct callsigns
20
Country
US
Last broadcast
1h ago

Last known position

Most recent position reported by Mode-S AAC87B.

Country allocation

The ICAO 24-bit address AAC87B 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
SKW5506 SkyWest Airlines 3 2026-05-14
SKW5827 SkyWest Airlines 2 2026-05-24
SKW5825 SkyWest Airlines 2 2026-05-24
SKW5673 SkyWest Airlines 2 2026-05-14
SKW5649 SkyWest Airlines 2 2026-05-07
SKW5606 SkyWest Airlines 2 2026-05-22
SKW5565 SkyWest Airlines 2 2026-05-22
SKW5504 SkyWest Airlines 2 2026-05-14
SKW5494 SkyWest Airlines 2 2026-05-10
SKW5431 SkyWest Airlines 2 2026-05-24
SKW5417 SkyWest Airlines 2 2026-05-12
SKW5361 SkyWest Airlines 2 2026-05-22
SKW5287 SkyWest Airlines 2 2026-05-18
SKW5221 SkyWest Airlines 2 2026-05-10
SKW5197 SkyWest Airlines 2 2026-05-16
SKW5195 SkyWest Airlines 2 2026-05-17
SKW5055 SkyWest Airlines 2 2026-05-21
SKW4745 SkyWest Airlines 2 2026-05-15
SKW4699 SkyWest Airlines 2 2026-05-14
SKW4688 SkyWest Airlines 2 2026-05-25

Recent flights last 50

DateFlightRouteTakeoffLandingDuration
2026-05-25 SKW5350 RDM → SFO May 25, 23:49 UTCMay 26, 01:24 UTC1h 35m
2026-05-25 SKW5337 ORD → SAV May 25, 21:35 UTCMay 25, 22:55 UTC1h 20m
2026-05-25 SKW4778 MKE → ORD May 25, 18:15 UTCMay 25, 19:35 UTC1h 20m
2026-05-25 SKW4688 DEN → FAR May 25, 15:57 UTCMay 25, 17:15 UTC1h 18m
2026-05-25 SKW4688 DEN → FAR May 25, 15:55 UTCMay 25, 17:20 UTC1h 25m
2026-05-25 SKW5495 ORD → MKE May 25, 13:20 UTCMay 25, 14:15 UTC55m
2026-05-25 SKW4684 DEN → SAF May 25, 01:55 UTCMay 25, 02:20 UTC25m
2026-05-24 SKW5431 LNK → DEN May 24, 23:00 UTCMay 24, 23:15 UTC15m
2026-05-24 SKW5827 PSP → SFO May 24, 20:05 UTCMay 24, 21:00 UTC55m
2026-05-24 SKW5825 SFO → BOI May 24, 17:30 UTCMay 24, 18:40 UTC1h 10m
2026-05-24 SKW5825 SFO → BOI May 24, 17:33 UTCMay 24, 18:33 UTC1h 0m
2026-05-24 SKW5215 LGA → ORD May 24, 15:25 UTCMay 24, 16:40 UTC1h 15m
2026-05-24 SKW5500 SMF → SFO May 24, 11:30 UTCMay 24, 12:50 UTC1h 20m
2026-05-24 SKW5229 SFO → TUS May 24, 00:25 UTCMay 24, 01:50 UTC1h 25m
2026-05-23 SKW4685 EUG → SFO May 23, 20:45 UTCMay 23, 22:00 UTC1h 15m
2026-05-23 SKW5851 ASE → LAX May 23, 18:15 UTCMay 23, 19:05 UTC50m
2026-05-23 SKW5572 CVG → ORD May 23, 16:30 UTCMay 23, 17:20 UTC50m
2026-05-23 SKW5958 DTW → ORD May 23, 14:45 UTCMay 23, 15:25 UTC40m
2026-05-23 SKW4670 ORD → LEX May 23, 12:20 UTCMay 23, 13:40 UTC1h 20m
2026-05-23 SKW5275 SUN → SFO May 23, 01:25 UTCMay 23, 02:20 UTC55m
2026-05-22 SKW5606 GEG → SFO May 22, 22:15 UTCMay 22, 23:55 UTC1h 40m
2026-05-22 SKW5565 SUN → SFO May 22, 19:50 UTCMay 22, 21:10 UTC1h 20m
2026-05-22 SKW5361 SLC → SFO May 22, 15:05 UTCMay 22, 16:40 UTC1h 35m
2026-05-22 SKW5361 SLC → SFO May 22, 15:03 UTCMay 22, 16:30 UTC1h 27m
2026-05-22 SKW5330 SFO → MFR May 22, 12:50 UTCMay 22, 14:20 UTC1h 30m
2026-05-22 SKW5076 CIU → ORD May 22, 10:15 UTCMay 22, 11:20 UTC1h 4m
2026-05-21 SKW5055 DEN → GCC May 21, 22:35 UTCMay 21, 23:55 UTC1h 20m
2026-05-21 SKW5055 DEN → GCC May 21, 19:30 UTCMay 21, 21:20 UTC1h 50m
2026-05-21 SKW5071 SUX → ORD May 21, 17:20 UTCMay 21, 18:25 UTC1h 5m
2026-05-20 SKW499U ACV → SFO May 20, 12:55 UTCMay 20, 14:40 UTC1h 45m
2026-05-19 SKW5553 SFO → SNA May 19, 16:55 UTCMay 19, 18:25 UTC1h 30m
2026-05-18 SKW5699 IND → ORD May 18, 11:30 UTCMay 18, 12:55 UTC1h 25m
2026-05-18 SKW5287 FAT → SFO May 18, 03:05 UTCMay 18, 04:20 UTC1h 15m
2026-05-17 SKW4744 ONT → SFO May 17, 23:30 UTCMay 18, 01:05 UTC1h 35m
2026-05-17 SKW5354 SFO → STS May 17, 20:45 UTCMay 17, 22:01 UTC1h 15m
2026-05-17 SKW5371 FAR → ORD May 17, 17:25 UTCMay 17, 18:55 UTC1h 30m
2026-05-17 SKW5195 SLC → DTW May 17, 14:33 UTCMay 17, 15:55 UTC1h 22m
2026-05-17 SKW5195 SLC → DTW May 17, 14:30 UTCMay 17, 15:55 UTC1h 25m
2026-05-16 SKW4677 CVG → ORD May 16, 14:01 UTCMay 16, 14:16 UTC15m
2026-05-16 SKW5197 BNA → ORD May 16, 02:10 UTCMay 16, 02:30 UTC20m
2026-05-16 SKW5197 BNA → ORD May 16, 01:50 UTCMay 16, 02:30 UTC40m
2026-05-15 SKW4634 FAR → ORD May 15, 22:10 UTCMay 15, 23:50 UTC1h 40m
2026-05-15 SKW5930 ORD → FAR May 15, 19:40 UTCMay 15, 21:10 UTC1h 30m
2026-05-15 SKW4745 DEN → TYS May 15, 15:10 UTCMay 15, 16:30 UTC1h 20m
2026-05-15 SKW4745 DEN → TYS May 15, 14:58 UTCMay 15, 16:26 UTC1h 28m
2026-05-15 SKW4736 DTW → ORD May 15, 12:50 UTCMay 15, 13:58 UTC1h 8m
2026-05-15 SKW5784 HLN → DEN May 15, 10:25 UTCMay 15, 11:35 UTC1h 10m
2026-05-14 SKW499X ORD → CMX May 14, 22:30 UTCMay 14, 23:30 UTC1h 0m
2026-05-14 SKW4699 BZN → SFO May 14, 19:15 UTCMay 14, 20:55 UTC1h 40m
2026-05-14 SKW4699 BZN → SFO May 14, 19:12 UTCMay 14, 20:45 UTC1h 33m

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 N794SK page for operator, model, and routing details .

Mode-S AAC87B frequently asked

What is Mode-S code AAC87B?
AAC87B is an ICAO 24-bit transponder address. Allocated to United States. Assigned to N794SK.
Where is Mode-S AAC87B registered?
Mode-S code AAC87B 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 AAC87B broadcasting right now?
No active broadcast right now. Last signal was 1h ago.
Hex, octal, and decimal Mode-S codes: what's the difference?
The same 24-bit identifier expressed in different bases: hex AAC87B, octal 52544173, decimal 11,192,443.
What flights does AAC87B operate?
Mode-S AAC87B has broadcast 20 distinct callsigns, including SKW5506, SKW5827, SKW5825, SKW5673, SKW5649.