Apparatus

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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 26d ago
Flights observed
214
Distinct callsigns
20
Country
US
Last broadcast
26d 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
SKW5977 SkyWest Airlines 5 2026-06-07
SKW5820 SkyWest Airlines 5 2026-06-03
SKW5654 SkyWest Airlines 5 2026-06-12
SKW5532 SkyWest Airlines 5 2026-06-07
SKW5869 SkyWest Airlines 4 2026-06-07
SKW5825 SkyWest Airlines 4 2026-06-13
SKW5896 SkyWest Airlines 3 2026-06-06
SKW5851 SkyWest Airlines 3 2026-06-01
SKW5752 SkyWest Airlines 3 2026-06-11
SKW5572 SkyWest Airlines 3 2026-06-10
SKW5506 SkyWest Airlines 3 2026-05-14
SKW5500 SkyWest Airlines 3 2026-06-09
SKW5361 SkyWest Airlines 3 2026-05-26
SKW5350 SkyWest Airlines 3 2026-05-27
SKW5337 SkyWest Airlines 3 2026-05-27
SKW5233 - 3 2026-06-14
SKW5221 SkyWest Airlines 3 2026-06-14
SKW5215 SkyWest Airlines 3 2026-06-13
SKW5055 SkyWest Airlines 3 2026-06-10
SKW4792 SkyWest Airlines 3 2026-06-06

Recent flights last 50

DateFlightRouteTakeoffLandingDuration
2026-06-15 SKW5191 OGS → IAD Jun 15, 14:40 UTCJun 15, 17:20 UTC2h 40m
2026-06-14 SKW4743 - Jun 14, 22:50 UTCJun 14, 23:35 UTC45m
2026-06-14 SKW5233 - Jun 14, 20:25 UTCJun 14, 21:00 UTC35m
2026-06-14 SKW5233 DEN → AMA Jun 14, 20:30 UTCJun 14, 21:14 UTC44m
2026-06-14 SKW4704 DEN → GJT Jun 14, 17:45 UTCJun 14, 18:25 UTC40m
2026-06-14 SKW4704 DEN → GJT Jun 14, 15:50 UTCJun 14, 16:30 UTC40m
2026-06-14 SKW5221 AMA → DEN Jun 14, 13:30 UTCJun 14, 14:25 UTC55m
2026-06-13 SKW5233 - Jun 13, 20:30 UTCJun 13, 21:05 UTC35m
2026-06-13 SKW5825 SFO → BOI Jun 13, 17:00 UTCJun 13, 18:20 UTC1h 20m
2026-06-13 SKW5825 SFO → BOI Jun 13, 17:05 UTCJun 13, 18:05 UTC1h 0m
2026-06-13 SKW5215 LGA → ORD Jun 13, 14:25 UTCJun 13, 16:10 UTC1h 45m
2026-06-13 SKW5215 LGA → ORD Jun 13, 14:33 UTCJun 13, 16:07 UTC1h 34m
2026-06-13 SKW5238 ORD → BNA Jun 13, 11:25 UTCJun 13, 12:25 UTC1h 0m
2026-06-13 SKW5982 SBA → SFO Jun 13, 03:45 UTCJun 13, 04:35 UTC49m
2026-06-13 SKW5336 FAT → SFO Jun 13, 00:40 UTCJun 13, 02:25 UTC1h 45m
2026-06-13 SKW5336 FAT → SFO Jun 13, 00:41 UTCJun 13, 01:53 UTC1h 12m
2026-06-12 SKW5657 SHV → IAH Jun 12, 22:25 UTCJun 12, 23:40 UTC1h 15m
2026-06-12 SKW5657 SHV → IAH Jun 12, 22:05 UTCJun 12, 23:41 UTC1h 36m
2026-06-12 SKW5654 SUN → ORD Jun 12, 18:40 UTCJun 12, 20:10 UTC1h 30m
2026-06-12 SKW5654 SUN → ORD Jun 12, 18:15 UTCJun 12, 19:55 UTC1h 40m
2026-06-12 SKW353F ORD → DEC Jun 12, 16:05 UTCJun 12, 17:20 UTC1h 15m
2026-06-12 SKW5890 ORD → MYR Jun 12, 13:20 UTCJun 12, 14:01 UTC40m
2026-06-11 SKW6084 ORD → TUS Jun 11, 23:25 UTCJun 12, 00:25 UTC1h 0m
2026-06-11 SKW5752 BFL → DEN Jun 11, 21:10 UTCJun 11, 22:20 UTC1h 10m
2026-06-11 SKW5103 ORD → JLN Jun 11, 10:05 UTCJun 11, 11:20 UTC1h 15m
2026-06-10 SKW5055 DEN → GCC Jun 10, 22:45 UTCJun 11, 00:10 UTC1h 25m
2026-06-10 SKW507F PAH → IAH Jun 10, 19:30 UTCJun 10, 20:55 UTC1h 25m
2026-06-10 SKW507F PAH → IAH Jun 10, 19:26 UTCJun 10, 20:46 UTC1h 20m
2026-06-10 SKW731W ORD → MCW Jun 10, 17:10 UTCJun 10, 18:00 UTC50m
2026-06-10 SKW5572 CVG → ORD Jun 10, 15:18 UTCJun 10, 16:05 UTC47m
2026-06-10 SKW5572 CVG → ORD Jun 10, 15:15 UTCJun 10, 16:10 UTC55m
2026-06-10 SKW5958 DTW → ORD Jun 10, 13:30 UTCJun 10, 14:15 UTC45m
2026-06-10 SKW5238 ORD → BNA Jun 10, 11:20 UTCJun 10, 12:25 UTC1h 5m
2026-06-10 SKW5982 SBA → SFO Jun 10, 04:15 UTCJun 10, 05:10 UTC55m
2026-06-10 SKW5234 MLI → ORD Jun 10, 00:00 UTCJun 10, 01:20 UTC1h 20m
2026-06-09 SKW5228 OMA → SFO Jun 9, 22:20 UTCJun 9, 23:15 UTC55m
2026-06-09 SKW5352 ORD → LGA Jun 9, 19:45 UTCJun 9, 20:05 UTC20m
2026-06-09 SKW5352 ORD → LGA Jun 9, 19:30 UTCJun 9, 20:04 UTC34m
2026-06-09 SKW5500 SMF → SFO Jun 9, 11:05 UTCJun 9, 12:40 UTC1h 35m
2026-06-08 SKW5225 XWA → DEN Jun 8, 23:55 UTCJun 9, 01:25 UTC1h 30m
2026-06-08 SKW5609 SLC → SFO Jun 8, 18:20 UTCJun 8, 20:10 UTC1h 50m
2026-06-08 SKW499U ACV → SFO Jun 8, 16:20 UTCJun 8, 17:05 UTC45m
2026-06-08 SKW5469 DEN → PSP Jun 8, 00:40 UTCJun 8, 02:05 UTC1h 25m
2026-06-07 SKW5752 BFL → DEN Jun 7, 19:50 UTCJun 7, 21:00 UTC1h 10m
2026-06-07 SKW5752 BFL → DEN Jun 7, 19:37 UTCJun 7, 20:58 UTC1h 21m
2026-06-07 SKW5977 ASE → SFO Jun 7, 14:50 UTCJun 7, 16:30 UTC1h 40m
2026-06-07 SKW5532 SFO → ABQ Jun 7, 12:05 UTCJun 7, 13:25 UTC1h 20m
2026-06-07 SKW5869 SFO → PSP Jun 7, 03:25 UTCJun 7, 04:15 UTC50m
2026-06-07 SKW5199 PSP → SFO Jun 7, 01:55 UTCJun 7, 02:45 UTC50m
2026-06-06 SKW4804 DTW → ORD Jun 6, 18:29 UTCJun 6, 20:30 UTC2h 0m

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 26d 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 SKW5977, SKW5820, SKW5654, SKW5532, SKW5869.