Apparatus

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sensors Mode-S transponder

AABD56

ICAO 24-bit transponder address · allocated to United States

Currently assigned to N791SK · BOMBARDIER Regional Jet CRJ-700 · operated by SKYWEST AIRLINES INC

Hex
AABD56
Octal
52536526
Decimal
11,189,590
Country
US
Tail
N791SK
Type
CRJ7
No current signal · last broadcast Jul 26, 20:25 UTC
Flights observed
572
Distinct callsigns
20
Country
US
Last broadcast
Jul 26, 20:25 UTC

Last known position

Most recent position reported by Mode-S AABD56.

Country allocation

The ICAO 24-bit address AABD56 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
SKW5824 SkyWest Airlines 13 2026-07-26
SKW5551 SkyWest Airlines 8 2026-07-25
SKW5055 - 8 2026-07-06
SKW5964 - 7 2026-07-16
SKW5950 SkyWest Airlines 7 2026-07-21
SKW5666 SkyWest Airlines 7 2026-07-21
SKW5977 - 6 2026-07-01
SKW5866 SkyWest Airlines 6 2026-07-26
SKW5606 - 6 2026-07-04
SKW4684 SkyWest Airlines 6 2026-07-23
SKW5869 - 5 2026-06-30
SKW5699 SkyWest Airlines 5 2026-05-16
SKW5685 - 5 2026-07-21
SKW5610 SkyWest Airlines 5 2026-05-15
SKW5530 SkyWest Airlines 5 2026-05-08
SKW5310 - 5 2026-07-13
SKW5239 - 5 2026-07-16
SKW4745 - 5 2026-06-23
SKW4704 - 5 2026-06-24
SKW731W SkyWest Airlines 4 2026-06-17

Recent flights last 50

DateFlightRouteTakeoffLandingDuration
2026-07-26 SKW6031 DEN → SAF Jul 26, 19:45 UTCJul 26, 20:25 UTC40m
2026-07-26 SKW5490 BHM → ORD Jul 26, 17:15 UTCJul 26, 18:30 UTC1h 15m
2026-07-26 SKW6029 SAT → SFO Jul 26, 14:30 UTCJul 26, 15:45 UTC1h 15m
2026-07-26 SKW5866 LNK → DEN Jul 26, 11:35 UTCJul 26, 12:45 UTC1h 10m
2026-07-26 SKW5824 ORD → FNT Jul 26, 02:45 UTCJul 26, 03:40 UTC55m
2026-07-25 SKW6063 MCW → ORD Jul 25, 20:22 UTCJul 25, 21:11 UTC49m
2026-07-25 SKW6062 LAR → DEN Jul 25, 17:55 UTCJul 25, 18:55 UTC1h 0m
2026-07-25 SKW5348 FAR → ORD Jul 25, 15:10 UTCJul 25, 16:15 UTC1h 5m
2026-07-25 SKW5824 ORD → FNT Jul 25, 02:55 UTCJul 25, 03:55 UTC1h 0m
2026-07-25 SKW5824 ORD → FNT Jul 25, 02:56 UTCJul 25, 03:51 UTC55m
2026-07-25 SKW5551 SBP → DEN Jul 25, 00:15 UTCJul 25, 01:15 UTC1h 0m
2026-07-25 SKW5551 SBP → DEN Jul 25, 00:14 UTCJul 25, 01:14 UTC1h 0m
2026-07-24 SKW375Z LAX → SBP Jul 24, 21:55 UTCJul 24, 22:50 UTC55m
2026-07-24 SKW5682 SFO → OMA Jul 24, 20:00 UTCJul 24, 20:45 UTC45m
2026-07-24 SKW5682 SFO → OMA Jul 24, 19:53 UTCJul 24, 20:44 UTC51m
2026-07-24 SKW4750 BDL → ORD Jul 24, 18:10 UTCJul 24, 18:40 UTC30m
2026-07-24 SKW5708 ORD → PWM Jul 24, 14:15 UTCJul 24, 17:15 UTC3h 0m
2026-07-24 SKW5866 LNK → DEN Jul 24, 11:35 UTCJul 24, 12:45 UTC1h 10m
2026-07-24 SKW5824 ORD → FNT Jul 24, 03:45 UTCJul 24, 04:40 UTC55m
2026-07-24 SKW5551 SBP → DEN Jul 24, 01:35 UTCJul 24, 02:40 UTC1h 5m
2026-07-23 SKW395Z DEN → IDA Jul 23, 22:55 UTCJul 24, 00:15 UTC1h 20m
2026-07-23 SKW5235 IAH → GDL Jul 23, 15:55 UTCJul 23, 20:00 UTC4h 5m
2026-07-23 SKW5495 ORD → MKE Jul 23, 13:30 UTCJul 23, 14:20 UTC50m
2026-07-23 SKW4684 DEN → SAF Jul 23, 05:25 UTCJul 23, 06:10 UTC45m
2026-07-23 SKW5472 ORD → CHA Jul 23, 02:30 UTCJul 23, 04:10 UTC1h 40m
2026-07-22 SKW394Y DEN → MAF Jul 22, 20:10 UTCJul 22, 21:35 UTC1h 25m
2026-07-22 SKW5319 GEG → SFO Jul 22, 16:45 UTCJul 22, 18:00 UTC1h 15m
2026-07-22 SKW5975 DEN → FSD Jul 22, 14:15 UTCJul 22, 15:30 UTC1h 15m
2026-07-22 SKW5794 AVL → ORD Jul 22, 11:15 UTCJul 22, 12:35 UTC1h 20m
2026-07-22 SKW5252 - Jul 22, 01:25 UTCJul 22, 02:40 UTC1h 15m
2026-07-21 SKW5666 MCI → SFO Jul 21, 22:30 UTCJul 21, 23:40 UTC1h 10m
2026-07-21 SKW5950 ORD → SDF Jul 21, 20:10 UTCJul 21, 21:05 UTC55m
2026-07-21 SKW5685 XWA → DEN Jul 21, 16:47 UTCJul 21, 18:12 UTC1h 25m
2026-07-21 SKW424M DEN → DEN Jul 21, 14:10 UTCJul 21, 18:20 UTC4h 10m
2026-07-21 SKW4738 SLC → ORD Jul 21, 11:40 UTCJul 21, 12:40 UTC1h 0m
2026-07-21 SKW700V DEN → DVL Jul 21, 03:05 UTCJul 21, 03:55 UTC50m
2026-07-21 SKW700V DEN → DVL Jul 21, 02:42 UTCJul 21, 04:13 UTC1h 31m
2026-07-21 SKW4799 ORD → CRW Jul 21, 00:30 UTCJul 21, 01:10 UTC40m
2026-07-20 SKW5643 ORD → TYS Jul 20, 22:30 UTCJul 20, 23:05 UTC35m
2026-07-20 SKW4663 DEN → BIS Jul 20, 16:25 UTCJul 20, 20:15 UTC3h 50m
2026-07-20 SKW5678 - Jul 20, 12:50 UTCJul 20, 14:05 UTC1h 15m
2026-07-20 SKW5366 - Jul 20, 03:10 UTCJul 20, 04:05 UTC55m
2026-07-20 SKW5906 BNA → ORD Jul 20, 00:10 UTCJul 20, 00:55 UTC45m
2026-07-19 SKW734P DEN → XWA Jul 19, 21:10 UTCJul 19, 21:35 UTC25m
2026-07-19 SKW5229 - Jul 19, 18:40 UTCJul 19, 19:45 UTC1h 5m
2026-07-19 SKW5235 DEN → MOT Jul 19, 15:57 UTCJul 19, 17:19 UTC1h 22m
2026-07-19 SKW5235 - Jul 19, 15:55 UTCJul 19, 17:00 UTC1h 5m
2026-07-19 SKW5495 ORD → MKE Jul 19, 13:15 UTCJul 19, 14:10 UTC55m
2026-07-19 SKW4684 - Jul 19, 01:35 UTCJul 19, 02:20 UTC45m
2026-07-18 SKW4807 SFO → BUR Jul 18, 19:05 UTCJul 18, 20:25 UTC1h 20m

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 N791SK page for operator, model, and routing details .

Mode-S AABD56 frequently asked

What is Mode-S code AABD56?
AABD56 is an ICAO 24-bit transponder address. Allocated to United States. Assigned to N791SK.
Where is Mode-S AABD56 registered?
Mode-S code AABD56 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 AABD56 broadcasting right now?
No active broadcast right now. Last signal was Jul 26, 20:25 UTC.
Hex, octal, and decimal Mode-S codes: what's the difference?
The same 24-bit identifier expressed in different bases: hex AABD56, octal 52536526, decimal 11,189,590.
What flights does AABD56 operate?
Mode-S AABD56 has broadcast 20 distinct callsigns, including SKW5824, SKW5551, SKW5055, SKW5964, SKW5950.