Apparatus

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sensors Mode-S transponder

A9BB70

ICAO 24-bit transponder address · allocated to United States

Currently assigned to N726SK · BOMBARDIER Regional Jet CRJ-700 · operated by SKYWEST AIRLINES INC

Hex
A9BB70
Octal
52335560
Decimal
11,123,568
Country
US
Tail
N726SK
Type
CRJ7
No current signal · last broadcast 1h ago
Flights observed
648
Distinct callsigns
20
Country
US
Last broadcast
1h ago

Last known position

Most recent position reported by Mode-S A9BB70.

Country allocation

The ICAO 24-bit address A9BB70 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
SKW6419 SkyWest Airlines 10 2026-06-25
SKW6299 SkyWest Airlines 10 2026-06-12
SKW6446 SkyWest Airlines 9 2026-06-29
SKW6444 SkyWest Airlines 8 2026-05-19
SKW6442 SkyWest Airlines 8 2026-06-14
SKW6408 - 8 2026-06-30
SKW6384 SkyWest Airlines 8 2026-04-25
SKW6363 - 8 2026-06-21
SKW6304 SkyWest Airlines 8 2026-05-13
SKW6267 - 8 2026-06-29
SKW4886 - 8 2026-06-24
SKW6420 SkyWest Airlines 7 2026-05-15
SKW6385 - 7 2026-06-28
SKW6245 - 7 2026-06-26
SKW6223 SkyWest Airlines 7 2026-05-16
SKW6450 SkyWest Airlines 6 2026-05-25
SKW6440 SkyWest Airlines 6 2026-07-01
SKW6413 SkyWest Airlines 6 2026-06-24
SKW6407 - 6 2026-06-25
SKW6405 SkyWest Airlines 6 2026-06-02

Recent flights last 50

DateFlightRouteTakeoffLandingDuration
2026-07-14 SKW6493 - Jul 14, 13:25 UTCJul 14, 14:00 UTC35m
2026-07-13 SKW6487 - Jul 13, 23:50 UTCJul 14, 01:25 UTC1h 35m
2026-07-13 SKW6519 OKC → ORD Jul 13, 18:50 UTCJul 13, 20:40 UTC1h 50m
2026-07-13 SKW6519 OKC → ORD Jul 13, 18:52 UTCJul 13, 20:23 UTC1h 31m
2026-07-13 SKW6277 - Jul 13, 16:10 UTCJul 13, 18:00 UTC1h 50m
2026-07-13 SKW6277 PHX → OKC Jul 13, 16:00 UTCJul 13, 17:57 UTC1h 57m
2026-07-13 SKW6505 - Jul 13, 13:50 UTCJul 13, 14:20 UTC30m
2026-07-13 SKW6509 - Jul 13, 04:05 UTCJul 13, 04:35 UTC30m
2026-07-13 SKW6298 - Jul 13, 01:20 UTCJul 13, 02:20 UTC1h 0m
2026-07-13 SKW6298 SAF → PHX Jul 13, 01:18 UTCJul 13, 02:16 UTC58m
2026-07-12 SKW6513 - Jul 12, 22:25 UTCJul 13, 00:01 UTC1h 35m
2026-07-12 SKW6513 LAX → SAF Jul 12, 22:16 UTCJul 13, 00:10 UTC1h 54m
2026-07-12 SKW6376 - Jul 12, 19:50 UTCJul 12, 21:00 UTC1h 10m
2026-07-12 SKW6376 - Jul 12, 17:45 UTCJul 12, 19:01 UTC1h 15m
2026-07-12 SKW4896 - Jul 12, 14:25 UTCJul 12, 16:45 UTC2h 20m
2026-07-12 SKW4920 - Jul 12, 03:30 UTCJul 12, 05:30 UTC2h 0m
2026-07-12 SKW4920 LAX → SEA Jul 12, 03:29 UTCJul 12, 05:26 UTC1h 57m
2026-07-10 SKW5011 - Jul 10, 22:20 UTCJul 10, 23:05 UTC45m
2026-07-10 SKW4910 - Jul 10, 15:50 UTCJul 10, 17:10 UTC1h 20m
2026-07-10 SKW4905 - Jul 10, 01:35 UTCJul 10, 03:00 UTC1h 25m
2026-07-10 SKW4905 LAX → ELP Jul 10, 01:33 UTCJul 10, 03:14 UTC1h 41m
2026-07-09 SKW6324 - Jul 9, 21:40 UTCJul 9, 23:50 UTC2h 10m
2026-07-09 SKW6324 SEA → LAX Jul 9, 21:38 UTCJul 9, 23:49 UTC2h 11m
2026-07-09 SKW6324 - Jul 9, 18:05 UTCJul 9, 20:15 UTC2h 10m
2026-07-09 SKW4896 ASE → ORD Jul 9, 14:15 UTCJul 9, 16:20 UTC2h 5m
2026-07-09 SKW4896 ASE → ORD Jul 9, 14:11 UTCJul 9, 16:15 UTC2h 4m
2026-07-09 SKW4920 - Jul 9, 04:25 UTCJul 9, 06:35 UTC2h 10m
2026-07-09 SKW6387 - Jul 9, 01:35 UTCJul 9, 03:20 UTC1h 45m
2026-07-08 SKW6387 - Jul 8, 22:40 UTCJul 9, 00:00 UTC1h 20m
2026-07-08 SKW9911 - Jul 8, 20:30 UTCJul 8, 21:30 UTC1h 0m
2026-07-07 SKW6505 - Jul 7, 14:25 UTCJul 7, 14:50 UTC25m
2026-07-07 SKW6509 - Jul 7, 02:35 UTCJul 7, 02:55 UTC20m
2026-07-07 SKW6509 PHX → YUM Jul 7, 02:31 UTCJul 7, 03:02 UTC31m
2026-07-06 SKW6459 - Jul 6, 23:35 UTCJul 7, 01:10 UTC1h 35m
2026-07-06 SKW6459 STS → PHX Jul 6, 23:20 UTCJul 7, 01:09 UTC1h 49m
2026-07-06 SKW6459 - Jul 6, 20:55 UTCJul 6, 22:45 UTC1h 50m
2026-07-06 SKW6383 ORD → OKC Jul 6, 18:55 UTCJul 6, 19:30 UTC35m
2026-07-06 SKW6383 ORD → OKC Jul 6, 17:30 UTCJul 6, 17:50 UTC20m
2026-07-06 SKW6392 OKC → PHX Jul 6, 14:15 UTCJul 6, 16:10 UTC1h 55m
2026-07-06 SKW6206 DFW → OKC Jul 6, 12:40 UTCJul 6, 13:25 UTC45m
2026-07-05 SKW5010 - Jul 5, 23:55 UTCJul 6, 02:15 UTC2h 20m
2026-07-05 SKW5010 IDA → DFW Jul 5, 23:43 UTCJul 6, 02:15 UTC2h 32m
2026-07-05 SKW6417 - Jul 5, 16:30 UTCJul 5, 18:35 UTC2h 5m
2026-07-05 SKW6417 ORD → IDA Jul 5, 16:21 UTCJul 5, 19:02 UTC2h 41m
2026-07-05 SKW4974 - Jul 5, 12:55 UTCJul 5, 13:55 UTC1h 0m
2026-07-05 SKW4972 ORD → DAY Jul 5, 05:10 UTCJul 5, 06:00 UTC50m
2026-07-05 SKW4972 ORD → DAY Jul 5, 05:09 UTCJul 5, 06:00 UTC51m
2026-07-05 SKW5004 - Jul 5, 01:25 UTCJul 5, 03:20 UTC1h 55m
2026-07-03 SKW5004 ORD → SPI Jul 3, 14:55 UTCJul 3, 16:30 UTC1h 35m
2026-07-03 SKW6216 GUC → DFW Jul 3, 11:30 UTCJul 3, 12:50 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 N726SK page for operator, model, and routing details .

Mode-S A9BB70 frequently asked

What is Mode-S code A9BB70?
A9BB70 is an ICAO 24-bit transponder address. Allocated to United States. Assigned to N726SK.
Where is Mode-S A9BB70 registered?
Mode-S code A9BB70 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 A9BB70 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 A9BB70, octal 52335560, decimal 11,123,568.
What flights does A9BB70 operate?
Mode-S A9BB70 has broadcast 20 distinct callsigns, including SKW6419, SKW6299, SKW6446, SKW6444, SKW6442.