Apparatus

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sensors Mode-S transponder

A7FF72

ICAO 24-bit transponder address · allocated to United States

Currently assigned to N614UX · EMBRAER ERJ-170-200 (long wing) · operated by UNITED AIRLINES INC

Hex
A7FF72
Octal
51777562
Decimal
11,009,906
Country
US
Tail
N614UX
Type
E75L
No current signal · last broadcast Jul 26, 22:30 UTC
Flights observed
678
Distinct callsigns
20
Country
US
Last broadcast
Jul 26, 22:30 UTC

Last known position

Most recent position reported by Mode-S A7FF72.

Country allocation

The ICAO 24-bit address A7FF72 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
SKW5457 - 15 2026-07-07
SKW5753 - 9 2026-07-07
SKW5363 - 9 2026-07-12
SKW5241 SkyWest Airlines 9 2026-07-25
SKW4722 - 8 2026-07-08
SKW4701 SkyWest Airlines 8 2026-07-26
SKW5899 - 7 2026-07-12
SKW5897 - 7 2026-06-22
SKW5599 SkyWest Airlines 7 2026-05-03
SKW5578 - 7 2026-07-18
SKW5519 - 7 2026-06-25
SKW5515 - 7 2026-07-13
SKW5426 SkyWest Airlines 7 2026-06-05
SKW5307 - 7 2026-07-07
SKW4713 SkyWest Airlines 7 2026-07-25
SKW5863 - 6 2026-06-22
SKW5728 - 6 2026-07-01
SKW5542 - 6 2026-07-08
SKW5510 - 6 2026-07-13
SKW5508 - 6 2026-06-25

Recent flights last 50

DateFlightRouteTakeoffLandingDuration
2026-07-26 SKW5452 RDD → SFO Jul 26, 21:30 UTCJul 26, 22:15 UTC45m
2026-07-26 SKW4701 DEN → MOT Jul 26, 18:05 UTCJul 26, 20:25 UTC2h 20m
2026-07-26 SKW4701 DEN → MOT Jul 26, 18:07 UTCJul 26, 20:23 UTC2h 16m
2026-07-26 SKW4710 CID → ORD Jul 26, 15:05 UTCJul 26, 16:10 UTC1h 5m
2026-07-26 SKW4710 CID → ORD Jul 26, 14:53 UTCJul 26, 16:10 UTC1h 17m
2026-07-26 SKW4665 BOI → LAX Jul 26, 00:00 UTCJul 26, 00:40 UTC40m
2026-07-25 SKW4665 BOI → LAX Jul 25, 23:56 UTCJul 26, 01:15 UTC1h 19m
2026-07-25 SKW4713 DTW → ORD Jul 25, 19:45 UTCJul 25, 22:10 UTC2h 25m
2026-07-25 SKW5241 HSV → ORD Jul 25, 17:50 UTCJul 25, 18:35 UTC45m
2026-07-25 SKW5241 HSV → ORD Jul 25, 17:46 UTCJul 25, 18:32 UTC46m
2026-07-25 SKW5482 ORD → PIT Jul 25, 14:10 UTCJul 25, 16:10 UTC2h 0m
2026-07-25 SKW5482 ORD → PIT Jul 25, 14:22 UTCJul 25, 16:07 UTC1h 45m
2026-07-25 SKW5662 SFO → BIH Jul 25, 04:40 UTCJul 25, 06:20 UTC1h 40m
2026-07-25 SKW5662 SFO → BIH Jul 25, 04:41 UTCJul 25, 06:21 UTC1h 40m
2026-07-25 SKW5908 SFO → MCI Jul 25, 01:45 UTCJul 25, 03:00 UTC1h 15m
2026-07-24 SKW380W LAX → RNO Jul 24, 23:30 UTCJul 25, 00:30 UTC1h 0m
2026-07-24 SKW6081 ORD → TYS Jul 24, 15:30 UTCJul 24, 19:25 UTC3h 55m
2026-07-24 SKW6081 ORD → TYS Jul 24, 15:34 UTCJul 24, 19:06 UTC3h 32m
2026-07-24 SKW5491 SGF → ORD Jul 24, 12:25 UTCJul 24, 13:54 UTC1h 29m
2026-07-24 SKW5491 SGF → ORD Jul 24, 12:15 UTCJul 24, 13:55 UTC1h 40m
2026-07-24 SKW5645 JAC → SFO Jul 24, 01:38 UTCJul 24, 02:57 UTC1h 19m
2026-07-24 SKW5645 JAC → SFO Jul 24, 01:10 UTCJul 24, 01:20 UTC10m
2026-07-23 SKW5524 SFO → ONT Jul 23, 22:10 UTCJul 23, 23:45 UTC1h 35m
2026-07-23 SKW5524 SFO → ONT Jul 23, 22:08 UTCJul 23, 23:35 UTC1h 27m
2026-07-23 SKW5403 LGA → ORD Jul 23, 19:25 UTCJul 23, 20:55 UTC1h 30m
2026-07-23 SKW4656 PWM → ORD Jul 23, 15:15 UTCJul 23, 16:45 UTC1h 30m
2026-07-23 SKW5601 - Jul 23, 12:45 UTCJul 23, 14:10 UTC1h 25m
2026-07-23 SKW5601 ORD → AVL Jul 23, 12:25 UTCJul 23, 13:59 UTC1h 34m
2026-07-22 SKW4749 - Jul 22, 23:50 UTCJul 23, 00:00 UTC10m
2026-07-22 SKW4749 - Jul 22, 23:00 UTCJul 23, 00:00 UTC1h 0m
2026-07-22 SKW4749 DAY → ORD Jul 22, 22:57 UTCJul 22, 23:35 UTC38m
2026-07-22 SKW418R DEN → MSN Jul 22, 20:40 UTCJul 22, 21:25 UTC45m
2026-07-22 SKW4656 PWM → ORD Jul 22, 14:55 UTCJul 22, 16:25 UTC1h 30m
2026-07-22 SKW4656 PWM → ORD Jul 22, 14:57 UTCJul 22, 16:15 UTC1h 18m
2026-07-22 SKW5601 - Jul 22, 12:15 UTCJul 22, 13:35 UTC1h 20m
2026-07-21 SKW5621 OKC → ORD Jul 21, 17:50 UTCJul 21, 19:45 UTC1h 55m
2026-07-21 SKW5621 OKC → ORD Jul 21, 17:54 UTCJul 21, 19:24 UTC1h 30m
2026-07-21 SKW5614 OKC → IAH Jul 21, 14:30 UTCJul 21, 16:10 UTC1h 40m
2026-07-20 SKW5405 - Jul 20, 23:40 UTCJul 21, 00:50 UTC1h 10m
2026-07-20 SKW5654 SUN → ORD Jul 20, 19:15 UTCJul 20, 21:15 UTC2h 0m
2026-07-20 SKW5473 SNA → SFO Jul 20, 16:20 UTCJul 20, 18:05 UTC1h 45m
2026-07-20 SKW4803 BUR → SFO Jul 20, 13:20 UTCJul 20, 13:45 UTC25m
2026-07-20 SKW4785 IAH → LGA Jul 20, 03:00 UTCJul 20, 04:50 UTC1h 50m
2026-07-20 SKW4785 IAH → LGA Jul 20, 02:58 UTCJul 20, 04:50 UTC1h 52m
2026-07-20 SKW4652 - Jul 20, 00:05 UTCJul 20, 01:10 UTC1h 5m
2026-07-20 SKW4652 ABQ → DEN Jul 20, 00:10 UTCJul 20, 01:01 UTC51m
2026-07-19 SKW4760 DEN → ABQ Jul 19, 22:05 UTCJul 19, 23:00 UTC55m
2026-07-19 SKW4720 MSN → ORD Jul 19, 19:35 UTCJul 19, 20:40 UTC1h 5m
2026-07-19 SKW5605 MRY → SFO Jul 19, 16:45 UTCJul 19, 18:10 UTC1h 25m
2026-07-19 SKW6052 ORD → IND Jul 19, 14:00 UTCJul 19, 15:05 UTC1h 5m

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 N614UX page for operator, model, and routing details .

Mode-S A7FF72 frequently asked

What is Mode-S code A7FF72?
A7FF72 is an ICAO 24-bit transponder address. Allocated to United States. Assigned to N614UX.
Where is Mode-S A7FF72 registered?
Mode-S code A7FF72 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 A7FF72 broadcasting right now?
No active broadcast right now. Last signal was Jul 26, 22:30 UTC.
Hex, octal, and decimal Mode-S codes: what's the difference?
The same 24-bit identifier expressed in different bases: hex A7FF72, octal 51777562, decimal 11,009,906.
What flights does A7FF72 operate?
Mode-S A7FF72 has broadcast 20 distinct callsigns, including SKW5457, SKW5753, SKW5363, SKW5241, SKW4722.