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sensors Mode-S transponder

AC04C5

ICAO 24-bit transponder address · allocated to United States

Currently assigned to N87367 · EMBRAER ERJ-170-200 (long wing) · operated by UNITED AIRLINES INC

Hex
AC04C5
Octal
53002305
Decimal
11,273,413
Country
US
Tail
N87367
Type
E75L
No current signal · last broadcast Jul 26, 21:15 UTC
Flights observed
694
Distinct callsigns
20
Country
US
Last broadcast
Jul 26, 21:15 UTC

Last known position

Most recent position reported by Mode-S AC04C5.

Country allocation

The ICAO 24-bit address AC04C5 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
SKW5507 SkyWest Airlines 13 2026-07-21
SKW5599 SkyWest Airlines 9 2026-07-21
SKW5384 - 8 2026-07-20
SKW5426 - 7 2026-07-24
SKW5363 SkyWest Airlines 7 2026-07-25
SKW4730 - 7 2026-07-25
SKW4643 - 7 2026-07-20
SKW5655 SkyWest Airlines 6 2026-07-23
SKW5523 - 6 2026-07-12
SKW5482 SkyWest Airlines 6 2026-07-24
SKW5241 - 6 2026-07-20
SKW4653 - 6 2026-07-18
SKW5968 SkyWest Airlines 5 2026-05-27
SKW5789 SkyWest Airlines 5 2026-05-11
SKW5607 SkyWest Airlines 5 2026-05-17
SKW5459 SkyWest Airlines 5 2026-07-26
SKW5438 - 5 2026-07-12
SKW5423 SkyWest Airlines 5 2026-06-30
SKW5394 SkyWest Airlines 5 2026-06-13
SKW5307 SkyWest Airlines 5 2026-07-23

Recent flights last 50

DateFlightRouteTakeoffLandingDuration
2026-07-26 SKW5292 ORD → MTY Jul 26, 21:05 UTCJul 26, 21:15 UTC10m
2026-07-26 SKW5299 SFO → FAT Jul 26, 19:25 UTCJul 26, 20:00 UTC35m
2026-07-26 SKW5897 SBP → LAX Jul 26, 17:31 UTCJul 26, 18:21 UTC50m
2026-07-26 SKW5863 SNA → SFO Jul 26, 06:00 UTCJul 26, 06:25 UTC25m
2026-07-26 SKW6015 OKC → ORD Jul 26, 03:10 UTCJul 26, 04:30 UTC1h 20m
2026-07-26 SKW5459 TYS → DEN Jul 26, 00:10 UTCJul 26, 01:20 UTC1h 10m
2026-07-25 SKW5860 SFO → MCI Jul 25, 16:30 UTCJul 25, 22:25 UTC5h 55m
2026-07-25 SKW4730 BOI → LAX Jul 25, 13:10 UTCJul 25, 15:15 UTC2h 5m
2026-07-25 SKW5363 SYR → ORD Jul 25, 03:20 UTCJul 25, 03:35 UTC15m
2026-07-25 SKW5363 SYR → ORD Jul 25, 02:10 UTCJul 25, 02:50 UTC40m
2026-07-24 SKW5489 ASE → SFO Jul 24, 21:45 UTCJul 25, 00:40 UTC2h 55m
2026-07-24 SKW5426 - Jul 24, 17:25 UTCJul 24, 20:30 UTC3h 5m
2026-07-24 SKW5482 ORD → PIT Jul 24, 14:05 UTCJul 24, 15:55 UTC1h 50m
2026-07-24 SKW5662 SFO → BIH Jul 24, 04:30 UTCJul 24, 06:05 UTC1h 35m
2026-07-24 SKW5908 SFO → MCI Jul 24, 01:50 UTCJul 24, 03:00 UTC1h 10m
2026-07-24 SKW5908 SFO → MCI Jul 24, 01:52 UTCJul 24, 02:51 UTC59m
2026-07-23 SKW380W LAX → RNO Jul 23, 23:25 UTCJul 24, 00:20 UTC55m
2026-07-23 SKW5307 ASE → SFO Jul 23, 21:20 UTCJul 23, 22:00 UTC40m
2026-07-23 SKW5655 BUR → SFO Jul 23, 18:05 UTCJul 23, 19:55 UTC1h 50m
2026-07-23 SKW4640 HSV → DEN Jul 23, 13:25 UTCJul 23, 15:45 UTC2h 20m
2026-07-23 SKW5356 FAT → SFO Jul 23, 05:25 UTCJul 23, 07:55 UTC2h 30m
2026-07-23 SKW5292 ORD → MTY Jul 23, 01:10 UTCJul 23, 01:40 UTC30m
2026-07-22 SKW5292 ORD → MTY Jul 22, 19:45 UTCJul 22, 22:45 UTC3h 0m
2026-07-22 SKW5292 ORD → MTY Jul 22, 19:39 UTCJul 23, 01:36 UTC5h 57m
2026-07-22 SKW5299 SFO → FAT Jul 22, 18:05 UTCJul 22, 18:35 UTC30m
2026-07-22 SKW5299 SFO → FAT Jul 22, 17:55 UTCJul 22, 18:40 UTC45m
2026-07-22 SKW4741 DEN → AUS Jul 22, 13:35 UTCJul 22, 15:50 UTC2h 15m
2026-07-22 SKW4741 DEN → AUS Jul 22, 13:43 UTCJul 22, 15:42 UTC1h 59m
2026-07-22 SKW5370 ORD → CVG Jul 22, 03:35 UTCJul 22, 05:15 UTC1h 40m
2026-07-22 SKW5647 SBA → LAX Jul 22, 01:25 UTCJul 22, 01:55 UTC30m
2026-07-21 SKW5862 FAR → DEN Jul 21, 23:48 UTCJul 22, 00:28 UTC40m
2026-07-21 SKW5862 FAR → DEN Jul 21, 23:40 UTCJul 22, 00:30 UTC50m
2026-07-21 SKW5599 MKE → IAH Jul 21, 21:40 UTCJul 21, 22:50 UTC1h 10m
2026-07-21 SKW5507 GSO → DEN Jul 21, 18:10 UTCJul 21, 20:05 UTC1h 55m
2026-07-21 SKW4710 - Jul 21, 15:00 UTCJul 21, 16:05 UTC1h 5m
2026-07-21 SKW4665 DEN → BIS Jul 21, 01:36 UTCJul 21, 02:53 UTC1h 17m
2026-07-21 SKW4665 - Jul 21, 01:40 UTCJul 21, 02:30 UTC50m
2026-07-20 SKW4713 OAR → DEN Jul 20, 22:05 UTCJul 21, 00:25 UTC2h 20m
2026-07-20 SKW5241 - Jul 20, 20:15 UTCJul 20, 20:55 UTC40m
2026-07-20 SKW5384 - Jul 20, 18:45 UTCJul 20, 19:10 UTC25m
2026-07-20 SKW5384 SAN → LAX Jul 20, 18:24 UTCJul 20, 19:04 UTC40m
2026-07-20 SKW4643 - Jul 20, 16:50 UTCJul 20, 17:15 UTC25m
2026-07-20 SKW4643 LAX → SAN Jul 20, 16:20 UTCJul 20, 17:16 UTC56m
2026-07-20 SKW4642 - Jul 20, 11:25 UTCJul 20, 14:10 UTC2h 45m
2026-07-20 SKW418W LAX → AUS Jul 20, 01:55 UTCJul 20, 04:40 UTC2h 45m
2026-07-19 SKW5718 - Jul 19, 23:05 UTCJul 20, 00:00 UTC55m
2026-07-19 SKW5548 LAX → PHX Jul 19, 20:15 UTCJul 19, 21:25 UTC1h 10m
2026-07-19 SKW5548 LAX → PHX Jul 19, 20:24 UTCJul 19, 21:20 UTC56m
2026-07-19 SKW5384 - Jul 19, 18:10 UTCJul 19, 18:35 UTC25m
2026-07-19 SKW4643 - Jul 19, 16:35 UTCJul 19, 17:10 UTC35m

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 N87367 page for operator, model, and routing details .

Mode-S AC04C5 frequently asked

What is Mode-S code AC04C5?
AC04C5 is an ICAO 24-bit transponder address. Allocated to United States. Assigned to N87367.
Where is Mode-S AC04C5 registered?
Mode-S code AC04C5 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 AC04C5 broadcasting right now?
No active broadcast right now. Last signal was Jul 26, 21:15 UTC.
Hex, octal, and decimal Mode-S codes: what's the difference?
The same 24-bit identifier expressed in different bases: hex AC04C5, octal 53002305, decimal 11,273,413.
What flights does AC04C5 operate?
Mode-S AC04C5 has broadcast 20 distinct callsigns, including SKW5507, SKW5599, SKW5384, SKW5426, SKW5363.