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sensors Mode-S transponder

AC04C6

ICAO 24-bit transponder address · allocated to United States

Currently assigned to N87368 · EMBRAER ERJ-170-200 (long wing) · operated by UNITED AIRLINES INC

Hex
AC04C6
Octal
53002306
Decimal
11,273,414
Country
US
Tail
N87368
Type
E75L
No current signal · last broadcast Jul 26, 19:55 UTC
Flights observed
651
Distinct callsigns
20
Country
US
Last broadcast
Jul 26, 19:55 UTC

Last known position

Most recent position reported by Mode-S AC04C6.

Country allocation

The ICAO 24-bit address AC04C6 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
SKW5968 - 8 2026-07-08
SKW717C - 7 2026-07-16
SKW5644 - 7 2026-07-14
SKW5268 - 7 2026-07-16
SKW4759 SkyWest Airlines 7 2026-07-26
SKW5655 SkyWest Airlines 6 2026-05-27
SKW5524 - 6 2026-06-18
SKW5438 - 6 2026-07-17
SKW5363 - 6 2026-06-27
SKW5295 SkyWest Airlines 6 2026-06-25
SKW4702 - 6 2026-07-11
SKW5849 - 5 2026-07-19
SKW5645 - 5 2026-07-09
SKW5599 - 5 2026-06-25
SKW5550 SkyWest Airlines 5 2026-05-27
SKW5519 - 5 2026-07-15
SKW5508 - 5 2026-07-15
SKW5507 - 5 2026-06-25
SKW5410 SkyWest Airlines 5 2026-06-21
SKW5403 - 5 2026-06-17

Recent flights last 50

DateFlightRouteTakeoffLandingDuration
2026-07-26 SKW5492 FSD → DEN Jul 26, 18:25 UTCJul 26, 19:45 UTC1h 20m
2026-07-26 SKW4759 MRY → SFO Jul 26, 16:10 UTCJul 26, 17:25 UTC1h 15m
2026-07-26 SKW5712 GEG → SFO Jul 26, 13:20 UTCJul 26, 14:35 UTC1h 15m
2026-07-26 SKW5734 ERI → ORD Jul 26, 02:10 UTCJul 26, 03:25 UTC1h 15m
2026-07-25 SKW5966 SFO → ACV Jul 25, 22:05 UTCJul 26, 00:00 UTC1h 55m
2026-07-25 SKW4708 ABQ → SFO Jul 25, 20:10 UTCJul 25, 20:40 UTC30m
2026-07-25 SKW5423 SFO → PHX Jul 25, 18:35 UTCJul 25, 19:10 UTC35m
2026-07-25 SKW5423 SFO → PHX Jul 25, 14:50 UTCJul 25, 16:35 UTC1h 45m
2026-07-25 SKW5423 SFO → PHX Jul 25, 13:58 UTCJul 25, 16:37 UTC2h 39m
2026-07-25 SKW5986 SLC → SFO Jul 25, 02:30 UTCJul 25, 03:30 UTC1h 0m
2026-07-24 SKW5417 SFO → PSP Jul 24, 23:40 UTCJul 25, 01:25 UTC1h 45m
2026-07-24 SKW5422 SFO → BFL Jul 24, 20:15 UTCJul 24, 21:30 UTC1h 15m
2026-07-24 SKW4733 ORD → DCA Jul 24, 17:35 UTCJul 24, 19:05 UTC1h 30m
2026-07-24 SKW4765 DEN → SBP Jul 24, 14:04 UTCJul 24, 15:28 UTC1h 24m
2026-07-24 SKW4765 DEN → SBP Jul 24, 13:55 UTCJul 24, 15:30 UTC1h 35m
2026-07-24 SKW5969 SFO → SEA Jul 24, 11:05 UTCJul 24, 12:40 UTC1h 35m
2026-07-24 SKW5269 DEN → SJC Jul 24, 03:10 UTCJul 24, 04:30 UTC1h 20m
2026-07-24 SKW4652 AVL → ORD Jul 24, 00:30 UTCJul 24, 01:25 UTC55m
2026-07-24 SKW4652 AVL → ORD Jul 24, 00:22 UTCJul 24, 01:21 UTC59m
2026-07-23 SKW4760 DEN → ATW Jul 23, 22:40 UTCJul 23, 23:30 UTC50m
2026-07-23 SKW4720 MSN → ORD Jul 23, 19:30 UTCJul 23, 20:30 UTC1h 0m
2026-07-23 SKW5605 MRY → SFO Jul 23, 16:20 UTCJul 23, 17:40 UTC1h 20m
2026-07-23 SKW5676 SFO → GEG Jul 23, 12:33 UTCJul 23, 14:21 UTC1h 48m
2026-07-23 SKW5676 SFO → GEG Jul 23, 12:25 UTCJul 23, 14:30 UTC2h 5m
2026-07-23 SKW5579 RDD → LAX Jul 23, 06:25 UTCJul 23, 07:55 UTC1h 30m
2026-07-23 SKW4662 ABE → ORD Jul 23, 03:15 UTCJul 23, 04:40 UTC1h 25m
2026-07-23 SKW5604 ABQ → SFO Jul 23, 00:10 UTCJul 23, 01:15 UTC1h 5m
2026-07-23 SKW5604 ABQ → SFO Jul 23, 00:08 UTCJul 23, 01:07 UTC59m
2026-07-22 SKW5452 RDD → SFO Jul 22, 21:29 UTCJul 22, 22:17 UTC48m
2026-07-22 SKW5452 - Jul 22, 21:35 UTCJul 22, 22:15 UTC40m
2026-07-22 SKW4701 DEN → MOT Jul 22, 18:10 UTCJul 22, 20:20 UTC2h 10m
2026-07-22 SKW5561 SHV → DEN Jul 22, 13:50 UTCJul 22, 15:40 UTC1h 50m
2026-07-22 SKW5561 SHV → DEN Jul 22, 13:54 UTCJul 22, 15:32 UTC1h 38m
2026-07-21 SKW5396 BUR → SFO Jul 21, 23:20 UTCJul 21, 23:55 UTC35m
2026-07-21 SKW5637 ORD → MDT Jul 21, 18:55 UTCJul 21, 20:05 UTC1h 10m
2026-07-21 SKW5315 ASE → ORD Jul 21, 16:25 UTCJul 21, 17:40 UTC1h 15m
2026-07-21 SKW5818 CPR → DEN Jul 21, 13:15 UTCJul 21, 14:00 UTC45m
2026-07-21 SKW5818 CPR → DEN Jul 21, 13:26 UTCJul 21, 13:57 UTC31m
2026-07-21 SKW5226 DEN → CPR Jul 21, 03:10 UTCJul 21, 03:45 UTC35m
2026-07-21 SKW4758 SFO → SNA Jul 21, 00:15 UTCJul 21, 01:30 UTC1h 15m
2026-07-20 SKW5498 - Jul 20, 21:50 UTCJul 20, 22:55 UTC1h 5m
2026-07-20 SKW5541 - Jul 20, 18:45 UTCJul 20, 20:20 UTC1h 35m
2026-07-20 SKW5541 SGF → DEN Jul 20, 18:48 UTCJul 20, 20:18 UTC1h 30m
2026-07-20 SKW5481 SMF → SFO Jul 20, 16:15 UTCJul 20, 17:40 UTC1h 25m
2026-07-20 SKW5712 - Jul 20, 13:25 UTCJul 20, 14:35 UTC1h 10m
2026-07-20 SKW5734 - Jul 20, 01:45 UTCJul 20, 03:00 UTC1h 15m
2026-07-20 SKW5734 DEN → SUN Jul 20, 01:44 UTCJul 20, 03:09 UTC1h 25m
2026-07-19 SKW4713 - Jul 19, 22:00 UTCJul 20, 00:10 UTC2h 10m
2026-07-19 SKW4713 MRY → DEN Jul 19, 22:00 UTCJul 20, 00:08 UTC2h 8m
2026-07-19 SKW5241 - Jul 19, 20:15 UTCJul 19, 20:50 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 N87368 page for operator, model, and routing details .

Mode-S AC04C6 frequently asked

What is Mode-S code AC04C6?
AC04C6 is an ICAO 24-bit transponder address. Allocated to United States. Assigned to N87368.
Where is Mode-S AC04C6 registered?
Mode-S code AC04C6 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 AC04C6 broadcasting right now?
No active broadcast right now. Last signal was Jul 26, 19:55 UTC.
Hex, octal, and decimal Mode-S codes: what's the difference?
The same 24-bit identifier expressed in different bases: hex AC04C6, octal 53002306, decimal 11,273,414.
What flights does AC04C6 operate?
Mode-S AC04C6 has broadcast 20 distinct callsigns, including SKW5968, SKW717C, SKW5644, SKW5268, SKW4759.