sensors Mode-S transponder

AE5AC1

ICAO 24-bit transponder address

Currently assigned to 15-20735 · SIKORSKY UH-60 Black Hawk

Hex
AE5AC1
Octal
53455301
Decimal
11,426,497
Tail
15-20735
Type
H60
No current signal · last broadcast 14h ago
Flights observed
33
Distinct callsigns
11
Country
-
Last broadcast
14h ago

Last known position

Most recent position reported by Mode-S AE5AC1.

Callsign history 11 distinct

Callsign Airline Flights Last seen
PAT22 - 6 2026-06-17
PAT23 - 5 2026-07-14
PAT26 - 4 2026-06-30
PAT16 - 4 2026-06-03
PAT04 - 3 2026-05-20
PAT30 - 2 2026-05-07
PAT28 - 2 2026-04-15
PAT27 - 2 2026-05-19
PAT20 - 2 2026-06-04
PAT19 - 2 2026-06-09
PAT03 - 1 2026-06-24

Recent flights last 33

DateFlightRouteTakeoffLandingDuration
2026-07-14 PAT23 - Jul 14, 01:20 UTCJul 14, 03:15 UTC1h 55m
2026-07-13 PAT23 - Jul 13, 22:05 UTCJul 13, 23:55 UTC1h 50m
2026-06-30 PAT26 - Jun 30, 03:05 UTCJun 30, 03:20 UTC15m
2026-06-24 PAT03 - Jun 24, 12:50 UTCJun 24, 14:45 UTC1h 55m
2026-06-17 PAT22 - Jun 17, 01:00 UTCJun 17, 02:25 UTC1h 25m
2026-06-12 PAT23 - Jun 12, 02:40 UTCJun 12, 04:20 UTC1h 40m
2026-06-09 PAT19 - Jun 9, 18:05 UTCJun 9, 19:40 UTC1h 35m
2026-06-09 PAT19 - Jun 9, 14:20 UTCJun 9, 15:45 UTC1h 25m
2026-06-04 PAT20 - Jun 4, 19:15 UTCJun 4, 20:05 UTC50m
2026-06-04 PAT20 - Jun 4, 15:05 UTCJun 4, 16:30 UTC1h 25m
2026-06-03 PAT16 - Jun 3, 18:10 UTCJun 3, 18:20 UTC10m
2026-06-03 PAT16 - Jun 3, 17:15 UTCJun 3, 17:30 UTC15m
2026-06-03 PAT16 - Jun 3, 14:40 UTCJun 3, 15:00 UTC20m
2026-06-03 PAT16 - Jun 3, 13:05 UTCJun 3, 14:10 UTC1h 5m
2026-05-20 PAT04 - May 20, 16:30 UTCMay 20, 17:00 UTC30m
2026-05-20 PAT04 - May 20, 12:45 UTCMay 20, 13:30 UTC45m
2026-05-19 PAT27 - May 19, 01:10 UTCMay 19, 03:00 UTC1h 50m
2026-05-18 PAT27 - May 18, 23:20 UTCMay 19, 00:40 UTC1h 20m
2026-05-07 PAT30 - May 7, 23:49 UTCMay 7, 23:59 UTC10m
2026-05-07 PAT30 - May 7, 17:30 UTCMay 7, 17:45 UTC15m
2026-05-06 PAT22 - May 6, 13:35 UTCMay 6, 14:35 UTC1h 0m
2026-05-06 PAT22 - May 6, 09:40 UTCMay 6, 11:15 UTC1h 35m
2026-05-06 PAT04 - May 6, 02:05 UTCMay 6, 02:40 UTC35m
2026-04-23 PAT26 - Apr 23, 17:50 UTCApr 23, 19:05 UTC1h 15m
2026-04-23 PAT26 - Apr 23, 14:25 UTCApr 23, 15:45 UTC1h 20m
2026-04-23 PAT26 - Apr 23, 12:35 UTCApr 23, 13:55 UTC1h 20m
2026-04-22 PAT22 - Apr 22, 18:30 UTCApr 22, 18:40 UTC10m
2026-04-22 PAT22 - Apr 22, 17:40 UTCApr 22, 17:50 UTC10m
2026-04-22 PAT22 - Apr 22, 14:25 UTCApr 22, 15:15 UTC50m
2026-04-21 PAT23 - Apr 21, 00:25 UTCApr 21, 02:20 UTC1h 55m
2026-04-20 PAT23 - Apr 20, 23:20 UTCApr 21, 00:10 UTC50m
2026-04-15 PAT28 - Apr 15, 17:30 UTCApr 15, 17:55 UTC25m
2026-04-15 PAT28 - Apr 15, 13:45 UTCApr 15, 14:15 UTC30m

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 15-20735 page for operator, model, and routing details .

Mode-S AE5AC1 frequently asked

What is Mode-S code AE5AC1?
AE5AC1 is an ICAO 24-bit transponder address. Assigned to 15-20735.
Is AE5AC1 broadcasting right now?
No active broadcast right now. Last signal was 14h ago.
Hex, octal, and decimal Mode-S codes: what's the difference?
The same 24-bit identifier expressed in different bases: hex AE5AC1, octal 53455301, decimal 11,426,497.
What flights does AE5AC1 operate?
Mode-S AE5AC1 has broadcast 11 distinct callsigns, including PAT22, PAT23, PAT26, PAT16, PAT04.