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sensors Mode-S transponder

AA11C1

ICAO 24-bit transponder address · allocated to United States

Currently assigned to N748RH · operated by UNITED HELICOPTER LEASING LLC

Hex
AA11C1
Octal
52410701
Decimal
11,145,665
Country
US
Tail
N748RH
Type
R66
No current signal · last broadcast 6h ago
Flights observed
199
Distinct callsigns
1
Country
US
Last broadcast
6h ago

Last known position

Most recent position reported by Mode-S AA11C1.

Country allocation

The ICAO 24-bit address AA11C1 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 1 distinct

Callsign Airline Flights Last seen
N748RH - 199 2026-07-14

Recent flights last 50

DateFlightRouteTakeoffLandingDuration
2026-07-14 N748RH - Jul 14, 01:35 UTCJul 14, 03:25 UTC1h 50m
2026-07-13 N748RH - Jul 13, 21:45 UTCJul 13, 22:30 UTC45m
2026-07-12 N748RH - Jul 12, 23:50 UTCJul 13, 00:20 UTC30m
2026-07-12 N748RH - Jul 12, 20:05 UTCJul 12, 21:35 UTC1h 30m
2026-07-12 N748RH - Jul 12, 03:01 UTCJul 12, 04:40 UTC1h 40m
2026-07-12 N748RH - Jul 12, 00:40 UTCJul 12, 02:20 UTC1h 40m
2026-07-11 N748RH - Jul 11, 20:55 UTCJul 11, 23:35 UTC2h 40m
2026-07-11 N748RH - Jul 11, 19:35 UTCJul 11, 19:45 UTC10m
2026-07-11 N748RH - Jul 11, 18:00 UTCJul 11, 18:20 UTC20m
2026-07-11 N748RH KOA → KOA Jul 11, 01:35 UTCJul 11, 02:30 UTC55m
2026-07-10 N748RH - Jul 10, 20:00 UTCJul 10, 20:05 UTC5m
2026-07-10 N748RH - Jul 10, 19:10 UTCJul 10, 19:15 UTC5m
2026-07-10 N748RH KOA → KOA Jul 10, 02:00 UTCJul 10, 02:45 UTC45m
2026-07-09 N748RH KOA → KOA Jul 9, 23:35 UTCJul 10, 00:40 UTC1h 5m
2026-07-09 N748RH - Jul 9, 21:45 UTCJul 9, 22:00 UTC15m
2026-07-09 N748RH - Jul 9, 20:15 UTCJul 9, 20:30 UTC15m
2026-07-09 N748RH - Jul 9, 16:35 UTCJul 9, 18:15 UTC1h 40m
2026-07-09 N748RH - Jul 9, 03:55 UTCJul 9, 04:55 UTC1h 0m
2026-07-09 N748RH - Jul 9, 01:50 UTCJul 9, 02:45 UTC55m
2026-07-08 N748RH - Jul 8, 23:45 UTCJul 9, 00:35 UTC50m
2026-07-08 N748RH - Jul 8, 20:40 UTCJul 8, 22:30 UTC1h 50m
2026-07-08 N748RH - Jul 8, 18:45 UTCJul 8, 19:30 UTC45m
2026-07-08 N748RH - Jul 8, 02:30 UTCJul 8, 03:20 UTC50m
2026-07-07 N748RH - Jul 7, 22:10 UTCJul 7, 23:05 UTC55m
2026-07-07 N748RH - Jul 7, 19:40 UTCJul 7, 21:35 UTC1h 55m
2026-07-07 N748RH - Jul 7, 03:00 UTCJul 7, 03:50 UTC50m
2026-07-06 N748RH - Jul 6, 21:15 UTCJul 6, 22:05 UTC50m
2026-07-06 N748RH - Jul 6, 19:05 UTCJul 6, 19:25 UTC20m
2026-07-06 N748RH - Jul 6, 02:50 UTCJul 6, 03:50 UTC1h 0m
2026-07-05 N748RH - Jul 5, 19:30 UTCJul 5, 20:20 UTC50m
2026-07-05 N748RH - Jul 5, 01:55 UTCJul 5, 03:55 UTC2h 0m
2026-07-04 N748RH - Jul 4, 20:25 UTCJul 4, 22:25 UTC2h 0m
2026-07-04 N748RH - Jul 4, 18:30 UTCJul 4, 18:45 UTC15m
2026-07-01 N748RH - Jul 1, 23:40 UTCJul 2, 00:25 UTC45m
2026-07-01 N748RH - Jul 1, 22:00 UTCJul 1, 22:55 UTC55m
2026-07-01 N748RH - Jul 1, 19:05 UTCJul 1, 20:55 UTC1h 50m
2026-06-29 N748RH - Jun 29, 23:29 UTCJun 30, 01:04 UTC1h 35m
2026-06-29 N748RH - Jun 29, 20:54 UTCJun 29, 21:50 UTC55m
2026-06-29 N748RH - Jun 29, 19:35 UTCJun 29, 20:19 UTC45m
2026-06-29 N748RH - Jun 29, 02:45 UTCJun 29, 03:39 UTC55m
2026-06-28 N748RH - Jun 28, 20:45 UTCJun 28, 22:49 UTC2h 5m
2026-06-27 N748RH - Jun 27, 23:29 UTCJun 28, 00:30 UTC1h 0m
2026-06-27 N748RH - Jun 27, 21:34 UTCJun 27, 22:20 UTC45m
2026-06-27 N748RH - Jun 27, 18:39 UTCJun 27, 20:39 UTC2h 0m
2026-06-27 N748RH - Jun 27, 02:45 UTCJun 27, 03:30 UTC45m
2026-06-26 N748RH - Jun 26, 18:34 UTCJun 26, 21:50 UTC3h 15m
2026-06-26 N748RH - Jun 26, 02:24 UTCJun 26, 03:10 UTC45m
2026-06-25 N748RH - Jun 25, 23:39 UTCJun 26, 01:39 UTC2h 0m
2026-06-25 N748RH - Jun 25, 21:25 UTCJun 25, 22:24 UTC1h 0m
2026-06-25 N748RH - Jun 25, 19:39 UTCJun 25, 20:25 UTC45m

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 N748RH page for operator, model, and routing details .

Mode-S AA11C1 frequently asked

What is Mode-S code AA11C1?
AA11C1 is an ICAO 24-bit transponder address. Allocated to United States. Assigned to N748RH.
Where is Mode-S AA11C1 registered?
Mode-S code AA11C1 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 AA11C1 broadcasting right now?
No active broadcast right now. Last signal was 6h ago.
Hex, octal, and decimal Mode-S codes: what's the difference?
The same 24-bit identifier expressed in different bases: hex AA11C1, octal 52410701, decimal 11,145,665.
What flights does AA11C1 operate?
Mode-S AA11C1 has broadcast 1 distinct callsign, including N748RH.