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sensors Mode-S transponder

A0DD0F

ICAO 24-bit transponder address · allocated to United States

Currently assigned to N155DB · BELL 412 · operated by SALMON RIVER HELICOPTERS INC

Hex
A0DD0F
Octal
50156417
Decimal
10,542,351
Country
US
Tail
N155DB
Type
B412
No current signal · last broadcast 9d ago
Flights observed
139
Distinct callsigns
1
Country
US
Last broadcast
9d ago

Last known position

Most recent position reported by Mode-S A0DD0F.

Country allocation

The ICAO 24-bit address A0DD0F 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
N155DB - 139 2026-07-24

Recent flights last 50

DateFlightRouteTakeoffLandingDuration
2026-07-24 N155DB - Jul 24, 21:10 UTCJul 24, 23:10 UTC2h 0m
2026-07-24 N155DB - Jul 24, 18:30 UTCJul 24, 19:35 UTC1h 5m
2026-07-24 N155DB - Jul 24, 13:50 UTCJul 24, 15:45 UTC1h 55m
2026-07-23 N155DB - Jul 23, 21:45 UTCJul 23, 23:05 UTC1h 20m
2026-07-23 N155DB - Jul 23, 17:50 UTCJul 23, 19:20 UTC1h 30m
2026-07-23 N155DB - Jul 23, 14:30 UTCJul 23, 15:35 UTC1h 5m
2026-07-23 N155DB - Jul 23, 13:25 UTCJul 23, 13:40 UTC15m
2026-07-22 N155DB - Jul 22, 21:50 UTCJul 22, 23:10 UTC1h 20m
2026-07-22 N155DB - Jul 22, 17:50 UTCJul 22, 18:55 UTC1h 5m
2026-07-22 N155DB - Jul 22, 14:15 UTCJul 22, 15:20 UTC1h 5m
2026-07-22 N155DB - Jul 22, 13:20 UTCJul 22, 13:35 UTC15m
2026-07-21 N155DB - Jul 21, 21:50 UTCJul 21, 23:10 UTC1h 20m
2026-07-21 N155DB - Jul 21, 17:50 UTCJul 21, 19:00 UTC1h 10m
2026-07-21 N155DB - Jul 21, 14:10 UTCJul 21, 15:15 UTC1h 5m
2026-07-21 N155DB - Jul 21, 13:05 UTCJul 21, 13:15 UTC10m
2026-07-20 N155DB - Jul 20, 22:05 UTCJul 20, 23:15 UTC1h 10m
2026-07-20 N155DB - Jul 20, 19:55 UTCJul 20, 20:35 UTC40m
2026-07-20 N155DB - Jul 20, 17:00 UTCJul 20, 17:15 UTC15m
2026-07-20 N155DB - Jul 20, 14:10 UTCJul 20, 15:25 UTC1h 15m
2026-07-20 N155DB - Jul 20, 13:00 UTCJul 20, 13:15 UTC15m
2026-07-17 N155DB - Jul 17, 21:39 UTCJul 17, 23:10 UTC1h 30m
2026-07-17 N155DB - Jul 17, 18:00 UTCJul 17, 18:40 UTC40m
2026-07-17 N155DB - Jul 17, 14:04 UTCJul 17, 14:55 UTC50m
2026-07-17 N155DB - Jul 17, 12:55 UTCJul 17, 13:05 UTC10m
2026-07-16 N155DB - Jul 16, 22:05 UTCJul 16, 23:20 UTC1h 15m
2026-07-16 N155DB - Jul 16, 20:25 UTCJul 16, 21:05 UTC40m
2026-07-16 N155DB - Jul 16, 17:45 UTCJul 16, 18:25 UTC40m
2026-07-16 N155DB - Jul 16, 14:25 UTCJul 16, 15:05 UTC40m
2026-07-16 N155DB - Jul 16, 13:40 UTCJul 16, 13:49 UTC10m
2026-07-15 N155DB - Jul 15, 20:40 UTCJul 15, 22:45 UTC2h 5m
2026-07-15 N155DB - Jul 15, 16:50 UTCJul 15, 17:50 UTC1h 0m
2026-07-15 N155DB - Jul 15, 13:10 UTCJul 15, 14:35 UTC1h 25m
2026-07-14 N155DB - Jul 14, 22:00 UTCJul 14, 23:00 UTC59m
2026-07-14 N155DB - Jul 14, 17:45 UTCJul 14, 18:50 UTC1h 5m
2026-07-14 N155DB - Jul 14, 13:35 UTCJul 14, 14:50 UTC1h 15m
2026-07-13 N155DB - Jul 13, 22:05 UTCJul 13, 22:55 UTC50m
2026-07-13 N155DB - Jul 13, 20:45 UTCJul 13, 21:00 UTC15m
2026-07-13 N155DB - Jul 13, 19:05 UTCJul 13, 20:05 UTC1h 0m
2026-07-13 N155DB - Jul 13, 16:15 UTCJul 13, 16:50 UTC35m
2026-07-13 N155DB - Jul 13, 13:45 UTCJul 13, 15:15 UTC1h 30m
2026-07-13 N155DB - Jul 13, 12:45 UTCJul 13, 13:00 UTC15m
2026-07-12 N155DB - Jul 12, 19:05 UTCJul 12, 19:25 UTC20m
2026-07-12 N155DB - Jul 12, 12:45 UTCJul 12, 13:05 UTC20m
2026-07-10 N155DB - Jul 10, 22:00 UTCJul 10, 23:05 UTC1h 5m
2026-07-10 N155DB - Jul 10, 18:15 UTCJul 10, 19:25 UTC1h 10m
2026-07-10 N155DB - Jul 10, 14:05 UTCJul 10, 14:45 UTC40m
2026-07-10 N155DB - Jul 10, 12:55 UTCJul 10, 13:05 UTC10m
2026-07-09 N155DB - Jul 9, 22:10 UTCJul 9, 23:00 UTC50m
2026-07-09 N155DB - Jul 9, 20:15 UTCJul 9, 20:35 UTC20m
2026-07-09 N155DB - Jul 9, 18:40 UTCJul 9, 19:10 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 N155DB page for operator, model, and routing details .

Mode-S A0DD0F frequently asked

What is Mode-S code A0DD0F?
A0DD0F is an ICAO 24-bit transponder address. Allocated to United States. Assigned to N155DB.
Where is Mode-S A0DD0F registered?
Mode-S code A0DD0F 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 A0DD0F broadcasting right now?
No active broadcast right now. Last signal was 9d ago.
Hex, octal, and decimal Mode-S codes: what's the difference?
The same 24-bit identifier expressed in different bases: hex A0DD0F, octal 50156417, decimal 10,542,351.
What flights does A0DD0F operate?
Mode-S A0DD0F has broadcast 1 distinct callsign, including N155DB.