Apparatus

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sensors Mode-S transponder

ADF1D3

ICAO 24-bit transponder address · allocated to United States

Currently assigned to N998RA · CESSNA 172 Skyhawk · operated by SCHUBERT BROTHERS AVIATION INC

Hex
ADF1D3
Octal
53370723
Decimal
11,399,635
Country
US
Tail
N998RA
Type
C172
No current signal · last broadcast 7h ago
Flights observed
235
Distinct callsigns
1
Country
US
Last broadcast
7h ago

Last known position

Most recent position reported by Mode-S ADF1D3.

Country allocation

The ICAO 24-bit address ADF1D3 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
N998RA - 235 2026-07-13

Recent flights last 50

DateFlightRouteTakeoffLandingDuration
2026-07-13 N998RA - Jul 13, 23:50 UTCJul 14, 00:50 UTC1h 0m
2026-07-13 N998RA - Jul 13, 22:00 UTCJul 13, 22:50 UTC50m
2026-07-13 N998RA - Jul 13, 20:10 UTCJul 13, 21:00 UTC50m
2026-07-13 N998RA - Jul 13, 17:35 UTCJul 13, 19:15 UTC1h 40m
2026-07-13 N998RA - Jul 13, 11:50 UTCJul 13, 12:50 UTC1h 0m
2026-07-12 N998RA ROC → ROC Jul 12, 23:10 UTCJul 13, 01:01 UTC1h 50m
2026-07-12 N998RA ROC → ROC Jul 12, 20:10 UTCJul 12, 21:45 UTC1h 35m
2026-07-12 N998RA ROC → ROC Jul 12, 18:10 UTCJul 12, 19:01 UTC50m
2026-07-12 N998RA ROC → ROC Jul 12, 15:50 UTCJul 12, 16:50 UTC1h 0m
2026-07-12 N998RA - Jul 12, 13:55 UTCJul 12, 15:01 UTC1h 5m
2026-07-12 N998RA - Jul 12, 12:30 UTCJul 12, 13:01 UTC30m
2026-07-11 N998RA ROC → ROC Jul 11, 20:55 UTCJul 11, 22:15 UTC1h 20m
2026-07-11 N998RA ROC → ROC Jul 11, 19:40 UTCJul 11, 19:45 UTC5m
2026-07-11 N998RA ROC → ROC Jul 11, 19:15 UTCJul 11, 19:25 UTC10m
2026-07-11 N998RA ROC → ROC Jul 11, 18:00 UTCJul 11, 19:10 UTC1h 10m
2026-07-11 N998RA ROC → ROC Jul 11, 16:00 UTCJul 11, 16:40 UTC40m
2026-07-10 N998RA - Jul 10, 21:00 UTCJul 10, 21:05 UTC5m
2026-07-10 N998RA ROC → ROC Jul 10, 19:55 UTCJul 10, 20:45 UTC50m
2026-07-10 N998RA ROC → ROC Jul 10, 18:50 UTCJul 10, 18:55 UTC5m
2026-07-10 N998RA ROC → ROC Jul 10, 18:00 UTCJul 10, 18:05 UTC5m
2026-07-10 N998RA - Jul 10, 16:45 UTCJul 10, 16:55 UTC10m
2026-07-10 N998RA ROC → ROC Jul 10, 15:55 UTCJul 10, 16:00 UTC5m
2026-07-10 N998RA - Jul 10, 02:20 UTCJul 10, 03:05 UTC45m
2026-07-09 N998RA - Jul 9, 20:25 UTCJul 9, 20:30 UTC5m
2026-07-09 N998RA - Jul 9, 20:00 UTCJul 9, 20:10 UTC10m
2026-07-09 N998RA - Jul 9, 19:45 UTCJul 9, 19:55 UTC10m
2026-07-09 N998RA - Jul 9, 19:35 UTCJul 9, 19:40 UTC5m
2026-07-09 N998RA - Jul 9, 17:05 UTCJul 9, 18:50 UTC1h 45m
2026-07-09 N998RA - Jul 9, 15:30 UTCJul 9, 15:40 UTC10m
2026-07-09 N998RA ROC → ROC Jul 9, 13:50 UTCJul 9, 14:20 UTC30m
2026-07-09 N998RA - Jul 9, 13:40 UTCJul 9, 13:45 UTC5m
2026-07-09 N998RA - Jul 9, 11:35 UTCJul 9, 12:40 UTC1h 5m
2026-07-09 N998RA - Jul 9, 02:15 UTCJul 9, 02:40 UTC25m
2026-07-09 N998RA ROC → ROC Jul 9, 00:55 UTCJul 9, 02:10 UTC1h 15m
2026-07-08 N998RA - Jul 8, 22:55 UTCJul 8, 23:50 UTC55m
2026-07-08 N998RA - Jul 8, 21:05 UTCJul 8, 22:15 UTC1h 10m
2026-07-08 N998RA - Jul 8, 19:45 UTCJul 8, 19:50 UTC5m
2026-07-08 N998RA - Jul 8, 16:50 UTCJul 8, 16:55 UTC5m
2026-07-08 N998RA - Jul 8, 15:50 UTCJul 8, 16:45 UTC55m
2026-07-08 N998RA - Jul 8, 14:35 UTCJul 8, 14:45 UTC10m
2026-07-08 N998RA - Jul 8, 14:20 UTCJul 8, 14:30 UTC10m
2026-07-08 N998RA - Jul 8, 13:40 UTCJul 8, 13:45 UTC5m
2026-07-08 N998RA - Jul 8, 11:40 UTCJul 8, 12:40 UTC1h 0m
2026-07-07 N998RA ROC → ROC Jul 7, 22:00 UTCJul 7, 22:55 UTC55m
2026-07-07 N998RA ROC → ROC Jul 7, 20:40 UTCJul 7, 20:45 UTC5m
2026-07-07 N998RA ROC → ROC Jul 7, 20:05 UTCJul 7, 20:15 UTC10m
2026-07-07 N998RA ROC → ROC Jul 7, 19:40 UTCJul 7, 19:50 UTC10m
2026-07-07 N998RA ROC → ROC Jul 7, 17:40 UTCJul 7, 17:45 UTC5m
2026-07-07 N998RA ROC → ROC Jul 7, 17:20 UTCJul 7, 17:25 UTC5m
2026-07-07 N998RA ROC → ROC Jul 7, 17:00 UTCJul 7, 17:05 UTC5m

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 N998RA page for operator, model, and routing details .

Mode-S ADF1D3 frequently asked

What is Mode-S code ADF1D3?
ADF1D3 is an ICAO 24-bit transponder address. Allocated to United States. Assigned to N998RA.
Where is Mode-S ADF1D3 registered?
Mode-S code ADF1D3 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 ADF1D3 broadcasting right now?
No active broadcast right now. Last signal was 7h ago.
Hex, octal, and decimal Mode-S codes: what's the difference?
The same 24-bit identifier expressed in different bases: hex ADF1D3, octal 53370723, decimal 11,399,635.
What flights does ADF1D3 operate?
Mode-S ADF1D3 has broadcast 1 distinct callsign, including N998RA.