Apparatus

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sensors Mode-S transponder

AD03D5

ICAO 24-bit transponder address · allocated to United States

Currently assigned to N938ER · CESSNA 172 Skyhawk · operated by EMBRY-RIDDLE AERONAUTICAL UNIVERSITY

Hex
AD03D5
Octal
53201725
Decimal
11,338,709
Country
US
Tail
N938ER
Type
C172
No current signal · last broadcast 20d ago
Flights observed
243
Distinct callsigns
1
Country
US
Last broadcast
20d ago

Last known position

Most recent position reported by Mode-S AD03D5.

Country allocation

The ICAO 24-bit address AD03D5 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
ERU938 - 243 2026-07-26

Recent flights last 50

DateFlightRouteTakeoffLandingDuration
2026-07-26 ERU938 - Jul 26, 15:50 UTCJul 26, 16:40 UTC50m
2026-07-26 ERU938 - Jul 26, 10:20 UTCJul 26, 11:35 UTC1h 15m
2026-07-25 ERU938 - Jul 25, 17:50 UTCJul 25, 19:15 UTC1h 25m
2026-07-25 ERU938 - Jul 25, 14:35 UTCJul 25, 15:00 UTC25m
2026-07-25 ERU938 - Jul 25, 11:35 UTCJul 25, 12:05 UTC30m
2026-07-25 ERU938 - Jul 25, 00:40 UTCJul 25, 01:45 UTC1h 5m
2026-07-24 ERU938 - Jul 24, 20:35 UTCJul 24, 22:55 UTC2h 20m
2026-07-24 ERU938 - Jul 24, 18:20 UTCJul 24, 19:00 UTC40m
2026-07-24 ERU938 - Jul 24, 15:10 UTCJul 24, 16:15 UTC1h 5m
2026-07-23 ERU938 - Jul 23, 11:50 UTCJul 23, 12:30 UTC40m
2026-07-23 ERU938 - Jul 23, 00:55 UTCJul 23, 01:45 UTC50m
2026-07-22 ERU938 - Jul 22, 11:15 UTCJul 22, 12:20 UTC1h 5m
2026-07-22 ERU938 - Jul 22, 02:45 UTCJul 22, 03:45 UTC1h 0m
2026-07-21 ERU938 - Jul 21, 22:40 UTCJul 21, 23:25 UTC45m
2026-07-21 ERU938 - Jul 21, 19:45 UTCJul 21, 20:55 UTC1h 10m
2026-07-21 ERU938 - Jul 21, 16:05 UTCJul 21, 16:30 UTC25m
2026-07-21 ERU938 - Jul 21, 11:25 UTCJul 21, 11:50 UTC25m
2026-07-21 ERU938 - Jul 21, 00:40 UTCJul 21, 01:45 UTC1h 5m
2026-07-20 ERU938 - Jul 20, 17:50 UTCJul 20, 18:15 UTC25m
2026-07-20 ERU938 - Jul 20, 11:40 UTCJul 20, 14:25 UTC2h 45m
2026-07-17 ERU938 - Jul 17, 16:34 UTCJul 17, 17:20 UTC45m
2026-07-16 ERU938 ORL → DAB Jul 16, 19:14 UTCJul 16, 19:50 UTC35m
2026-07-16 ERU938 ORL → ORL Jul 16, 18:00 UTCJul 16, 18:05 UTC5m
2026-07-16 ERU938 ORL → ORL Jul 16, 17:20 UTCJul 16, 17:30 UTC10m
2026-07-16 ERU938 ORL → ORL Jul 16, 16:15 UTCJul 16, 16:19 UTC5m
2026-07-16 ERU938 ORL → ORL Jul 16, 15:40 UTCJul 16, 15:49 UTC10m
2026-07-16 ERU938 - Jul 16, 15:00 UTCJul 16, 15:10 UTC10m
2026-07-16 ERU938 ORL → ORL Jul 16, 14:05 UTCJul 16, 14:25 UTC20m
2026-07-16 ERU938 ORL → ORL Jul 16, 13:10 UTCJul 16, 13:25 UTC15m
2026-07-16 ERU938 ORL → ORL Jul 16, 12:30 UTCJul 16, 12:44 UTC15m
2026-07-16 ERU938 - Jul 16, 11:10 UTCJul 16, 11:34 UTC25m
2026-07-15 ERU938 - Jul 15, 22:30 UTCJul 15, 23:05 UTC35m
2026-07-15 ERU938 - Jul 15, 17:50 UTCJul 15, 18:20 UTC30m
2026-07-14 ERU938 - Jul 14, 14:55 UTCJul 14, 16:05 UTC1h 10m
2026-07-14 ERU938 - Jul 14, 10:40 UTCJul 14, 12:00 UTC1h 20m
2026-07-13 ERU938 - Jul 13, 16:15 UTCJul 13, 17:40 UTC1h 25m
2026-07-13 ERU938 - Jul 13, 12:35 UTCJul 13, 14:00 UTC1h 25m
2026-07-10 ERU938 - Jul 10, 20:30 UTCJul 10, 21:20 UTC50m
2026-07-10 ERU938 - Jul 10, 16:10 UTCJul 10, 17:15 UTC1h 5m
2026-07-10 ERU938 - Jul 10, 12:35 UTCJul 10, 14:05 UTC1h 30m
2026-07-09 ERU938 - Jul 9, 13:25 UTCJul 9, 14:35 UTC1h 10m
2026-07-08 ERU938 - Jul 8, 12:45 UTCJul 8, 14:10 UTC1h 25m
2026-07-02 ERU938 - Jul 2, 12:45 UTCJul 2, 14:40 UTC1h 55m
2026-06-30 ERU938 - Jun 30, 12:55 UTCJun 30, 14:15 UTC1h 20m
2026-06-29 ERU938 - Jun 29, 12:45 UTCJun 29, 13:44 UTC1h 0m
2026-06-26 ERU938 - Jun 26, 17:40 UTCJun 26, 18:44 UTC1h 5m
2026-06-26 ERU938 - Jun 26, 13:15 UTCJun 26, 14:44 UTC1h 30m
2026-06-25 ERU938 - Jun 25, 18:24 UTCJun 25, 19:05 UTC40m
2026-06-25 ERU938 - Jun 25, 15:10 UTCJun 25, 16:50 UTC1h 40m
2026-06-25 ERU938 - Jun 25, 11:54 UTCJun 25, 13:09 UTC1h 15m

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 N938ER page for operator, model, and routing details .

Mode-S AD03D5 frequently asked

What is Mode-S code AD03D5?
AD03D5 is an ICAO 24-bit transponder address. Allocated to United States. Assigned to N938ER.
Where is Mode-S AD03D5 registered?
Mode-S code AD03D5 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 AD03D5 broadcasting right now?
No active broadcast right now. Last signal was 20d ago.
Hex, octal, and decimal Mode-S codes: what's the difference?
The same 24-bit identifier expressed in different bases: hex AD03D5, octal 53201725, decimal 11,338,709.
What flights does AD03D5 operate?
Mode-S AD03D5 has broadcast 1 distinct callsign, including ERU938.