Apparatus

Try JFK, AAL1290, BAW, or N225AN.

sensors Mode-S transponder

ADEE38

ICAO 24-bit transponder address · allocated to United States

Currently assigned to N997SD · AEROSPATIALE AS-350 Ecureuil · operated by COUNTY OF RIVERSIDE CALIFORNIA

Hex
ADEE38
Octal
53367070
Decimal
11,398,712
Country
US
Tail
N997SD
Type
AS50
No current signal · last broadcast 23d ago
Flights observed
53
Distinct callsigns
1
Country
US
Last broadcast
23d ago

Last known position

Most recent position reported by Mode-S ADEE38.

Country allocation

The ICAO 24-bit address ADEE38 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
N997SD - 53 2026-05-06

Recent flights last 50

DateFlightRouteTakeoffLandingDuration
2026-05-06 N997SD - May 6, 16:05 UTCMay 6, 16:30 UTC25m
2026-05-01 N997SD - May 1, 21:20 UTCMay 1, 21:30 UTC10m
2026-04-30 N997SD - Apr 30, 19:30 UTCApr 30, 19:40 UTC10m
2026-04-30 N997SD - Apr 30, 17:00 UTCApr 30, 17:30 UTC30m
2026-04-29 N997SD - Apr 29, 23:50 UTCApr 30, 00:00 UTC10m
2026-04-29 N997SD - Apr 29, 17:30 UTCApr 29, 17:50 UTC20m
2026-04-28 N997SD - Apr 28, 04:20 UTCApr 28, 04:35 UTC15m
2026-04-27 N997SD HMT → HMT Apr 27, 22:05 UTCApr 27, 23:25 UTC1h 20m
2026-04-27 N997SD - Apr 27, 18:45 UTCApr 27, 18:55 UTC10m
2026-04-26 N997SD - Apr 26, 22:25 UTCApr 26, 23:35 UTC1h 10m
2026-04-25 N997SD - Apr 25, 18:15 UTCApr 25, 18:35 UTC20m
2026-04-24 N997SD - Apr 24, 21:35 UTCApr 24, 21:45 UTC10m
2026-04-23 N997SD - Apr 23, 06:01 UTCApr 23, 08:05 UTC2h 5m
2026-04-23 N997SD - Apr 23, 02:20 UTCApr 23, 05:15 UTC2h 55m
2026-04-23 N997SD HMT → HMT Apr 23, 00:00 UTCApr 23, 00:20 UTC20m
2026-04-22 N997SD HMT → HMT Apr 22, 23:20 UTCApr 22, 23:55 UTC35m
2026-04-22 N997SD - Apr 22, 20:20 UTCApr 22, 22:15 UTC1h 55m
2026-04-22 N997SD HMT → HMT Apr 22, 17:00 UTCApr 22, 18:40 UTC1h 40m
2026-04-22 N997SD HMT → HMT Apr 22, 14:50 UTCApr 22, 16:10 UTC1h 20m
2026-04-22 N997SD - Apr 22, 01:55 UTCApr 22, 03:25 UTC1h 30m
2026-04-21 N997SD - Apr 21, 07:20 UTCApr 21, 08:20 UTC1h 0m
2026-04-21 N997SD HMT → HMT Apr 21, 01:05 UTCApr 21, 03:25 UTC2h 20m
2026-04-20 N997SD - Apr 20, 23:15 UTCApr 21, 00:20 UTC1h 5m
2026-04-20 N997SD - Apr 20, 06:20 UTCApr 20, 07:55 UTC1h 35m
2026-04-20 N997SD HMT → HMT Apr 20, 02:40 UTCApr 20, 04:50 UTC2h 10m
2026-04-19 N997SD - Apr 19, 23:20 UTCApr 20, 01:00 UTC1h 40m
2026-04-19 N997SD - Apr 19, 07:40 UTCApr 19, 09:05 UTC1h 25m
2026-04-19 N997SD - Apr 19, 07:15 UTCApr 19, 07:30 UTC15m
2026-04-19 N997SD - Apr 19, 02:45 UTCApr 19, 04:50 UTC2h 5m
2026-04-18 N997SD HMT → HMT Apr 18, 22:55 UTCApr 19, 00:55 UTC2h 0m
2026-04-18 N997SD HMT → HMT Apr 18, 08:05 UTCApr 18, 08:30 UTC25m
2026-04-18 N997SD - Apr 18, 03:25 UTCApr 18, 04:20 UTC55m
2026-04-18 N997SD - Apr 18, 02:25 UTCApr 18, 03:20 UTC55m
2026-04-17 N997SD - Apr 17, 23:25 UTCApr 18, 01:20 UTC1h 55m
2026-04-17 N997SD - Apr 17, 22:55 UTCApr 17, 23:10 UTC15m
2026-04-17 N997SD - Apr 17, 05:20 UTCApr 17, 05:50 UTC30m
2026-04-17 N997SD - Apr 17, 03:50 UTCApr 17, 05:15 UTC1h 26m
2026-04-17 N997SD - Apr 17, 01:20 UTCApr 17, 01:55 UTC35m
2026-04-17 N997SD - Apr 17, 00:10 UTCApr 17, 01:15 UTC1h 5m
2026-04-16 N997SD - Apr 16, 07:09 UTCApr 16, 08:40 UTC1h 30m
2026-04-16 N997SD - Apr 16, 06:49 UTCApr 16, 07:05 UTC15m
2026-04-16 N997SD - Apr 16, 03:09 UTCApr 16, 04:14 UTC1h 5m
2026-04-16 N997SD - Apr 16, 02:09 UTCApr 16, 03:04 UTC55m
2026-04-16 N997SD HMT → HMT Apr 16, 00:05 UTCApr 16, 00:55 UTC50m
2026-04-15 N997SD - Apr 15, 07:01 UTCApr 15, 07:55 UTC55m
2026-04-15 N997SD - Apr 15, 05:20 UTCApr 15, 06:55 UTC1h 35m
2026-04-15 N997SD - Apr 15, 02:55 UTCApr 15, 03:05 UTC10m
2026-04-15 N997SD - Apr 15, 02:10 UTCApr 15, 02:50 UTC40m
2026-04-15 N997SD - Apr 15, 01:30 UTCApr 15, 01:45 UTC15m
2026-04-14 N997SD RAL → HMT Apr 14, 07:10 UTCApr 14, 08:40 UTC1h 30m

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 N997SD page for operator, model, and routing details .

Mode-S ADEE38 frequently asked

What is Mode-S code ADEE38?
ADEE38 is an ICAO 24-bit transponder address. Allocated to United States. Assigned to N997SD.
Where is Mode-S ADEE38 registered?
Mode-S code ADEE38 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 ADEE38 broadcasting right now?
No active broadcast right now. Last signal was 23d ago.
Hex, octal, and decimal Mode-S codes: what's the difference?
The same 24-bit identifier expressed in different bases: hex ADEE38, octal 53367070, decimal 11,398,712.
What flights does ADEE38 operate?
Mode-S ADEE38 has broadcast 1 distinct callsign, including N997SD.