Apparatus

Try JFK, AAL1290, BAW, or N225AN.

sensors Mode-S transponder

AD53FD

ICAO 24-bit transponder address · allocated to United States

Currently assigned to N958SP · CESSNA 208 Caravan · operated by SOUTHERN AIRWAYS PACIFIC LLC

Hex
AD53FD
Octal
53251775
Decimal
11,359,229
Country
US
Tail
N958SP
Type
C208
No current signal · last broadcast 8d ago
Flights observed
150
Distinct callsigns
15
Country
US
Last broadcast
8d ago

Last known position

Most recent position reported by Mode-S AD53FD.

Country allocation

The ICAO 24-bit address AD53FD 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 15 distinct

Callsign Airline Flights Last seen
FDY436 Southern Airways Express 23 2026-05-10
FDY434 Southern Airways Express 23 2026-05-09
FDY419 Southern Airways Express 22 2026-05-10
FDY411 Southern Airways Express 20 2026-05-09
FDY408 Southern Airways Express 8 2026-05-20
FDY415 Southern Airways Express 7 2026-05-10
FDY409 Southern Airways Express 7 2026-05-20
FDY405 Southern Airways Express 7 2026-05-21
FDY404 Southern Airways Express 7 2026-05-21
FDY432 Southern Airways Express 6 2026-05-07
FDY417 Southern Airways Express 6 2026-05-07
FDY414 Southern Airways Express 5 2026-05-08
FDY67 Southern Airways Express 4 2026-05-18
FDY66 Southern Airways Express 4 2026-05-21
FDY8041 Southern Airways Express 1 2026-05-01

Recent flights last 50

DateFlightRouteTakeoffLandingDuration
2026-05-21 FDY66 HRO → MEM May 21, 17:05 UTCMay 21, 17:35 UTC30m
2026-05-21 FDY405 DFW → HRO May 21, 13:55 UTCMay 21, 15:30 UTC1h 35m
2026-05-21 FDY404 HRO → DFW May 21, 11:15 UTCMay 21, 12:55 UTC1h 40m
2026-05-20 FDY409 DFW → HRO May 20, 21:20 UTCMay 20, 22:50 UTC1h 30m
2026-05-20 FDY408 HRO → DFW May 20, 18:15 UTCMay 20, 20:00 UTC1h 45m
2026-05-20 FDY405 DFW → HRO May 20, 15:45 UTCMay 20, 17:15 UTC1h 30m
2026-05-20 FDY404 HRO → DFW May 20, 12:10 UTCMay 20, 14:05 UTC1h 55m
2026-05-20 FDY409 DFW → HRO May 20, 00:55 UTCMay 20, 02:35 UTC1h 40m
2026-05-19 FDY408 HRO → DFW May 19, 22:45 UTCMay 19, 23:30 UTC45m
2026-05-19 FDY408 HRO → DFW May 19, 17:55 UTCMay 19, 21:05 UTC3h 10m
2026-05-19 FDY405 DFW → HRO May 19, 14:15 UTCMay 19, 15:10 UTC55m
2026-05-19 FDY404 HRO → DFW May 19, 11:15 UTCMay 19, 13:15 UTC2h 0m
2026-05-19 FDY409 DFW → HRO May 19, 00:30 UTCMay 19, 01:55 UTC1h 25m
2026-05-18 FDY408 HRO → DFW May 18, 21:40 UTCMay 18, 23:35 UTC1h 55m
2026-05-18 FDY67 MEM → HRO May 18, 19:10 UTCMay 18, 19:45 UTC35m
2026-05-18 FDY66 HRO → MEM May 18, 17:05 UTCMay 18, 18:10 UTC1h 5m
2026-05-18 FDY405 DFW → HRO May 18, 14:30 UTCMay 18, 16:05 UTC1h 35m
2026-05-18 FDY404 HRO → DFW May 18, 11:20 UTCMay 18, 13:35 UTC2h 15m
2026-05-18 FDY409 DFW → HRO May 18, 00:55 UTCMay 18, 02:35 UTC1h 40m
2026-05-17 FDY408 HRO → DFW May 17, 21:35 UTCMay 17, 23:40 UTC2h 5m
2026-05-17 FDY67 MEM → HRO May 17, 18:45 UTCMay 17, 19:25 UTC40m
2026-05-17 FDY66 HRO → MEM May 17, 16:50 UTCMay 17, 17:45 UTC55m
2026-05-17 FDY405 DFW → HRO May 17, 14:05 UTCMay 17, 15:35 UTC1h 30m
2026-05-17 FDY404 HRO → DFW May 17, 11:15 UTCMay 17, 13:10 UTC1h 55m
2026-05-16 FDY409 DFW → HRO May 16, 20:40 UTCMay 16, 22:15 UTC1h 35m
2026-05-16 FDY408 HRO → DFW May 16, 17:45 UTCMay 16, 19:50 UTC2h 5m
2026-05-16 FDY405 DFW → HRO May 16, 14:20 UTCMay 16, 15:55 UTC1h 35m
2026-05-16 FDY404 HRO → DFW May 16, 11:16 UTCMay 16, 13:25 UTC2h 10m
2026-05-16 FDY409 DFW → HRO May 16, 01:00 UTCMay 16, 02:35 UTC1h 35m
2026-05-15 FDY408 HRO → DFW May 15, 21:35 UTCMay 15, 23:55 UTC2h 20m
2026-05-15 FDY67 MEM → HRO May 15, 18:45 UTCMay 15, 19:25 UTC40m
2026-05-15 FDY66 HRO → MEM May 15, 17:10 UTCMay 15, 18:00 UTC50m
2026-05-15 FDY405 DFW → HRO May 15, 14:15 UTCMay 15, 15:45 UTC1h 29m
2026-05-15 FDY404 HRO → DFW May 15, 11:15 UTCMay 15, 13:25 UTC2h 10m
2026-05-15 FDY409 DFW → HRO May 15, 00:45 UTCMay 15, 02:20 UTC1h 35m
2026-05-14 FDY408 HRO → DFW May 14, 21:35 UTCMay 14, 23:35 UTC2h 0m
2026-05-14 FDY67 MEM → HRO May 14, 19:25 UTCMay 14, 20:05 UTC40m
2026-05-10 FDY415 HOT → MEM May 10, 18:20 UTCMay 10, 18:35 UTC15m
2026-05-10 FDY419 DFW → HOT May 10, 15:39 UTCMay 10, 16:25 UTC45m
2026-05-10 FDY436 HOT → DFW May 10, 13:40 UTCMay 10, 14:40 UTC1h 0m
2026-05-09 FDY411 DFW → HOT May 9, 21:40 UTCMay 9, 22:34 UTC55m
2026-05-09 FDY434 HOT → DFW May 9, 19:19 UTCMay 9, 20:25 UTC1h 5m
2026-05-09 FDY419 DFW → HOT May 9, 15:45 UTCMay 9, 16:30 UTC45m
2026-05-09 FDY436 HOT → DFW May 9, 12:55 UTCMay 9, 14:00 UTC1h 5m
2026-05-09 FDY411 DFW → HOT May 9, 01:25 UTCMay 9, 02:25 UTC1h 0m
2026-05-08 FDY434 HOT → DFW May 8, 23:35 UTCMay 9, 00:45 UTC1h 10m
2026-05-08 FDY414 MEM → HOT May 8, 19:30 UTCMay 8, 19:55 UTC25m
2026-05-08 FDY415 HOT → MEM May 8, 18:20 UTCMay 8, 18:40 UTC20m
2026-05-08 FDY419 DFW → HOT May 8, 15:00 UTCMay 8, 15:45 UTC45m
2026-05-08 FDY436 HOT → DFW May 8, 12:55 UTCMay 8, 14:10 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 N958SP page for operator, model, and routing details .

Mode-S AD53FD frequently asked

What is Mode-S code AD53FD?
AD53FD is an ICAO 24-bit transponder address. Allocated to United States. Assigned to N958SP.
Where is Mode-S AD53FD registered?
Mode-S code AD53FD 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 AD53FD broadcasting right now?
No active broadcast right now. Last signal was 8d ago.
Hex, octal, and decimal Mode-S codes: what's the difference?
The same 24-bit identifier expressed in different bases: hex AD53FD, octal 53251775, decimal 11,359,229.
What flights does AD53FD operate?
Mode-S AD53FD has broadcast 15 distinct callsigns, including FDY436, FDY434, FDY419, FDY411, FDY408.