Apparatus

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sensors Mode-S transponder

A188BA

ICAO 24-bit transponder address · allocated to United States

Currently assigned to N1983X · CESSNA 208 Caravan · operated by SOUTHERN AIRWAYS PACIFIC LLC

Hex
A188BA
Octal
50304272
Decimal
10,586,298
Country
US
Tail
N1983X
Type
C208
No current signal · last broadcast Jul 21, 22:30 UTC
Flights observed
335
Distinct callsigns
20
Country
US
Last broadcast
Jul 21, 22:30 UTC

Last known position

Most recent position reported by Mode-S A188BA.

Country allocation

The ICAO 24-bit address A188BA 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 20 distinct

Callsign Airline Flights Last seen
FDY127 Southern Airways Express 36 2026-07-21
FDY128 Southern Airways Express 33 2026-07-21
FDY124 Southern Airways Express 31 2026-07-21
FDY395 Southern Airways Express 27 2026-06-01
FDY394 Southern Airways Express 22 2026-06-01
FDY129 Southern Airways Express 21 2026-06-02
FDY126 - 14 2026-07-21
FDY125 - 12 2026-07-21
FDY121 Southern Airways Express 12 2026-07-21
FDY246 Southern Airways Express 11 2026-05-22
FDY245 Southern Airways Express 11 2026-06-01
FDY247 Southern Airways Express 10 2026-05-22
FDY244 Southern Airways Express 10 2026-06-01
FDY243 Southern Airways Express 8 2026-05-22
FDY239 - 8 2026-07-08
FDY232 - 8 2026-07-07
FDY248 Southern Airways Express 7 2026-05-21
FDY238 - 7 2026-07-07
FDY235 Southern Airways Express 6 2026-07-07
FDY233 - 6 2026-07-07

Recent flights last 50

DateFlightRouteTakeoffLandingDuration
2026-07-21 FDY121 IAD → DUJ Jul 21, 21:25 UTCJul 21, 22:30 UTC1h 5m
2026-07-21 FDY128 DUJ → IAD Jul 21, 19:05 UTCJul 21, 20:05 UTC1h 0m
2026-07-21 FDY127 IAD → DUJ Jul 21, 16:40 UTCJul 21, 17:40 UTC1h 0m
2026-07-21 FDY126 - Jul 21, 14:25 UTCJul 21, 15:20 UTC55m
2026-07-21 FDY125 - Jul 21, 12:05 UTCJul 21, 13:00 UTC55m
2026-07-21 FDY124 DUJ → IAD Jul 21, 10:00 UTCJul 21, 10:55 UTC55m
2026-07-20 FDY121 IAD → DUJ Jul 20, 21:00 UTCJul 20, 22:00 UTC1h 0m
2026-07-20 FDY128 DUJ → IAD Jul 20, 19:00 UTCJul 20, 20:15 UTC1h 15m
2026-07-20 FDY127 IAD → DUJ Jul 20, 16:55 UTCJul 20, 17:50 UTC55m
2026-07-20 FDY124 - Jul 20, 09:55 UTCJul 20, 11:00 UTC1h 5m
2026-07-13 FDY121 - Jul 13, 21:10 UTCJul 13, 22:10 UTC1h 0m
2026-07-13 FDY128 - Jul 13, 19:05 UTCJul 13, 20:05 UTC1h 0m
2026-07-13 FDY127 - Jul 13, 16:50 UTCJul 13, 17:50 UTC1h 0m
2026-07-13 FDY124 - Jul 13, 09:55 UTCJul 13, 10:50 UTC55m
2026-07-08 FDY239 - Jul 8, 01:20 UTCJul 8, 01:45 UTC25m
2026-07-07 FDY307 - Jul 7, 23:10 UTCJul 7, 23:35 UTC25m
2026-07-07 FDY308 - Jul 7, 21:25 UTCJul 7, 21:55 UTC30m
2026-07-07 FDY238 - Jul 7, 20:15 UTCJul 7, 20:45 UTC30m
2026-07-07 FDY235 PIT → DUJ Jul 7, 18:25 UTCJul 7, 18:50 UTC25m
2026-07-07 FDY232 - Jul 7, 16:55 UTCJul 7, 17:20 UTC25m
2026-07-07 FDY233 - Jul 7, 15:10 UTCJul 7, 15:45 UTC35m
2026-07-07 FDY305 - Jul 7, 14:00 UTCJul 7, 14:30 UTC30m
2026-07-07 FDY304 - Jul 7, 12:20 UTCJul 7, 12:55 UTC35m
2026-07-07 FDY227 - Jul 7, 10:45 UTCJul 7, 11:20 UTC35m
2026-07-01 FDY121 IAD → DUJ Jul 1, 22:20 UTCJul 1, 23:20 UTC1h 0m
2026-07-01 FDY128 - Jul 1, 19:10 UTCJul 1, 20:05 UTC55m
2026-07-01 FDY127 - Jul 1, 17:05 UTCJul 1, 18:15 UTC1h 10m
2026-07-01 FDY124 - Jul 1, 09:55 UTCJul 1, 10:45 UTC50m
2026-06-29 FDY121 IAD → DUJ Jun 29, 21:30 UTCJun 29, 22:30 UTC1h 0m
2026-06-29 FDY128 - Jun 29, 19:05 UTCJun 29, 20:15 UTC1h 10m
2026-06-29 FDY127 - Jun 29, 16:39 UTCJun 29, 17:40 UTC1h 0m
2026-06-29 FDY124 - Jun 29, 10:50 UTCJun 29, 11:50 UTC1h 0m
2026-06-23 FDY121 IAD → DUJ Jun 23, 20:54 UTCJun 23, 21:54 UTC1h 0m
2026-06-23 FDY128 - Jun 23, 19:04 UTCJun 23, 20:10 UTC1h 5m
2026-06-23 FDY127 - Jun 23, 16:44 UTCJun 23, 17:44 UTC1h 0m
2026-06-23 FDY126 DUJ → IAD Jun 23, 14:35 UTCJun 23, 15:44 UTC1h 10m
2026-06-23 FDY125 - Jun 23, 11:59 UTCJun 23, 12:49 UTC50m
2026-06-23 FDY124 - Jun 23, 09:59 UTCJun 23, 11:10 UTC1h 10m
2026-06-23 FDY239 - Jun 23, 01:20 UTCJun 23, 01:45 UTC25m
2026-06-22 FDY307 - Jun 22, 23:14 UTCJun 22, 23:39 UTC25m
2026-06-22 FDY308 - Jun 22, 21:25 UTCJun 22, 21:54 UTC30m
2026-06-22 FDY238 - Jun 22, 20:14 UTCJun 22, 20:44 UTC30m
2026-06-22 FDY235 PIT → DUJ Jun 22, 18:15 UTCJun 22, 18:44 UTC30m
2026-06-22 FDY232 - Jun 22, 16:45 UTCJun 22, 17:20 UTC35m
2026-06-18 FDY121 IAD → DUJ Jun 18, 22:30 UTCJun 18, 23:10 UTC40m
2026-06-18 FDY121 IAD → DUJ Jun 18, 21:40 UTCJun 18, 22:25 UTC45m
2026-06-18 FDY128 - Jun 18, 19:05 UTCJun 18, 20:00 UTC55m
2026-06-18 FDY127 - Jun 18, 16:55 UTCJun 18, 18:10 UTC1h 15m
2026-06-18 FDY124 - Jun 18, 10:40 UTCJun 18, 11:45 UTC1h 5m
2026-06-17 FDY127 IAD → DUJ Jun 17, 16:45 UTCJun 17, 17:45 UTC1h 0m

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 N1983X page for operator, model, and routing details .

Mode-S A188BA frequently asked

What is Mode-S code A188BA?
A188BA is an ICAO 24-bit transponder address. Allocated to United States. Assigned to N1983X.
Where is Mode-S A188BA registered?
Mode-S code A188BA 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 A188BA broadcasting right now?
No active broadcast right now. Last signal was Jul 21, 22:30 UTC.
Hex, octal, and decimal Mode-S codes: what's the difference?
The same 24-bit identifier expressed in different bases: hex A188BA, octal 50304272, decimal 10,586,298.
What flights does A188BA operate?
Mode-S A188BA has broadcast 20 distinct callsigns, including FDY127, FDY128, FDY124, FDY395, FDY394.