Apparatus

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sensors Mode-S transponder

AB3129

ICAO 24-bit transponder address · allocated to United States

Currently assigned to N820DC · SWEARINGEN Metro · operated by CBG LLC

Hex
AB3129
Octal
52630451
Decimal
11,219,241
Country
US
Tail
N820DC
Type
SW4
No current signal · last broadcast 14h ago
Flights observed
192
Distinct callsigns
20
Country
US
Last broadcast
14h ago

Last known position

Most recent position reported by Mode-S AB3129.

Country allocation

The ICAO 24-bit address AB3129 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
LYM4235 Key Lime Air 14 2026-05-29
LYM4230 Key Lime Air 14 2026-05-29
LYM3101 Key Lime Air 14 2026-05-27
LYM4212 Key Lime Air 13 2026-05-25
LYM4210 Key Lime Air 13 2026-05-25
LYM5930 Key Lime Air 12 2026-05-28
LYM5920 Key Lime Air 12 2026-05-28
LYM4133 Key Lime Air 11 2026-05-25
LYM3102 Key Lime Air 11 2026-05-27
LYM3105 Key Lime Air 10 2026-05-27
LYM3103 Key Lime Air 10 2026-05-27
LYM4144 Key Lime Air 8 2026-05-25
LYM4122 Key Lime Air 8 2026-05-17
LYM3109 Key Lime Air 7 2026-05-20
LYM3106 Key Lime Air 6 2026-05-20
LYM3104 Key Lime Air 6 2026-05-25
LYM5910 Key Lime Air 5 2026-05-26
LYM4155 Key Lime Air 5 2026-05-14
LYM5940 Key Lime Air 4 2026-05-26
LYM3110 Key Lime Air 4 2026-05-02

Recent flights last 50

DateFlightRouteTakeoffLandingDuration
2026-05-29 LYM4235 AIA → DEN May 29, 14:00 UTCMay 29, 14:45 UTC45m
2026-05-29 LYM4230 DEN → AIA May 29, 01:25 UTCMay 29, 01:55 UTC30m
2026-05-28 LYM5930 CDR → DEN May 28, 22:40 UTCMay 28, 23:20 UTC40m
2026-05-28 LYM5920 DEN → CDR May 28, 20:50 UTCMay 28, 21:25 UTC35m
2026-05-27 LYM3105 CEZ → DEN May 27, 23:50 UTCMay 28, 01:00 UTC1h 10m
2026-05-27 LYM3103 PHX → CEZ May 27, 20:20 UTCMay 27, 21:25 UTC1h 5m
2026-05-27 LYM3101 CEZ → PHX May 27, 17:55 UTCMay 27, 19:20 UTC1h 25m
2026-05-27 LYM3102 DEN → CEZ May 27, 16:05 UTCMay 27, 17:10 UTC1h 5m
2026-05-27 LYM4235 AIA → DEN May 27, 13:45 UTCMay 27, 14:20 UTC35m
2026-05-27 LYM4230 DEN → AIA May 27, 01:39 UTCMay 27, 02:09 UTC30m
2026-05-26 LYM3105 CEZ → DEN May 26, 22:29 UTCMay 26, 23:39 UTC1h 10m
2026-05-26 LYM3103 PHX → CEZ May 26, 20:15 UTCMay 26, 21:29 UTC1h 15m
2026-05-26 LYM3101 CEZ → PHX May 26, 17:59 UTCMay 26, 19:20 UTC1h 20m
2026-05-26 LYM3102 DEN → CEZ May 26, 16:20 UTCMay 26, 17:25 UTC1h 5m
2026-05-26 LYM5910 CDR → DEN May 26, 14:00 UTCMay 26, 14:45 UTC45m
2026-05-26 LYM5940 DEN → CDR May 26, 01:40 UTCMay 26, 02:10 UTC30m
2026-05-25 LYM4144 MCK → DEN May 25, 23:49 UTCMay 26, 00:35 UTC45m
2026-05-25 LYM4133 DEN → MCK May 25, 21:54 UTCMay 25, 22:25 UTC30m
2026-05-25 LYM4212 AIA → DEN May 25, 19:25 UTCMay 25, 19:59 UTC35m
2026-05-25 LYM4210 DEN → AIA May 25, 17:55 UTCMay 25, 18:20 UTC25m
2026-05-25 LYM3104 CEZ → DEN May 25, 13:35 UTCMay 25, 14:40 UTC1h 5m
2026-05-24 LYM5930 CDR → DEN May 24, 23:00 UTCMay 24, 23:10 UTC10m
2026-05-24 LYM5920 DEN → CDR May 24, 20:45 UTCMay 24, 21:20 UTC35m
2026-05-23 3105 - May 23, 22:35 UTCMay 23, 23:40 UTC1h 5m
2026-05-23 LYM3101 CEZ → PHX May 23, 20:20 UTCMay 23, 21:35 UTC1h 15m
2026-05-23 LYM3101 CEZ → PHX May 23, 18:05 UTCMay 23, 19:20 UTC1h 15m
2026-05-23 LYM3102 DEN → CEZ May 23, 16:15 UTCMay 23, 17:15 UTC1h 0m
2026-05-23 LYM4235 AIA → DEN May 23, 14:05 UTCMay 23, 14:40 UTC35m
2026-05-23 LYM4230 DEN → AIA May 23, 01:20 UTCMay 23, 01:50 UTC30m
2026-05-20 LYM3109 CEZ → DEN May 20, 19:30 UTCMay 20, 20:35 UTC1h 5m
2026-05-20 LYM3106 DEN → CEZ May 20, 17:40 UTCMay 20, 18:50 UTC1h 10m
2026-05-20 LYM5910 CDR → DEN May 20, 13:40 UTCMay 20, 14:35 UTC55m
2026-05-20 LYM5940 DEN → CDR May 20, 01:50 UTCMay 20, 02:25 UTC35m
2026-05-19 LYM5930 CDR → DEN May 19, 23:05 UTCMay 19, 23:45 UTC40m
2026-05-19 LYM5920 DEN → CDR May 19, 21:25 UTCMay 19, 21:55 UTC30m
2026-05-19 LYM4212 AIA → DEN May 19, 19:20 UTCMay 19, 20:05 UTC45m
2026-05-19 LYM4210 DEN → AIA May 19, 17:50 UTCMay 19, 18:15 UTC25m
2026-05-18 LYM3105 CEZ → DEN May 18, 22:30 UTCMay 18, 23:30 UTC1h 0m
2026-05-18 LYM3103 PHX → CEZ May 18, 20:20 UTCMay 18, 21:30 UTC1h 10m
2026-05-18 LYM3101 CEZ → PHX May 18, 18:00 UTCMay 18, 19:15 UTC1h 14m
2026-05-18 LYM3102 DEN → CEZ May 18, 16:05 UTCMay 18, 17:15 UTC1h 10m
2026-05-18 LYM4235 AIA → DEN May 18, 13:35 UTCMay 18, 14:25 UTC50m
2026-05-18 LYM4230 DEN → AIA May 18, 01:25 UTCMay 18, 01:55 UTC30m
2026-05-17 LYM3109 CEZ → DEN May 17, 22:40 UTCMay 17, 23:40 UTC1h 0m
2026-05-17 LYM820 MTJ → DEN May 17, 21:10 UTCMay 17, 22:20 UTC1h 10m
2026-05-17 LYM4212 AIA → DEN May 17, 19:15 UTCMay 17, 20:01 UTC45m
2026-05-17 LYM4210 DEN → AIA May 17, 17:50 UTCMay 17, 18:15 UTC25m
2026-05-17 LYM4122 MCK → DEN May 17, 13:55 UTCMay 17, 14:40 UTC45m
2026-05-16 LYM4133 DEN → MCK May 16, 21:40 UTCMay 16, 22:15 UTC35m
2026-05-16 LYM4166 MCK → DEN May 16, 19:40 UTCMay 16, 20:20 UTC40m

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 N820DC page for operator, model, and routing details .

Mode-S AB3129 frequently asked

What is Mode-S code AB3129?
AB3129 is an ICAO 24-bit transponder address. Allocated to United States. Assigned to N820DC.
Where is Mode-S AB3129 registered?
Mode-S code AB3129 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 AB3129 broadcasting right now?
No active broadcast right now. Last signal was 14h ago.
Hex, octal, and decimal Mode-S codes: what's the difference?
The same 24-bit identifier expressed in different bases: hex AB3129, octal 52630451, decimal 11,219,241.
What flights does AB3129 operate?
Mode-S AB3129 has broadcast 20 distinct callsigns, including LYM4235, LYM4230, LYM3101, LYM4212, LYM4210.