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 Jul 26, 20:55 UTC
Flights observed
380
Distinct callsigns
20
Country
US
Last broadcast
Jul 26, 20:55 UTC

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
LYM4212 Key Lime Air 28 2026-07-25
LYM4210 Key Lime Air 27 2026-07-25
LYM3101 Key Lime Air 24 2026-07-21
LYM5930 Key Lime Air 23 2026-07-24
LYM5920 Key Lime Air 22 2026-07-24
LYM4235 Key Lime Air 22 2026-07-21
LYM4230 Key Lime Air 21 2026-07-21
LYM4133 Key Lime Air 21 2026-07-23
LYM3103 Key Lime Air 20 2026-07-21
LYM3102 - 20 2026-07-21
LYM4122 Key Lime Air 18 2026-07-24
LYM3105 Key Lime Air 18 2026-07-21
LYM3104 Key Lime Air 16 2026-07-25
LYM4144 Key Lime Air 13 2026-07-24
LYM3109 Key Lime Air 13 2026-07-26
LYM3106 Key Lime Air 13 2026-07-26
LYM5910 Key Lime Air 12 2026-07-26
LYM5940 Key Lime Air 11 2026-07-26
LYM3110 Key Lime Air 11 2026-07-25
LYM4155 Key Lime Air 10 2026-07-24

Recent flights last 50

DateFlightRouteTakeoffLandingDuration
2026-07-26 LYM3109 CEZ → DEN Jul 26, 19:40 UTCJul 26, 20:55 UTC1h 15m
2026-07-26 LYM3106 DEN → CEZ Jul 26, 17:40 UTCJul 26, 18:45 UTC1h 5m
2026-07-26 LYM5910 CDR → DEN Jul 26, 13:40 UTCJul 26, 14:20 UTC40m
2026-07-26 LYM5940 DEN → CDR Jul 26, 01:40 UTCJul 26, 02:15 UTC35m
2026-07-25 LYM4212 AIA → DEN Jul 25, 20:05 UTCJul 25, 20:40 UTC35m
2026-07-25 LYM4210 DEN → AIA Jul 25, 18:30 UTCJul 25, 19:00 UTC30m
2026-07-25 LYM3104 CEZ → DEN Jul 25, 13:30 UTCJul 25, 14:40 UTC1h 10m
2026-07-25 LYM3110 CEZ → DEN Jul 25, 00:50 UTCJul 25, 02:25 UTC1h 35m
2026-07-24 LYM5930 CDR → DEN Jul 24, 22:25 UTCJul 24, 23:05 UTC40m
2026-07-24 LYM5920 DEN → CDR Jul 24, 20:35 UTCJul 24, 21:05 UTC30m
2026-07-24 LYM4122 MCK → DEN Jul 24, 13:55 UTCJul 24, 14:40 UTC45m
2026-07-24 LYM4155 DEN → MCK Jul 24, 01:55 UTCJul 24, 02:25 UTC30m
2026-07-24 LYM4144 MCK → DEN Jul 24, 00:30 UTCJul 24, 01:05 UTC35m
2026-07-23 LYM4133 DEN → MCK Jul 23, 22:00 UTCJul 23, 22:30 UTC30m
2026-07-23 LYM4212 AIA → DEN Jul 23, 19:00 UTCJul 23, 19:40 UTC40m
2026-07-23 LYM4210 DEN → AIA Jul 23, 17:25 UTCJul 23, 17:55 UTC30m
2026-07-23 LYM3104 CEZ → DEN Jul 23, 14:30 UTCJul 23, 15:30 UTC1h 0m
2026-07-23 LYM3199 PHX → CEZ Jul 23, 12:50 UTCJul 23, 13:50 UTC1h 0m
2026-07-23 LYM5930 CDR → DEN Jul 23, 01:40 UTCJul 23, 02:25 UTC45m
2026-07-22 LYM5920 DEN → CDR Jul 22, 20:25 UTCJul 22, 20:55 UTC30m
2026-07-21 LYM3105 CEZ → DEN Jul 21, 22:05 UTCJul 21, 23:30 UTC1h 25m
2026-07-21 LYM3103 PHX → CEZ Jul 21, 20:15 UTCJul 21, 21:35 UTC1h 20m
2026-07-21 LYM3101 CEZ → PHX Jul 21, 17:45 UTCJul 21, 18:55 UTC1h 10m
2026-07-21 LYM3102 DEN → CEZ Jul 21, 16:00 UTCJul 21, 17:00 UTC1h 0m
2026-07-21 LYM4235 AIA → DEN Jul 21, 13:50 UTCJul 21, 14:30 UTC40m
2026-07-21 LYM4230 DEN → AIA Jul 21, 01:15 UTCJul 21, 01:50 UTC35m
2026-07-20 LYM3109 CEZ → DEN Jul 20, 19:25 UTCJul 20, 20:40 UTC1h 15m
2026-07-20 LYM3106 DEN → CEZ Jul 20, 17:45 UTCJul 20, 18:45 UTC1h 0m
2026-07-20 LYM4122 - Jul 20, 14:10 UTCJul 20, 14:40 UTC30m
2026-07-20 LYM4155 DEN → MCK Jul 20, 01:05 UTCJul 20, 01:35 UTC30m
2026-07-19 LYM4144 - Jul 19, 23:40 UTCJul 20, 00:15 UTC35m
2026-07-19 LYM4133 DEN → MCK Jul 19, 21:35 UTCJul 19, 22:10 UTC35m
2026-07-19 LYM4212 AIA → DEN Jul 19, 19:15 UTCJul 19, 19:55 UTC40m
2026-07-19 LYM4210 - Jul 19, 17:35 UTCJul 19, 18:10 UTC35m
2026-07-19 LYM4122 - Jul 19, 14:05 UTCJul 19, 14:40 UTC35m
2026-07-18 LYM4133 DEN → MCK Jul 18, 21:55 UTCJul 18, 22:25 UTC30m
2026-07-18 LYM4166 - Jul 18, 19:35 UTCJul 18, 20:10 UTC35m
2026-07-18 LYM4177 DEN → MCK Jul 18, 17:55 UTCJul 18, 18:25 UTC30m
2026-07-16 LYM3106 DEN → DEN Jul 16, 18:05 UTCJul 16, 18:25 UTC20m
2026-07-13 LYM3104 - Jul 13, 13:35 UTCJul 13, 14:55 UTC1h 20m
2026-07-13 LYM3110 - Jul 13, 01:05 UTCJul 13, 02:05 UTC1h 0m
2026-07-12 LYM3105 - Jul 12, 22:35 UTCJul 12, 23:45 UTC1h 10m
2026-07-12 LYM3103 - Jul 12, 21:40 UTCJul 12, 21:50 UTC10m
2026-07-12 LYM3103 - Jul 12, 20:30 UTCJul 12, 21:05 UTC35m
2026-07-12 LYM3101 - Jul 12, 17:50 UTCJul 12, 19:05 UTC1h 15m
2026-07-12 LYM3102 DEN → CEZ Jul 12, 16:15 UTCJul 12, 17:15 UTC1h 0m
2026-07-12 LYM4122 - Jul 12, 13:35 UTCJul 12, 14:20 UTC45m
2026-07-11 LYM4133 - Jul 11, 22:20 UTCJul 11, 22:50 UTC30m
2026-07-11 LYM5930 - Jul 11, 01:45 UTCJul 11, 02:00 UTC15m
2026-07-10 LYM5930 - Jul 10, 22:55 UTCJul 11, 00:05 UTC1h 10m

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 Jul 26, 20:55 UTC.
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 LYM4212, LYM4210, LYM3101, LYM5930, LYM5920.