Apparatus

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sensors Mode-S transponder

AD9DF4

ICAO 24-bit transponder address · allocated to United States

Currently assigned to N977DC · EMBRAER ERJ-145 · operated by CBG LLC

Hex
AD9DF4
Octal
53316764
Decimal
11,378,164
Country
US
Tail
N977DC
Type
E145
No current signal · last broadcast Jul 26, 21:50 UTC
Flights observed
294
Distinct callsigns
20
Country
US
Last broadcast
Jul 26, 21:50 UTC

Last known position

Most recent position reported by Mode-S AD9DF4.

Country allocation

The ICAO 24-bit address AD9DF4 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
LYM500 - 82 2026-05-31
LYM5880 Key Lime Air 25 2026-07-26
LYM5870 Key Lime Air 24 2026-07-26
LYM5872 Key Lime Air 23 2026-07-26
LYM5882 Key Lime Air 22 2026-07-25
LYM5730 Key Lime Air 21 2026-07-24
LYM5745 Key Lime Air 20 2026-07-26
LYM5760 Key Lime Air 18 2026-07-26
LYM5775 Key Lime Air 17 2026-07-24
LYM3914 Key Lime Air 15 2026-07-24
LYM3912 Key Lime Air 14 2026-07-24
LYM5899 Key Lime Air 2 2026-06-26
LYM5799 - 2 2026-07-04
LYM173 Key Lime Air 2 2026-06-02
LYM733 Key Lime Air 1 2026-06-05
LYM610 Key Lime Air 1 2026-05-03
LYM5798 - 1 2026-07-04
LYM5475 Key Lime Air 1 2026-07-17
LYM411 Key Lime Air 1 2026-04-23
LYM373 Key Lime Air 1 2026-05-31

Recent flights last 50

DateFlightRouteTakeoffLandingDuration
2026-07-26 LYM5760 MKG → ORD Jul 26, 21:20 UTCJul 26, 21:50 UTC30m
2026-07-26 LYM5745 ORD → MKG Jul 26, 19:45 UTCJul 26, 20:20 UTC35m
2026-07-26 LYM5880 MKL → ORD Jul 26, 16:35 UTCJul 26, 18:00 UTC1h 25m
2026-07-26 LYM5872 ATL → MKL Jul 26, 15:05 UTCJul 26, 15:40 UTC35m
2026-07-26 LYM5870 MKL → ATL Jul 26, 13:05 UTCJul 26, 13:55 UTC50m
2026-07-25 LYM5882 ORD → MKL Jul 25, 22:25 UTCJul 25, 23:20 UTC55m
2026-07-25 LYM5880 MKL → ORD Jul 25, 16:40 UTCJul 25, 18:05 UTC1h 25m
2026-07-25 LYM5872 ATL → MKL Jul 25, 15:10 UTCJul 25, 15:45 UTC35m
2026-07-25 LYM5870 MKL → ATL Jul 25, 13:10 UTCJul 25, 14:00 UTC50m
2026-07-24 LYM5882 ORD → MKL Jul 24, 22:25 UTCJul 24, 23:20 UTC55m
2026-07-24 LYM3914 IWD → ORD Jul 24, 20:00 UTCJul 24, 21:05 UTC1h 5m
2026-07-24 LYM3912 ORD → IWD Jul 24, 18:15 UTCJul 24, 19:00 UTC45m
2026-07-24 LYM5730 MKG → ORD Jul 24, 12:25 UTCJul 24, 12:50 UTC25m
2026-07-24 LYM5775 ORD → MKG Jul 24, 00:50 UTCJul 24, 01:20 UTC30m
2026-07-23 LYM5760 MKG → ORD Jul 23, 21:35 UTCJul 23, 22:00 UTC25m
2026-07-23 LYM5745 ORD → MKG Jul 23, 19:55 UTCJul 23, 20:20 UTC25m
2026-07-23 LYM5880 MKL → ORD Jul 23, 17:00 UTCJul 23, 18:20 UTC1h 20m
2026-07-23 LYM5872 ATL → MKL Jul 23, 15:25 UTCJul 23, 16:10 UTC45m
2026-07-23 LYM5870 MKL → ATL Jul 23, 13:10 UTCJul 23, 14:00 UTC50m
2026-07-22 LYM5882 ORD → MKL Jul 22, 23:40 UTCJul 23, 01:45 UTC2h 5m
2026-07-22 LYM5760 MKG → ORD Jul 22, 21:30 UTCJul 22, 22:15 UTC45m
2026-07-22 LYM5745 ORD → MKG Jul 22, 20:20 UTCJul 22, 20:45 UTC25m
2026-07-21 LYM5880 MKL → ORD Jul 21, 16:35 UTCJul 21, 18:00 UTC1h 25m
2026-07-21 LYM5872 ATL → MKL Jul 21, 15:05 UTCJul 21, 15:50 UTC45m
2026-07-21 LYM5870 MKL → ATL Jul 21, 13:15 UTCJul 21, 14:00 UTC45m
2026-07-20 LYM5882 ORD → MKL Jul 20, 22:10 UTCJul 20, 23:10 UTC1h 0m
2026-07-20 LYM3914 IWD → ORD Jul 20, 19:55 UTCJul 20, 20:55 UTC1h 0m
2026-07-20 LYM3912 ORD → IWD Jul 20, 18:10 UTCJul 20, 18:50 UTC40m
2026-07-20 LYM5730 - Jul 20, 12:20 UTCJul 20, 12:45 UTC25m
2026-07-19 LYM5775 - Jul 19, 23:20 UTCJul 19, 23:45 UTC25m
2026-07-19 LYM5760 MKG → ORD Jul 19, 21:10 UTCJul 19, 22:00 UTC50m
2026-07-19 LYM5745 ORD → MKG Jul 19, 19:30 UTCJul 19, 20:00 UTC30m
2026-07-19 LYM5880 MKL → ORD Jul 19, 16:40 UTCJul 19, 18:10 UTC1h 30m
2026-07-19 LYM5872 ATL → MKL Jul 19, 14:55 UTCJul 19, 15:35 UTC40m
2026-07-19 LYM5870 - Jul 19, 13:00 UTCJul 19, 13:45 UTC45m
2026-07-18 LYM5882 - Jul 18, 22:10 UTCJul 18, 23:20 UTC1h 10m
2026-07-18 LYM5730 - Jul 18, 12:35 UTCJul 18, 13:00 UTC25m
2026-07-18 LYM5775 - Jul 18, 00:50 UTCJul 18, 01:25 UTC35m
2026-07-17 LYM5760 MKG → ORD Jul 17, 22:55 UTCJul 17, 23:30 UTC35m
2026-07-17 LYM5475 ORD → MKG Jul 17, 21:10 UTCJul 17, 21:44 UTC35m
2026-07-17 LYM5880 MKL → ORD Jul 17, 19:15 UTCJul 17, 19:55 UTC40m
2026-07-17 LYM5880 MKL → ORD Jul 17, 16:59 UTCJul 17, 18:15 UTC1h 15m
2026-07-17 LYM5872 ATL → MKL Jul 17, 15:29 UTCJul 17, 16:04 UTC35m
2026-07-17 LYM5870 - Jul 17, 13:10 UTCJul 17, 13:50 UTC40m
2026-07-16 LYM5882 - Jul 16, 22:25 UTCJul 16, 23:25 UTC1h 0m
2026-07-16 LYM3914 - Jul 16, 20:05 UTCJul 16, 21:00 UTC55m
2026-07-16 LYM3912 - Jul 16, 18:15 UTCJul 16, 18:55 UTC40m
2026-07-16 LYM5730 - Jul 16, 12:25 UTCJul 16, 12:55 UTC30m
2026-07-15 LYM5775 - Jul 15, 23:10 UTCJul 15, 23:35 UTC25m
2026-07-15 LYM5760 - Jul 15, 21:30 UTCJul 15, 21:55 UTC25m

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 N977DC page for operator, model, and routing details .

Mode-S AD9DF4 frequently asked

What is Mode-S code AD9DF4?
AD9DF4 is an ICAO 24-bit transponder address. Allocated to United States. Assigned to N977DC.
Where is Mode-S AD9DF4 registered?
Mode-S code AD9DF4 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 AD9DF4 broadcasting right now?
No active broadcast right now. Last signal was Jul 26, 21:50 UTC.
Hex, octal, and decimal Mode-S codes: what's the difference?
The same 24-bit identifier expressed in different bases: hex AD9DF4, octal 53316764, decimal 11,378,164.
What flights does AD9DF4 operate?
Mode-S AD9DF4 has broadcast 20 distinct callsigns, including LYM500, LYM5880, LYM5870, LYM5872, LYM5882.