Apparatus

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sensors Mode-S transponder

AD87AA

ICAO 24-bit transponder address · allocated to United States

Currently assigned to N971DC · EMBRAER ERJ-145 · operated by CBG LLC

Hex
AD87AA
Octal
53303652
Decimal
11,372,458
Country
US
Tail
N971DC
Type
E145
Broadcasting now · callsign LYM5407 · 2,250 ft
Flights observed
310
Distinct callsigns
20
Country
US
Last broadcast
15h ago

Current position

AD87AA is currently broadcasting. Map zoomed to live position.

Country allocation

The ICAO 24-bit address AD87AA 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
LYM3585 - 26 2026-07-13
LYM3583 - 26 2026-07-13
LYM5418 - 25 2026-07-13
LYM5414 - 25 2026-07-12
LYM5407 - 22 2026-07-12
LYM5411 - 21 2026-07-12
LYM4803 - 21 2026-07-12
LYM4802 - 21 2026-07-12
LYM3581 - 16 2026-07-13
LYM3587 - 15 2026-07-12
LYM978 Key Lime Air 9 2026-05-06
LYM610 Key Lime Air 7 2026-05-18
LYM5882 Key Lime Air 5 2026-06-04
LYM4804 Key Lime Air 5 2026-04-30
LYM4801 Key Lime Air 5 2026-04-30
LYM411 Key Lime Air 5 2026-04-20
LYM864 Key Lime Air 4 2026-05-17
LYM825 Key Lime Air 4 2026-05-04
LYM5775 Key Lime Air 4 2026-06-05
LYM576 - 4 2026-06-15

Recent flights last 50

DateFlightRouteTakeoffLandingDuration
2026-07-13 LYM5418 - Jul 13, 23:20 UTCJul 14, 00:05 UTC45m
2026-07-13 LYM3585 - Jul 13, 20:15 UTCJul 13, 20:45 UTC30m
2026-07-13 LYM3583 - Jul 13, 18:40 UTCJul 13, 19:00 UTC20m
2026-07-13 LYM3581 - Jul 13, 14:10 UTCJul 13, 14:45 UTC35m
2026-07-12 LYM3587 - Jul 12, 23:55 UTCJul 13, 00:20 UTC25m
2026-07-12 LYM4803 PUB → DEN Jul 12, 22:05 UTCJul 12, 22:40 UTC35m
2026-07-12 LYM4802 DEN → PUB Jul 12, 20:35 UTCJul 12, 21:00 UTC25m
2026-07-12 LYM5414 - Jul 12, 18:10 UTCJul 12, 19:10 UTC1h 0m
2026-07-12 LYM5411 - Jul 12, 16:25 UTCJul 12, 17:15 UTC50m
2026-07-12 LYM5407 - Jul 12, 14:40 UTCJul 12, 15:35 UTC55m
2026-07-11 LYM5418 - Jul 11, 23:20 UTCJul 12, 00:05 UTC45m
2026-07-11 LYM3585 - Jul 11, 20:40 UTCJul 11, 21:15 UTC35m
2026-07-11 LYM3583 - Jul 11, 19:05 UTCJul 11, 19:30 UTC25m
2026-07-11 LYM3581 - Jul 11, 14:10 UTCJul 11, 14:45 UTC35m
2026-07-11 LYM3587 - Jul 11, 01:35 UTCJul 11, 02:00 UTC25m
2026-07-10 LYM4803 PUB → DEN Jul 10, 22:20 UTCJul 10, 23:05 UTC45m
2026-07-10 LYM4802 - Jul 10, 20:45 UTCJul 10, 21:15 UTC30m
2026-07-10 LYM5414 - Jul 10, 18:25 UTCJul 10, 19:25 UTC1h 0m
2026-07-10 LYM5411 - Jul 10, 16:30 UTCJul 10, 17:20 UTC50m
2026-07-10 LYM5407 - Jul 10, 14:30 UTCJul 10, 15:20 UTC50m
2026-07-09 LYM5418 - Jul 9, 23:20 UTCJul 10, 00:10 UTC50m
2026-07-09 LYM3585 - Jul 9, 20:25 UTCJul 9, 21:00 UTC35m
2026-07-09 LYM3583 - Jul 9, 18:45 UTCJul 9, 19:15 UTC30m
2026-07-09 LYM3581 - Jul 9, 14:20 UTCJul 9, 14:50 UTC30m
2026-07-09 LYM3587 - Jul 9, 00:15 UTCJul 9, 00:40 UTC25m
2026-07-07 LYM3585 - Jul 7, 20:35 UTCJul 7, 21:05 UTC30m
2026-07-07 LYM3583 - Jul 7, 19:20 UTCJul 7, 19:45 UTC25m
2026-07-06 LYM3585 - Jul 6, 20:15 UTCJul 6, 20:40 UTC25m
2026-07-06 LYM3583 - Jul 6, 18:50 UTCJul 6, 19:15 UTC25m
2026-07-06 LYM3581 - Jul 6, 14:20 UTCJul 6, 14:50 UTC30m
2026-07-05 LYM3587 - Jul 5, 23:40 UTCJul 6, 00:05 UTC25m
2026-07-05 LYM4803 PUB → DEN Jul 5, 22:00 UTCJul 5, 22:30 UTC30m
2026-07-05 LYM4802 - Jul 5, 20:45 UTCJul 5, 21:10 UTC25m
2026-07-05 LYM5414 - Jul 5, 16:30 UTCJul 5, 19:15 UTC2h 45m
2026-07-04 LYM5418 DEN → DFW Jul 4, 23:05 UTCJul 5, 15:35 UTC16h 30m
2026-07-04 LYM3585 - Jul 4, 20:10 UTCJul 4, 20:45 UTC35m
2026-07-04 LYM3583 - Jul 4, 18:45 UTCJul 4, 19:10 UTC25m
2026-07-04 LYM3581 - Jul 4, 14:10 UTCJul 4, 14:45 UTC35m
2026-07-03 LYM3587 - Jul 3, 23:45 UTCJul 4, 00:15 UTC30m
2026-07-03 LYM5414 - Jul 3, 16:25 UTCJul 3, 19:20 UTC2h 55m
2026-07-02 LYM5418 DEN → DFW Jul 2, 23:40 UTCJul 3, 15:25 UTC15h 45m
2026-07-02 LYM4803 PUB → DEN Jul 2, 22:10 UTCJul 2, 22:50 UTC40m
2026-07-02 LYM4802 DEN → PUB Jul 2, 21:05 UTCJul 2, 21:30 UTC25m
2026-07-02 LYM5414 - Jul 2, 16:35 UTCJul 2, 19:30 UTC2h 55m
2026-07-01 LYM5418 - Jul 1, 23:25 UTCJul 2, 15:35 UTC16h 10m
2026-07-01 LYM3585 - Jul 1, 20:35 UTCJul 1, 21:00 UTC25m
2026-07-01 LYM3583 - Jul 1, 19:05 UTCJul 1, 19:30 UTC25m
2026-07-01 LYM4803 PUB → DEN Jul 1, 00:10 UTCJul 1, 00:40 UTC30m
2026-06-30 LYM4802 - Jun 30, 20:50 UTCJun 30, 21:10 UTC20m
2026-06-30 LYM5414 - Jun 30, 18:30 UTCJun 30, 19:25 UTC55m

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 N971DC page for operator, model, and routing details .

Mode-S AD87AA frequently asked

What is Mode-S code AD87AA?
AD87AA is an ICAO 24-bit transponder address. Allocated to United States. Assigned to N971DC.
Where is Mode-S AD87AA registered?
Mode-S code AD87AA 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 AD87AA broadcasting right now?
Yes. Mode-S AD87AA is currently airborne.
Hex, octal, and decimal Mode-S codes: what's the difference?
The same 24-bit identifier expressed in different bases: hex AD87AA, octal 53303652, decimal 11,372,458.
What flights does AD87AA operate?
Mode-S AD87AA has broadcast 20 distinct callsigns, including LYM3585, LYM3583, LYM5418, LYM5414, LYM5407.