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sensors Mode-S transponder

ADC7AA

ICAO 24-bit transponder address · allocated to United States

Currently assigned to N9871K · operated by BEVERLY FLIGHT CENTER LLC

Hex
ADC7AA
Octal
53343652
Decimal
11,388,842
Country
US
Tail
N9871K
Type
P28A
No current signal · last broadcast 4d ago
Flights observed
170
Distinct callsigns
1
Country
US
Last broadcast
4d ago

Last known position

Most recent position reported by Mode-S ADC7AA.

Country allocation

The ICAO 24-bit address ADC7AA 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 1 distinct

Callsign Airline Flights Last seen
N9871K - 170 2026-07-10

Recent flights last 50

DateFlightRouteTakeoffLandingDuration
2026-07-10 N9871K - Jul 10, 14:10 UTCJul 10, 14:30 UTC20m
2026-07-10 N9871K - Jul 10, 12:55 UTCJul 10, 13:35 UTC40m
2026-07-09 N9871K BVY → BVY Jul 9, 20:40 UTCJul 9, 21:15 UTC35m
2026-07-09 N9871K - Jul 9, 17:25 UTCJul 9, 17:55 UTC30m
2026-07-09 N9871K - Jul 9, 13:45 UTCJul 9, 14:45 UTC1h 0m
2026-07-08 N9871K BVY → BVY Jul 8, 15:10 UTCJul 8, 15:50 UTC40m
2026-07-08 N9871K - Jul 8, 12:45 UTCJul 8, 13:45 UTC1h 0m
2026-07-06 N9871K - Jul 6, 21:55 UTCJul 6, 23:25 UTC1h 30m
2026-07-06 N9871K BVY → BVY Jul 6, 18:50 UTCJul 6, 19:50 UTC1h 0m
2026-07-06 N9871K - Jul 6, 16:45 UTCJul 6, 17:45 UTC1h 0m
2026-07-06 N9871K - Jul 6, 15:45 UTCJul 6, 16:00 UTC15m
2026-07-06 N9871K - Jul 6, 13:30 UTCJul 6, 14:10 UTC40m
2026-07-05 N9871K - Jul 5, 22:05 UTCJul 5, 23:50 UTC1h 45m
2026-07-05 N9871K - Jul 5, 17:15 UTCJul 5, 17:55 UTC40m
2026-07-05 N9871K - Jul 5, 15:45 UTCJul 5, 16:15 UTC30m
2026-07-05 N9871K - Jul 5, 13:30 UTCJul 5, 14:20 UTC50m
2026-07-03 N9871K - Jul 3, 12:45 UTCJul 3, 13:45 UTC1h 0m
2026-07-02 N9871K - Jul 2, 15:25 UTCJul 2, 16:20 UTC55m
2026-07-01 N9871K - Jul 1, 21:35 UTCJul 1, 22:30 UTC55m
2026-07-01 N9871K BVY → BVY Jul 1, 19:05 UTCJul 1, 20:00 UTC55m
2026-07-01 N9871K - Jul 1, 16:40 UTCJul 1, 17:30 UTC50m
2026-07-01 N9871K BVY → BVY Jul 1, 14:50 UTCJul 1, 15:45 UTC55m
2026-07-01 N9871K - Jul 1, 13:10 UTCJul 1, 13:35 UTC25m
2026-06-30 N9871K - Jun 30, 17:45 UTCJun 30, 18:20 UTC35m
2026-06-30 N9871K - Jun 30, 15:40 UTCJun 30, 16:45 UTC1h 5m
2026-06-29 N9871K BVY → BVY Jun 29, 19:49 UTCJun 29, 20:44 UTC55m
2026-06-29 N9871K - Jun 29, 16:35 UTCJun 29, 18:05 UTC1h 30m
2026-06-29 N9871K - Jun 29, 14:54 UTCJun 29, 15:19 UTC25m
2026-06-29 N9871K - Jun 29, 13:44 UTCJun 29, 14:19 UTC35m
2026-06-28 N9871K - Jun 28, 17:55 UTCJun 28, 18:59 UTC1h 5m
2026-06-28 N9871K BVY → BVY Jun 28, 16:39 UTCJun 28, 17:10 UTC30m
2026-06-27 N9871K - Jun 27, 20:09 UTCJun 27, 20:44 UTC35m
2026-06-27 N9871K BVY → BVY Jun 27, 17:49 UTCJun 27, 18:54 UTC1h 5m
2026-06-27 N9871K - Jun 27, 16:04 UTCJun 27, 16:55 UTC50m
2026-06-26 N9871K - Jun 26, 21:15 UTCJun 26, 21:55 UTC40m
2026-06-25 N9871K BVY → BVY Jun 25, 14:34 UTCJun 25, 14:50 UTC15m
2026-06-24 N9871K - Jun 24, 18:44 UTCJun 24, 19:34 UTC50m
2026-06-24 N9871K BVY → BVY Jun 24, 14:39 UTCJun 24, 15:24 UTC45m
2026-06-22 N9871K BVY → BVY Jun 22, 15:40 UTCJun 22, 16:24 UTC45m
2026-06-22 N9871K BVY → BVY Jun 22, 14:10 UTCJun 22, 14:59 UTC50m
2026-06-21 N9871K BVY → BVY Jun 21, 18:25 UTCJun 21, 19:09 UTC45m
2026-06-19 N9871K BVY → BVY Jun 19, 12:49 UTCJun 19, 13:14 UTC25m
2026-06-17 N9871K - Jun 17, 21:10 UTCJun 17, 21:50 UTC40m
2026-06-17 N9871K - Jun 17, 17:50 UTCJun 17, 18:40 UTC50m
2026-06-17 N9871K - Jun 17, 16:10 UTCJun 17, 16:50 UTC40m
2026-06-17 N9871K BVY → BVY Jun 17, 14:00 UTCJun 17, 15:00 UTC1h 0m
2026-06-16 N9871K - Jun 16, 17:45 UTCJun 16, 18:45 UTC1h 0m
2026-06-16 N9871K - Jun 16, 14:55 UTCJun 16, 15:55 UTC1h 0m
2026-06-16 N9871K BVY → BVY Jun 16, 13:04 UTCJun 16, 13:44 UTC40m
2026-06-15 N9871K - Jun 15, 15:45 UTCJun 15, 16:45 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 N9871K page for operator, model, and routing details .

Mode-S ADC7AA frequently asked

What is Mode-S code ADC7AA?
ADC7AA is an ICAO 24-bit transponder address. Allocated to United States. Assigned to N9871K.
Where is Mode-S ADC7AA registered?
Mode-S code ADC7AA 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 ADC7AA broadcasting right now?
No active broadcast right now. Last signal was 4d ago.
Hex, octal, and decimal Mode-S codes: what's the difference?
The same 24-bit identifier expressed in different bases: hex ADC7AA, octal 53343652, decimal 11,388,842.
What flights does ADC7AA operate?
Mode-S ADC7AA has broadcast 1 distinct callsign, including N9871K.