Apparatus

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sensors Mode-S transponder

ADB071

ICAO 24-bit transponder address · allocated to United States

Currently assigned to N981SF · operated by ATP AIRCRAFT 1 LLC

Hex
ADB071
Octal
53330161
Decimal
11,382,897
Country
US
Tail
N981SF
Type
C172
No current signal · last broadcast 1d ago
Flights observed
57
Distinct callsigns
1
Country
US
Last broadcast
1d ago

Last known position

Most recent position reported by Mode-S ADB071.

Country allocation

The ICAO 24-bit address ADB071 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
CXK442 - 57 2026-06-01

Recent flights last 50

DateFlightRouteTakeoffLandingDuration
2026-06-01 CXK442 COS → COS Jun 1, 16:50 UTCJun 1, 17:55 UTC1h 5m
2026-05-30 CXK442 COS → COS May 30, 14:25 UTCMay 30, 16:55 UTC2h 30m
2026-05-29 CXK442 COS → COS May 29, 16:35 UTCMay 29, 17:15 UTC40m
2026-05-26 CXK442 COS → COS May 26, 14:05 UTCMay 26, 15:20 UTC1h 15m
2026-05-26 CXK442 COS → COS May 26, 11:15 UTCMay 26, 12:50 UTC1h 35m
2026-05-25 CXK442 COS → COS May 25, 13:55 UTCMay 25, 15:25 UTC1h 30m
2026-05-22 CXK442 COS → COS May 22, 14:05 UTCMay 22, 15:40 UTC1h 35m
2026-05-21 CXK442 COS → COS May 21, 17:45 UTCMay 21, 19:10 UTC1h 25m
2026-05-21 CXK442 COS → COS May 21, 14:20 UTCMay 21, 16:25 UTC2h 5m
2026-05-16 CXK442 COS → COS May 16, 14:11 UTCMay 16, 16:00 UTC1h 50m
2026-05-15 CXK442 COS → COS May 15, 14:15 UTCMay 15, 16:30 UTC2h 14m
2026-05-14 CXK442 - May 14, 12:30 UTCMay 14, 13:30 UTC1h 0m
2026-05-14 CXK442 COS → COS May 14, 12:15 UTCMay 14, 12:25 UTC10m
2026-05-14 CXK442 COS → COS May 14, 12:05 UTCMay 14, 12:10 UTC5m
2026-05-13 CXK442 COS → COS May 13, 17:15 UTCMay 13, 18:20 UTC1h 5m
2026-05-13 CXK442 COS → COS May 13, 12:25 UTCMay 13, 13:31 UTC1h 5m
2026-05-13 CXK442 COS → COS May 13, 12:00 UTCMay 13, 12:10 UTC10m
2026-05-12 CXK442 - May 12, 18:40 UTCMay 12, 19:50 UTC1h 10m
2026-05-12 CXK442 COS → COS May 12, 18:25 UTCMay 12, 18:35 UTC10m
2026-05-12 CXK442 - May 12, 13:05 UTCMay 12, 14:35 UTC1h 30m
2026-05-12 CXK442 - May 12, 12:50 UTCMay 12, 12:55 UTC5m
2026-05-12 CXK442 COS → COS May 12, 12:35 UTCMay 12, 12:45 UTC10m
2026-05-11 CXK442 COS → COS May 11, 16:20 UTCMay 11, 17:30 UTC1h 11m
2026-05-11 CXK442 COS → COS May 11, 16:00 UTCMay 11, 16:05 UTC5m
2026-05-09 CXK442 - May 9, 15:40 UTCMay 9, 17:15 UTC1h 35m
2026-05-09 CXK442 - May 9, 15:25 UTCMay 9, 15:30 UTC5m
2026-05-09 CXK442 COS → COS May 9, 15:10 UTCMay 9, 15:20 UTC10m
2026-05-09 CXK442 COS → COS May 9, 01:00 UTCMay 9, 02:05 UTC1h 5m
2026-05-08 CXK442 COS → COS May 8, 19:15 UTCMay 8, 20:15 UTC1h 0m
2026-05-07 CXK442 - May 7, 15:40 UTCMay 7, 16:55 UTC1h 15m
2026-05-07 CXK442 COS → COS May 7, 15:25 UTCMay 7, 15:30 UTC5m
2026-05-07 CXK442 - May 7, 15:10 UTCMay 7, 15:20 UTC10m
2026-05-07 CXK442 COS → COS May 7, 14:55 UTCMay 7, 15:00 UTC5m
2026-05-02 CXK442 COS → COS May 2, 15:35 UTCMay 2, 16:30 UTC55m
2026-05-01 CXK442 COS → COS May 1, 21:35 UTCMay 1, 22:30 UTC55m
2026-04-27 CXK442 COS → COS Apr 27, 16:45 UTCApr 27, 18:10 UTC1h 25m
2026-04-27 CXK442 COS → COS Apr 27, 14:25 UTCApr 27, 15:50 UTC1h 25m
2026-04-24 CXK442 - Apr 24, 14:45 UTCApr 24, 16:00 UTC1h 15m
2026-04-24 CXK442 COS → COS Apr 24, 14:30 UTCApr 24, 14:40 UTC10m
2026-04-24 CXK442 COS → COS Apr 24, 11:40 UTCApr 24, 12:50 UTC1h 10m
2026-04-23 CXK442 COS → COS Apr 23, 12:35 UTCApr 23, 13:15 UTC40m
2026-04-22 CXK442 COS → COS Apr 22, 11:50 UTCApr 22, 13:20 UTC1h 30m
2026-04-21 CXK442 COS → COS Apr 21, 15:05 UTCApr 21, 16:25 UTC1h 20m
2026-04-21 CXK442 - Apr 21, 12:40 UTCApr 21, 13:25 UTC45m
2026-04-21 CXK442 COS → BJC Apr 21, 11:50 UTCApr 21, 12:35 UTC45m
2026-04-20 CXK442 COS → COS Apr 20, 15:15 UTCApr 20, 17:00 UTC1h 45m
2026-04-20 CXK442 - Apr 20, 11:55 UTCApr 20, 13:30 UTC1h 35m
2026-04-18 CXK442 APA → APA Apr 18, 12:30 UTCApr 18, 14:25 UTC1h 55m
2026-04-16 CXK442 - Apr 16, 15:15 UTCApr 16, 15:35 UTC20m
2026-04-16 CXK442 - Apr 16, 15:00 UTCApr 16, 15:10 UTC10m

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 N981SF page for operator, model, and routing details .

Mode-S ADB071 frequently asked

What is Mode-S code ADB071?
ADB071 is an ICAO 24-bit transponder address. Allocated to United States. Assigned to N981SF.
Where is Mode-S ADB071 registered?
Mode-S code ADB071 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 ADB071 broadcasting right now?
No active broadcast right now. Last signal was 1d ago.
Hex, octal, and decimal Mode-S codes: what's the difference?
The same 24-bit identifier expressed in different bases: hex ADB071, octal 53330161, decimal 11,382,897.
What flights does ADB071 operate?
Mode-S ADB071 has broadcast 1 distinct callsign, including CXK442.