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sensors Mode-S transponder

AB681A

ICAO 24-bit transponder address · allocated to United States

Currently assigned to N834KC · DIAMOND DA-40 Club Star · operated by ECHO PAPA AVIATION LLC

Hex
AB681A
Octal
52664032
Decimal
11,233,306
Country
US
Tail
N834KC
Type
DA40
No current signal · last broadcast 4h ago
Flights observed
212
Distinct callsigns
1
Country
US
Last broadcast
4h ago

Last known position

Most recent position reported by Mode-S AB681A.

Country allocation

The ICAO 24-bit address AB681A 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
N834KC - 212 2026-07-14

Recent flights last 50

DateFlightRouteTakeoffLandingDuration
2026-07-14 N834KC - Jul 14, 01:10 UTCJul 14, 02:10 UTC1h 0m
2026-07-13 N834KC - Jul 13, 15:55 UTCJul 13, 16:15 UTC20m
2026-07-13 N834KC - Jul 13, 11:30 UTCJul 13, 13:45 UTC2h 15m
2026-07-12 N834KC - Jul 12, 17:40 UTCJul 12, 18:55 UTC1h 15m
2026-07-11 N834KC - Jul 11, 16:50 UTCJul 11, 17:40 UTC50m
2026-07-10 N834KC - Jul 10, 01:25 UTCJul 10, 02:40 UTC1h 15m
2026-07-09 N834KC - Jul 9, 23:40 UTCJul 10, 00:35 UTC55m
2026-07-09 N834KC - Jul 9, 17:35 UTCJul 9, 18:00 UTC25m
2026-07-09 N834KC - Jul 9, 16:10 UTCJul 9, 16:55 UTC45m
2026-07-09 N834KC - Jul 9, 14:50 UTCJul 9, 15:20 UTC30m
2026-07-09 N834KC - Jul 9, 12:45 UTCJul 9, 13:05 UTC20m
2026-07-08 N834KC - Jul 8, 23:45 UTCJul 9, 00:00 UTC15m
2026-07-08 N834KC - Jul 8, 18:45 UTCJul 8, 18:55 UTC10m
2026-07-08 N834KC - Jul 8, 14:45 UTCJul 8, 15:00 UTC15m
2026-07-08 N834KC - Jul 8, 13:45 UTCJul 8, 14:05 UTC20m
2026-07-07 N834KC - Jul 7, 23:45 UTCJul 8, 00:40 UTC55m
2026-07-07 N834KC - Jul 7, 19:35 UTCJul 7, 20:30 UTC55m
2026-07-06 N834KC - Jul 6, 23:40 UTCJul 7, 00:25 UTC45m
2026-07-06 N834KC - Jul 6, 13:30 UTCJul 6, 14:45 UTC1h 15m
2026-07-05 N834KC - Jul 5, 14:35 UTCJul 5, 14:45 UTC10m
2026-07-05 N834KC - Jul 5, 12:35 UTCJul 5, 13:10 UTC35m
2026-07-05 N834KC - Jul 5, 11:25 UTCJul 5, 11:45 UTC20m
2026-07-04 N834KC - Jul 4, 13:35 UTCJul 4, 13:50 UTC15m
2026-07-03 N834KC - Jul 3, 18:35 UTCJul 3, 18:45 UTC10m
2026-07-02 N834KC - Jul 2, 22:50 UTCJul 3, 00:15 UTC1h 25m
2026-07-02 N834KC - Jul 2, 19:05 UTCJul 2, 20:20 UTC1h 15m
2026-07-01 N834KC - Jul 1, 18:40 UTCJul 1, 19:50 UTC1h 10m
2026-06-30 N834KC - Jun 30, 20:25 UTCJun 30, 21:55 UTC1h 30m
2026-06-30 N834KC - Jun 30, 17:55 UTCJun 30, 18:55 UTC1h 0m
2026-06-29 N834KC - Jun 29, 23:44 UTCJun 30, 01:09 UTC1h 25m
2026-06-29 N834KC - Jun 29, 19:39 UTCJun 29, 20:49 UTC1h 10m
2026-06-29 N834KC - Jun 29, 15:54 UTCJun 29, 16:39 UTC45m
2026-06-29 N834KC - Jun 29, 14:39 UTCJun 29, 14:54 UTC15m
2026-06-29 N834KC - Jun 29, 13:44 UTCJun 29, 13:54 UTC10m
2026-06-27 N834KC - Jun 27, 14:20 UTCJun 27, 14:39 UTC20m
2026-06-27 N834KC - Jun 27, 11:39 UTCJun 27, 12:50 UTC1h 10m
2026-06-26 N834KC - Jun 26, 23:04 UTCJun 26, 23:30 UTC25m
2026-06-26 N834KC - Jun 26, 21:50 UTCJun 26, 22:14 UTC25m
2026-06-26 N834KC - Jun 26, 20:10 UTCJun 26, 20:44 UTC35m
2026-06-26 N834KC - Jun 26, 18:54 UTCJun 26, 19:24 UTC30m
2026-06-26 N834KC - Jun 26, 15:39 UTCJun 26, 16:00 UTC20m
2026-06-23 N834KC - Jun 23, 17:50 UTCJun 23, 18:39 UTC50m
2026-06-22 N834KC - Jun 22, 15:50 UTCJun 22, 16:40 UTC50m
2026-06-22 N834KC - Jun 22, 14:19 UTCJun 22, 14:45 UTC25m
2026-06-21 N834KC - Jun 21, 22:24 UTCJun 21, 23:24 UTC1h 0m
2026-06-21 N834KC - Jun 21, 13:34 UTCJun 21, 14:50 UTC1h 15m
2026-06-20 N834KC - Jun 20, 19:15 UTCJun 20, 19:24 UTC10m
2026-06-20 N834KC - Jun 20, 17:34 UTCJun 20, 18:10 UTC35m
2026-06-20 N834KC - Jun 20, 15:39 UTCJun 20, 16:44 UTC1h 5m
2026-06-20 N834KC - Jun 20, 14:44 UTCJun 20, 14:54 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 N834KC page for operator, model, and routing details .

Mode-S AB681A frequently asked

What is Mode-S code AB681A?
AB681A is an ICAO 24-bit transponder address. Allocated to United States. Assigned to N834KC.
Where is Mode-S AB681A registered?
Mode-S code AB681A 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 AB681A broadcasting right now?
No active broadcast right now. Last signal was 4h ago.
Hex, octal, and decimal Mode-S codes: what's the difference?
The same 24-bit identifier expressed in different bases: hex AB681A, octal 52664032, decimal 11,233,306.
What flights does AB681A operate?
Mode-S AB681A has broadcast 1 distinct callsign, including N834KC.