Apparatus

Try JFK, AAL1290, BAW, or N225AN.

sensors Mode-S transponder

A02681

ICAO 24-bit transponder address · allocated to United States

Currently assigned to N109DU · AIRBUS A220-100 · operated by BANK OF UTAH TRUSTEE

Hex
A02681
Octal
50023201
Decimal
10,495,617
Country
US
Tail
N109DU
Type
BCS1
No current signal · last broadcast Jul 26, 10:15 UTC
Flights observed
522
Distinct callsigns
20
Country
US
Last broadcast
Jul 26, 10:15 UTC

Last known position

Most recent position reported by Mode-S A02681.

Country allocation

The ICAO 24-bit address A02681 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
DAL2699 Delta Air Lines 26 2026-06-03
DAL2327 Delta Air Lines 14 2026-07-24
DAL2357 - 13 2026-07-11
DAL1533 - 11 2026-06-19
DAL1277 - 10 2026-06-27
DAL2307 - 9 2026-07-20
DAL2550 Delta Air Lines 8 2026-05-30
DAL2181 - 8 2026-07-18
DAL1357 Delta Air Lines 8 2026-07-18
DAL2969 - 7 2026-07-07
DAL920 Delta Air Lines 6 2026-04-25
DAL845 - 6 2026-06-19
DAL2963 Delta Air Lines 6 2026-06-12
DAL2847 Delta Air Lines 6 2026-07-24
DAL2819 - 6 2026-07-20
DAL2772 - 6 2026-07-16
DAL2688 - 6 2026-07-10
DAL2574 - 6 2026-07-08
DAL2245 Delta Air Lines 6 2026-05-17
DAL362 Delta Air Lines 5 2026-07-24

Recent flights last 50

DateFlightRouteTakeoffLandingDuration
2026-07-26 DAL2491 CLT → MSP Jul 26, 02:10 UTCJul 26, 04:35 UTC2h 25m
2026-07-25 DAL2929 MSP → CLT Jul 25, 01:20 UTCJul 25, 03:15 UTC1h 55m
2026-07-24 DAL362 LAX → OGG Jul 24, 17:50 UTCJul 24, 23:40 UTC5h 50m
2026-07-24 DAL2847 BNA → BOS Jul 24, 15:05 UTCJul 24, 16:40 UTC1h 35m
2026-07-24 DAL2327 ATL → CHA Jul 24, 12:35 UTCJul 24, 13:55 UTC1h 20m
2026-07-23 DAL2327 ATL → CHA Jul 23, 21:45 UTCJul 24, 00:25 UTC2h 40m
2026-07-23 DAL2327 ATL → CHA Jul 23, 18:10 UTCJul 23, 20:10 UTC2h 0m
2026-07-23 DAL535 JFK → LAX Jul 23, 14:35 UTCJul 23, 16:40 UTC2h 5m
2026-07-22 DAL730 JFK → LAS Jul 22, 23:15 UTCJul 23, 01:35 UTC2h 20m
2026-07-22 DAL2895 JFK → DEN Jul 22, 19:10 UTCJul 22, 21:45 UTC2h 35m
2026-07-22 DAL2895 JFK → DEN Jul 22, 19:09 UTCJul 22, 21:39 UTC2h 30m
2026-07-22 DAL2895 JFK → DEN Jul 22, 14:25 UTCJul 22, 16:25 UTC2h 0m
2026-07-22 DAL1717 BOS → LGA Jul 22, 11:45 UTCJul 22, 12:50 UTC1h 5m
2026-07-22 DAL1717 BOS → LGA Jul 22, 11:42 UTCJul 22, 12:46 UTC1h 4m
2026-07-22 DAL1563 BOS → MCO Jul 22, 01:40 UTCJul 22, 02:40 UTC1h 0m
2026-07-22 DAL1563 BOS → MCO Jul 22, 01:40 UTCJul 22, 02:30 UTC50m
2026-07-21 DAL362 - Jul 21, 18:05 UTCJul 22, 00:00 UTC5h 55m
2026-07-21 DAL2847 BNA → BOS Jul 21, 15:00 UTCJul 21, 16:35 UTC1h 35m
2026-07-21 DAL2847 BNA → BOS Jul 21, 12:15 UTCJul 21, 13:35 UTC1h 20m
2026-07-20 DAL2819 - Jul 20, 19:45 UTCJul 20, 22:05 UTC2h 20m
2026-07-20 DAL2819 - Jul 20, 15:40 UTCJul 20, 17:45 UTC2h 5m
2026-07-20 DAL2446 JFK → JAX Jul 20, 13:30 UTCJul 20, 14:15 UTC45m
2026-07-20 DAL2307 - Jul 20, 00:15 UTCJul 20, 01:10 UTC55m
2026-07-20 DAL2307 MSP → BIS Jul 20, 00:14 UTCJul 20, 01:15 UTC1h 1m
2026-07-19 DAL3113 - Jul 19, 21:35 UTCJul 19, 23:10 UTC1h 35m
2026-07-19 DAL3113 - Jul 19, 18:35 UTCJul 19, 19:55 UTC1h 20m
2026-07-19 DAL535 - Jul 19, 14:35 UTCJul 19, 16:45 UTC2h 10m
2026-07-18 DAL730 - Jul 18, 22:45 UTCJul 19, 00:50 UTC2h 5m
2026-07-18 DAL2181 - Jul 18, 17:30 UTCJul 18, 19:40 UTC2h 10m
2026-07-18 DAL2181 - Jul 18, 14:20 UTCJul 18, 16:10 UTC1h 50m
2026-07-18 DAL1357 BOS → JFK Jul 18, 10:10 UTCJul 18, 11:40 UTC1h 30m
2026-07-18 DAL1357 BOS → JFK Jul 18, 10:05 UTCJul 18, 11:38 UTC1h 33m
2026-07-18 DAL1392 DTW → MCO Jul 18, 02:14 UTCJul 18, 03:35 UTC1h 21m
2026-07-17 DAL1555 GRR → MSP Jul 17, 23:25 UTCJul 18, 00:29 UTC1h 5m
2026-07-17 DAL1555 MSP → GRR Jul 17, 21:15 UTCJul 17, 22:20 UTC1h 5m
2026-07-17 DAL2181 - Jul 17, 17:25 UTCJul 17, 19:20 UTC1h 55m
2026-07-17 DAL2181 - Jul 17, 14:04 UTCJul 17, 15:55 UTC1h 50m
2026-07-17 DAL2848 - Jul 17, 11:04 UTCJul 17, 12:55 UTC1h 50m
2026-07-17 DAL3075 - Jul 17, 01:25 UTCJul 17, 02:59 UTC1h 35m
2026-07-16 DAL362 - Jul 16, 17:54 UTCJul 17, 00:04 UTC6h 10m
2026-07-16 DAL2772 - Jul 16, 15:00 UTCJul 16, 16:35 UTC1h 35m
2026-07-16 DAL2772 MSP → CMH Jul 16, 12:34 UTCJul 16, 14:00 UTC1h 25m
2026-07-15 DAL2675 - Jul 15, 23:20 UTCJul 16, 01:40 UTC2h 20m
2026-07-15 DAL2680 - Jul 15, 19:50 UTCJul 15, 22:20 UTC2h 30m
2026-07-15 DAL1302 ONT → SLC Jul 15, 16:45 UTCJul 15, 18:05 UTC1h 20m
2026-07-15 DAL1302 ONT → SLC Jul 15, 16:44 UTCJul 15, 18:01 UTC1h 17m
2026-07-15 DAL1302 SLC → ONT Jul 15, 14:05 UTCJul 15, 15:25 UTC1h 20m
2026-07-15 DAL2335 - Jul 15, 12:20 UTCJul 15, 12:50 UTC30m
2026-07-15 DAL2608 - Jul 15, 03:40 UTCJul 15, 04:05 UTC25m
2026-07-15 DAL1342 - Jul 15, 00:10 UTCJul 15, 01:30 UTC1h 20m

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 N109DU page for operator, model, and routing details .

Mode-S A02681 frequently asked

What is Mode-S code A02681?
A02681 is an ICAO 24-bit transponder address. Allocated to United States. Assigned to N109DU.
Where is Mode-S A02681 registered?
Mode-S code A02681 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 A02681 broadcasting right now?
No active broadcast right now. Last signal was Jul 26, 10:15 UTC.
Hex, octal, and decimal Mode-S codes: what's the difference?
The same 24-bit identifier expressed in different bases: hex A02681, octal 50023201, decimal 10,495,617.
What flights does A02681 operate?
Mode-S A02681 has broadcast 20 distinct callsigns, including DAL2699, DAL2327, DAL2357, DAL1533, DAL1277.