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 8h ago
Flights observed
471
Distinct callsigns
20
Country
US
Last broadcast
8h ago

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
DAL2357 - 13 2026-07-11
DAL2327 Delta Air Lines 11 2026-06-05
DAL1533 - 11 2026-06-19
DAL1277 - 10 2026-06-27
DAL2550 Delta Air Lines 8 2026-05-30
DAL2969 - 7 2026-07-07
DAL2307 Delta Air Lines 7 2026-06-04
DAL920 Delta Air Lines 6 2026-04-25
DAL845 - 6 2026-06-19
DAL2963 Delta Air Lines 6 2026-06-12
DAL2688 - 6 2026-07-10
DAL2574 - 6 2026-07-08
DAL2245 Delta Air Lines 6 2026-05-17
DAL1357 Delta Air Lines 6 2026-05-28
DAL2972 Delta Air Lines 5 2026-05-22
DAL2580 - 5 2026-07-13
DAL2113 Delta Air Lines 5 2026-06-14
DAL2095 Delta Air Lines 5 2026-05-01
DAL1471 Delta Air Lines 5 2026-05-22

Recent flights last 50

DateFlightRouteTakeoffLandingDuration
2026-07-14 DAL2795 - Jul 14, 11:50 UTCJul 14, 12:50 UTC1h 0m
2026-07-14 DAL1723 - Jul 14, 05:15 UTCJul 14, 05:45 UTC30m
2026-07-14 DAL2685 - Jul 14, 00:20 UTCJul 14, 02:45 UTC2h 25m
2026-07-13 DAL2580 - Jul 13, 21:10 UTCJul 13, 23:20 UTC2h 10m
2026-07-13 DAL1827 - Jul 13, 16:05 UTCJul 13, 18:00 UTC1h 55m
2026-07-13 DAL1827 - Jul 13, 12:10 UTCJul 13, 14:20 UTC2h 10m
2026-07-12 DAL2061 - Jul 12, 20:30 UTCJul 12, 23:50 UTC3h 20m
2026-07-12 DAL1835 - Jul 12, 17:15 UTCJul 12, 18:45 UTC1h 30m
2026-07-12 DAL1583 - Jul 12, 13:01 UTCJul 12, 15:40 UTC2h 40m
2026-07-11 DAL2683 - Jul 11, 23:50 UTCJul 12, 02:10 UTC2h 20m
2026-07-11 DAL2357 BWI → MSP Jul 11, 19:15 UTCJul 11, 21:25 UTC2h 10m
2026-07-11 DAL2357 MSP → BWI Jul 11, 15:45 UTCJul 11, 17:50 UTC2h 5m
2026-07-11 DAL2594 - Jul 11, 03:15 UTCJul 11, 05:45 UTC2h 30m
2026-07-11 DAL2594 PHL → MSP Jul 11, 03:15 UTCJul 11, 05:34 UTC2h 19m
2026-07-10 DAL2594 MSP → PHL Jul 10, 23:50 UTCJul 11, 02:00 UTC2h 10m
2026-07-10 DAL2688 - Jul 10, 15:55 UTCJul 10, 18:25 UTC2h 30m
2026-07-10 DAL2688 PHL → MSP Jul 10, 15:53 UTCJul 10, 18:25 UTC2h 32m
2026-07-10 DAL2688 MSP → PHL Jul 10, 12:30 UTCJul 10, 14:30 UTC2h 0m
2026-07-09 DAL1449 - Jul 9, 23:35 UTCJul 10, 01:10 UTC1h 35m
2026-07-09 DAL1449 - Jul 9, 20:55 UTCJul 9, 22:25 UTC1h 30m
2026-07-09 DAL2181 - Jul 9, 17:15 UTCJul 9, 19:15 UTC2h 0m
2026-07-09 DAL2181 - Jul 9, 14:10 UTCJul 9, 16:05 UTC1h 55m
2026-07-09 DAL1641 - Jul 9, 10:25 UTCJul 9, 12:45 UTC2h 20m
2026-07-09 DAL1641 EWR → MSP Jul 9, 10:22 UTCJul 9, 12:43 UTC2h 21m
2026-07-09 DAL2846 MSP → EWR Jul 9, 01:35 UTCJul 9, 03:45 UTC2h 10m
2026-07-08 DAL2574 - Jul 8, 21:30 UTCJul 9, 00:20 UTC2h 50m
2026-07-08 DAL2574 - Jul 8, 17:55 UTCJul 8, 20:20 UTC2h 25m
2026-07-08 DAL2390 JFK → MSP Jul 8, 11:40 UTCJul 8, 14:05 UTC2h 25m
2026-07-08 DAL1638 - Jul 8, 00:10 UTCJul 8, 03:30 UTC3h 20m
2026-07-07 DAL1638 - Jul 7, 20:20 UTCJul 7, 22:35 UTC2h 15m
2026-07-07 DAL2969 MSP → JFK Jul 7, 12:15 UTCJul 7, 14:25 UTC2h 10m
2026-07-07 DAL2969 MSP → JFK Jul 7, 12:10 UTCJul 7, 14:30 UTC2h 20m
2026-07-07 DAL2130 - Jul 7, 03:25 UTCJul 7, 04:20 UTC55m
2026-07-07 DAL2130 STP → ORD Jul 7, 00:30 UTCJul 7, 01:45 UTC1h 15m
2026-07-06 DAL2819 ALB → ATL Jul 6, 21:15 UTCJul 6, 23:30 UTC2h 15m
2026-07-06 DAL2819 ALB → ATL Jul 6, 15:45 UTCJul 6, 17:50 UTC2h 5m
2026-07-06 DAL1050 - Jul 6, 11:45 UTCJul 6, 14:05 UTC2h 20m
2026-06-30 DAL2514 - Jun 30, 23:55 UTCJul 1, 02:30 UTC2h 35m
2026-06-30 DAL2455 - Jun 30, 19:35 UTCJun 30, 22:20 UTC2h 45m
2026-06-30 DAL2455 SLC → STL Jun 30, 15:55 UTCJun 30, 18:20 UTC2h 25m
2026-06-30 DAL1314 SJC → SLC Jun 30, 13:00 UTCJun 30, 14:30 UTC1h 30m
2026-06-30 DAL2087 MSP → SJC Jun 30, 00:30 UTCJun 30, 04:15 UTC3h 46m
2026-06-29 DAL2057 DTW → MYR Jun 29, 20:54 UTCJun 29, 22:35 UTC1h 40m
2026-06-29 DAL2057 DTW → MYR Jun 29, 17:59 UTCJun 29, 19:20 UTC1h 20m
2026-06-28 DAL2866 MSP → TPA Jun 28, 23:14 UTCJun 29, 01:39 UTC2h 25m
2026-06-28 DAL2866 MSP → TPA Jun 28, 19:40 UTCJun 28, 21:55 UTC2h 15m
2026-06-28 DAL2456 MIA → LGA Jun 28, 16:49 UTCJun 28, 18:19 UTC1h 30m
2026-06-28 DAL2456 MIA → LGA Jun 28, 14:39 UTCJun 28, 15:44 UTC1h 5m
2026-06-28 DAL1597 - Jun 28, 11:25 UTCJun 28, 12:35 UTC1h 10m
2026-06-27 DAL2666 - Jun 27, 23:25 UTCJun 28, 01:34 UTC2h 10m

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 8h ago.
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, DAL2357, DAL2327, DAL1533, DAL1277.