Apparatus

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sensors Mode-S transponder

A066A3

ICAO 24-bit transponder address · allocated to United States

Currently assigned to N125DU · AIRBUS A220-100 · operated by BANK OF UTAH TRUSTEE

Hex
A066A3
Octal
50063243
Decimal
10,512,035
Country
US
Tail
N125DU
Type
BCS1
No current signal · last broadcast Jul 26, 22:45 UTC
Flights observed
544
Distinct callsigns
20
Country
US
Last broadcast
Jul 26, 22:45 UTC

Last known position

Most recent position reported by Mode-S A066A3.

Country allocation

The ICAO 24-bit address A066A3 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
DAL1553 - 17 2026-07-09
DAL2656 - 15 2026-07-04
DAL1024 Delta Air Lines 15 2026-07-23
DAL1471 Delta Air Lines 12 2026-05-10
DAL1492 Delta Air Lines 11 2026-07-26
DAL1254 Delta Air Lines 11 2026-07-18
DAL1260 - 10 2026-07-07
DAL2798 Delta Air Lines 9 2026-07-26
DAL2455 - 9 2026-07-02
DAL1503 - 9 2026-07-02
DAL1367 - 9 2026-07-13
DAL1198 - 9 2026-07-21
DAL2285 - 8 2026-06-21
DAL2156 - 8 2026-07-11
DAL1614 Delta Air Lines 8 2026-07-19
DAL1582 Delta Air Lines 8 2026-07-25
DAL1272 - 8 2026-07-08
DAL2971 Delta Air Lines 7 2026-05-06
DAL2813 - 7 2026-07-19
DAL2708 - 7 2026-07-19

Recent flights last 50

DateFlightRouteTakeoffLandingDuration
2026-07-26 DAL1492 JFK → DEN Jul 26, 21:20 UTCJul 26, 22:45 UTC1h 25m
2026-07-26 DAL2798 EWR → MSP Jul 26, 17:50 UTCJul 26, 19:55 UTC2h 5m
2026-07-26 DAL2798 EWR → MSP Jul 26, 14:20 UTCJul 26, 16:30 UTC2h 10m
2026-07-26 DAL2335 SLC → CVG Jul 26, 12:20 UTCJul 26, 12:50 UTC30m
2026-07-26 DAL2608 MSP → PHL Jul 26, 05:20 UTCJul 26, 05:54 UTC34m
2026-07-26 DAL2608 MSP → PHL Jul 26, 05:20 UTCJul 26, 05:45 UTC25m
2026-07-26 DAL1277 SNA → SLC Jul 26, 02:45 UTCJul 26, 04:05 UTC1h 20m
2026-07-26 DAL1277 SNA → SLC Jul 26, 02:40 UTCJul 26, 04:06 UTC1h 26m
2026-07-26 DAL1277 SNA → SLC Jul 26, 00:10 UTCJul 26, 01:40 UTC1h 30m
2026-07-25 DAL3172 ATL → MDT Jul 25, 20:20 UTCJul 25, 21:35 UTC1h 15m
2026-07-25 DAL3172 ATL → MDT Jul 25, 17:35 UTCJul 25, 19:00 UTC1h 25m
2026-07-25 DAL1526 ATL → DTW Jul 25, 12:40 UTCJul 25, 13:55 UTC1h 15m
2026-07-25 DAL1582 MSP → CHS Jul 25, 05:55 UTCJul 25, 07:15 UTC1h 20m
2026-07-25 DAL1582 MSP → CHS Jul 25, 05:55 UTCJul 25, 07:13 UTC1h 18m
2026-07-25 DAL1342 IAH → MSP Jul 25, 00:10 UTCJul 25, 01:30 UTC1h 20m
2026-07-24 DAL1342 IAH → MSP Jul 24, 21:40 UTCJul 24, 23:00 UTC1h 20m
2026-07-24 DAL2798 EWR → MSP Jul 24, 17:45 UTCJul 24, 20:00 UTC2h 15m
2026-07-24 DAL2798 EWR → MSP Jul 24, 14:10 UTCJul 24, 16:15 UTC2h 5m
2026-07-24 DAL1299 LGA → SRQ Jul 24, 00:50 UTCJul 24, 03:30 UTC2h 40m
2026-07-23 DAL1299 LGA → SRQ Jul 23, 20:10 UTCJul 23, 22:45 UTC2h 35m
2026-07-23 DAL1024 ATL → CHA Jul 23, 02:20 UTCJul 23, 03:40 UTC1h 20m
2026-07-22 DAL1024 ATL → CHA Jul 22, 23:55 UTCJul 23, 01:05 UTC1h 10m
2026-07-22 DAL1532 - Jul 22, 19:40 UTCJul 22, 22:10 UTC2h 30m
2026-07-22 DAL2502 ATL → BNA Jul 22, 15:40 UTCJul 22, 18:20 UTC2h 40m
2026-07-22 DAL1526 ATL → DTW Jul 22, 13:10 UTCJul 22, 14:25 UTC1h 15m
2026-07-22 DAL1582 MSP → CHS Jul 22, 05:15 UTCJul 22, 05:25 UTC10m
2026-07-22 DAL1492 JFK → DEN Jul 22, 01:00 UTCJul 22, 04:00 UTC3h 0m
2026-07-22 DAL1492 JFK → DEN Jul 22, 00:55 UTCJul 22, 03:54 UTC2h 59m
2026-07-21 DAL1492 JFK → DEN Jul 21, 21:30 UTCJul 21, 23:55 UTC2h 25m
2026-07-21 DAL1198 - Jul 21, 16:50 UTCJul 21, 18:20 UTC1h 30m
2026-07-21 DAL1198 - Jul 21, 14:15 UTCJul 21, 15:40 UTC1h 25m
2026-07-21 DAL2795 ATL → MCI Jul 21, 11:55 UTCJul 21, 12:55 UTC1h 0m
2026-07-21 DAL2795 ATL → MCI Jul 21, 11:44 UTCJul 21, 12:48 UTC1h 4m
2026-07-21 DAL1723 LAX → PDX Jul 21, 05:05 UTCJul 21, 05:40 UTC35m
2026-07-21 DAL1723 LAX → PDX Jul 21, 05:05 UTCJul 21, 06:09 UTC1h 4m
2026-07-21 DAL2585 CVG → ATL Jul 21, 02:20 UTCJul 21, 03:45 UTC1h 25m
2026-07-21 DAL2585 CVG → ATL Jul 21, 00:00 UTCJul 21, 01:15 UTC1h 15m
2026-07-20 DAL1532 - Jul 20, 19:40 UTCJul 20, 22:10 UTC2h 30m
2026-07-20 DAL2502 ATL → BNA Jul 20, 15:35 UTCJul 20, 18:20 UTC2h 45m
2026-07-20 DAL1526 ATL → DTW Jul 20, 12:35 UTCJul 20, 13:55 UTC1h 20m
2026-07-20 DAL1582 MSP → CHS Jul 20, 05:15 UTCJul 20, 06:30 UTC1h 15m
2026-07-20 DAL1582 MSP → CHS Jul 20, 05:13 UTCJul 20, 06:28 UTC1h 15m
2026-07-20 DAL1492 - Jul 20, 01:00 UTCJul 20, 03:45 UTC2h 45m
2026-07-19 DAL1492 SLC → STL Jul 19, 21:30 UTCJul 19, 23:55 UTC2h 25m
2026-07-19 DAL2813 - Jul 19, 18:55 UTCJul 19, 20:00 UTC1h 5m
2026-07-19 DAL2813 - Jul 19, 16:15 UTCJul 19, 17:30 UTC1h 15m
2026-07-19 DAL2708 - Jul 19, 13:10 UTCJul 19, 14:35 UTC1h 25m
2026-07-19 DAL1614 LGA → MIA Jul 19, 04:50 UTCJul 19, 06:10 UTC1h 20m
2026-07-18 DAL1254 ATL → PVD Jul 18, 20:40 UTCJul 18, 22:05 UTC1h 25m
2026-07-18 DAL1254 ATL → PVD Jul 18, 18:00 UTCJul 18, 19:30 UTC1h 30m

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 N125DU page for operator, model, and routing details .

Mode-S A066A3 frequently asked

What is Mode-S code A066A3?
A066A3 is an ICAO 24-bit transponder address. Allocated to United States. Assigned to N125DU.
Where is Mode-S A066A3 registered?
Mode-S code A066A3 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 A066A3 broadcasting right now?
No active broadcast right now. Last signal was Jul 26, 22:45 UTC.
Hex, octal, and decimal Mode-S codes: what's the difference?
The same 24-bit identifier expressed in different bases: hex A066A3, octal 50063243, decimal 10,512,035.
What flights does A066A3 operate?
Mode-S A066A3 has broadcast 20 distinct callsigns, including DAL1553, DAL2656, DAL1024, DAL1471, DAL1492.