Apparatus

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sensors Mode-S transponder

A0AA7C

ICAO 24-bit transponder address · allocated to United States

Currently assigned to N142DU · AIRBUS A220-100 · operated by DELTA AIR LINES INC

Hex
A0AA7C
Octal
50125174
Decimal
10,529,404
Country
US
Tail
N142DU
Type
BCS1
Transponder active on ground
Flights observed
482
Distinct callsigns
20
Country
US
Last broadcast
Jul 26, 22:15 UTC

Last known position

Most recent position reported by Mode-S A0AA7C.

Country allocation

The ICAO 24-bit address A0AA7C 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
DAL2574 - 13 2026-07-15
DAL1533 - 12 2026-07-18
DAL2327 Delta Air Lines 11 2026-05-15
DAL2285 - 10 2026-06-25
DAL1277 - 10 2026-06-14
DAL2847 - 9 2026-07-01
DAL496 Delta Air Lines 8 2026-07-25
DAL1035 Delta Air Lines 8 2026-07-26
DAL454 Delta Air Lines 7 2026-07-25
DAL2920 Delta Air Lines 7 2026-05-24
DAL2866 Delta Air Lines 7 2026-07-01
DAL2661 Delta Air Lines 7 2026-07-23
DAL2414 - 7 2026-07-03
DAL1116 Delta Air Lines 7 2026-05-23
DAL416 Delta Air Lines 6 2026-05-05
DAL2969 - 6 2026-07-03
DAL2895 - 6 2026-06-19
DAL2455 - 6 2026-07-19
DAL2156 Delta Air Lines 6 2026-07-22
DAL762 Delta Air Lines 5 2026-07-22

Recent flights last 50

DateFlightRouteTakeoffLandingDuration
2026-07-26 DAL2443 SLC → SFO Jul 26, 20:50 UTCJul 26, 22:15 UTC1h 25m
2026-07-26 DAL2320 AUS → MSP Jul 26, 16:25 UTCJul 26, 18:55 UTC2h 30m
2026-07-26 DAL2320 AUS → MSP Jul 26, 12:35 UTCJul 26, 15:00 UTC2h 25m
2026-07-26 DAL1035 BOS → JFK Jul 26, 00:20 UTCJul 26, 02:10 UTC1h 50m
2026-07-25 DAL1035 BOS → JFK Jul 25, 18:10 UTCJul 25, 20:05 UTC1h 55m
2026-07-25 DAL454 LAX → BOS Jul 25, 13:22 UTCJul 25, 16:31 UTC3h 9m
2026-07-25 DAL454 LAX → BOS Jul 25, 13:25 UTCJul 25, 16:35 UTC3h 10m
2026-07-25 DAL496 JFK → DFW Jul 25, 01:50 UTCJul 25, 04:50 UTC3h 0m
2026-07-24 DAL1035 BOS → JFK Jul 24, 22:00 UTCJul 24, 23:55 UTC1h 55m
2026-07-24 DAL1035 BOS → JFK Jul 24, 18:15 UTCJul 24, 20:10 UTC1h 55m
2026-07-24 DAL454 LAX → BOS Jul 24, 13:25 UTCJul 24, 16:30 UTC3h 5m
2026-07-23 DAL496 JFK → DFW Jul 23, 22:35 UTCJul 24, 01:35 UTC3h 0m
2026-07-23 DAL2661 LEX → ATL Jul 23, 18:15 UTCJul 23, 20:20 UTC2h 5m
2026-07-23 DAL2661 LEX → ATL Jul 23, 18:12 UTCJul 23, 20:22 UTC2h 10m
2026-07-23 DAL2622 CVG → ATL Jul 23, 14:20 UTCJul 23, 16:40 UTC2h 20m
2026-07-22 DAL762 PDX → ATL Jul 22, 23:35 UTCJul 23, 02:30 UTC2h 55m
2026-07-22 DAL3113 MSP → CVG Jul 22, 20:35 UTCJul 22, 22:15 UTC1h 40m
2026-07-22 DAL3113 MSP → CVG Jul 22, 20:33 UTCJul 22, 22:06 UTC1h 33m
2026-07-22 DAL3113 MSP → CVG Jul 22, 18:00 UTCJul 22, 19:15 UTC1h 15m
2026-07-22 DAL2156 BOS → MSP Jul 22, 13:25 UTCJul 22, 16:45 UTC3h 20m
2026-07-22 DAL2156 BOS → MSP Jul 22, 13:25 UTCJul 22, 16:50 UTC3h 25m
2026-07-22 DAL1503 JFK → ATL Jul 22, 00:20 UTCJul 22, 01:40 UTC1h 20m
2026-07-21 DAL1503 JFK → ATL Jul 21, 21:50 UTCJul 21, 23:10 UTC1h 20m
2026-07-21 DAL930 - Jul 21, 18:15 UTCJul 21, 20:25 UTC2h 10m
2026-07-21 DAL2667 - Jul 21, 14:10 UTCJul 21, 16:30 UTC2h 20m
2026-07-20 DAL1050 IAH → MSP Jul 20, 11:40 UTCJul 20, 14:10 UTC2h 30m
2026-07-20 DAL2514 IND → ATL Jul 20, 02:05 UTCJul 20, 04:45 UTC2h 40m
2026-07-20 DAL2514 IND → ATL Jul 20, 02:02 UTCJul 20, 04:43 UTC2h 41m
2026-07-19 DAL2455 - Jul 19, 19:40 UTCJul 19, 22:20 UTC2h 40m
2026-07-19 DAL2455 SLC → STL Jul 19, 15:50 UTCJul 19, 18:25 UTC2h 35m
2026-07-19 DAL2897 - Jul 19, 12:15 UTCJul 19, 14:15 UTC2h 0m
2026-07-19 DAL1657 BOS → DTW Jul 19, 02:20 UTCJul 19, 03:15 UTC55m
2026-07-18 DAL1533 - Jul 18, 21:55 UTCJul 18, 23:00 UTC1h 5m
2026-07-18 DAL1533 MSP → ORD Jul 18, 19:00 UTCJul 18, 20:05 UTC1h 5m
2026-07-18 DAL2622 - Jul 18, 14:10 UTCJul 18, 16:35 UTC2h 25m
2026-07-18 DAL2622 PSC → MSP Jul 18, 14:04 UTCJul 18, 16:31 UTC2h 27m
2026-07-17 DAL762 - Jul 17, 23:50 UTCJul 18, 02:45 UTC2h 55m
2026-07-17 DAL2528 MSY → ATL Jul 17, 19:49 UTCJul 17, 22:20 UTC2h 30m
2026-07-17 DAL3123 - Jul 17, 16:04 UTCJul 17, 18:40 UTC2h 35m
2026-07-17 DAL1314 SJC → SLC Jul 17, 13:10 UTCJul 17, 14:39 UTC1h 30m
2026-07-16 DAL2087 MSP → SJC Jul 16, 23:49 UTCJul 17, 03:45 UTC3h 55m
2026-07-16 DAL1613 - Jul 16, 21:19 UTCJul 16, 22:25 UTC1h 5m
2026-07-16 DAL1613 MCI → MSP Jul 16, 21:18 UTCJul 16, 22:19 UTC1h 1m
2026-07-16 DAL1613 - Jul 16, 18:59 UTCJul 16, 20:00 UTC1h 0m
2026-07-16 DAL3188 STL → MSP Jul 16, 16:25 UTCJul 16, 17:35 UTC1h 10m
2026-07-16 DAL3188 MSP → STL Jul 16, 14:10 UTCJul 16, 15:14 UTC1h 5m
2026-07-16 DAL2491 - Jul 16, 10:35 UTCJul 16, 12:40 UTC2h 5m
2026-07-16 DAL2929 - Jul 16, 01:25 UTCJul 16, 03:30 UTC2h 5m
2026-07-16 DAL2929 MSP → CLT Jul 16, 01:23 UTCJul 16, 03:24 UTC2h 1m
2026-07-15 DAL2574 - Jul 15, 21:30 UTCJul 16, 00:00 UTC2h 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 N142DU page for operator, model, and routing details .

Mode-S A0AA7C frequently asked

What is Mode-S code A0AA7C?
A0AA7C is an ICAO 24-bit transponder address. Allocated to United States. Assigned to N142DU.
Where is Mode-S A0AA7C registered?
Mode-S code A0AA7C 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 A0AA7C broadcasting right now?
Mode-S A0AA7C is currently broadcasting from the ground.
Hex, octal, and decimal Mode-S codes: what's the difference?
The same 24-bit identifier expressed in different bases: hex A0AA7C, octal 50125174, decimal 10,529,404.
What flights does A0AA7C operate?
Mode-S A0AA7C has broadcast 20 distinct callsigns, including DAL2574, DAL1533, DAL2327, DAL2285, DAL1277.