Apparatus

Try JFK, AAL1290, BAW, or N225AN.

sensors Mode-S transponder

A01037

ICAO 24-bit transponder address · allocated to United States

Currently assigned to N103DU · AIRBUS A220-100 · operated by DELTA AIR LINES INC

Hex
A01037
Octal
50010067
Decimal
10,489,911
Country
US
Tail
N103DU
Type
BCS1
No current signal · last broadcast 55m ago
Flights observed
446
Distinct callsigns
20
Country
US
Last broadcast
55m ago

Last known position

Most recent position reported by Mode-S A01037.

Country allocation

The ICAO 24-bit address A01037 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
DAL2661 - 16 2026-07-12
DAL1035 - 12 2026-07-13
DAL2895 Delta Air Lines 11 2026-05-09
DAL496 - 10 2026-07-13
DAL454 - 10 2026-07-13
DAL2550 - 9 2026-07-14
DAL2101 Delta Air Lines 8 2026-05-05
DAL1555 - 8 2026-07-15
DAL1272 - 8 2026-07-09
DAL831 Delta Air Lines 7 2026-05-04
DAL2414 - 7 2026-06-26
DAL2622 Delta Air Lines 6 2026-07-02
DAL2608 Delta Air Lines 6 2026-06-08
DAL2580 - 6 2026-07-07
DAL2390 - 6 2026-07-14
DAL2327 - 6 2026-07-02
DAL2099 Delta Air Lines 6 2026-04-14
DAL1553 Delta Air Lines 6 2026-05-24
DAL920 Delta Air Lines 5 2026-06-05
DAL834 Delta Air Lines 5 2026-05-06

Recent flights last 50

DateFlightRouteTakeoffLandingDuration
2026-07-15 DAL1555 - Jul 15, 00:20 UTCJul 15, 01:25 UTC1h 5m
2026-07-14 DAL1555 MSP → GRR Jul 14, 21:20 UTCJul 14, 22:20 UTC1h 0m
2026-07-14 DAL2550 - Jul 14, 18:10 UTCJul 14, 19:35 UTC1h 25m
2026-07-14 DAL2550 CMH → MSP Jul 14, 18:07 UTCJul 14, 19:33 UTC1h 26m
2026-07-14 DAL2550 MSP → CMH Jul 14, 15:25 UTCJul 14, 16:55 UTC1h 30m
2026-07-14 DAL2390 JFK → MSP Jul 14, 11:35 UTCJul 14, 13:55 UTC2h 20m
2026-07-14 DAL1394 MSY → JFK Jul 14, 06:45 UTCJul 14, 09:25 UTC2h 40m
2026-07-14 DAL1368 JFK → MSY Jul 14, 03:10 UTCJul 14, 05:45 UTC2h 35m
2026-07-13 DAL1035 - Jul 13, 22:50 UTCJul 14, 00:35 UTC1h 45m
2026-07-13 DAL1035 - Jul 13, 19:20 UTCJul 13, 21:15 UTC1h 55m
2026-07-13 DAL454 DFW → JFK Jul 13, 14:00 UTCJul 13, 17:20 UTC3h 20m
2026-07-13 DAL496 JFK → DFW Jul 13, 01:25 UTCJul 13, 04:55 UTC3h 30m
2026-07-13 DAL496 JFK → DFW Jul 13, 01:25 UTCJul 13, 04:32 UTC3h 7m
2026-07-12 DAL2661 MSP → JFK Jul 12, 20:25 UTCJul 12, 22:55 UTC2h 30m
2026-07-12 DAL2661 MSP → JFK Jul 12, 20:25 UTCJul 12, 22:39 UTC2h 14m
2026-07-12 DAL2390 JFK → MSP Jul 12, 11:50 UTCJul 12, 14:15 UTC2h 25m
2026-07-12 DAL1638 - Jul 12, 02:50 UTCJul 12, 05:01 UTC2h 10m
2026-07-12 DAL1638 - Jul 12, 02:46 UTCJul 12, 04:57 UTC2h 11m
2026-07-11 DAL1638 - Jul 11, 23:15 UTCJul 12, 01:35 UTC2h 20m
2026-07-11 DAL2320 RSW → JFK Jul 11, 16:15 UTCJul 11, 18:40 UTC2h 25m
2026-07-11 DAL2320 JFK → RSW Jul 11, 12:05 UTCJul 11, 14:35 UTC2h 30m
2026-07-11 DAL1316 - Jul 11, 02:05 UTCJul 11, 03:25 UTC1h 20m
2026-07-11 DAL1316 DTW → JFK Jul 11, 02:03 UTCJul 11, 03:23 UTC1h 20m
2026-07-10 DAL2443 JFK → DTW Jul 10, 21:15 UTCJul 10, 22:50 UTC1h 35m
2026-07-10 DAL2320 RSW → JFK Jul 10, 16:50 UTCJul 10, 19:00 UTC2h 10m
2026-07-10 DAL2320 JFK → RSW Jul 10, 12:30 UTCJul 10, 15:05 UTC2h 35m
2026-07-10 DAL2661 MSP → JFK Jul 10, 04:03 UTCJul 10, 06:13 UTC2h 10m
2026-07-10 DAL2661 MSP → JFK Jul 10, 04:05 UTCJul 10, 06:15 UTC2h 10m
2026-07-09 DAL2661 MSP → MSP Jul 9, 19:20 UTCJul 9, 21:10 UTC1h 50m
2026-07-09 DAL2661 MSP → MSP Jul 9, 19:19 UTCJul 9, 21:04 UTC1h 45m
2026-07-09 DAL2156 SJC → MSP Jul 9, 13:35 UTCJul 9, 16:40 UTC3h 5m
2026-07-09 DAL1272 SLC → SJC Jul 9, 04:50 UTCJul 9, 06:20 UTC1h 30m
2026-07-09 DAL1272 SLC → SJC Jul 9, 04:50 UTCJul 9, 06:16 UTC1h 26m
2026-07-09 DAL2903 - Jul 9, 00:25 UTCJul 9, 02:35 UTC2h 10m
2026-07-09 DAL2903 MCI → SLC Jul 9, 00:20 UTCJul 9, 02:28 UTC2h 8m
2026-07-08 DAL2903 - Jul 8, 21:30 UTCJul 8, 23:15 UTC1h 45m
2026-07-08 DAL1526 ATL → DTW Jul 8, 12:35 UTCJul 8, 13:45 UTC1h 10m
2026-07-08 DAL1582 SLC → SMF Jul 8, 05:15 UTCJul 8, 06:35 UTC1h 20m
2026-07-07 DAL2685 - Jul 7, 23:15 UTCJul 8, 01:40 UTC2h 25m
2026-07-07 DAL2580 - Jul 7, 19:25 UTCJul 7, 21:50 UTC2h 25m
2026-07-07 DAL561 - Jul 7, 17:10 UTCJul 7, 18:05 UTC55m
2026-07-07 DAL561 MKE → MSP Jul 7, 17:09 UTCJul 7, 18:01 UTC52m
2026-07-07 DAL561 - Jul 7, 15:15 UTCJul 7, 16:00 UTC45m
2026-07-07 DAL1050 - Jul 7, 11:50 UTCJul 7, 14:10 UTC2h 20m
2026-07-07 DAL2683 - Jul 7, 00:50 UTCJul 7, 03:05 UTC2h 15m
2026-07-06 DAL1533 - Jul 6, 22:30 UTCJul 6, 23:30 UTC1h 0m
2026-07-06 DAL1533 - Jul 6, 20:05 UTCJul 6, 21:00 UTC55m
2026-07-06 DAL845 - Jul 6, 15:45 UTCJul 6, 17:30 UTC1h 45m
2026-07-06 DAL845 MSP → PIT Jul 6, 12:35 UTCJul 6, 14:10 UTC1h 35m
2026-07-05 DAL2390 VPS → ATL Jul 5, 18:05 UTCJul 5, 20:30 UTC2h 25m

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 N103DU page for operator, model, and routing details .

Mode-S A01037 frequently asked

What is Mode-S code A01037?
A01037 is an ICAO 24-bit transponder address. Allocated to United States. Assigned to N103DU.
Where is Mode-S A01037 registered?
Mode-S code A01037 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 A01037 broadcasting right now?
No active broadcast right now. Last signal was 55m ago.
Hex, octal, and decimal Mode-S codes: what's the difference?
The same 24-bit identifier expressed in different bases: hex A01037, octal 50010067, decimal 10,489,911.
What flights does A01037 operate?
Mode-S A01037 has broadcast 20 distinct callsigns, including DAL2661, DAL1035, DAL2895, DAL496, DAL454.