Apparatus

Try JFK, AAL1290, BAW, or N225AN.

sensors Mode-S transponder

A3411F

ICAO 24-bit transponder address · allocated to United States

Currently assigned to N309DU · AIRBUS A220-300 · operated by DELTA AIR LINES INC

Hex
A3411F
Octal
50640437
Decimal
10,699,039
Country
US
Tail
N309DU
Type
BCS3
No current signal · last broadcast Jul 26, 21:45 UTC
Flights observed
467
Distinct callsigns
20
Country
US
Last broadcast
Jul 26, 21:45 UTC

Last known position

Most recent position reported by Mode-S A3411F.

Country allocation

The ICAO 24-bit address A3411F 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
DAL750 Delta Air Lines 14 2026-05-04
DAL2985 - 12 2026-07-14
DAL2442 Delta Air Lines 12 2026-05-05
DAL2068 - 11 2026-06-29
DAL2930 - 10 2026-07-11
DAL2528 Delta Air Lines 10 2026-05-10
DAL2140 - 10 2026-07-18
DAL572 - 9 2026-06-29
DAL873 - 8 2026-07-04
DAL2644 Delta Air Lines 8 2026-07-21
DAL2617 - 8 2026-07-19
DAL2508 Delta Air Lines 8 2026-05-05
DAL2503 - 8 2026-07-18
DAL1412 Delta Air Lines 8 2026-05-24
DAL1390 - 8 2026-07-15
DAL2194 Delta Air Lines 7 2026-07-03
DAL2186 Delta Air Lines 7 2026-05-05
DAL922 Delta Air Lines 6 2026-05-25
DAL2445 Delta Air Lines 6 2026-07-06
DAL2412 Delta Air Lines 6 2026-05-28

Recent flights last 50

DateFlightRouteTakeoffLandingDuration
2026-07-26 DAL475 CVG → ATL Jul 26, 19:45 UTCJul 26, 21:45 UTC2h 0m
2026-07-26 DAL475 CVG → ATL Jul 26, 15:55 UTCJul 26, 18:05 UTC2h 10m
2026-07-25 DAL2574 BOS → SEA Jul 25, 19:30 UTCJul 25, 22:05 UTC2h 35m
2026-07-25 DAL2574 BOS → SEA Jul 25, 15:35 UTCJul 25, 17:50 UTC2h 15m
2026-07-25 DAL2717 ATL → LGA Jul 25, 11:20 UTCJul 25, 13:50 UTC2h 30m
2026-07-24 DAL2773 EWR → ATL Jul 24, 23:50 UTCJul 25, 02:10 UTC2h 20m
2026-07-24 DAL2773 EWR → ATL Jul 24, 23:48 UTCJul 25, 02:02 UTC2h 14m
2026-07-24 DAL2678 MEM → ATL Jul 24, 19:50 UTCJul 24, 22:15 UTC2h 25m
2026-07-24 DAL2099 ATL → BOS Jul 24, 15:10 UTCJul 24, 18:20 UTC3h 10m
2026-07-24 DAL370 KOA → LAX Jul 24, 11:10 UTCJul 24, 13:25 UTC2h 15m
2026-07-24 DAL563 LGA → MCI Jul 24, 00:40 UTCJul 24, 03:10 UTC2h 30m
2026-07-23 DAL2088 AUS → BOS Jul 23, 19:25 UTCJul 23, 22:35 UTC3h 10m
2026-07-23 DAL2673 PVD → ATL Jul 23, 15:45 UTCJul 23, 17:45 UTC2h 0m
2026-07-23 DAL2673 PVD → ATL Jul 23, 15:42 UTCJul 23, 18:03 UTC2h 21m
2026-07-23 DAL1493 DCA → MSP Jul 23, 12:00 UTCJul 23, 14:25 UTC2h 25m
2026-07-22 DAL2962 LAX → PDX Jul 22, 23:55 UTCJul 23, 01:50 UTC1h 55m
2026-07-22 DAL2679 ATL → BDL Jul 22, 20:05 UTCJul 22, 22:40 UTC2h 35m
2026-07-22 DAL2679 ATL → BDL Jul 22, 16:20 UTCJul 22, 18:20 UTC2h 0m
2026-07-22 DAL1554 - Jul 22, 13:40 UTCJul 22, 14:40 UTC1h 0m
2026-07-22 DAL2251 DTW → BDL Jul 22, 11:10 UTCJul 22, 12:15 UTC1h 5m
2026-07-22 DAL2943 - Jul 22, 00:35 UTCJul 22, 03:45 UTC3h 10m
2026-07-21 DAL2644 ATL → EWR Jul 21, 20:15 UTCJul 21, 22:30 UTC2h 15m
2026-07-21 DAL2958 ATL → OMA Jul 21, 16:20 UTCJul 21, 18:55 UTC2h 35m
2026-07-21 DAL2958 ATL → OMA Jul 21, 12:50 UTCJul 21, 14:45 UTC1h 55m
2026-07-21 DAL1306 MCO → BOS Jul 21, 00:00 UTCJul 21, 01:00 UTC1h 0m
2026-07-20 DAL1306 MCO → BOS Jul 20, 21:10 UTCJul 20, 22:25 UTC1h 15m
2026-07-20 DAL1567 - Jul 20, 18:40 UTCJul 20, 19:45 UTC1h 5m
2026-07-20 DAL1567 - Jul 20, 15:45 UTCJul 20, 17:00 UTC1h 15m
2026-07-20 DAL2717 ATL → LGA Jul 20, 11:20 UTCJul 20, 13:45 UTC2h 25m
2026-07-20 DAL2773 EWR → ATL Jul 20, 00:15 UTCJul 20, 02:35 UTC2h 20m
2026-07-19 DAL2617 - Jul 19, 00:50 UTCJul 19, 03:05 UTC2h 15m
2026-07-18 DAL2140 - Jul 18, 20:10 UTCJul 18, 23:30 UTC3h 20m
2026-07-18 DAL2503 - Jul 18, 03:30 UTCJul 18, 05:10 UTC1h 40m
2026-07-18 DAL2503 ORD → LGA Jul 18, 03:27 UTCJul 18, 05:06 UTC1h 39m
2026-07-17 DAL2503 - Jul 17, 23:35 UTCJul 18, 01:30 UTC1h 55m
2026-07-17 DAL2461 MSY → LGA Jul 17, 16:59 UTCJul 17, 19:35 UTC2h 35m
2026-07-17 DAL2461 MSY → LGA Jul 17, 17:00 UTCJul 17, 19:32 UTC2h 32m
2026-07-17 DAL1368 JFK → MSY Jul 17, 13:25 UTCJul 17, 15:55 UTC2h 30m
2026-07-17 DAL1394 - Jul 17, 01:00 UTCJul 17, 03:39 UTC2h 40m
2026-07-16 DAL2405 - Jul 16, 21:15 UTCJul 16, 23:49 UTC2h 35m
2026-07-16 DAL2461 - Jul 16, 17:00 UTCJul 16, 19:45 UTC2h 45m
2026-07-16 DAL1368 JFK → MSY Jul 16, 13:15 UTCJul 16, 15:49 UTC2h 35m
2026-07-16 DAL1394 MSY → JFK Jul 16, 01:50 UTCJul 16, 04:30 UTC2h 40m
2026-07-15 DAL2405 LGA → MSY Jul 15, 22:05 UTCJul 16, 00:45 UTC2h 40m
2026-07-15 DAL2140 - Jul 15, 16:10 UTCJul 15, 19:20 UTC3h 10m
2026-07-15 DAL2140 - Jul 15, 11:20 UTCJul 15, 14:20 UTC3h 0m
2026-07-15 DAL1390 ORD → LGA Jul 15, 00:35 UTCJul 15, 02:20 UTC1h 45m
2026-07-14 DAL1390 LGA → ORD Jul 14, 20:15 UTCJul 14, 22:00 UTC1h 45m
2026-07-14 DAL2985 - Jul 14, 16:40 UTCJul 14, 18:30 UTC1h 50m
2026-07-14 DAL2985 LGA → ORD Jul 14, 13:10 UTCJul 14, 14:55 UTC1h 45m

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 N309DU page for operator, model, and routing details .

Mode-S A3411F frequently asked

What is Mode-S code A3411F?
A3411F is an ICAO 24-bit transponder address. Allocated to United States. Assigned to N309DU.
Where is Mode-S A3411F registered?
Mode-S code A3411F 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 A3411F broadcasting right now?
No active broadcast right now. Last signal was Jul 26, 21:45 UTC.
Hex, octal, and decimal Mode-S codes: what's the difference?
The same 24-bit identifier expressed in different bases: hex A3411F, octal 50640437, decimal 10,699,039.
What flights does A3411F operate?
Mode-S A3411F has broadcast 20 distinct callsigns, including DAL750, DAL2985, DAL2442, DAL2068, DAL2930.