Apparatus

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sensors Mode-S transponder

A3D039

ICAO 24-bit transponder address · allocated to United States

Currently assigned to N345DN · AIRBUS A-321 · operated by BANK OF UTAH TRUSTEE

Hex
A3D039
Octal
50750071
Decimal
10,735,673
Country
US
Tail
N345DN
Type
A321
No current signal · last broadcast Jul 26, 22:05 UTC
Flights observed
582
Distinct callsigns
20
Country
US
Last broadcast
Jul 26, 22:05 UTC

Last known position

Most recent position reported by Mode-S A3D039.

Country allocation

The ICAO 24-bit address A3D039 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
DAL1527 Delta Air Lines 14 2026-06-14
DAL1587 - 8 2026-07-18
DAL1099 - 8 2026-07-04
DAL655 - 7 2026-07-08
DAL374 - 7 2026-06-22
DAL1512 - 7 2026-07-21
DAL1375 Delta Air Lines 7 2026-06-13
DAL1153 - 7 2026-06-21
DAL1100 - 7 2026-06-29
DAL959 Delta Air Lines 6 2026-07-21
DAL838 Delta Air Lines 6 2026-06-08
DAL2011 - 6 2026-06-19
DAL1606 - 6 2026-07-02
DAL1576 Delta Air Lines 6 2026-05-31
DAL1352 - 6 2026-06-21
DAL1311 - 6 2026-07-01
DAL1257 - 6 2026-07-02
DAL1167 Delta Air Lines 6 2026-07-18
DAL2976 - 5 2026-07-19
DAL2266 - 5 2026-07-01

Recent flights last 50

DateFlightRouteTakeoffLandingDuration
2026-07-26 DAL2312 ATL → BDL Jul 26, 20:20 UTCJul 26, 21:55 UTC1h 35m
2026-07-26 DAL2312 ATL → BDL Jul 26, 16:35 UTCJul 26, 18:45 UTC2h 10m
2026-07-26 DAL2777 DTW → ATL Jul 26, 13:45 UTCJul 26, 15:10 UTC1h 25m
2026-07-26 DAL1388 SLC → AUS Jul 26, 09:45 UTCJul 26, 11:05 UTC1h 20m
2026-07-26 DAL2839 DTW → RDU Jul 26, 02:00 UTCJul 26, 03:15 UTC1h 15m
2026-07-25 DAL1539 ATL → TUL Jul 25, 20:40 UTCJul 25, 23:10 UTC2h 30m
2026-07-25 DAL1539 ATL → TUL Jul 25, 20:35 UTCJul 25, 22:46 UTC2h 11m
2026-07-25 DAL1539 ATL → TUL Jul 25, 16:40 UTCJul 25, 18:45 UTC2h 5m
2026-07-25 DAL1748 BOS → DTW Jul 25, 13:30 UTCJul 25, 15:05 UTC1h 35m
2026-07-25 DAL300 JFK → SFO Jul 25, 00:55 UTCJul 25, 03:00 UTC2h 5m
2026-07-25 DAL300 JFK → SFO Jul 25, 00:51 UTCJul 25, 02:56 UTC2h 5m
2026-07-24 DAL1803 SDQ → ATL Jul 24, 19:30 UTCJul 24, 22:10 UTC2h 40m
2026-07-24 DAL1958 ATL → SDQ Jul 24, 14:35 UTCJul 24, 15:55 UTC1h 20m
2026-07-24 DAL1344 AUS → ATL Jul 24, 10:35 UTCJul 24, 12:25 UTC1h 50m
2026-07-24 DAL1335 MSY → LGA Jul 24, 03:20 UTCJul 24, 05:10 UTC1h 50m
2026-07-23 DAL2464 DTW → PHL Jul 23, 22:30 UTCJul 24, 00:45 UTC2h 15m
2026-07-23 DAL726 ATL → BNH Jul 23, 18:30 UTCJul 23, 20:35 UTC2h 5m
2026-07-23 DAL1585 ATL → IAH Jul 23, 15:15 UTCJul 23, 16:55 UTC1h 40m
2026-07-23 DAL1585 ATL → IAH Jul 23, 15:13 UTCJul 23, 16:50 UTC1h 37m
2026-07-23 DAL1585 ATL → IAH Jul 23, 11:45 UTCJul 23, 13:20 UTC1h 35m
2026-07-22 DAL1458 ATL → PBI Jul 22, 22:45 UTCJul 23, 00:00 UTC1h 15m
2026-07-22 DAL1458 ATL → PBI Jul 22, 19:55 UTCJul 22, 21:20 UTC1h 25m
2026-07-22 DAL664 MCO → ATL Jul 22, 17:25 UTCJul 22, 18:30 UTC1h 5m
2026-07-22 DAL664 ATL → MCO Jul 22, 14:50 UTCJul 22, 15:50 UTC1h 0m
2026-07-22 DAL1301 - Jul 22, 12:10 UTCJul 22, 13:25 UTC1h 15m
2026-07-21 DAL959 DEN → ATL Jul 21, 20:55 UTCJul 21, 22:15 UTC1h 20m
2026-07-21 DAL1512 - Jul 21, 17:45 UTCJul 21, 18:15 UTC30m
2026-07-21 DAL1512 FLL → ATL Jul 21, 17:42 UTCJul 21, 19:06 UTC1h 24m
2026-07-21 DAL1512 ATL → FLL Jul 21, 14:40 UTCJul 21, 16:05 UTC1h 25m
2026-07-21 DAL1326 PPM → ATL Jul 21, 11:50 UTCJul 21, 13:10 UTC1h 20m
2026-07-21 DAL1489 ATL → FLL Jul 21, 00:30 UTCJul 21, 02:05 UTC1h 35m
2026-07-20 DAL1919 PUJ → ATL Jul 20, 14:20 UTCJul 20, 22:20 UTC8h 0m
2026-07-20 DAL1069 IAH → ATL Jul 20, 10:55 UTCJul 20, 12:35 UTC1h 40m
2026-07-20 DAL1601 - Jul 20, 03:35 UTCJul 20, 05:05 UTC1h 30m
2026-07-20 DAL1601 ATL → IAH Jul 20, 03:34 UTCJul 20, 05:01 UTC1h 27m
2026-07-19 DAL1386 HWO → ATL Jul 19, 23:45 UTCJul 20, 01:05 UTC1h 20m
2026-07-19 DAL1386 ATL → MIA Jul 19, 20:35 UTCJul 19, 22:15 UTC1h 40m
2026-07-19 DAL2976 AUS → ATL Jul 19, 15:50 UTCJul 19, 17:55 UTC2h 5m
2026-07-19 DAL2976 ATL → AUS Jul 19, 12:25 UTCJul 19, 14:15 UTC1h 50m
2026-07-18 DAL1587 TPA → ATL Jul 18, 17:00 UTCJul 18, 18:05 UTC1h 5m
2026-07-18 DAL1587 TPA → ATL Jul 18, 16:58 UTCJul 18, 18:01 UTC1h 3m
2026-07-18 DAL1587 ATL → TPA Jul 18, 14:20 UTCJul 18, 15:35 UTC1h 15m
2026-07-18 DAL1344 AUS → ATL Jul 18, 10:35 UTCJul 18, 12:25 UTC1h 50m
2026-07-18 DAL1344 AUS → ATL Jul 18, 10:34 UTCJul 18, 12:23 UTC1h 49m
2026-07-18 DAL1335 ATL → AUS Jul 18, 04:55 UTCJul 18, 06:40 UTC1h 45m
2026-07-18 DAL1335 ATL → AUS Jul 18, 04:53 UTCJul 18, 06:41 UTC1h 48m
2026-07-18 DAL1167 LGA → DTW Jul 18, 02:14 UTCJul 18, 03:25 UTC1h 11m
2026-07-17 DAL1167 LGA → DTW Jul 17, 23:14 UTCJul 18, 00:35 UTC1h 20m
2026-07-17 DAL2325 EWR → ATL Jul 17, 14:55 UTCJul 17, 16:40 UTC1h 45m
2026-07-17 DAL2325 EWR → ATL Jul 17, 14:55 UTCJul 17, 16:37 UTC1h 42m

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 N345DN page for operator, model, and routing details .

Mode-S A3D039 frequently asked

What is Mode-S code A3D039?
A3D039 is an ICAO 24-bit transponder address. Allocated to United States. Assigned to N345DN.
Where is Mode-S A3D039 registered?
Mode-S code A3D039 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 A3D039 broadcasting right now?
No active broadcast right now. Last signal was Jul 26, 22:05 UTC.
Hex, octal, and decimal Mode-S codes: what's the difference?
The same 24-bit identifier expressed in different bases: hex A3D039, octal 50750071, decimal 10,735,673.
What flights does A3D039 operate?
Mode-S A3D039 has broadcast 20 distinct callsigns, including DAL1527, DAL1587, DAL1099, DAL655, DAL374.