Apparatus

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sensors Mode-S transponder

A3C15D

ICAO 24-bit transponder address · allocated to United States

Currently assigned to N341DN · AIRBUS A-321 · operated by UMB BANK NA TRUSTEE

Hex
A3C15D
Octal
50740535
Decimal
10,731,869
Country
US
Tail
N341DN
Type
A321
No current signal · last broadcast Jul 26, 17:05 UTC
Flights observed
556
Distinct callsigns
20
Country
US
Last broadcast
Jul 26, 17:05 UTC

Last known position

Most recent position reported by Mode-S A3C15D.

Country allocation

The ICAO 24-bit address A3C15D 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
DAL2923 Delta Air Lines 13 2026-06-11
DAL1692 Delta Air Lines 10 2026-07-02
DAL1200 Delta Air Lines 8 2026-05-05
DAL1137 - 8 2026-07-15
DAL2735 Delta Air Lines 7 2026-05-03
DAL2552 Delta Air Lines 7 2026-07-25
DAL1527 Delta Air Lines 7 2026-07-22
DAL821 - 6 2026-07-13
DAL1458 Delta Air Lines 6 2026-07-19
DAL1311 - 6 2026-07-16
DAL1271 Delta Air Lines 6 2026-07-24
DAL959 Delta Air Lines 5 2026-06-01
DAL2650 Delta Air Lines 5 2026-05-31
DAL2345 Delta Air Lines 5 2026-05-18
DAL2325 - 5 2026-06-26
DAL2266 - 5 2026-06-17
DAL2209 Delta Air Lines 5 2026-04-17
DAL2131 - 5 2026-07-10
DAL2063 - 5 2026-07-13
DAL1919 - 5 2026-07-05

Recent flights last 50

DateFlightRouteTakeoffLandingDuration
2026-07-26 DAL1916 ATL → PUJ Jul 26, 15:31 UTCJul 26, 18:39 UTC3h 8m
2026-07-26 DAL1916 ATL → PUJ Jul 26, 15:35 UTCJul 26, 17:05 UTC1h 30m
2026-07-26 DAL2643 FLL → LGA Jul 26, 11:25 UTCJul 26, 13:30 UTC2h 5m
2026-07-26 DAL2416 ATL → YUL Jul 26, 02:10 UTCJul 26, 04:20 UTC2h 10m
2026-07-25 DAL665 JFK → DEN Jul 25, 19:15 UTCJul 25, 23:20 UTC4h 5m
2026-07-25 DAL665 JFK → DEN Jul 25, 13:50 UTCJul 25, 17:30 UTC3h 40m
2026-07-25 DAL2353 EWR → ATL Jul 25, 10:25 UTCJul 25, 12:10 UTC1h 45m
2026-07-25 DAL2552 MEM → DTW Jul 25, 03:05 UTCJul 25, 04:45 UTC1h 40m
2026-07-24 DAL794 LGA → ORD Jul 24, 23:45 UTCJul 25, 01:15 UTC1h 30m
2026-07-24 DAL794 LGA → ORD Jul 24, 23:40 UTCJul 25, 01:13 UTC1h 33m
2026-07-24 DAL1169 CHS → LGA Jul 24, 20:04 UTCJul 24, 21:38 UTC1h 34m
2026-07-24 DAL1169 CHS → LGA Jul 24, 20:05 UTCJul 24, 21:15 UTC1h 10m
2026-07-24 DAL1271 ORD → SLC Jul 24, 16:35 UTCJul 24, 18:05 UTC1h 30m
2026-07-24 DAL1271 ORD → SLC Jul 24, 16:34 UTCJul 24, 17:54 UTC1h 20m
2026-07-24 DAL1271 ORD → SLC Jul 24, 13:20 UTCJul 24, 14:45 UTC1h 25m
2026-07-24 DAL1249 DTW → FLL Jul 24, 10:25 UTCJul 24, 11:50 UTC1h 25m
2026-07-24 DAL1589 ORD → BOS Jul 24, 03:11 UTCJul 24, 04:36 UTC1h 25m
2026-07-24 DAL1589 ORD → BOS Jul 24, 03:15 UTCJul 24, 04:45 UTC1h 30m
2026-07-24 DAL1295 PHL → MSP Jul 24, 00:10 UTCJul 24, 01:35 UTC1h 25m
2026-07-23 DAL1295 PHL → MSP Jul 23, 21:00 UTCJul 23, 22:25 UTC1h 25m
2026-07-23 DAL1030 MCO → ATL Jul 23, 18:20 UTCJul 23, 19:20 UTC1h 0m
2026-07-23 DAL1030 MCO → ATL Jul 23, 15:40 UTCJul 23, 16:40 UTC1h 0m
2026-07-23 DAL1066 JFK → AUS Jul 23, 11:50 UTCJul 23, 13:15 UTC1h 25m
2026-07-23 DAL1066 JFK → AUS Jul 23, 11:44 UTCJul 23, 13:48 UTC2h 4m
2026-07-22 DAL1465 BOS → SEA Jul 22, 20:15 UTCJul 22, 22:15 UTC2h 0m
2026-07-22 DAL1527 AUS → SLC Jul 22, 17:10 UTCJul 22, 18:30 UTC1h 20m
2026-07-22 DAL1527 AUS → SLC Jul 22, 14:10 UTCJul 22, 15:30 UTC1h 20m
2026-07-22 DAL1221 MSP → SLC Jul 22, 11:25 UTCJul 22, 12:25 UTC1h 0m
2026-07-22 DAL2388 SEA → LAS Jul 22, 03:15 UTCJul 22, 05:15 UTC2h 0m
2026-07-21 DAL1836 PUJ → ATL Jul 21, 20:46 UTCJul 21, 23:59 UTC3h 13m
2026-07-21 DAL1836 PUJ → ATL Jul 21, 16:05 UTCJul 22, 00:05 UTC8h 0m
2026-07-21 DAL1261 JFK → BOS Jul 21, 12:40 UTCJul 21, 14:05 UTC1h 25m
2026-07-21 DAL1261 JFK → BOS Jul 21, 12:35 UTCJul 21, 14:01 UTC1h 26m
2026-07-21 DAL1234 JFK → AUS Jul 21, 02:05 UTCJul 21, 03:30 UTC1h 25m
2026-07-20 DAL2627 ATL → BOS Jul 20, 23:55 UTCJul 21, 00:45 UTC50m
2026-07-20 DAL2627 ATL → BOS Jul 20, 21:30 UTCJul 20, 22:35 UTC1h 5m
2026-07-20 DAL2886 ATL → AUS Jul 20, 17:20 UTCJul 20, 19:10 UTC1h 50m
2026-07-20 DAL2886 ATL → AUS Jul 20, 14:00 UTCJul 20, 15:50 UTC1h 50m
2026-07-20 DAL2429 ALB → ATL Jul 20, 10:20 UTCJul 20, 12:15 UTC1h 55m
2026-07-20 DAL2584 ATL → ALB Jul 20, 03:00 UTCJul 20, 04:50 UTC1h 50m
2026-07-19 DAL1458 ATL → PBI Jul 19, 23:55 UTCJul 20, 01:10 UTC1h 15m
2026-07-19 DAL1458 ATL → PBI Jul 19, 23:52 UTCJul 20, 01:12 UTC1h 20m
2026-07-19 DAL1458 ATL → PBI Jul 19, 21:10 UTCJul 19, 22:25 UTC1h 15m
2026-07-19 DAL1384 BDL → ATL Jul 19, 17:05 UTCJul 19, 19:25 UTC2h 20m
2026-07-19 DAL1384 BDL → ATL Jul 19, 14:15 UTCJul 19, 15:45 UTC1h 30m
2026-07-19 DAL1249 - Jul 19, 10:15 UTCJul 19, 11:15 UTC1h 0m
2026-07-19 DAL1249 MIA → ATL Jul 19, 10:11 UTCJul 19, 11:32 UTC1h 21m
2026-07-19 DAL1589 - Jul 19, 03:30 UTCJul 19, 05:10 UTC1h 40m
2026-07-19 DAL493 MCO → ATL Jul 19, 00:20 UTCJul 19, 01:20 UTC1h 0m
2026-07-18 DAL1885 MSP → MCO Jul 18, 19:35 UTCJul 18, 22:20 UTC2h 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 N341DN page for operator, model, and routing details .

Mode-S A3C15D frequently asked

What is Mode-S code A3C15D?
A3C15D is an ICAO 24-bit transponder address. Allocated to United States. Assigned to N341DN.
Where is Mode-S A3C15D registered?
Mode-S code A3C15D 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 A3C15D broadcasting right now?
No active broadcast right now. Last signal was Jul 26, 17:05 UTC.
Hex, octal, and decimal Mode-S codes: what's the difference?
The same 24-bit identifier expressed in different bases: hex A3C15D, octal 50740535, decimal 10,731,869.
What flights does A3C15D operate?
Mode-S A3C15D has broadcast 20 distinct callsigns, including DAL2923, DAL1692, DAL1200, DAL1137, DAL2735.