Apparatus

Try JFK, AAL1290, BAW, or N225AN.

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 5h ago
Flights observed
485
Distinct callsigns
20
Country
US
Last broadcast
5h ago

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
DAL2735 Delta Air Lines 7 2026-05-03
DAL821 - 6 2026-07-13
DAL2552 - 6 2026-07-03
DAL1137 - 6 2026-07-01
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
DAL1579 Delta Air Lines 5 2026-06-10
DAL1527 - 5 2026-06-16
DAL1386 - 5 2026-06-20
DAL839 Delta Air Lines 4 2026-06-03

Recent flights last 50

DateFlightRouteTakeoffLandingDuration
2026-07-13 DAL821 ATL → BNH Jul 13, 22:30 UTCJul 14, 00:40 UTC2h 10m
2026-07-13 DAL821 ATL → BOS Jul 13, 22:28 UTCJul 14, 00:37 UTC2h 9m
2026-07-13 DAL2063 - Jul 13, 19:05 UTCJul 13, 20:50 UTC1h 45m
2026-07-13 DAL2063 ATL → FLL Jul 13, 16:00 UTCJul 13, 17:30 UTC1h 30m
2026-07-13 DAL2365 - Jul 13, 12:55 UTCJul 13, 14:40 UTC1h 45m
2026-07-13 DAL2365 EWR → ATL Jul 13, 12:52 UTCJul 13, 14:35 UTC1h 43m
2026-07-13 DAL2498 ATL → EWR Jul 13, 01:10 UTCJul 13, 03:25 UTC2h 15m
2026-07-12 DAL2279 PHL → ATL Jul 12, 20:55 UTCJul 12, 22:35 UTC1h 40m
2026-07-12 DAL2279 ATL → PHL Jul 12, 16:55 UTCJul 12, 18:25 UTC1h 30m
2026-07-12 DAL2479 - Jul 12, 13:05 UTCJul 12, 15:20 UTC2h 15m
2026-07-11 DAL2479 - Jul 11, 14:55 UTCJul 11, 17:05 UTC2h 10m
2026-07-11 DAL1211 - Jul 11, 11:25 UTCJul 11, 12:50 UTC1h 25m
2026-07-11 DAL1588 - Jul 11, 00:30 UTCJul 11, 02:05 UTC1h 35m
2026-07-10 DAL2131 PHL → ATL Jul 10, 21:12 UTCJul 10, 22:43 UTC1h 31m
2026-07-10 DAL2131 PHL → ATL Jul 10, 21:15 UTCJul 10, 22:45 UTC1h 30m
2026-07-10 DAL2131 ATL → PHL Jul 10, 18:05 UTCJul 10, 19:45 UTC1h 40m
2026-07-10 DAL1180 - Jul 10, 14:35 UTCJul 10, 16:05 UTC1h 30m
2026-07-10 DAL1329 ATL → PHL Jul 10, 01:04 UTCJul 10, 02:42 UTC1h 38m
2026-07-10 DAL1329 ATL → PHL Jul 10, 01:05 UTCJul 10, 02:45 UTC1h 40m
2026-07-09 DAL385 BOS → ATL Jul 9, 19:57 UTCJul 9, 22:12 UTC2h 15m
2026-07-09 DAL385 BOS → ATL Jul 9, 20:00 UTCJul 9, 22:15 UTC2h 15m
2026-07-09 DAL862 ATL → BNH Jul 9, 15:50 UTCJul 9, 18:15 UTC2h 25m
2026-07-09 DAL2643 YUL → ATL Jul 9, 11:25 UTCJul 9, 13:35 UTC2h 10m
2026-07-09 DAL2416 - Jul 9, 01:25 UTCJul 9, 03:15 UTC1h 50m
2026-07-09 DAL2416 ATL → YUL Jul 9, 01:22 UTCJul 9, 03:21 UTC1h 59m
2026-07-08 DAL1028 MSP → ATL Jul 8, 21:45 UTCJul 9, 00:00 UTC2h 15m
2026-07-08 DAL2301 TPA → MSP Jul 8, 17:20 UTCJul 8, 20:15 UTC2h 55m
2026-07-08 DAL2301 MSP → TPA Jul 8, 13:25 UTCJul 8, 16:10 UTC2h 45m
2026-07-07 DAL2366 - Jul 7, 22:00 UTCJul 8, 00:55 UTC2h 55m
2026-07-07 DAL1241 MSP → YVR Jul 7, 16:55 UTCJul 7, 20:20 UTC3h 25m
2026-07-07 DAL949 SEA → MSP Jul 7, 01:55 UTCJul 7, 04:45 UTC2h 50m
2026-07-06 DAL877 MSP → SEA Jul 6, 20:40 UTCJul 7, 00:05 UTC3h 25m
2026-07-06 DAL877 MSP → SEA Jul 6, 20:37 UTCJul 6, 23:57 UTC3h 20m
2026-07-06 DAL2901 ATL → MSP Jul 6, 16:35 UTCJul 6, 18:40 UTC2h 5m
2026-07-06 DAL2901 ATL → MSP Jul 6, 16:32 UTCJul 6, 18:35 UTC2h 3m
2026-07-06 DAL644 - Jul 6, 13:20 UTCJul 6, 14:55 UTC1h 35m
2026-07-06 DAL644 IAH → ATL Jul 6, 13:19 UTCJul 6, 14:50 UTC1h 31m
2026-07-06 DAL1284 - Jul 6, 01:05 UTCJul 6, 02:55 UTC1h 50m
2026-07-05 DAL1919 PUJ → ATL Jul 5, 19:23 UTCJul 5, 22:38 UTC3h 15m
2026-07-05 DAL1796 ATL → ATL Jul 5, 14:40 UTCJul 5, 22:40 UTC8h 0m
2026-07-05 DAL2080 MCO → ATL Jul 5, 11:10 UTCJul 5, 12:10 UTC1h 0m
2026-07-05 DAL1497 ATL → MCO Jul 5, 00:15 UTCJul 5, 01:15 UTC1h 0m
2026-07-04 DAL1437 - Jul 4, 19:10 UTCJul 4, 20:15 UTC1h 5m
2026-07-04 DAL1437 - Jul 4, 16:35 UTCJul 4, 17:45 UTC1h 10m
2026-07-04 DAL893 - Jul 4, 13:05 UTCJul 4, 14:50 UTC1h 45m
2026-07-04 DAL893 DFW → ATL Jul 4, 13:03 UTCJul 4, 14:45 UTC1h 42m
2026-07-04 DAL374 ATL → DFW Jul 4, 00:25 UTCJul 4, 02:05 UTC1h 40m
2026-07-03 DAL1030 MCO → ATL Jul 3, 21:35 UTCJul 3, 22:45 UTC1h 10m
2026-07-03 DAL1030 ATL → MCO Jul 3, 16:00 UTCJul 3, 17:05 UTC1h 5m
2026-07-03 DAL2365 MSP → SFO Jul 3, 12:55 UTCJul 3, 14:35 UTC1h 40m

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 5h ago.
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, DAL2735, DAL821.