Apparatus

Try JFK, AAL1290, BAW, or N225AN.

sensors Mode-S transponder

A3A503

ICAO 24-bit transponder address · allocated to United States

Currently assigned to N334DN · AIRBUS A-321 · operated by BANK OF UTAH TRUSTEE

Hex
A3A503
Octal
50722403
Decimal
10,724,611
Country
US
Tail
N334DN
Type
A321
No current signal · last broadcast 4h ago
Flights observed
469
Distinct callsigns
20
Country
US
Last broadcast
4h ago

Last known position

Most recent position reported by Mode-S A3A503.

Country allocation

The ICAO 24-bit address A3A503 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
DAL1137 - 9 2026-07-12
DAL1631 - 8 2026-07-09
DAL838 - 7 2026-07-05
DAL1167 - 6 2026-06-25
DAL1100 Delta Air Lines 6 2026-06-11
DAL1098 - 6 2026-06-20
DAL2401 - 5 2026-07-09
DAL1621 Delta Air Lines 5 2026-05-04
DAL1579 Delta Air Lines 5 2026-06-04
DAL1030 - 5 2026-07-04
DAL664 - 4 2026-07-03
DAL2976 - 4 2026-07-10
DAL2899 Delta Air Lines 4 2026-06-26
DAL2825 Delta Air Lines 4 2026-06-10
DAL2738 Delta Air Lines 4 2026-06-01
DAL2212 Delta Air Lines 4 2026-05-21
DAL2167 Delta Air Lines 4 2026-05-03
DAL1572 Delta Air Lines 4 2026-06-29
DAL1413 Delta Air Lines 4 2026-06-03
DAL1341 Delta Air Lines 4 2026-05-12

Recent flights last 50

DateFlightRouteTakeoffLandingDuration
2026-07-15 DAL2642 ATL → PHL Jul 15, 03:10 UTCJul 15, 04:40 UTC1h 30m
2026-07-14 DAL2464 BOS → ATL Jul 14, 22:35 UTCJul 15, 00:45 UTC2h 9m
2026-07-14 DAL726 ATL → BNH Jul 14, 18:25 UTCJul 14, 20:35 UTC2h 10m
2026-07-14 DAL1462 - Jul 14, 14:30 UTCJul 14, 15:40 UTC1h 10m
2026-07-14 DAL1462 - Jul 14, 11:50 UTCJul 14, 13:00 UTC1h 10m
2026-07-14 DAL374 DFW → ATL Jul 14, 01:56 UTCJul 14, 03:32 UTC1h 36m
2026-07-14 DAL374 DFW → ATL Jul 14, 02:00 UTCJul 14, 03:35 UTC1h 35m
2026-07-13 DAL374 ATL → DFW Jul 13, 21:10 UTCJul 13, 23:25 UTC2h 15m
2026-07-13 DAL1153 RSW → ATL Jul 13, 17:45 UTCJul 13, 19:30 UTC1h 45m
2026-07-13 DAL1153 ATL → RSW Jul 13, 14:35 UTCJul 13, 15:55 UTC1h 20m
2026-07-13 DAL1344 AUS → ATL Jul 13, 10:35 UTCJul 13, 12:15 UTC1h 40m
2026-07-13 DAL1335 ATL → AUS Jul 13, 03:40 UTCJul 13, 05:31 UTC1h 50m
2026-07-13 DAL2189 - Jul 13, 01:20 UTCJul 13, 02:05 UTC45m
2026-07-12 DAL2189 - Jul 12, 22:55 UTCJul 12, 23:50 UTC55m
2026-07-12 DAL1137 - Jul 12, 19:30 UTCJul 12, 21:25 UTC1h 55m
2026-07-12 DAL1137 ALB → ATL Jul 12, 19:25 UTCJul 12, 21:23 UTC1h 58m
2026-07-12 DAL1137 ATL → ALB Jul 12, 13:40 UTCJul 12, 15:35 UTC1h 55m
2026-07-11 DAL1836 ATL → ATL Jul 11, 15:20 UTCJul 11, 23:30 UTC8h 10m
2026-07-11 DAL1515 - Jul 11, 10:50 UTCJul 11, 13:10 UTC2h 20m
2026-07-11 DAL2138 - Jul 11, 02:55 UTCJul 11, 05:01 UTC2h 5m
2026-07-11 DAL1150 MCO → ATL Jul 11, 00:15 UTCJul 11, 01:20 UTC1h 5m
2026-07-10 DAL1150 ATL → MCO Jul 10, 19:20 UTCJul 10, 20:20 UTC1h 0m
2026-07-10 DAL2976 AUS → ATL Jul 10, 15:45 UTCJul 10, 17:35 UTC1h 50m
2026-07-10 DAL2976 ATL → AUS Jul 10, 12:25 UTCJul 10, 14:10 UTC1h 45m
2026-07-10 DAL1632 - Jul 10, 01:45 UTCJul 10, 03:15 UTC1h 30m
2026-07-09 DAL1631 ATL → MIA Jul 9, 22:34 UTCJul 10, 00:21 UTC1h 47m
2026-07-09 DAL1631 ATL → MIA Jul 9, 22:35 UTCJul 10, 00:30 UTC1h 55m
2026-07-09 DAL2401 EWR → ATL Jul 9, 18:25 UTCJul 9, 20:20 UTC1h 55m
2026-07-09 DAL2401 ATL → EWR Jul 9, 14:35 UTCJul 9, 16:40 UTC2h 5m
2026-07-09 DAL2579 - Jul 9, 11:25 UTCJul 9, 12:50 UTC1h 25m
2026-07-09 DAL1257 ATL → BWI Jul 9, 00:35 UTCJul 9, 02:00 UTC1h 25m
2026-07-08 DAL597 CUN → ATL Jul 8, 19:30 UTCJul 8, 21:35 UTC2h 5m
2026-07-08 DAL598 ATL → CUN Jul 8, 15:40 UTCJul 8, 18:05 UTC2h 25m
2026-07-08 DAL598 ATL → CUN Jul 8, 15:37 UTCJul 8, 17:46 UTC2h 9m
2026-07-08 DAL1315 - Jul 8, 12:10 UTCJul 8, 13:45 UTC1h 35m
2026-07-07 DAL1131 - Jul 7, 23:05 UTCJul 8, 00:55 UTC1h 50m
2026-07-07 DAL1131 ATL → IAH Jul 7, 23:01 UTCJul 8, 00:49 UTC1h 48m
2026-07-07 DAL2312 EWR → ATL Jul 7, 19:55 UTCJul 7, 21:45 UTC1h 50m
2026-07-07 DAL2312 ATL → EWR Jul 7, 16:15 UTCJul 7, 18:00 UTC1h 45m
2026-07-07 DAL2365 MSP → SFO Jul 7, 12:51 UTCJul 7, 14:35 UTC1h 44m
2026-07-07 DAL2365 MSP → SFO Jul 7, 12:55 UTCJul 7, 14:40 UTC1h 45m
2026-07-07 DAL2527 ATL → EWR Jul 7, 02:20 UTCJul 7, 04:00 UTC1h 40m
2026-07-06 DAL1848 ATL → ATL Jul 6, 14:25 UTCJul 6, 23:20 UTC8h 55m
2026-07-06 DAL2080 MCO → ATL Jul 6, 11:40 UTCJul 6, 12:40 UTC1h 0m
2026-07-06 DAL1735 ATL → MCO Jul 6, 02:05 UTCJul 6, 03:05 UTC1h 0m
2026-07-05 DAL838 - Jul 5, 21:20 UTCJul 5, 22:45 UTC1h 25m
2026-07-05 DAL838 - Jul 5, 18:10 UTCJul 5, 19:30 UTC1h 20m
2026-07-05 DAL1227 IAH → LGA Jul 5, 15:25 UTCJul 5, 16:25 UTC1h 0m
2026-07-05 DAL1227 IAH → LGA Jul 5, 12:50 UTCJul 5, 13:55 UTC1h 5m
2026-07-04 DAL1030 MCO → ATL Jul 4, 18:15 UTCJul 4, 19:15 UTC1h 0m

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 N334DN page for operator, model, and routing details .

Mode-S A3A503 frequently asked

What is Mode-S code A3A503?
A3A503 is an ICAO 24-bit transponder address. Allocated to United States. Assigned to N334DN.
Where is Mode-S A3A503 registered?
Mode-S code A3A503 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 A3A503 broadcasting right now?
No active broadcast right now. Last signal was 4h ago.
Hex, octal, and decimal Mode-S codes: what's the difference?
The same 24-bit identifier expressed in different bases: hex A3A503, octal 50722403, decimal 10,724,611.
What flights does A3A503 operate?
Mode-S A3A503 has broadcast 20 distinct callsigns, including DAL1137, DAL1631, DAL838, DAL1167, DAL1100.