Apparatus

Try JFK, AAL1290, BAW, or N225AN.

sensors Mode-S transponder

AD03C4

ICAO 24-bit transponder address · allocated to United States

Currently assigned to N938DZ · operated by DELTA AIR LINES INC

Hex
AD03C4
Octal
53201704
Decimal
11,338,692
Country
US
Tail
N938DZ
Type
B739
No current signal · last broadcast 5h ago
Flights observed
567
Distinct callsigns
20
Country
US
Last broadcast
5h ago

Last known position

Most recent position reported by Mode-S AD03C4.

Country allocation

The ICAO 24-bit address AD03C4 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
DAL2052 Delta Air Lines 25 2026-07-10
DAL2952 - 15 2026-06-21
DAL2026 - 14 2026-07-13
DAL2071 - 13 2026-07-06
DAL3134 Delta Air Lines 12 2026-05-12
DAL2600 - 11 2026-07-04
DAL2542 - 11 2026-07-07
DAL3067 Delta Air Lines 10 2026-07-12
DAL3056 - 10 2026-07-12
DAL2867 - 10 2026-07-12
DAL2545 Delta Air Lines 10 2026-05-21
DAL552 - 9 2026-07-13
DAL1552 - 9 2026-06-24
DAL1353 - 9 2026-06-28
DAL3069 - 8 2026-07-09
DAL3013 Delta Air Lines 8 2026-05-31
DAL2978 - 8 2026-07-11
DAL2152 - 8 2026-07-06
DAL409 Delta Air Lines 7 2026-05-03
DAL3157 Delta Air Lines 7 2026-06-05

Recent flights last 50

DateFlightRouteTakeoffLandingDuration
2026-07-14 DAL1490 BNA → ATL Jul 14, 02:45 UTCJul 14, 03:25 UTC40m
2026-07-14 DAL1490 ATL → BNA Jul 14, 00:15 UTCJul 14, 01:30 UTC1h 15m
2026-07-13 DAL2026 RDU → ATL Jul 13, 21:00 UTCJul 13, 22:05 UTC1h 5m
2026-07-13 DAL2026 ATL → RDU Jul 13, 18:35 UTCJul 13, 19:35 UTC1h 0m
2026-07-13 DAL1699 - Jul 13, 15:50 UTCJul 13, 16:45 UTC55m
2026-07-13 DAL1699 ATL → RDU Jul 13, 13:30 UTCJul 13, 14:30 UTC1h 0m
2026-07-13 DAL2124 - Jul 13, 11:25 UTCJul 13, 12:10 UTC45m
2026-07-13 DAL2525 - Jul 13, 05:25 UTCJul 13, 06:10 UTC45m
2026-07-13 DAL2525 ATL → CHS Jul 13, 05:24 UTCJul 13, 06:08 UTC44m
2026-07-13 DAL552 - Jul 13, 01:30 UTCJul 13, 02:25 UTC55m
2026-07-13 DAL552 MEM → ATL Jul 13, 01:27 UTCJul 13, 02:23 UTC56m
2026-07-12 DAL552 - Jul 12, 23:15 UTCJul 13, 00:05 UTC50m
2026-07-12 DAL2867 - Jul 12, 20:10 UTCJul 12, 20:55 UTC45m
2026-07-12 DAL2867 ATL → BNA Jul 12, 17:45 UTCJul 12, 18:40 UTC55m
2026-07-12 DAL3067 PNS → ATL Jul 12, 15:40 UTCJul 12, 16:30 UTC50m
2026-07-12 DAL2807 ATL → PNS Jul 12, 06:20 UTCJul 12, 07:01 UTC40m
2026-07-12 DAL3056 - Jul 12, 03:01 UTCJul 12, 03:55 UTC55m
2026-07-11 DAL3056 - Jul 11, 23:45 UTCJul 12, 00:45 UTC1h 0m
2026-07-11 DAL2978 - Jul 11, 21:45 UTCJul 11, 22:15 UTC30m
2026-07-11 DAL2978 - Jul 11, 17:55 UTCJul 11, 20:15 UTC2h 20m
2026-07-11 DAL2978 ATL → CLE Jul 11, 13:15 UTCJul 11, 14:45 UTC1h 30m
2026-07-10 DAL1568 - Jul 10, 23:40 UTCJul 11, 00:55 UTC1h 15m
2026-07-10 DAL1568 - Jul 10, 20:20 UTCJul 10, 22:25 UTC2h 5m
2026-07-10 DAL2052 SLC → STL Jul 10, 17:20 UTCJul 10, 18:15 UTC55m
2026-07-10 DAL2052 SLC → STL Jul 10, 17:18 UTCJul 10, 18:12 UTC54m
2026-07-10 DAL2052 SLC → STL Jul 10, 14:25 UTCJul 10, 15:25 UTC1h 0m
2026-07-10 DAL1534 - Jul 10, 11:30 UTCJul 10, 12:35 UTC1h 5m
2026-07-10 DAL2224 ATL → MSY Jul 10, 04:20 UTCJul 10, 05:20 UTC1h 0m
2026-07-10 DAL1490 - Jul 10, 02:15 UTCJul 10, 02:55 UTC40m
2026-07-10 DAL1490 ATL → BNA Jul 10, 00:15 UTCJul 10, 00:55 UTC40m
2026-07-09 DAL2026 - Jul 9, 21:50 UTCJul 9, 22:45 UTC55m
2026-07-09 DAL2026 RDU → ATL Jul 9, 21:49 UTCJul 9, 22:43 UTC54m
2026-07-09 DAL2026 ATL → RDU Jul 9, 17:15 UTCJul 9, 18:15 UTC1h 0m
2026-07-09 DAL3069 - Jul 9, 14:55 UTCJul 9, 15:35 UTC40m
2026-07-09 DAL3069 ATL → BNA Jul 9, 12:35 UTCJul 9, 13:25 UTC50m
2026-07-08 DAL1568 - Jul 8, 22:30 UTCJul 8, 23:45 UTC1h 15m
2026-07-08 DAL1568 - Jul 8, 19:40 UTCJul 8, 20:50 UTC1h 10m
2026-07-08 DAL3198 - Jul 8, 17:10 UTCJul 8, 18:00 UTC50m
2026-07-08 DAL3198 ATL → PNS Jul 8, 15:00 UTCJul 8, 15:45 UTC45m
2026-07-08 DAL789 - Jul 8, 12:40 UTCJul 8, 13:20 UTC40m
2026-07-08 DAL789 CHS → ATL Jul 8, 12:36 UTCJul 8, 13:19 UTC43m
2026-07-08 DAL1663 - Jul 8, 01:55 UTCJul 8, 02:40 UTC45m
2026-07-07 DAL552 - Jul 7, 23:05 UTCJul 8, 00:00 UTC55m
2026-07-07 DAL552 - Jul 7, 20:45 UTCJul 7, 21:35 UTC50m
2026-07-07 DAL2542 MSY → ATL Jul 7, 18:15 UTCJul 7, 19:15 UTC1h 0m
2026-07-07 DAL2542 ATL → MSY Jul 7, 15:20 UTCJul 7, 16:20 UTC1h 0m
2026-07-07 DAL1674 - Jul 7, 12:55 UTCJul 7, 13:40 UTC45m
2026-07-07 DAL2494 ATL → ECP Jul 7, 00:50 UTCJul 7, 01:30 UTC40m
2026-07-06 DAL2152 - Jul 6, 21:25 UTCJul 6, 22:55 UTC1h 30m
2026-07-06 DAL2152 MKE → ATL Jul 6, 21:20 UTCJul 6, 22:52 UTC1h 32m

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 N938DZ page for operator, model, and routing details .

Mode-S AD03C4 frequently asked

What is Mode-S code AD03C4?
AD03C4 is an ICAO 24-bit transponder address. Allocated to United States. Assigned to N938DZ.
Where is Mode-S AD03C4 registered?
Mode-S code AD03C4 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 AD03C4 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 AD03C4, octal 53201704, decimal 11,338,692.
What flights does AD03C4 operate?
Mode-S AD03C4 has broadcast 20 distinct callsigns, including DAL2052, DAL2952, DAL2026, DAL2071, DAL3134.