Apparatus

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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
Broadcasting now · callsign DAL1700 · 5,150 ft
Flights observed
652
Distinct callsigns
20
Country
US
Last broadcast
Jul 26, 21:35 UTC

Current position

AD03C4 is currently broadcasting. Map zoomed to live position.

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 31 2026-07-26
DAL2952 - 15 2026-06-21
DAL552 - 14 2026-07-18
DAL2026 - 14 2026-07-13
DAL3067 - 13 2026-07-21
DAL2867 - 13 2026-07-17
DAL2071 - 13 2026-07-06
DAL1345 Delta Air Lines 13 2026-07-23
DAL3134 Delta Air Lines 12 2026-05-12
DAL1568 Delta Air Lines 12 2026-07-26
DAL2600 - 11 2026-07-04
DAL2542 - 11 2026-07-07
DAL3056 - 10 2026-07-12
DAL2545 Delta Air Lines 10 2026-05-21
DAL1534 Delta Air Lines 10 2026-07-24
DAL3095 - 9 2026-07-19
DAL1552 - 9 2026-06-24
DAL1353 - 9 2026-06-28
DAL3069 - 8 2026-07-09
DAL3013 Delta Air Lines 8 2026-05-31

Recent flights last 50

DateFlightRouteTakeoffLandingDuration
2026-07-26 DAL1568 DTW → ORD Jul 26, 20:20 UTCJul 26, 21:35 UTC1h 15m
2026-07-26 DAL2052 SLC → STL Jul 26, 18:00 UTCJul 26, 18:55 UTC55m
2026-07-26 DAL2052 SLC → STL Jul 26, 14:30 UTCJul 26, 15:35 UTC1h 5m
2026-07-26 DAL1547 SAT → DTW Jul 26, 11:50 UTCJul 26, 13:00 UTC1h 10m
2026-07-26 DAL1450 JFK → ATL Jul 26, 00:15 UTCJul 26, 01:30 UTC1h 15m
2026-07-25 DAL1246 MSP → BOS Jul 25, 20:10 UTCJul 25, 21:45 UTC1h 35m
2026-07-25 DAL1246 MSP → BOS Jul 25, 17:00 UTCJul 25, 18:35 UTC1h 35m
2026-07-25 DAL3129 PNS → ATL Jul 25, 13:50 UTCJul 25, 14:35 UTC45m
2026-07-25 DAL3086 ATL → TRI Jul 25, 03:20 UTCJul 25, 04:05 UTC45m
2026-07-24 DAL1568 DTW → ORD Jul 24, 23:20 UTCJul 25, 00:40 UTC1h 20m
2026-07-24 DAL1568 DTW → ORD Jul 24, 19:54 UTCJul 24, 21:10 UTC1h 16m
2026-07-24 DAL1568 DTW → ORD Jul 24, 19:55 UTCJul 24, 21:00 UTC1h 5m
2026-07-24 DAL2052 SLC → STL Jul 24, 17:00 UTCJul 24, 17:55 UTC55m
2026-07-24 DAL2052 SLC → STL Jul 24, 14:30 UTCJul 24, 15:25 UTC55m
2026-07-24 DAL1534 BOS → ATL Jul 24, 11:35 UTCJul 24, 12:45 UTC1h 10m
2026-07-24 DAL2224 ATL → MSY Jul 24, 03:25 UTCJul 24, 04:25 UTC1h 0m
2026-07-24 DAL1393 LAX → SEA Jul 24, 00:00 UTCJul 24, 01:10 UTC1h 10m
2026-07-23 DAL1393 LAX → SEA Jul 23, 21:25 UTCJul 23, 22:40 UTC1h 15m
2026-07-23 DAL1345 BOS → ORD Jul 23, 18:10 UTCJul 23, 19:40 UTC1h 30m
2026-07-23 DAL1345 BOS → ORD Jul 23, 15:20 UTCJul 23, 16:30 UTC1h 10m
2026-07-23 DAL1345 BOS → ORD Jul 23, 15:15 UTCJul 23, 16:28 UTC1h 13m
2026-07-23 DAL2522 LGA → TPA Jul 23, 12:40 UTCJul 23, 13:45 UTC1h 5m
2026-07-23 DAL1450 JFK → ATL Jul 23, 00:40 UTCJul 23, 01:50 UTC1h 10m
2026-07-22 DAL3195 MDT → ATL Jul 22, 21:45 UTCJul 22, 22:35 UTC50m
2026-07-22 DAL3195 MDT → ATL Jul 22, 21:40 UTCJul 22, 22:32 UTC52m
2026-07-22 DAL3195 MDT → ATL Jul 22, 19:25 UTCJul 22, 20:10 UTC45m
2026-07-22 DAL3035 - Jul 22, 17:05 UTCJul 22, 18:00 UTC55m
2026-07-22 DAL3035 - Jul 22, 14:55 UTCJul 22, 15:55 UTC1h 0m
2026-07-22 DAL3025 ATL → LIT Jul 22, 00:10 UTCJul 22, 01:10 UTC1h 0m
2026-07-21 DAL3025 ATL → LIT Jul 21, 22:00 UTCJul 21, 22:55 UTC55m
2026-07-21 DAL1345 BOS → ORD Jul 21, 18:20 UTCJul 21, 19:00 UTC40m
2026-07-21 DAL1345 BOS → ORD Jul 21, 18:17 UTCJul 21, 19:52 UTC1h 35m
2026-07-21 DAL1345 BOS → ORD Jul 21, 15:20 UTCJul 21, 16:35 UTC1h 15m
2026-07-21 DAL3067 - Jul 21, 13:15 UTCJul 21, 14:00 UTC45m
2026-07-21 DAL3086 ATL → TRI Jul 21, 02:00 UTCJul 21, 02:40 UTC40m
2026-07-20 DAL3152 - Jul 20, 22:40 UTCJul 20, 23:50 UTC1h 10m
2026-07-20 DAL3152 ATL → RIC Jul 20, 20:10 UTCJul 20, 21:20 UTC1h 10m
2026-07-20 DAL3198 - Jul 20, 17:35 UTCJul 20, 18:20 UTC45m
2026-07-20 DAL3198 ATL → PNS Jul 20, 15:35 UTCJul 20, 16:20 UTC45m
2026-07-20 DAL2124 ATL → BOS Jul 20, 13:35 UTCJul 20, 14:20 UTC45m
2026-07-20 DAL2124 ATL → BOS Jul 20, 13:35 UTCJul 20, 14:14 UTC39m
2026-07-20 DAL2493 - Jul 20, 00:25 UTCJul 20, 01:05 UTC40m
2026-07-19 DAL3095 - Jul 19, 22:10 UTCJul 19, 22:35 UTC25m
2026-07-19 DAL3095 GSP → ATL Jul 19, 22:06 UTCJul 19, 22:40 UTC34m
2026-07-19 DAL3095 - Jul 19, 20:15 UTCJul 19, 20:50 UTC35m
2026-07-19 DAL851 YYC → MSP Jul 19, 16:50 UTCJul 19, 17:40 UTC50m
2026-07-19 DAL851 YYC → MSP Jul 19, 16:46 UTCJul 19, 17:40 UTC54m
2026-07-19 DAL2937 - Jul 19, 14:25 UTCJul 19, 15:10 UTC45m
2026-07-19 DAL2478 - Jul 19, 11:55 UTCJul 19, 12:50 UTC55m
2026-07-19 DAL2478 RDU → ATL Jul 19, 11:54 UTCJul 19, 12:44 UTC50m

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?
Yes. Mode-S AD03C4 is currently airborne.
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, DAL552, DAL2026, DAL3067.