Apparatus

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sensors Mode-S transponder

AD3C78

ICAO 24-bit transponder address · allocated to United States

Currently assigned to N952DZ · operated by DELTA AIR LINES INC

Hex
AD3C78
Octal
53236170
Decimal
11,353,208
Country
US
Tail
N952DZ
Type
B739
No current signal · last broadcast Jul 26, 21:10 UTC
Flights observed
500
Distinct callsigns
20
Country
US
Last broadcast
Jul 26, 21:10 UTC

Last known position

Most recent position reported by Mode-S AD3C78.

Country allocation

The ICAO 24-bit address AD3C78 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
DAL1267 Delta Air Lines 7 2026-05-29
DAL2999 Delta Air Lines 6 2026-06-05
DAL904 Delta Air Lines 5 2026-06-12
DAL539 Delta Air Lines 5 2026-06-10
DAL2197 - 5 2026-07-07
DAL1738 - 5 2026-07-03
DAL1443 Delta Air Lines 5 2026-07-22
DAL1431 - 5 2026-06-27
DAL1380 Delta Air Lines 5 2026-07-22
DAL1109 Delta Air Lines 5 2026-06-05
DAL635 Delta Air Lines 4 2026-07-21
DAL481 Delta Air Lines 4 2026-04-17
DAL3086 Delta Air Lines 4 2026-06-06
DAL2946 - 4 2026-06-18
DAL2739 Delta Air Lines 4 2026-07-25
DAL2380 - 4 2026-06-25
DAL2340 Delta Air Lines 4 2026-04-22
DAL2228 - 4 2026-06-27
DAL1913 Delta Air Lines 4 2026-05-14
DAL1817 Delta Air Lines 4 2026-06-06

Recent flights last 50

DateFlightRouteTakeoffLandingDuration
2026-07-26 DAL2096 MKE → ATL Jul 26, 17:35 UTCJul 26, 21:05 UTC3h 30m
2026-07-26 DAL891 MSP → MEM Jul 26, 11:50 UTCJul 26, 15:25 UTC3h 35m
2026-07-26 DAL790 ATL → LGA Jul 26, 01:15 UTCJul 26, 01:55 UTC40m
2026-07-25 DAL2739 ATL → BDL Jul 25, 20:40 UTCJul 25, 22:50 UTC2h 10m
2026-07-25 DAL2739 ATL → BDL Jul 25, 17:05 UTCJul 25, 18:55 UTC1h 50m
2026-07-25 DAL2554 BDL → ATL Jul 25, 13:15 UTCJul 25, 15:20 UTC2h 5m
2026-07-25 DAL2765 CVG → TPA Jul 25, 00:45 UTCJul 25, 02:40 UTC1h 55m
2026-07-25 DAL2765 CVG → TPA Jul 25, 00:43 UTCJul 25, 02:35 UTC1h 52m
2026-07-24 DAL1804 GDL → ATL Jul 24, 14:10 UTCJul 24, 22:10 UTC8h 0m
2026-07-24 DAL1664 EGE → ATL Jul 24, 11:30 UTCJul 24, 12:15 UTC45m
2026-07-24 DAL2850 SJC → ATL Jul 24, 03:30 UTCJul 24, 04:10 UTC40m
2026-07-24 DAL2850 SJC → ATL Jul 24, 03:26 UTCJul 24, 04:09 UTC43m
2026-07-23 DAL2206 JAX → LGA Jul 23, 21:20 UTCJul 24, 01:30 UTC4h 10m
2026-07-23 DAL2206 JAX → LGA Jul 23, 21:17 UTCJul 24, 01:30 UTC4h 13m
2026-07-23 DAL2206 JAX → LGA Jul 23, 15:25 UTCJul 23, 19:55 UTC4h 30m
2026-07-23 DAL2299 IAH → DTW Jul 23, 12:25 UTCJul 23, 13:20 UTC55m
2026-07-23 DAL3093 ATL → SDF Jul 23, 00:20 UTCJul 23, 01:10 UTC50m
2026-07-22 DAL1443 ATL → EWR Jul 22, 20:40 UTCJul 22, 22:10 UTC1h 30m
2026-07-22 DAL1443 ATL → EWR Jul 22, 17:40 UTCJul 22, 19:15 UTC1h 35m
2026-07-22 DAL1380 BOS → LGA Jul 22, 14:15 UTCJul 22, 15:25 UTC1h 10m
2026-07-22 DAL1380 BOS → LGA Jul 22, 14:12 UTCJul 22, 15:24 UTC1h 12m
2026-07-22 DAL1380 BOS → LGA Jul 22, 11:35 UTCJul 22, 12:50 UTC1h 15m
2026-07-22 DAL878 RDU → LGA Jul 22, 05:10 UTCJul 22, 05:25 UTC15m
2026-07-21 DAL743 ATL → SMF Jul 21, 22:20 UTCJul 22, 02:35 UTC4h 15m
2026-07-21 DAL1437 BOS → ATL Jul 21, 19:35 UTCJul 21, 20:50 UTC1h 15m
2026-07-21 DAL1437 BOS → ATL Jul 21, 19:30 UTCJul 21, 20:45 UTC1h 15m
2026-07-21 DAL1437 BOS → ATL Jul 21, 17:05 UTCJul 21, 18:10 UTC1h 5m
2026-07-21 DAL1380 BOS → LGA Jul 21, 14:25 UTCJul 21, 15:40 UTC1h 15m
2026-07-21 DAL1380 BOS → LGA Jul 21, 11:40 UTCJul 21, 12:55 UTC1h 15m
2026-07-21 DAL635 BOS → DFW Jul 21, 05:15 UTCJul 21, 09:05 UTC3h 50m
2026-07-20 DAL704 DAL → ATL Jul 20, 23:35 UTCJul 21, 03:30 UTC3h 55m
2026-07-20 DAL1246 - Jul 20, 20:10 UTCJul 20, 21:45 UTC1h 35m
2026-07-20 DAL1246 ATL → MKE Jul 20, 17:00 UTCJul 20, 18:35 UTC1h 35m
2026-07-20 DAL3125 - Jul 20, 14:30 UTCJul 20, 15:35 UTC1h 5m
2026-07-20 DAL3125 ATL → IND Jul 20, 11:45 UTCJul 20, 12:50 UTC1h 5m
2026-07-19 DAL560 SFO → ATL Jul 19, 23:25 UTCJul 20, 03:30 UTC4h 5m
2026-07-19 DAL629 ATL → SEA Jul 19, 16:55 UTCJul 19, 21:35 UTC4h 40m
2026-07-19 DAL3100 - Jul 19, 14:40 UTCJul 19, 15:15 UTC35m
2026-07-19 DAL3100 - Jul 19, 12:40 UTCJul 19, 13:10 UTC30m
2026-07-18 DAL1871 SJD → SLC Jul 18, 20:59 UTCJul 19, 01:20 UTC4h 21m
2026-07-18 DAL1871 SJD → SLC Jul 18, 21:00 UTCJul 19, 01:25 UTC4h 25m
2026-07-18 DAL2470 ATL → YVR Jul 18, 14:20 UTCJul 18, 19:00 UTC4h 40m
2026-07-18 DAL3001 - Jul 18, 11:30 UTCJul 18, 12:10 UTC40m
2026-07-18 DAL858 LAX → BNA Jul 18, 01:39 UTCJul 18, 05:25 UTC3h 46m
2026-07-17 DAL355 - Jul 17, 20:20 UTCJul 18, 00:19 UTC4h 0m
2026-07-17 DAL2214 - Jul 17, 15:40 UTCJul 17, 18:40 UTC3h 0m
2026-07-17 DAL2214 SLC → BNA Jul 17, 15:37 UTCJul 17, 18:41 UTC3h 4m
2026-07-17 DAL1440 GEG → SLC Jul 17, 12:40 UTCJul 17, 13:55 UTC1h 15m
2026-07-17 DAL2418 MSP → GEG Jul 17, 03:30 UTCJul 17, 06:20 UTC2h 50m
2026-07-17 DAL2418 MSP → GEG Jul 17, 03:26 UTCJul 17, 06:10 UTC2h 44m

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 N952DZ page for operator, model, and routing details .

Mode-S AD3C78 frequently asked

What is Mode-S code AD3C78?
AD3C78 is an ICAO 24-bit transponder address. Allocated to United States. Assigned to N952DZ.
Where is Mode-S AD3C78 registered?
Mode-S code AD3C78 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 AD3C78 broadcasting right now?
No active broadcast right now. Last signal was Jul 26, 21:10 UTC.
Hex, octal, and decimal Mode-S codes: what's the difference?
The same 24-bit identifier expressed in different bases: hex AD3C78, octal 53236170, decimal 11,353,208.
What flights does AD3C78 operate?
Mode-S AD3C78 has broadcast 20 distinct callsigns, including DAL1267, DAL2999, DAL904, DAL539, DAL2197.