Apparatus

Try JFK, AAL1290, BAW, or N225AN.

sensors Mode-S transponder

AD23D5

ICAO 24-bit transponder address · allocated to United States

Currently assigned to N946DZ · operated by DELTA AIR LINES INC

Hex
AD23D5
Octal
53221725
Decimal
11,346,901
Country
US
Tail
N946DZ
Type
B739
No current signal · last broadcast Jul 26, 20:55 UTC
Flights observed
696
Distinct callsigns
20
Country
US
Last broadcast
Jul 26, 20:55 UTC

Last known position

Most recent position reported by Mode-S AD23D5.

Country allocation

The ICAO 24-bit address AD23D5 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
DAL2471 - 32 2026-07-19
DAL3107 - 27 2026-07-16
DAL1660 Delta Air Lines 20 2026-06-02
DAL1470 Delta Air Lines 20 2026-07-24
DAL1381 - 20 2026-07-09
DAL2827 Delta Air Lines 19 2026-07-24
DAL3110 - 18 2026-07-18
DAL2908 Delta Air Lines 16 2026-05-21
DAL1130 - 16 2026-07-10
DAL2547 - 15 2026-07-15
DAL1488 Delta Air Lines 14 2026-07-25
DAL3103 Delta Air Lines 13 2026-07-24
DAL1750 Delta Air Lines 13 2026-07-18
DAL1482 - 13 2026-07-16
DAL3198 Delta Air Lines 12 2026-06-11
DAL3196 - 12 2026-06-27
DAL3154 - 12 2026-07-11
DAL3083 Delta Air Lines 12 2026-05-21
DAL3023 Delta Air Lines 12 2026-06-05
DAL1212 Delta Air Lines 12 2026-07-25

Recent flights last 50

DateFlightRouteTakeoffLandingDuration
2026-07-26 DAL1067 SEA → AUS Jul 26, 20:05 UTCJul 26, 20:45 UTC40m
2026-07-26 DAL1067 SEA → AUS Jul 26, 18:05 UTCJul 26, 18:45 UTC40m
2026-07-26 DAL3091 ATL → CHS Jul 26, 15:25 UTCJul 26, 16:10 UTC45m
2026-07-26 DAL3091 ATL → CHS Jul 26, 13:15 UTCJul 26, 14:00 UTC45m
2026-07-25 DAL552 LAX → BOS Jul 25, 23:40 UTCJul 26, 00:35 UTC55m
2026-07-25 DAL552 LAX → BOS Jul 25, 20:40 UTCJul 25, 21:30 UTC50m
2026-07-25 DAL1488 BOS → TPA Jul 25, 18:00 UTCJul 25, 18:55 UTC55m
2026-07-25 DAL1488 BOS → TPA Jul 25, 17:55 UTCJul 25, 18:51 UTC56m
2026-07-25 DAL1488 BOS → TPA Jul 25, 15:35 UTCJul 25, 16:30 UTC55m
2026-07-25 DAL1212 DCA → ATL Jul 25, 12:20 UTCJul 25, 13:55 UTC1h 35m
2026-07-25 DAL1212 DCA → ATL Jul 25, 12:16 UTCJul 25, 13:52 UTC1h 36m
2026-07-24 DAL1470 BOS → RDU Jul 24, 22:55 UTCJul 25, 00:35 UTC1h 40m
2026-07-24 DAL2827 DAB → ATL Jul 24, 19:45 UTCJul 24, 20:40 UTC55m
2026-07-24 DAL2827 DAB → ATL Jul 24, 17:10 UTCJul 24, 18:05 UTC55m
2026-07-24 DAL3103 ATL → PNS Jul 24, 14:50 UTCJul 24, 15:45 UTC55m
2026-07-24 DAL3103 ATL → PNS Jul 24, 14:47 UTCJul 24, 15:41 UTC54m
2026-07-24 DAL3103 ATL → PNS Jul 24, 12:40 UTCJul 24, 13:25 UTC45m
2026-07-23 DAL1126 PDX → LAX Jul 23, 23:10 UTCJul 24, 00:10 UTC1h 0m
2026-07-23 DAL1126 PDX → LAX Jul 23, 23:06 UTCJul 24, 00:05 UTC59m
2026-07-23 DAL1126 PDX → LAX Jul 23, 20:40 UTCJul 23, 21:30 UTC50m
2026-07-23 DAL1488 - Jul 23, 18:15 UTCJul 23, 19:15 UTC1h 0m
2026-07-23 DAL1488 ATL → RDU Jul 23, 15:35 UTCJul 23, 16:30 UTC55m
2026-07-23 DAL1212 DCA → ATL Jul 23, 12:05 UTCJul 23, 13:35 UTC1h 30m
2026-07-22 DAL1470 BOS → RDU Jul 22, 22:15 UTCJul 22, 23:50 UTC1h 35m
2026-07-22 DAL2827 DAB → ATL Jul 22, 19:15 UTCJul 22, 20:05 UTC50m
2026-07-22 DAL2827 DAB → ATL Jul 22, 19:11 UTCJul 22, 20:03 UTC52m
2026-07-22 DAL2827 DAB → ATL Jul 22, 16:55 UTCJul 22, 18:00 UTC1h 5m
2026-07-22 DAL3103 ATL → PNS Jul 22, 14:25 UTCJul 22, 15:15 UTC50m
2026-07-22 DAL3103 ATL → PNS Jul 22, 12:15 UTCJul 22, 13:00 UTC45m
2026-07-21 DAL2484 - Jul 21, 22:40 UTCJul 21, 23:15 UTC35m
2026-07-21 DAL2484 - Jul 21, 20:45 UTCJul 21, 21:10 UTC25m
2026-07-21 DAL1488 - Jul 21, 18:05 UTCJul 21, 19:00 UTC55m
2026-07-21 DAL1488 RDU → ATL Jul 21, 18:00 UTCJul 21, 18:57 UTC57m
2026-07-21 DAL1488 ATL → RDU Jul 21, 15:20 UTCJul 21, 16:20 UTC1h 0m
2026-07-21 DAL1212 DCA → ATL Jul 21, 12:05 UTCJul 21, 13:40 UTC1h 35m
2026-07-20 DAL1470 BOS → RDU Jul 20, 22:05 UTCJul 20, 23:45 UTC1h 40m
2026-07-20 DAL1345 - Jul 20, 18:50 UTCJul 20, 19:55 UTC1h 5m
2026-07-20 DAL1345 - Jul 20, 16:05 UTCJul 20, 17:25 UTC1h 20m
2026-07-20 DAL1702 SAV → ATL Jul 20, 14:00 UTCJul 20, 14:40 UTC40m
2026-07-20 DAL2425 BOS → FLL Jul 20, 01:05 UTCJul 20, 01:45 UTC40m
2026-07-19 DAL1550 RDU → ATL Jul 19, 22:20 UTCJul 19, 23:15 UTC55m
2026-07-19 DAL1550 ATL → RDU Jul 19, 19:55 UTCJul 19, 20:55 UTC1h 0m
2026-07-19 DAL2471 - Jul 19, 15:55 UTCJul 19, 17:30 UTC1h 35m
2026-07-19 DAL2471 - Jul 19, 12:35 UTCJul 19, 14:10 UTC1h 35m
2026-07-19 DAL2124 ATL → BOS Jul 19, 10:30 UTCJul 19, 11:10 UTC40m
2026-07-18 DAL3179 - Jul 18, 22:30 UTCJul 18, 23:20 UTC50m
2026-07-18 DAL1750 MSP → MYR Jul 18, 20:05 UTCJul 18, 21:10 UTC1h 5m
2026-07-18 DAL1750 MSP → MYR Jul 18, 17:05 UTCJul 18, 18:45 UTC1h 40m
2026-07-18 DAL3110 - Jul 18, 14:05 UTCJul 18, 15:40 UTC1h 35m
2026-07-18 DAL3110 MCI → ATL Jul 18, 14:05 UTCJul 18, 15:41 UTC1h 36m

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 N946DZ page for operator, model, and routing details .

Mode-S AD23D5 frequently asked

What is Mode-S code AD23D5?
AD23D5 is an ICAO 24-bit transponder address. Allocated to United States. Assigned to N946DZ.
Where is Mode-S AD23D5 registered?
Mode-S code AD23D5 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 AD23D5 broadcasting right now?
No active broadcast right now. Last signal was Jul 26, 20:55 UTC.
Hex, octal, and decimal Mode-S codes: what's the difference?
The same 24-bit identifier expressed in different bases: hex AD23D5, octal 53221725, decimal 11,346,901.
What flights does AD23D5 operate?
Mode-S AD23D5 has broadcast 20 distinct callsigns, including DAL2471, DAL3107, DAL1660, DAL1470, DAL1381.