Apparatus

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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 5h ago
Flights observed
619
Distinct callsigns
20
Country
US
Last broadcast
5h ago

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 - 30 2026-07-08
DAL3107 - 23 2026-07-13
DAL1660 Delta Air Lines 20 2026-06-02
DAL1381 - 20 2026-07-09
DAL3110 - 16 2026-07-10
DAL2908 Delta Air Lines 16 2026-05-21
DAL1470 - 16 2026-06-27
DAL1130 - 16 2026-07-10
DAL2547 - 13 2026-06-24
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
DAL3153 Delta Air Lines 11 2026-06-04
DAL2827 - 11 2026-06-28
DAL1750 - 11 2026-07-10
DAL1482 - 11 2026-07-14
DAL3179 - 9 2026-07-07
DAL3105 Delta Air Lines 9 2026-06-04

Recent flights last 50

DateFlightRouteTakeoffLandingDuration
2026-07-14 DAL1482 ATL → IND Jul 14, 02:15 UTCJul 14, 03:20 UTC1h 5m
2026-07-13 DAL2174 - Jul 13, 23:20 UTCJul 14, 00:15 UTC55m
2026-07-13 DAL2174 CHS → ATL Jul 13, 23:15 UTCJul 14, 00:03 UTC48m
2026-07-13 DAL2174 - Jul 13, 21:00 UTCJul 13, 21:55 UTC55m
2026-07-13 DAL3107 - Jul 13, 17:35 UTCJul 13, 19:10 UTC1h 35m
2026-07-13 DAL3107 - Jul 13, 14:55 UTCJul 13, 15:45 UTC50m
2026-07-13 DAL1901 - Jul 13, 12:20 UTCJul 13, 13:25 UTC1h 5m
2026-07-13 DAL1482 ATL → IND Jul 13, 02:55 UTCJul 13, 04:11 UTC1h 16m
2026-07-13 DAL1482 ATL → IND Jul 13, 02:55 UTCJul 13, 04:15 UTC1h 20m
2026-07-12 DAL3126 - Jul 12, 23:05 UTCJul 13, 00:20 UTC1h 15m
2026-07-12 DAL3126 ATL → IND Jul 12, 20:10 UTCJul 12, 21:10 UTC1h 0m
2026-07-12 DAL3107 - Jul 12, 17:25 UTCJul 12, 18:25 UTC1h 0m
2026-07-12 DAL3107 CHS → ATL Jul 12, 17:24 UTCJul 12, 18:06 UTC42m
2026-07-12 DAL3107 - Jul 12, 15:20 UTCJul 12, 16:05 UTC45m
2026-07-12 DAL1901 IND → ATL Jul 12, 12:55 UTCJul 12, 14:01 UTC1h 5m
2026-07-12 DAL1482 ATL → IND Jul 12, 02:23 UTCJul 12, 03:25 UTC1h 2m
2026-07-12 DAL1482 - Jul 12, 02:25 UTCJul 12, 03:15 UTC50m
2026-07-11 DAL1443 - Jul 11, 21:15 UTCJul 11, 23:00 UTC1h 45m
2026-07-11 DAL1443 MCI → ATL Jul 11, 21:13 UTCJul 11, 22:54 UTC1h 41m
2026-07-11 DAL1443 - Jul 11, 18:20 UTCJul 11, 20:00 UTC1h 40m
2026-07-11 DAL1699 - Jul 11, 15:15 UTCJul 11, 16:15 UTC1h 0m
2026-07-11 DAL1699 ATL → RDU Jul 11, 12:50 UTCJul 11, 13:50 UTC1h 0m
2026-07-11 DAL3154 - Jul 11, 10:10 UTCJul 11, 11:05 UTC55m
2026-07-11 DAL3154 DAB → ATL Jul 11, 10:07 UTCJul 11, 11:04 UTC57m
2026-07-11 DAL2810 - Jul 11, 03:35 UTCJul 11, 04:35 UTC1h 0m
2026-07-11 DAL527 SAV → ATL Jul 11, 00:20 UTCJul 11, 01:05 UTC45m
2026-07-10 DAL527 ATL → SAV Jul 10, 22:30 UTCJul 10, 23:10 UTC40m
2026-07-10 DAL1750 - Jul 10, 19:35 UTCJul 10, 20:40 UTC1h 5m
2026-07-10 DAL1750 ATL → CMH Jul 10, 17:10 UTCJul 10, 18:15 UTC1h 5m
2026-07-10 DAL3110 - Jul 10, 14:15 UTCJul 10, 15:50 UTC1h 35m
2026-07-10 DAL1130 - Jul 10, 00:35 UTCJul 10, 02:15 UTC1h 40m
2026-07-09 DAL1381 - Jul 9, 22:00 UTCJul 9, 23:00 UTC1h 0m
2026-07-09 DAL1381 CHS → ATL Jul 9, 21:58 UTCJul 9, 22:54 UTC56m
2026-07-09 DAL1381 - Jul 9, 19:00 UTCJul 9, 19:45 UTC45m
2026-07-09 DAL1363 PIT → ATL Jul 9, 16:05 UTCJul 9, 17:25 UTC1h 20m
2026-07-09 DAL1363 - Jul 9, 13:10 UTCJul 9, 14:25 UTC1h 15m
2026-07-09 DAL1702 - Jul 9, 10:50 UTCJul 9, 11:30 UTC40m
2026-07-09 DAL2425 ATL → SAV Jul 9, 00:20 UTCJul 9, 01:00 UTC40m
2026-07-09 DAL2425 ATL → SAV Jul 9, 00:16 UTCJul 9, 01:00 UTC44m
2026-07-08 DAL1550 - Jul 8, 21:40 UTCJul 8, 22:35 UTC55m
2026-07-08 DAL1550 ATL → RDU Jul 8, 19:05 UTCJul 8, 20:05 UTC1h 0m
2026-07-08 DAL2471 - Jul 8, 15:50 UTCJul 8, 17:30 UTC1h 40m
2026-07-08 DAL2471 - Jul 8, 12:50 UTCJul 8, 14:20 UTC1h 30m
2026-07-08 DAL2124 - Jul 8, 10:20 UTCJul 8, 11:00 UTC40m
2026-07-07 DAL3179 ATL → CHS Jul 7, 22:00 UTCJul 7, 22:45 UTC45m
2026-07-07 DAL3179 ATL → CHS Jul 7, 22:00 UTCJul 7, 22:43 UTC43m
2026-07-07 DAL1750 - Jul 7, 18:50 UTCJul 7, 19:55 UTC1h 5m
2026-07-07 DAL1750 ATL → CMH Jul 7, 16:15 UTCJul 7, 17:15 UTC1h 0m
2026-07-07 DAL3110 - Jul 7, 13:05 UTCJul 7, 14:40 UTC1h 35m
2026-07-07 DAL1130 - Jul 7, 00:00 UTCJul 7, 01:35 UTC1h 35m

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 5h ago.
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, DAL1381, DAL3110.