Apparatus

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sensors Mode-S transponder

A50ADC

ICAO 24-bit transponder address · allocated to United States

Currently assigned to N424DX · AIRBUS A-330-900 · operated by DELTA AIR LINES INC

Hex
A50ADC
Octal
51205334
Decimal
10,816,220
Country
US
Tail
N424DX
Type
A339
No current signal · last broadcast 49m ago
Flights observed
268
Distinct callsigns
20
Country
US
Last broadcast
49m ago

Last known position

Most recent position reported by Mode-S A50ADC.

Country allocation

The ICAO 24-bit address A50ADC 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
DAL223 - 11 2026-06-16
DAL17 Delta Air Lines 10 2026-07-05
DAL240 Delta Air Lines 9 2026-06-15
DAL59 Delta Air Lines 8 2026-05-28
DAL297 - 8 2026-07-12
DAL222 - 8 2026-06-19
DAL16 - 8 2026-07-04
DAL62 - 7 2026-07-07
DAL298 Delta Air Lines 7 2026-06-07
DAL225 - 7 2026-07-07
DAL215 - 7 2026-07-09
DAL113 Delta Air Lines 7 2026-05-02
DAL58 Delta Air Lines 6 2026-05-26
DAL296 - 6 2026-07-11
DAL214 - 6 2026-07-08
DAL70 Delta Air Lines 5 2026-05-06
DAL299 Delta Air Lines 5 2026-06-07
DAL257 - 5 2026-06-22
DAL241 - 5 2026-06-20
DAL224 - 5 2026-06-21

Recent flights last 50

DateFlightRouteTakeoffLandingDuration
2026-07-14 DAL108 - Jul 14, 03:30 UTCJul 14, 05:00 UTC1h 30m
2026-07-13 DAL175 MXP → ATL Jul 13, 11:57 UTCJul 13, 21:32 UTC9h 35m
2026-07-13 DAL175 MXP → ATL Jul 13, 12:00 UTCJul 13, 21:35 UTC9h 35m
2026-07-12 DAL174 ATL → MXP Jul 12, 23:30 UTCJul 13, 08:20 UTC8h 50m
2026-07-12 DAL297 - Jul 12, 09:20 UTCJul 12, 12:50 UTC3h 30m
2026-07-12 DAL297 ATH → ATL Jul 12, 09:21 UTCJul 12, 20:40 UTC11h 19m
2026-07-11 DAL296 ATL → ATH Jul 11, 20:27 UTCJul 12, 07:10 UTC10h 43m
2026-07-11 DAL296 ATL → ATH Jul 11, 20:30 UTCJul 12, 07:10 UTC10h 40m
2026-07-11 DAL104 - Jul 11, 02:15 UTCJul 11, 11:25 UTC9h 10m
2026-07-09 DAL105 ATL → GRU Jul 9, 23:55 UTCJul 10, 08:25 UTC8h 30m
2026-07-09 DAL215 - Jul 9, 08:25 UTCJul 9, 18:35 UTC10h 10m
2026-07-08 DAL214 ATL → FCO Jul 8, 20:15 UTCJul 9, 05:35 UTC9h 20m
2026-07-08 DAL109 MAD → ATL Jul 8, 08:10 UTCJul 8, 16:50 UTC8h 40m
2026-07-07 DAL62 - Jul 7, 21:50 UTCJul 8, 04:05 UTC6h 15m
2026-07-07 DAL225 - Jul 7, 10:05 UTCJul 7, 11:40 UTC1h 35m
2026-07-07 DAL225 CDG → BOS Jul 7, 10:02 UTCJul 7, 16:51 UTC6h 49m
2026-07-07 DAL225 CDG → BOS Jul 7, 10:02 UTCJul 7, 17:04 UTC7h 2m
2026-07-06 DAL220 SLC → CDG Jul 6, 22:00 UTCJul 7, 07:35 UTC9h 35m
2026-07-06 DAL57 AMS → SLC Jul 6, 09:05 UTCJul 6, 19:05 UTC10h 0m
2026-07-05 DAL132 - Jul 5, 21:45 UTCJul 6, 03:00 UTC5h 15m
2026-07-05 DAL132 DTW → AMS Jul 5, 21:41 UTCJul 6, 04:31 UTC6h 50m
2026-07-05 DAL17 LHR → DTW Jul 5, 10:00 UTCJul 5, 17:50 UTC7h 50m
2026-07-05 DAL17 LHR → DTW Jul 5, 09:58 UTCJul 5, 17:49 UTC7h 51m
2026-07-04 DAL16 - Jul 4, 23:05 UTCJul 5, 05:45 UTC6h 40m
2026-07-04 DAL207 - Jul 4, 07:15 UTCJul 4, 09:00 UTC1h 45m
2026-07-04 DAL207 FCO → DTW Jul 4, 07:15 UTCJul 4, 17:01 UTC9h 46m
2026-07-03 DAL112 BOS → FCO Jul 3, 21:20 UTCJul 4, 04:40 UTC7h 20m
2026-07-03 DAL225 - Jul 3, 11:10 UTCJul 3, 12:20 UTC1h 10m
2026-07-03 DAL225 CDG → BOS Jul 3, 11:09 UTCJul 3, 18:23 UTC7h 14m
2026-07-03 DAL225 CDG → BOS Jul 3, 11:09 UTCJul 3, 18:32 UTC7h 23m
2026-07-02 DAL220 SLC → CDG Jul 2, 21:50 UTCJul 3, 06:55 UTC9h 5m
2026-07-02 DAL57 - Jul 2, 09:25 UTCJul 2, 14:15 UTC4h 50m
2026-07-02 DAL57 AMS → SLC Jul 2, 09:23 UTCJul 2, 19:10 UTC9h 47m
2026-07-01 DAL142 SEA → AMS Jul 1, 21:26 UTCJul 2, 06:27 UTC9h 1m
2026-07-01 DAL142 SEA → AMS Jul 1, 21:30 UTCJul 1, 22:55 UTC1h 25m
2026-07-01 DAL143 AMS → SEA Jul 1, 09:05 UTCJul 1, 18:40 UTC9h 35m
2026-06-30 DAL242 - Jun 30, 23:30 UTCJul 1, 05:40 UTC6h 10m
2026-06-30 DAL63 FCO → ATL Jun 30, 13:15 UTCJun 30, 20:15 UTC7h 0m
2026-06-30 DAL108 - Jun 30, 02:00 UTCJun 30, 10:05 UTC8h 5m
2026-06-29 DAL297 SPN → NRT Jun 29, 09:54 UTCJun 29, 20:59 UTC11h 5m
2026-06-29 DAL297 SPN → NRT Jun 29, 09:50 UTCJun 29, 21:11 UTC11h 21m
2026-06-28 DAL296 HND → ATL Jun 28, 20:25 UTCJun 29, 06:24 UTC10h 0m
2026-06-27 DAL297 SPN → NRT Jun 27, 08:44 UTCJun 27, 20:09 UTC11h 25m
2026-06-26 DAL296 HND → ATL Jun 26, 19:50 UTCJun 27, 05:49 UTC10h 0m
2026-06-25 DAL55 - Jun 25, 05:50 UTCJun 25, 22:59 UTC17h 10m
2026-06-24 DAL55 - Jun 24, 23:04 UTCJun 25, 22:59 UTC23h 55m
2026-06-24 DAL54 - Jun 24, 22:00 UTCJun 25, 15:10 UTC17h 10m
2026-06-24 DAL215 - Jun 24, 08:20 UTCJun 24, 18:39 UTC10h 20m
2026-06-23 DAL214 ATL → FCO Jun 23, 20:10 UTCJun 24, 05:24 UTC9h 15m
2026-06-23 DAL109 MAD → ATL Jun 23, 08:20 UTCJun 23, 17:20 UTC9h 0m

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 N424DX page for operator, model, and routing details .

Mode-S A50ADC frequently asked

What is Mode-S code A50ADC?
A50ADC is an ICAO 24-bit transponder address. Allocated to United States. Assigned to N424DX.
Where is Mode-S A50ADC registered?
Mode-S code A50ADC 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 A50ADC broadcasting right now?
No active broadcast right now. Last signal was 49m ago.
Hex, octal, and decimal Mode-S codes: what's the difference?
The same 24-bit identifier expressed in different bases: hex A50ADC, octal 51205334, decimal 10,816,220.
What flights does A50ADC operate?
Mode-S A50ADC has broadcast 20 distinct callsigns, including DAL223, DAL17, DAL240, DAL59, DAL297.