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
Broadcasting now · callsign DAL222 · 39,000 ft
Flights observed
311
Distinct callsigns
20
Country
US
Last broadcast
Jul 26, 21:20 UTC

Current position

A50ADC is currently broadcasting. Map zoomed to live position.

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 Delta Air Lines 12 2026-07-22
DAL240 - 11 2026-07-21
DAL225 Delta Air Lines 11 2026-07-21
DAL17 Delta Air Lines 10 2026-07-05
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
DAL215 - 7 2026-07-09
DAL113 Delta Air Lines 7 2026-05-02
DAL58 Delta Air Lines 6 2026-05-26
DAL57 Delta Air Lines 6 2026-07-20
DAL296 - 6 2026-07-11
DAL242 Delta Air Lines 6 2026-07-18
DAL220 - 6 2026-07-20
DAL214 - 6 2026-07-08
DAL108 - 6 2026-07-14
DAL70 Delta Air Lines 5 2026-05-06

Recent flights last 50

DateFlightRouteTakeoffLandingDuration
2026-07-26 DAL202 JFK → ATH Jul 26, 19:45 UTCJul 26, 21:20 UTC1h 35m
2026-07-26 DAL273 LIS → JFK Jul 26, 09:10 UTCJul 26, 15:50 UTC6h 40m
2026-07-26 DAL273 LIS → JFK Jul 26, 09:10 UTCJul 26, 15:50 UTC6h 40m
2026-07-26 DAL272 JFK → LIS Jul 26, 00:10 UTCJul 26, 06:35 UTC6h 26m
2026-07-26 DAL272 JFK → LIS Jul 26, 00:05 UTCJul 26, 06:37 UTC6h 32m
2026-07-25 DAL47 AMS → JFK Jul 25, 12:50 UTCJul 25, 14:30 UTC1h 40m
2026-07-25 DAL47 AMS → JFK Jul 25, 12:48 UTCJul 25, 20:10 UTC7h 22m
2026-07-25 DAL47 AMS → JFK Jul 25, 12:48 UTCJul 25, 20:17 UTC7h 29m
2026-07-25 DAL46 JFK → AMS Jul 25, 03:30 UTCJul 25, 09:55 UTC6h 25m
2026-07-24 DAL231 CDG → RDU Jul 24, 16:10 UTCJul 25, 00:35 UTC8h 25m
2026-07-24 DAL206 DTW → FCO Jul 24, 05:05 UTCJul 24, 11:00 UTC5h 55m
2026-07-24 DAL206 DTW → FCO Jul 24, 05:00 UTCJul 24, 13:24 UTC8h 24m
2026-07-24 DAL9960 JFK → ATL Jul 24, 00:50 UTCJul 24, 02:40 UTC1h 50m
2026-07-23 DAL1642 IAH → LGA Jul 23, 21:35 UTCJul 23, 22:40 UTC1h 5m
2026-07-23 DAL1642 IAH → LGA Jul 23, 18:55 UTCJul 23, 20:00 UTC1h 5m
2026-07-22 DAL223 ATH → ATL Jul 22, 10:20 UTCJul 22, 18:40 UTC8h 20m
2026-07-21 DAL240 BOS → ATH Jul 21, 19:56 UTCJul 22, 04:36 UTC8h 40m
2026-07-21 DAL240 BOS → ATH Jul 21, 20:00 UTCJul 22, 04:30 UTC8h 30m
2026-07-21 DAL225 CDG → BOS Jul 21, 10:15 UTCJul 21, 17:15 UTC7h 0m
2026-07-21 DAL225 CDG → BOS Jul 21, 10:10 UTCJul 21, 17:12 UTC7h 2m
2026-07-20 DAL220 - Jul 20, 21:55 UTCJul 21, 07:05 UTC9h 10m
2026-07-20 DAL220 SLC → CDG Jul 20, 21:51 UTCJul 21, 07:10 UTC9h 19m
2026-07-20 DAL57 AMS → SLC Jul 20, 09:31 UTCJul 20, 19:23 UTC9h 52m
2026-07-20 DAL57 AMS → SLC Jul 20, 09:35 UTCJul 20, 12:30 UTC2h 55m
2026-07-19 DAL142 SEA → AMS Jul 19, 21:25 UTCJul 20, 06:35 UTC9h 10m
2026-07-19 DAL143 - Jul 19, 09:25 UTCJul 19, 18:35 UTC9h 10m
2026-07-19 DAL143 - Jul 19, 08:45 UTCJul 19, 09:20 UTC35m
2026-07-18 DAL242 BOS → TLV Jul 18, 23:19 UTCJul 19, 05:44 UTC6h 25m
2026-07-18 DAL242 BOS → TLV Jul 18, 23:20 UTCJul 19, 05:45 UTC6h 25m
2026-07-18 DAL125 LIS → BOS Jul 18, 11:55 UTCJul 18, 18:40 UTC6h 45m
2026-07-18 DAL124 BOS → LIS Jul 18, 03:39 UTCJul 18, 09:32 UTC5h 53m
2026-07-18 DAL124 BOS → LIS Jul 18, 03:40 UTCJul 18, 09:00 UTC5h 20m
2026-07-17 DAL243 - Jul 17, 09:45 UTCJul 17, 16:44 UTC7h 0m
2026-07-17 DAL243 AMS → BOS Jul 17, 09:42 UTCJul 17, 16:43 UTC7h 1m
2026-07-16 DAL256 BOS → AMS Jul 16, 21:15 UTCJul 17, 03:34 UTC6h 20m
2026-07-16 DAL225 - Jul 16, 11:05 UTCJul 16, 12:44 UTC1h 40m
2026-07-16 DAL225 CDG → BOS Jul 16, 11:00 UTCJul 16, 18:05 UTC7h 5m
2026-07-15 DAL220 - Jul 15, 21:40 UTCJul 15, 23:50 UTC2h 10m
2026-07-15 DAL220 SLC → CDG Jul 15, 21:38 UTCJul 16, 07:22 UTC9h 44m
2026-07-15 DAL57 - Jul 15, 09:10 UTCJul 15, 19:00 UTC9h 50m
2026-07-14 DAL242 BOS → AMS Jul 14, 23:35 UTCJul 15, 06:10 UTC6h 35m
2026-07-14 DAL63 MAD → BOS Jul 14, 13:55 UTCJul 14, 21:15 UTC7h 20m
2026-07-14 DAL108 - Jul 14, 10:25 UTCJul 14, 11:45 UTC1h 20m
2026-07-14 DAL108 - Jul 14, 03:30 UTCJul 14, 05:05 UTC1h 35m
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

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?
Yes. Mode-S A50ADC is currently airborne.
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, DAL240, DAL225, DAL17, DAL59.