Apparatus

Try JFK, AAL1290, BAW, or N225AN.

sensors Mode-S transponder

A50725

ICAO 24-bit transponder address · allocated to United States

Currently assigned to N423DX · AIRBUS A-330-900 · operated by DELTA AIR LINES INC

Hex
A50725
Octal
51203445
Decimal
10,815,269
Country
US
Tail
N423DX
Type
A339
Broadcasting now · callsign DAL212 · 39,000 ft
Flights observed
151
Distinct callsigns
20
Country
US
Last broadcast
52m ago

Current position

A50725 is currently broadcasting. Map zoomed to live position.

Country allocation

The ICAO 24-bit address A50725 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
DAL241 Delta Air Lines 8 2026-05-12
DAL157 Delta Air Lines 8 2026-05-27
DAL67 Delta Air Lines 7 2026-05-04
DAL243 Delta Air Lines 7 2026-04-14
DAL273 Delta Air Lines 6 2026-05-28
DAL272 Delta Air Lines 6 2026-05-28
DAL212 Delta Air Lines 6 2026-05-30
DAL222 Delta Air Lines 5 2026-05-11
DAL221 Delta Air Lines 5 2026-04-26
DAL213 Delta Air Lines 5 2026-05-23
DAL203 Delta Air Lines 5 2026-05-29
DAL58 Delta Air Lines 4 2026-05-12
DAL299 Delta Air Lines 4 2026-04-15
DAL298 Delta Air Lines 4 2026-05-03
DAL242 - 4 2026-04-13
DAL227 Delta Air Lines 4 2026-05-24
DAL163 Delta Air Lines 4 2026-04-27
DAL156 Delta Air Lines 4 2026-05-15
DAL110 Delta Air Lines 4 2026-05-10
DAL101 Delta Air Lines 4 2026-05-10

Recent flights last 50

DateFlightRouteTakeoffLandingDuration
2026-05-30 DAL212 JFK → ATH May 30, 01:07 UTCMay 30, 10:07 UTC9h 0m
2026-05-30 DAL212 JFK → ATH May 30, 01:10 UTCMay 30, 02:45 UTC1h 35m
2026-05-29 DAL203 ATH → JFK May 29, 07:20 UTCMay 29, 17:05 UTC9h 45m
2026-05-28 DAL202 JFK → ATH May 28, 19:20 UTCMay 29, 04:20 UTC9h 0m
2026-05-28 DAL202 JFK → ATH May 28, 19:19 UTCMay 29, 04:15 UTC8h 56m
2026-05-28 DAL273 LIS → JFK May 28, 09:45 UTCMay 28, 16:40 UTC6h 55m
2026-05-28 DAL272 JFK → LIS May 28, 01:00 UTCMay 28, 07:10 UTC6h 10m
2026-05-27 DAL157 ACC → JFK May 27, 03:29 UTCMay 27, 20:30 UTC17h 0m
2026-05-26 DAL157 ACC → JFK May 26, 21:25 UTCMay 27, 20:30 UTC23h 5m
2026-05-25 DAL939 LGA → ATL May 25, 22:30 UTCMay 26, 03:09 UTC4h 40m
2026-05-25 DAL713 BOS → LAX May 25, 15:10 UTCMay 25, 20:24 UTC5h 15m
2026-05-25 DAL226 GRU → JFK May 25, 03:10 UTCMay 25, 12:45 UTC9h 35m
2026-05-24 DAL227 JFK → GRU May 24, 04:30 UTCMay 24, 07:45 UTC3h 15m
2026-05-24 DAL227 JFK → GRU May 24, 03:07 UTCMay 24, 12:09 UTC9h 2m
2026-05-24 DAL227 JFK → GRU May 24, 03:10 UTCMay 24, 03:30 UTC20m
2026-05-23 DAL213 ATH → JFK May 23, 23:00 UTCMay 23, 23:10 UTC10m
2026-05-23 DAL213 ATH → JFK May 23, 12:48 UTCMay 23, 22:43 UTC9h 55m
2026-05-23 DAL213 ATH → JFK May 23, 12:50 UTCMay 23, 15:15 UTC2h 25m
2026-05-23 DAL212 JFK → ATH May 23, 01:00 UTCMay 23, 09:33 UTC8h 33m
2026-05-23 DAL212 JFK → ATH May 23, 01:00 UTCMay 23, 02:30 UTC1h 29m
2026-05-22 DAL273 LIS → JFK May 22, 09:30 UTCMay 22, 17:00 UTC7h 30m
2026-05-22 DAL272 JFK → LIS May 22, 00:35 UTCMay 22, 06:37 UTC6h 2m
2026-05-22 DAL272 JFK → LIS May 22, 00:35 UTCMay 22, 02:10 UTC1h 35m
2026-05-21 DAL157 ACC → JFK May 21, 04:00 UTCMay 21, 19:50 UTC15h 50m
2026-05-20 DAL157 ACC → JFK May 20, 21:35 UTCMay 21, 19:50 UTC22h 15m
2026-05-20 DAL203 ATH → JFK May 20, 07:15 UTCMay 20, 09:15 UTC2h 0m
2026-05-20 DAL203 ATH → JFK May 20, 07:15 UTCMay 20, 17:37 UTC10h 22m
2026-05-19 DAL202 JFK → ATH May 19, 19:25 UTCMay 20, 04:20 UTC8h 55m
2026-05-18 DAL213 ATH → JFK May 18, 12:52 UTCMay 18, 22:56 UTC10h 4m
2026-05-18 DAL213 ATH → JFK May 18, 12:55 UTCMay 18, 17:15 UTC4h 20m
2026-05-18 DAL212 JFK → ATH May 18, 00:50 UTCMay 18, 02:35 UTC1h 45m
2026-05-18 DAL212 JFK → ATH May 18, 00:50 UTCMay 18, 09:29 UTC8h 39m
2026-05-17 DAL273 LIS → JFK May 17, 09:35 UTCMay 17, 10:05 UTC30m
2026-05-17 DAL273 LIS → JFK May 17, 09:35 UTCMay 17, 16:48 UTC7h 13m
2026-05-17 DAL272 JFK → LIS May 17, 00:30 UTCMay 17, 06:40 UTC6h 10m
2026-05-16 DAL157 ACC → JFK May 16, 11:46 UTCMay 16, 20:20 UTC8h 35m
2026-05-16 DAL157 ACC → JFK May 16, 04:05 UTCMay 16, 20:20 UTC16h 16m
2026-05-15 DAL156 JFK → ACC May 15, 21:40 UTCMay 16, 05:15 UTC7h 35m
2026-05-15 DAL156 JFK → ACC May 15, 21:37 UTCMay 16, 07:02 UTC9h 25m
2026-05-15 DAL203 ATH → JFK May 15, 07:20 UTCMay 15, 09:15 UTC1h 55m
2026-05-15 DAL203 ATH → JFK May 15, 07:20 UTCMay 15, 17:36 UTC10h 16m
2026-05-14 DAL240 BOS → ATH May 14, 19:35 UTCMay 15, 03:45 UTC8h 10m
2026-05-14 DAL59 LHR → BOS May 14, 09:00 UTCMay 14, 15:55 UTC6h 55m
2026-05-13 DAL16 DTW → LHR May 13, 22:45 UTCMay 14, 05:15 UTC6h 30m
2026-05-13 DAL16 DTW → LHR May 13, 22:45 UTCMay 14, 05:53 UTC7h 8m
2026-05-13 DAL17 LHR → DTW May 13, 10:30 UTCMay 13, 18:10 UTC7h 40m
2026-05-12 DAL58 BOS → LHR May 12, 23:25 UTCMay 13, 05:29 UTC6h 4m
2026-05-12 DAL58 BOS → LHR May 12, 23:25 UTCMay 13, 05:40 UTC6h 15m
2026-05-12 DAL241 ATH → BOS May 12, 20:20 UTCMay 12, 20:25 UTC5m
2026-05-12 DAL241 ATH → BOS May 12, 10:10 UTCMay 12, 11:15 UTC1h 5m

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 N423DX page for operator, model, and routing details .

Mode-S A50725 frequently asked

What is Mode-S code A50725?
A50725 is an ICAO 24-bit transponder address. Allocated to United States. Assigned to N423DX.
Where is Mode-S A50725 registered?
Mode-S code A50725 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 A50725 broadcasting right now?
Yes. Mode-S A50725 is currently airborne.
Hex, octal, and decimal Mode-S codes: what's the difference?
The same 24-bit identifier expressed in different bases: hex A50725, octal 51203445, decimal 10,815,269.
What flights does A50725 operate?
Mode-S A50725 has broadcast 20 distinct callsigns, including DAL241, DAL157, DAL67, DAL243, DAL273.