Apparatus

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sensors Mode-S transponder

A52736

ICAO 24-bit transponder address · allocated to United States

Currently assigned to N431DX · AIRBUS A-330-900 · operated by DELTA AIR LINES INC

Hex
A52736
Octal
51223466
Decimal
10,823,478
Country
US
Tail
N431DX
Type
A339
No current signal · last broadcast Jul 26, 21:30 UTC
Flights observed
329
Distinct callsigns
20
Country
US
Last broadcast
Jul 26, 21:30 UTC

Last known position

Most recent position reported by Mode-S A52736.

Country allocation

The ICAO 24-bit address A52736 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
DAL222 Delta Air Lines 15 2026-07-19
DAL240 - 14 2026-07-22
DAL67 Delta Air Lines 13 2026-07-24
DAL241 Delta Air Lines 13 2026-07-20
DAL110 - 12 2026-07-17
DAL66 Delta Air Lines 11 2026-07-23
DAL223 Delta Air Lines 11 2026-07-23
DAL221 Delta Air Lines 11 2026-07-21
DAL224 Delta Air Lines 9 2026-07-21
DAL243 - 8 2026-06-21
DAL215 - 8 2026-07-03
DAL101 - 8 2026-07-17
DAL56 - 7 2026-07-09
DAL10 Delta Air Lines 7 2026-06-08
DAL296 Delta Air Lines 6 2026-07-25
DAL257 - 6 2026-07-11
DAL163 Delta Air Lines 6 2026-05-08
DAL57 - 5 2026-06-19
DAL4 Delta Air Lines 5 2026-06-08
DAL220 - 5 2026-07-21

Recent flights last 50

DateFlightRouteTakeoffLandingDuration
2026-07-26 DAL297 SPN → NRT Jul 26, 09:05 UTCJul 26, 20:25 UTC11h 20m
2026-07-25 DAL296 HND → ATL Jul 25, 19:54 UTCJul 26, 05:46 UTC9h 52m
2026-07-25 DAL296 HND → ATL Jul 25, 19:55 UTCJul 25, 22:55 UTC3h 0m
2026-07-24 DAL67 FCO → ATL Jul 24, 12:35 UTCJul 24, 13:30 UTC55m
2026-07-24 DAL67 FCO → ATL Jul 24, 12:30 UTCJul 24, 22:24 UTC9h 54m
2026-07-23 DAL66 ATL → FCO Jul 23, 23:25 UTCJul 24, 08:25 UTC9h 0m
2026-07-23 DAL223 ATH → ATL Jul 23, 07:35 UTCJul 23, 18:55 UTC11h 20m
2026-07-23 DAL223 ATH → ATL Jul 23, 07:34 UTCJul 23, 18:50 UTC11h 16m
2026-07-22 DAL240 BOS → ATH Jul 22, 20:55 UTCJul 23, 05:25 UTC8h 30m
2026-07-22 DAL240 - Jul 22, 20:55 UTCJul 22, 21:30 UTC35m
2026-07-22 DAL225 CDG → BOS Jul 22, 11:20 UTCJul 22, 18:20 UTC7h 0m
2026-07-21 DAL220 - Jul 21, 23:00 UTCJul 22, 01:20 UTC2h 20m
2026-07-21 DAL220 SLC → CDG Jul 21, 22:47 UTCJul 22, 07:51 UTC9h 4m
2026-07-21 DAL221 CDG → SLC Jul 21, 10:00 UTCJul 21, 20:10 UTC10h 10m
2026-07-21 DAL221 CDG → SLC Jul 21, 09:57 UTCJul 21, 19:57 UTC10h 0m
2026-07-21 DAL224 SEA → AMS Jul 21, 00:40 UTCJul 21, 07:00 UTC6h 20m
2026-07-20 DAL241 ATH → BOS Jul 20, 12:10 UTCJul 20, 22:05 UTC9h 55m
2026-07-19 DAL222 ATL → ATH Jul 19, 23:30 UTCJul 20, 07:30 UTC8h 0m
2026-07-19 DAL222 ATL → ATH Jul 19, 23:30 UTCJul 20, 09:51 UTC10h 21m
2026-07-19 DAL297 ATH → ATL Jul 19, 08:45 UTCJul 19, 20:35 UTC11h 50m
2026-07-18 DAL296 - Jul 18, 19:45 UTCJul 18, 21:45 UTC2h 0m
2026-07-18 DAL296 ATL → ATH Jul 18, 19:42 UTCJul 19, 06:18 UTC10h 36m
2026-07-17 DAL110 - Jul 17, 23:20 UTCJul 18, 09:05 UTC9h 46m
2026-07-17 DAL101 - Jul 17, 03:39 UTCJul 17, 11:30 UTC7h 50m
2026-07-17 DAL101 ATL → EZE Jul 17, 03:36 UTCJul 17, 13:04 UTC9h 28m
2026-07-16 DAL297 ATH → ATL Jul 16, 10:00 UTCJul 16, 22:15 UTC12h 15m
2026-07-15 DAL296 ATL → ATH Jul 15, 20:29 UTCJul 16, 06:47 UTC10h 18m
2026-07-15 DAL296 ATL → ATH Jul 15, 20:30 UTCJul 16, 06:55 UTC10h 25m
2026-07-14 DAL67 - Jul 14, 12:05 UTCJul 14, 22:10 UTC10h 5m
2026-07-13 DAL66 - Jul 13, 23:55 UTCJul 14, 09:05 UTC9h 10m
2026-07-13 DAL223 - Jul 13, 17:30 UTCJul 13, 19:05 UTC1h 35m
2026-07-13 DAL223 - Jul 13, 07:05 UTCJul 13, 17:25 UTC10h 20m
2026-07-13 DAL223 ATH → ATL Jul 13, 07:01 UTCJul 13, 19:08 UTC12h 7m
2026-07-12 DAL240 BOS → ATH Jul 12, 19:46 UTCJul 13, 04:25 UTC8h 39m
2026-07-12 DAL240 - Jul 12, 19:50 UTCJul 12, 21:10 UTC1h 20m
2026-07-12 DAL59 LHR → BOS Jul 12, 08:50 UTCJul 12, 15:25 UTC6h 35m
2026-07-11 DAL58 - Jul 11, 23:45 UTCJul 12, 05:45 UTC6h 0m
2026-07-11 DAL257 AMS → BOS Jul 11, 14:04 UTCJul 11, 21:14 UTC7h 10m
2026-07-11 DAL257 - Jul 11, 14:05 UTCJul 11, 15:50 UTC1h 45m
2026-07-11 DAL136 - Jul 11, 04:25 UTCJul 11, 11:30 UTC7h 5m
2026-07-10 DAL137 - Jul 10, 13:00 UTCJul 10, 21:10 UTC8h 10m
2026-07-09 DAL56 SLC → AMS Jul 9, 22:55 UTCJul 10, 08:07 UTC9h 12m
2026-07-09 DAL56 SLC → AMS Jul 9, 22:55 UTCJul 10, 08:20 UTC9h 25m
2026-07-09 DAL221 - Jul 9, 09:20 UTCJul 9, 19:35 UTC10h 15m
2026-07-08 DAL224 - Jul 8, 23:55 UTCJul 9, 01:10 UTC1h 15m
2026-07-08 DAL224 BOS → CDG Jul 8, 23:53 UTCJul 9, 06:19 UTC6h 26m
2026-07-08 DAL241 ATH → BOS Jul 8, 10:52 UTCJul 8, 20:31 UTC9h 39m
2026-07-08 DAL241 ATH → BOS Jul 8, 10:55 UTCJul 8, 20:30 UTC9h 35m
2026-07-07 DAL222 - Jul 7, 21:25 UTCJul 8, 07:30 UTC10h 5m
2026-07-07 DAL222 ATL → ATH Jul 7, 21:23 UTCJul 8, 07:48 UTC10h 25m

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 N431DX page for operator, model, and routing details .

Mode-S A52736 frequently asked

What is Mode-S code A52736?
A52736 is an ICAO 24-bit transponder address. Allocated to United States. Assigned to N431DX.
Where is Mode-S A52736 registered?
Mode-S code A52736 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 A52736 broadcasting right now?
No active broadcast right now. Last signal was Jul 26, 21:30 UTC.
Hex, octal, and decimal Mode-S codes: what's the difference?
The same 24-bit identifier expressed in different bases: hex A52736, octal 51223466, decimal 10,823,478.
What flights does A52736 operate?
Mode-S A52736 has broadcast 20 distinct callsigns, including DAL222, DAL240, DAL67, DAL241, DAL110.