Apparatus

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sensors Mode-S transponder

A52EA4

ICAO 24-bit transponder address · allocated to United States

Currently assigned to N433DX · AIRBUS A-330-900 · operated by DELTA AIR LINES INC

Hex
A52EA4
Octal
51227244
Decimal
10,825,380
Country
US
Tail
N433DX
Type
A339
Broadcasting now · callsign DAL145 · 40,000 ft
Flights observed
329
Distinct callsigns
20
Country
US
Last broadcast
Jul 26, 23:00 UTC

Current position

A52EA4 is currently broadcasting. Map zoomed to live position.

Country allocation

The ICAO 24-bit address A52EA4 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
DAL66 Delta Air Lines 13 2026-07-17
DAL273 - 13 2026-07-10
DAL165 Delta Air Lines 11 2026-07-25
DAL272 - 9 2026-07-10
DAL157 - 9 2026-07-09
DAL144 Delta Air Lines 9 2026-07-25
DAL4 - 8 2026-07-03
DAL223 - 8 2026-07-17
DAL203 - 8 2026-07-11
DAL164 - 8 2026-07-14
DAL143 Delta Air Lines 8 2026-07-23
DAL101 - 8 2026-06-28
DAL48 - 7 2026-06-24
DAL3 - 7 2026-07-13
DAL237 Delta Air Lines 7 2026-06-12
DAL202 - 7 2026-07-10
DAL16 - 7 2026-07-15
DAL113 Delta Air Lines 7 2026-04-26
DAL10 - 7 2026-07-03
DAL67 - 6 2026-07-18

Recent flights last 50

DateFlightRouteTakeoffLandingDuration
2026-07-26 DAL299 JFK → SFO Jul 26, 13:10 UTCJul 26, 23:00 UTC9h 50m
2026-07-26 DAL298 JFK → LOS Jul 26, 01:48 UTCJul 26, 10:56 UTC9h 8m
2026-07-26 DAL298 JFK → LOS Jul 26, 01:50 UTCJul 26, 04:50 UTC3h 0m
2026-07-25 DAL165 AMS → MSP Jul 25, 13:05 UTCJul 25, 21:40 UTC8h 35m
2026-07-25 DAL144 SEA → AMS Jul 25, 00:55 UTCJul 25, 09:35 UTC8h 40m
2026-07-24 DAL249 TLV → ATL Jul 24, 11:40 UTCJul 24, 22:25 UTC10h 45m
2026-07-23 DAL248 ATL → TLV Jul 23, 22:45 UTCJul 23, 23:00 UTC15m
2026-07-23 DAL248 ATL → TLV Jul 23, 22:44 UTCJul 24, 09:10 UTC10h 26m
2026-07-23 DAL143 FRA → DTW Jul 23, 08:50 UTCJul 23, 18:15 UTC9h 25m
2026-07-22 DAL256 BOS → AMS Jul 22, 21:20 UTCJul 23, 03:40 UTC6h 20m
2026-07-21 DAL241 ATH → BOS Jul 21, 10:50 UTCJul 21, 11:00 UTC10m
2026-07-21 DAL241 ATH → BOS Jul 21, 10:49 UTCJul 21, 20:34 UTC9h 45m
2026-07-21 DAL241 ATH → BOS Jul 21, 10:49 UTCJul 21, 20:40 UTC9h 51m
2026-07-20 DAL222 ATL → ATH Jul 20, 22:15 UTCJul 21, 08:32 UTC10h 17m
2026-07-20 DAL222 ATL → ATH Jul 20, 22:15 UTCJul 21, 01:20 UTC3h 4m
2026-07-20 DAL215 FCO → ATL Jul 20, 09:11 UTCJul 20, 19:14 UTC10h 3m
2026-07-20 DAL215 - Jul 20, 09:15 UTCJul 20, 19:20 UTC10h 5m
2026-07-19 DAL214 ATL → FCO Jul 19, 20:50 UTCJul 20, 06:05 UTC9h 15m
2026-07-19 DAL214 ATL → FCO Jul 19, 20:49 UTCJul 20, 06:01 UTC9h 12m
2026-07-18 DAL67 - Jul 18, 12:40 UTCJul 18, 22:40 UTC10h 0m
2026-07-17 DAL66 ATL → FCO Jul 17, 23:39 UTCJul 18, 07:00 UTC7h 21m
2026-07-17 DAL66 ATL → FCO Jul 17, 23:38 UTCJul 18, 08:56 UTC9h 18m
2026-07-17 DAL223 - Jul 17, 18:50 UTCJul 17, 18:55 UTC5m
2026-07-17 DAL223 - Jul 17, 07:05 UTCJul 17, 11:20 UTC4h 15m
2026-07-17 DAL223 ATH → ATL Jul 17, 07:01 UTCJul 17, 18:33 UTC11h 32m
2026-07-17 DAL223 ATH → ATL Jul 17, 07:01 UTCJul 17, 18:55 UTC11h 54m
2026-07-16 DAL240 BOS → ATH Jul 16, 20:09 UTCJul 17, 04:39 UTC8h 30m
2026-07-16 DAL59 - Jul 16, 09:00 UTCJul 16, 15:40 UTC6h 40m
2026-07-15 DAL16 - Jul 15, 23:00 UTCJul 16, 06:15 UTC7h 15m
2026-07-15 DAL16 DTW → LHR Jul 15, 22:58 UTCJul 16, 06:05 UTC7h 7m
2026-07-15 DAL17 - Jul 15, 12:25 UTCJul 15, 19:55 UTC7h 30m
2026-07-15 DAL58 BOS → LHR Jul 15, 03:35 UTCJul 15, 10:05 UTC6h 30m
2026-07-14 DAL257 - Jul 14, 13:40 UTCJul 14, 20:25 UTC6h 45m
2026-07-14 DAL164 - Jul 14, 03:00 UTCJul 14, 03:55 UTC55m
2026-07-14 DAL164 MSP → AMS Jul 14, 02:59 UTCJul 14, 10:48 UTC7h 49m
2026-07-13 DAL9 - Jul 13, 12:05 UTCJul 13, 13:25 UTC1h 20m
2026-07-13 DAL9 LHR → MSP Jul 13, 12:02 UTCJul 13, 20:01 UTC7h 59m
2026-07-13 DAL3 JFK → LHR Jul 13, 02:35 UTCJul 13, 09:03 UTC6h 28m
2026-07-13 DAL3 JFK → LHR Jul 13, 02:35 UTCJul 13, 09:05 UTC6h 30m
2026-07-12 DAL213 ATH → JFK Jul 12, 13:33 UTCJul 12, 23:39 UTC10h 6m
2026-07-12 DAL213 - Jul 12, 13:35 UTCJul 12, 17:01 UTC3h 25m
2026-07-12 DAL212 JFK → ATH Jul 12, 02:14 UTCJul 12, 11:06 UTC8h 52m
2026-07-12 DAL212 - Jul 12, 02:15 UTCJul 12, 03:01 UTC45m
2026-07-11 DAL203 ATH → JFK Jul 11, 07:30 UTCJul 11, 17:40 UTC10h 10m
2026-07-10 DAL202 - Jul 10, 19:35 UTCJul 10, 21:00 UTC1h 25m
2026-07-10 DAL202 JFK → ATH Jul 10, 19:34 UTCJul 11, 04:24 UTC8h 50m
2026-07-10 DAL273 CTO → JFK Jul 10, 16:20 UTCJul 10, 16:45 UTC25m
2026-07-10 DAL273 - Jul 10, 09:25 UTCJul 10, 16:15 UTC6h 50m
2026-07-10 DAL272 JFK → LIS Jul 10, 00:35 UTCJul 10, 06:45 UTC6h 10m
2026-07-09 DAL157 ACC → JFK Jul 9, 09:35 UTCJul 9, 19:23 UTC9h 48m

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 N433DX page for operator, model, and routing details .

Mode-S A52EA4 frequently asked

What is Mode-S code A52EA4?
A52EA4 is an ICAO 24-bit transponder address. Allocated to United States. Assigned to N433DX.
Where is Mode-S A52EA4 registered?
Mode-S code A52EA4 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 A52EA4 broadcasting right now?
Yes. Mode-S A52EA4 is currently airborne.
Hex, octal, and decimal Mode-S codes: what's the difference?
The same 24-bit identifier expressed in different bases: hex A52EA4, octal 51227244, decimal 10,825,380.
What flights does A52EA4 operate?
Mode-S A52EA4 has broadcast 20 distinct callsigns, including DAL66, DAL273, DAL165, DAL272, DAL157.