Apparatus

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sensors Mode-S transponder

A53612

ICAO 24-bit transponder address · allocated to United States

Currently assigned to N435DX · AIRBUS A-330-900 · operated by BANK OF UTAH TRUSTEE

Hex
A53612
Octal
51233022
Decimal
10,827,282
Country
US
Tail
N435DX
Type
A339
No current signal · last broadcast Jul 26, 22:15 UTC
Flights observed
318
Distinct callsigns
20
Country
US
Last broadcast
Jul 26, 22:15 UTC

Last known position

Most recent position reported by Mode-S A53612.

Country allocation

The ICAO 24-bit address A53612 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
DAL4 - 10 2026-07-04
DAL220 Delta Air Lines 8 2026-07-26
DAL21 Delta Air Lines 8 2026-07-21
DAL20 - 8 2026-07-21
DAL165 Delta Air Lines 8 2026-07-01
DAL143 - 8 2026-06-23
DAL133 - 8 2026-06-21
DAL10 - 8 2026-07-02
DAL81 - 7 2026-07-17
DAL80 - 7 2026-07-17
DAL742 - 7 2026-07-08
DAL57 Delta Air Lines 7 2026-07-26
DAL3 - 7 2026-07-09
DAL225 - 7 2026-06-25
DAL17 Delta Air Lines 7 2026-07-24
DAL16 - 7 2026-06-21
DAL144 - 7 2026-07-16
DAL132 - 7 2026-06-22
DAL9 - 6 2026-07-09
DAL162 Delta Air Lines 6 2026-06-06

Recent flights last 50

DateFlightRouteTakeoffLandingDuration
2026-07-26 DAL220 SLC → CDG Jul 26, 21:55 UTCJul 26, 22:15 UTC20m
2026-07-26 DAL57 AMS → SLC Jul 26, 09:11 UTCJul 26, 18:56 UTC9h 45m
2026-07-26 DAL57 AMS → SLC Jul 26, 09:15 UTCJul 26, 19:00 UTC9h 45m
2026-07-25 DAL134 DTW → AMS Jul 25, 22:45 UTCJul 26, 01:00 UTC2h 15m
2026-07-25 DAL134 DTW → AMS Jul 25, 22:40 UTCJul 26, 06:01 UTC7h 21m
2026-07-25 DAL135 AMS → DTW Jul 25, 09:35 UTCJul 25, 17:35 UTC8h 0m
2026-07-24 DAL134 DTW → AMS Jul 24, 22:40 UTCJul 25, 05:50 UTC7h 10m
2026-07-24 DAL134 DTW → AMS Jul 24, 22:38 UTCJul 25, 05:56 UTC7h 18m
2026-07-24 DAL17 LHR → DTW Jul 24, 10:10 UTCJul 24, 17:50 UTC7h 40m
2026-07-24 DAL58 BOS → LHR Jul 24, 00:39 UTCJul 24, 06:32 UTC5h 53m
2026-07-24 DAL58 BOS → LHR Jul 24, 00:40 UTCJul 24, 06:30 UTC5h 50m
2026-07-23 DAL243 TLV → BOS Jul 23, 12:24 UTCJul 23, 19:17 UTC6h 53m
2026-07-23 DAL243 TLV → BOS Jul 23, 12:25 UTCJul 23, 12:30 UTC5m
2026-07-23 DAL142 SEA → AMS Jul 23, 00:25 UTCJul 23, 09:40 UTC9h 15m
2026-07-23 DAL142 SEA → AMS Jul 23, 00:23 UTCJul 23, 09:33 UTC9h 10m
2026-07-21 DAL21 LHR → SEA Jul 21, 17:05 UTCJul 21, 23:40 UTC6h 35m
2026-07-21 DAL21 LHR → SEA Jul 21, 17:03 UTCJul 22, 02:31 UTC9h 28m
2026-07-21 DAL20 - Jul 21, 05:25 UTCJul 21, 06:30 UTC1h 5m
2026-07-21 DAL20 SEA → LHR Jul 21, 05:24 UTCJul 21, 14:12 UTC8h 48m
2026-07-20 DAL43 - Jul 20, 14:35 UTCJul 20, 16:30 UTC1h 55m
2026-07-20 DAL43 LAX → SYD Jul 20, 14:30 UTCJul 21, 01:57 UTC11h 27m
2026-07-20 DAL42 SYD → LAX Jul 20, 01:25 UTCJul 20, 12:05 UTC10h 40m
2026-07-18 DAL21 LHR → SEA Jul 18, 17:05 UTCJul 19, 02:35 UTC9h 30m
2026-07-18 DAL20 - Jul 18, 13:35 UTCJul 18, 13:50 UTC15m
2026-07-18 DAL20 SEA → LHR Jul 18, 05:11 UTCJul 18, 13:19 UTC8h 8m
2026-07-18 DAL20 - Jul 18, 05:15 UTCJul 18, 12:00 UTC6h 45m
2026-07-17 DAL81 CDG → SEA Jul 17, 14:24 UTCJul 18, 00:11 UTC9h 47m
2026-07-17 DAL81 CDG → SEA Jul 17, 14:24 UTCJul 18, 00:09 UTC9h 45m
2026-07-17 DAL80 SEA → CDG Jul 17, 02:17 UTCJul 17, 11:34 UTC9h 17m
2026-07-17 DAL80 - Jul 17, 02:20 UTCJul 17, 11:39 UTC9h 20m
2026-07-16 DAL145 AMS → SEA Jul 16, 13:34 UTCJul 16, 23:15 UTC9h 40m
2026-07-16 DAL144 SEA → AMS Jul 16, 01:00 UTCJul 16, 10:10 UTC9h 10m
2026-07-15 DAL249 BCN → SEA Jul 15, 11:57 UTCJul 15, 22:36 UTC10h 39m
2026-07-15 DAL249 BCN → SEA Jul 15, 12:00 UTCJul 15, 22:35 UTC10h 35m
2026-07-14 DAL248 - Jul 14, 22:45 UTCJul 15, 06:30 UTC7h 45m
2026-07-14 DAL248 SEA → BCN Jul 14, 22:43 UTCJul 15, 08:46 UTC10h 3m
2026-07-13 DAL21 LHR → SEA Jul 13, 17:35 UTCJul 14, 03:04 UTC9h 29m
2026-07-13 DAL21 LHR → SEA Jul 13, 17:35 UTCJul 14, 03:11 UTC9h 36m
2026-07-13 DAL20 SEA → LHR Jul 13, 05:20 UTCJul 13, 14:05 UTC8h 45m
2026-07-12 DAL81 - Jul 12, 14:35 UTCJul 13, 00:40 UTC10h 5m
2026-07-12 DAL80 - Jul 12, 01:55 UTCJul 12, 02:30 UTC35m
2026-07-12 DAL80 SEA → CDG Jul 12, 01:56 UTCJul 12, 11:11 UTC9h 15m
2026-07-11 DAL145 AMS → SEA Jul 11, 13:27 UTCJul 11, 23:26 UTC9h 59m
2026-07-11 DAL145 - Jul 11, 13:30 UTCJul 11, 23:30 UTC10h 0m
2026-07-11 DAL164 MSP → AMS Jul 11, 03:10 UTCJul 11, 11:00 UTC7h 50m
2026-07-10 DAL299 - Jul 10, 14:05 UTCJul 10, 23:45 UTC9h 41m
2026-07-10 DAL298 MSP → FCO Jul 10, 01:47 UTCJul 10, 10:49 UTC9h 2m
2026-07-10 DAL298 - Jul 10, 01:50 UTCJul 10, 10:30 UTC8h 40m
2026-07-09 DAL9 - Jul 9, 12:00 UTCJul 9, 13:15 UTC1h 15m
2026-07-09 DAL9 LHR → MSP Jul 9, 11:58 UTCJul 9, 19:55 UTC7h 57m

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 N435DX page for operator, model, and routing details .

Mode-S A53612 frequently asked

What is Mode-S code A53612?
A53612 is an ICAO 24-bit transponder address. Allocated to United States. Assigned to N435DX.
Where is Mode-S A53612 registered?
Mode-S code A53612 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 A53612 broadcasting right now?
No active broadcast right now. Last signal was Jul 26, 22:15 UTC.
Hex, octal, and decimal Mode-S codes: what's the difference?
The same 24-bit identifier expressed in different bases: hex A53612, octal 51233022, decimal 10,827,282.
What flights does A53612 operate?
Mode-S A53612 has broadcast 20 distinct callsigns, including DAL4, DAL220, DAL21, DAL20, DAL165.