Apparatus

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sensors Mode-S transponder

A6BBEF

ICAO 24-bit transponder address · allocated to United States

Currently assigned to N533DT · AIRBUS A-321neo · operated by DELTA AIR LINES INC

Hex
A6BBEF
Octal
51535757
Decimal
10,927,087
Country
US
Tail
N533DT
Type
A21N
No current signal · last broadcast Jul 26, 21:45 UTC
Flights observed
408
Distinct callsigns
20
Country
US
Last broadcast
Jul 26, 21:45 UTC

Last known position

Most recent position reported by Mode-S A6BBEF.

Country allocation

The ICAO 24-bit address A6BBEF 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
DAL1780 Delta Air Lines 11 2026-05-27
DAL422 - 9 2026-07-19
DAL506 - 8 2026-06-17
DAL443 Delta Air Lines 7 2026-06-05
DAL440 Delta Air Lines 7 2026-05-23
DAL2225 Delta Air Lines 7 2026-04-18
DAL1715 Delta Air Lines 7 2026-05-03
DAL473 Delta Air Lines 6 2026-05-27
DAL415 Delta Air Lines 6 2026-07-24
DAL344 - 6 2026-06-16
DAL311 - 6 2026-06-22
DAL2103 Delta Air Lines 6 2026-04-19
DAL865 Delta Air Lines 5 2026-07-26
DAL612 - 5 2026-06-27
DAL485 Delta Air Lines 5 2026-05-04
DAL428 - 5 2026-06-14
DAL394 - 5 2026-06-17
DAL359 Delta Air Lines 5 2026-05-20
DAL917 Delta Air Lines 4 2026-07-25
DAL905 - 4 2026-06-16

Recent flights last 50

DateFlightRouteTakeoffLandingDuration
2026-07-26 DAL2889 DTW → BOS Jul 26, 19:55 UTCJul 26, 21:45 UTC1h 50m
2026-07-26 DAL2706 MSP → PHL Jul 26, 15:35 UTCJul 26, 18:10 UTC2h 35m
2026-07-26 DAL2706 MSP → PHL Jul 26, 11:20 UTCJul 26, 14:00 UTC2h 40m
2026-07-26 DAL865 BOS → LGA Jul 26, 02:50 UTCJul 26, 04:55 UTC2h 5m
2026-07-25 DAL875 LGA → ATL Jul 25, 22:05 UTCJul 26, 01:20 UTC3h 15m
2026-07-25 DAL917 DFW → ATL Jul 25, 16:00 UTCJul 25, 20:35 UTC4h 35m
2026-07-25 DAL1993 STI → JFK Jul 25, 02:40 UTCJul 25, 13:55 UTC11h 15m
2026-07-24 DAL415 ATL → BOS Jul 24, 18:50 UTCJul 24, 23:20 UTC4h 30m
2026-07-24 DAL699 JFK → SEA Jul 24, 11:10 UTCJul 24, 16:45 UTC5h 35m
2026-07-23 DAL671 JFK → SLC Jul 23, 20:50 UTCJul 23, 23:45 UTC2h 55m
2026-07-23 DAL671 JFK → SLC Jul 23, 20:46 UTCJul 24, 00:35 UTC3h 49m
2026-07-23 DAL2031 MCO → BOS Jul 23, 14:55 UTCJul 23, 19:00 UTC4h 5m
2026-07-23 DAL2555 ATL → GPT Jul 23, 11:25 UTCJul 23, 13:25 UTC2h 0m
2026-07-22 DAL708 LAX → DTW Jul 22, 23:00 UTCJul 23, 02:50 UTC3h 50m
2026-07-22 DAL634 JFK → LAS Jul 22, 17:05 UTCJul 22, 21:20 UTC4h 15m
2026-07-22 DAL634 JFK → LAS Jul 22, 17:01 UTCJul 22, 21:11 UTC4h 10m
2026-07-22 DAL2845 MSP → BDL Jul 22, 13:20 UTCJul 22, 15:30 UTC2h 10m
2026-07-21 DAL867 MCO → LAX Jul 21, 17:50 UTCJul 21, 22:40 UTC4h 50m
2026-07-21 DAL538 LAX → JFK Jul 21, 11:50 UTCJul 21, 16:15 UTC4h 25m
2026-07-21 DAL910 LAX → TPA Jul 21, 05:55 UTCJul 21, 10:25 UTC4h 30m
2026-07-20 DAL382 SEA → TPA Jul 20, 23:24 UTCJul 21, 03:44 UTC4h 20m
2026-07-20 DAL382 SEA → TPA Jul 20, 23:25 UTCJul 21, 03:50 UTC4h 24m
2026-07-20 DAL482 JFK → ATL Jul 20, 16:25 UTCJul 20, 21:10 UTC4h 45m
2026-07-20 DAL482 JFK → ATL Jul 20, 16:20 UTCJul 20, 21:06 UTC4h 46m
2026-07-20 DAL476 ATL → SLC Jul 20, 08:40 UTCJul 20, 14:15 UTC5h 35m
2026-07-20 DAL418 LAX → OGG Jul 20, 01:02 UTCJul 20, 06:04 UTC5h 2m
2026-07-20 DAL418 - Jul 20, 01:05 UTCJul 20, 01:40 UTC35m
2026-07-19 DAL422 - Jul 19, 21:45 UTCJul 19, 22:40 UTC55m
2026-07-19 DAL422 - Jul 19, 17:25 UTCJul 19, 17:40 UTC15m
2026-07-18 DAL465 LAX → HNL Jul 18, 21:35 UTCJul 18, 22:05 UTC30m
2026-07-18 DAL465 LAX → HNL Jul 18, 21:34 UTCJul 19, 02:51 UTC5h 17m
2026-07-18 DAL829 SLC → LAX Jul 18, 18:20 UTCJul 18, 19:50 UTC1h 30m
2026-07-17 DAL917 JFK → SLC Jul 17, 15:40 UTCJul 17, 20:04 UTC4h 25m
2026-07-17 DAL1975 JFK → JFK Jul 17, 03:10 UTCJul 17, 13:15 UTC10h 5m
2026-07-16 DAL415 SEA → JFK Jul 16, 20:05 UTCJul 17, 00:40 UTC4h 35m
2026-07-16 DAL2092 PHL → SEA Jul 16, 11:15 UTCJul 16, 16:25 UTC5h 10m
2026-07-16 DAL2092 PHL → SEA Jul 16, 11:14 UTCJul 16, 16:24 UTC5h 10m
2026-07-16 DAL1114 SEA → PHL Jul 16, 05:00 UTCJul 16, 09:20 UTC4h 20m
2026-07-16 DAL1114 SEA → PHL Jul 16, 04:55 UTCJul 16, 09:19 UTC4h 24m
2026-07-15 DAL786 DCA → SEA Jul 15, 20:50 UTCJul 16, 01:50 UTC5h 0m
2026-07-15 DAL786 SEA → DCA Jul 15, 14:45 UTCJul 15, 19:15 UTC4h 30m
2026-07-15 DAL9846 - Jul 15, 01:00 UTCJul 15, 06:30 UTC5h 30m
2026-07-15 DAL9846 MIA → SEA Jul 15, 00:56 UTCJul 15, 06:21 UTC5h 25m
2026-07-14 DAL9966 ATL → MIA Jul 14, 21:40 UTCJul 14, 23:10 UTC1h 29m
2026-07-14 DAL9966 ATL → MIA Jul 14, 21:40 UTCJul 14, 23:10 UTC1h 30m
2026-07-04 DAL562 SEA → ATL Jul 4, 14:55 UTCJul 4, 19:40 UTC4h 45m
2026-07-03 DAL2995 SLC → SEA Jul 3, 17:50 UTCJul 3, 19:35 UTC1h 45m
2026-07-03 DAL1318 - Jul 3, 14:30 UTCJul 3, 15:55 UTC1h 25m
2026-07-02 DAL382 - Jul 2, 21:40 UTCJul 3, 02:15 UTC4h 35m
2026-07-02 DAL2032 SDF → ATL Jul 2, 15:50 UTCJul 2, 19:50 UTC4h 0m

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 N533DT page for operator, model, and routing details .

Mode-S A6BBEF frequently asked

What is Mode-S code A6BBEF?
A6BBEF is an ICAO 24-bit transponder address. Allocated to United States. Assigned to N533DT.
Where is Mode-S A6BBEF registered?
Mode-S code A6BBEF 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 A6BBEF broadcasting right now?
No active broadcast right now. Last signal was Jul 26, 21:45 UTC.
Hex, octal, and decimal Mode-S codes: what's the difference?
The same 24-bit identifier expressed in different bases: hex A6BBEF, octal 51535757, decimal 10,927,087.
What flights does A6BBEF operate?
Mode-S A6BBEF has broadcast 20 distinct callsigns, including DAL1780, DAL422, DAL506, DAL443, DAL440.