Apparatus

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sensors Mode-S transponder

A65BBC

ICAO 24-bit transponder address · allocated to United States

Currently assigned to N509DT · AIRBUS A-321neo · operated by DELTA AIR LINES INC

Hex
A65BBC
Octal
51455674
Decimal
10,902,460
Country
US
Tail
N509DT
Type
A21N
Broadcasting now · callsign DAL658 · 4,000 ft
Flights observed
207
Distinct callsigns
20
Country
US
Last broadcast
5h ago

Current position

A65BBC is currently broadcasting. Map zoomed to live position.

Country allocation

The ICAO 24-bit address A65BBC 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
DAL1966 Delta Air Lines 9 2026-05-09
DAL1780 Delta Air Lines 8 2026-05-23
DAL474 Delta Air Lines 6 2026-05-15
DAL340 Delta Air Lines 6 2026-05-12
DAL332 Delta Air Lines 6 2026-05-15
DAL328 Delta Air Lines 6 2026-05-22
DAL356 Delta Air Lines 5 2026-04-25
DAL604 Delta Air Lines 4 2026-04-15
DAL594 Delta Air Lines 4 2026-04-14
DAL485 Delta Air Lines 4 2026-05-12
DAL359 Delta Air Lines 4 2026-05-13
DAL351 Delta Air Lines 4 2026-05-12
DAL2032 Delta Air Lines 4 2026-05-14
DAL1961 Delta Air Lines 4 2026-05-07
DAL1719 Delta Air Lines 4 2026-05-27
DAL652 Delta Air Lines 3 2026-04-15
DAL462 Delta Air Lines 3 2026-05-14
DAL443 Delta Air Lines 3 2026-04-27
DAL375 Delta Air Lines 3 2026-05-22
DAL1829 Delta Air Lines 3 2026-05-04

Recent flights last 50

DateFlightRouteTakeoffLandingDuration
2026-05-30 DAL465 LAX → HNL May 30, 02:00 UTCMay 30, 02:25 UTC25m
2026-05-29 DAL465 LAX → HNL May 29, 21:05 UTCMay 29, 21:35 UTC30m
2026-05-29 DAL829 JFK → PHX May 29, 17:50 UTCMay 29, 19:15 UTC1h 25m
2026-05-29 DAL830 ATL → SLC May 29, 12:25 UTCMay 29, 15:45 UTC3h 20m
2026-05-29 DAL830 ATL → SLC May 29, 12:23 UTCMay 29, 15:47 UTC3h 24m
2026-05-28 DAL2286 JFK → ATL May 28, 10:45 UTCMay 28, 12:40 UTC1h 55m
2026-05-27 DAL722 BOS → DTW May 27, 23:40 UTCMay 28, 04:25 UTC4h 45m
2026-05-27 DAL1719 MCO → BOS May 27, 16:10 UTCMay 27, 21:35 UTC5h 25m
2026-05-26 DAL722 BOS → DTW May 26, 23:28 UTCMay 27, 04:16 UTC4h 48m
2026-05-26 DAL347 HNL → SLC May 26, 16:30 UTCMay 26, 21:29 UTC5h 0m
2026-05-26 DAL448 OGG → LAX May 26, 06:39 UTCMay 26, 11:54 UTC5h 15m
2026-05-25 DAL506 LGA → ATL May 25, 22:30 UTCMay 26, 04:10 UTC5h 40m
2026-05-25 DAL506 LGA → ATL May 25, 15:05 UTCMay 25, 20:34 UTC5h 29m
2026-05-25 DAL394 SJC → ATL May 25, 11:50 UTCMay 25, 12:45 UTC55m
2026-05-24 DAL347 HNL → SLC May 24, 13:55 UTCMay 24, 19:25 UTC5h 30m
2026-05-23 DAL1513 BOS → MCO May 23, 23:45 UTCMay 24, 02:15 UTC2h 30m
2026-05-23 DAL1780 BOS → SJU May 23, 18:15 UTCMay 23, 21:55 UTC3h 40m
2026-05-23 DAL1780 BOS → SJU May 23, 18:10 UTCMay 23, 21:56 UTC3h 46m
2026-05-23 DAL1780 BOS → SJU May 23, 16:35 UTCMay 23, 16:50 UTC15m
2026-05-23 DAL1780 BOS → SJU May 23, 13:30 UTCMay 23, 15:10 UTC1h 40m
2026-05-23 DAL473 BOS → LAX May 23, 06:55 UTCMay 23, 11:45 UTC4h 50m
2026-05-22 DAL328 OGG → SEA May 22, 23:20 UTCMay 23, 05:10 UTC5h 49m
2026-05-22 DAL328 OGG → SEA May 22, 15:45 UTCMay 22, 21:00 UTC5h 15m
2026-05-22 DAL375 ATL → BOS May 22, 12:45 UTCMay 22, 13:40 UTC55m
2026-05-22 DAL375 ATL → BOS May 22, 08:12 UTCMay 22, 13:36 UTC5h 24m
2026-05-21 DAL428 SJC → ATL May 21, 22:00 UTCMay 21, 23:00 UTC1h 0m
2026-05-21 DAL428 SJC → ATL May 21, 21:58 UTCMay 22, 03:26 UTC5h 28m
2026-05-21 DAL2119 MSY → LGA May 21, 16:50 UTCMay 21, 20:10 UTC3h 20m
2026-05-21 DAL1138 BOS → RDU May 21, 12:15 UTCMay 21, 15:10 UTC2h 55m
2026-05-20 DAL821 BOS → FLL May 20, 22:45 UTCMay 21, 01:30 UTC2h 45m
2026-05-20 DAL821 BOS → FLL May 20, 22:45 UTCMay 21, 01:20 UTC2h 35m
2026-05-20 DAL1912 DTW → CUN May 20, 17:15 UTCMay 20, 21:05 UTC3h 50m
2026-05-20 DAL1909 MSP → LGA May 20, 15:15 UTCMay 20, 15:35 UTC20m
2026-05-20 DAL1909 MSP → LGA May 20, 12:10 UTCMay 20, 14:40 UTC2h 30m
2026-05-20 DAL905 SLC → ATL May 20, 00:10 UTCMay 20, 03:20 UTC3h 10m
2026-05-19 DAL1120 JFK → RSW May 19, 20:45 UTCMay 19, 22:15 UTC1h 30m
2026-05-19 DAL889 PDX → JFK May 19, 15:50 UTCMay 19, 19:05 UTC3h 15m
2026-05-19 DAL889 PDX → JFK May 19, 15:47 UTCMay 19, 18:57 UTC3h 10m
2026-05-19 DAL953 ATL → DFW May 19, 07:25 UTCMay 19, 10:10 UTC2h 45m
2026-05-19 DAL324 LAX → JFK May 19, 00:20 UTCMay 19, 05:55 UTC5h 35m
2026-05-18 DAL1780 BOS → SJU May 18, 20:05 UTCMay 18, 21:55 UTC1h 50m
2026-05-18 DAL1780 BOS → SJU May 18, 18:20 UTCMay 18, 18:35 UTC14m
2026-05-18 DAL1780 BOS → SJU May 18, 18:15 UTCMay 18, 21:54 UTC3h 39m
2026-05-18 DAL1780 BOS → SJU May 18, 13:05 UTCMay 18, 16:40 UTC3h 35m
2026-05-18 DAL473 BOS → LAX May 18, 06:25 UTCMay 18, 11:25 UTC5h 0m
2026-05-17 DAL328 OGG → SEA May 17, 23:15 UTCMay 18, 04:51 UTC5h 36m
2026-05-17 DAL328 OGG → SEA May 17, 15:55 UTCMay 17, 20:55 UTC5h 0m
2026-05-16 DAL375 ATL → BOS May 16, 22:10 UTCMay 17, 13:20 UTC15h 10m
2026-05-16 DAL2119 MSY → LGA May 16, 16:45 UTCMay 16, 20:15 UTC3h 30m
2026-05-16 DAL1138 BOS → RDU May 16, 12:25 UTCMay 16, 15:01 UTC2h 35m

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 N509DT page for operator, model, and routing details .

Mode-S A65BBC frequently asked

What is Mode-S code A65BBC?
A65BBC is an ICAO 24-bit transponder address. Allocated to United States. Assigned to N509DT.
Where is Mode-S A65BBC registered?
Mode-S code A65BBC 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 A65BBC broadcasting right now?
Yes. Mode-S A65BBC is currently airborne.
Hex, octal, and decimal Mode-S codes: what's the difference?
The same 24-bit identifier expressed in different bases: hex A65BBC, octal 51455674, decimal 10,902,460.
What flights does A65BBC operate?
Mode-S A65BBC has broadcast 20 distinct callsigns, including DAL1966, DAL1780, DAL474, DAL340, DAL332.