Apparatus

Try JFK, AAL1290, BAW, or N225AN.

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
No current signal · last broadcast Jul 26, 17:40 UTC
Flights observed
428
Distinct callsigns
20
Country
US
Last broadcast
Jul 26, 17:40 UTC

Last known position

Most recent position reported by Mode-S A65BBC.

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
DAL1961 Delta Air Lines 16 2026-07-23
DAL1780 Delta Air Lines 15 2026-06-13
DAL328 - 11 2026-06-22
DAL1975 Delta Air Lines 10 2026-07-22
DAL1966 Delta Air Lines 9 2026-05-09
DAL652 Delta Air Lines 7 2026-07-24
DAL359 - 7 2026-07-11
DAL474 Delta Air Lines 6 2026-05-15
DAL415 Delta Air Lines 6 2026-07-20
DAL351 - 6 2026-07-10
DAL340 Delta Air Lines 6 2026-05-12
DAL332 Delta Air Lines 6 2026-05-15
DAL2436 - 6 2026-07-14
DAL2032 Delta Air Lines 6 2026-06-10
DAL1993 - 6 2026-07-22
DAL443 - 5 2026-06-22
DAL440 Delta Air Lines 5 2026-06-22
DAL356 Delta Air Lines 5 2026-04-25
DAL875 Delta Air Lines 4 2026-07-18
DAL865 Delta Air Lines 4 2026-07-19

Recent flights last 50

DateFlightRouteTakeoffLandingDuration
2026-07-26 DAL2049 JFK → ATL Jul 26, 15:25 UTCJul 26, 17:30 UTC2h 5m
2026-07-25 DAL2056 IAH → LAX Jul 25, 23:35 UTCJul 26, 03:30 UTC3h 55m
2026-07-25 DAL1209 IAH → LGA Jul 25, 20:30 UTCJul 25, 21:55 UTC1h 25m
2026-07-25 DAL1209 IAH → LGA Jul 25, 17:25 UTCJul 25, 18:55 UTC1h 30m
2026-07-25 DAL1318 MSP → EWR Jul 25, 14:35 UTCJul 25, 15:55 UTC1h 20m
2026-07-25 DAL435 EWR → ATL Jul 25, 06:50 UTCJul 25, 11:55 UTC5h 5m
2026-07-25 DAL435 EWR → ATL Jul 25, 06:36 UTCJul 25, 11:51 UTC5h 15m
2026-07-24 DAL345 BOS → SEA Jul 24, 23:10 UTCJul 25, 04:54 UTC5h 44m
2026-07-24 DAL345 BOS → SEA Jul 24, 23:10 UTCJul 25, 04:35 UTC5h 25m
2026-07-24 DAL2921 SLC → SEA Jul 24, 19:50 UTCJul 24, 21:30 UTC1h 40m
2026-07-24 DAL387 ATL → SLC Jul 24, 14:45 UTCJul 24, 18:15 UTC3h 30m
2026-07-24 DAL652 DEN → BOS Jul 24, 08:55 UTCJul 24, 11:00 UTC2h 5m
2026-07-24 DAL652 DEN → BOS Jul 24, 08:51 UTCJul 24, 13:04 UTC4h 13m
2026-07-23 DAL740 PWM → ATL Jul 23, 21:55 UTCJul 24, 03:40 UTC5h 45m
2026-07-23 DAL1406 JFK → MCO Jul 23, 16:30 UTCJul 23, 19:55 UTC3h 25m
2026-07-23 DAL1406 JFK → MCO Jul 23, 16:25 UTCJul 23, 19:59 UTC3h 34m
2026-07-23 DAL1406 JFK → MCO Jul 23, 11:35 UTCJul 23, 14:55 UTC3h 20m
2026-07-23 DAL1961 JFK → SJU Jul 23, 00:25 UTCJul 23, 01:35 UTC1h 10m
2026-07-22 DAL1961 JFK → SJU Jul 22, 22:05 UTCJul 22, 22:15 UTC10m
2026-07-22 DAL1961 JFK → SJU Jul 22, 22:01 UTCJul 23, 01:24 UTC3h 23m
2026-07-22 DAL1961 JFK → SJU Jul 22, 20:10 UTCJul 22, 20:35 UTC25m
2026-07-22 DAL1961 JFK → SJU Jul 22, 17:10 UTCJul 22, 17:50 UTC40m
2026-07-22 DAL1993 - Jul 22, 11:50 UTCJul 22, 13:50 UTC2h 0m
2026-07-22 DAL1975 JFK → STI Jul 22, 03:49 UTCJul 22, 08:19 UTC4h 30m
2026-07-22 DAL1975 JFK → STI Jul 22, 03:50 UTCJul 22, 05:25 UTC1h 35m
2026-07-21 DAL1993 - Jul 21, 13:30 UTCJul 21, 14:25 UTC55m
2026-07-21 DAL1993 STI → JFK Jul 21, 11:09 UTCJul 21, 14:21 UTC3h 12m
2026-07-21 DAL1975 - Jul 21, 02:25 UTCJul 21, 03:05 UTC40m
2026-07-21 DAL1975 JFK → STI Jul 21, 02:21 UTCJul 21, 05:32 UTC3h 11m
2026-07-20 DAL415 ATL → BOS Jul 20, 18:59 UTCJul 20, 23:14 UTC4h 15m
2026-07-20 DAL415 ATL → BOS Jul 20, 19:00 UTCJul 20, 23:15 UTC4h 15m
2026-07-19 DAL2889 BOS → SEA Jul 19, 20:05 UTCJul 20, 01:55 UTC5h 50m
2026-07-19 DAL2706 MSP → PHL Jul 19, 15:35 UTCJul 19, 18:10 UTC2h 35m
2026-07-19 DAL2706 MSP → PHL Jul 19, 11:20 UTCJul 19, 14:05 UTC2h 45m
2026-07-19 DAL865 BOS → LGA Jul 19, 03:25 UTCJul 19, 05:20 UTC1h 55m
2026-07-19 DAL865 BOS → LGA Jul 19, 03:23 UTCJul 19, 05:22 UTC1h 59m
2026-07-18 DAL875 LGA → ATL Jul 18, 22:00 UTCJul 19, 01:20 UTC3h 20m
2026-07-18 DAL1318 - Jul 18, 15:40 UTCJul 18, 17:00 UTC1h 20m
2026-07-18 DAL658 - Jul 18, 11:40 UTCJul 18, 12:40 UTC1h 0m
2026-07-18 DAL658 - Jul 18, 07:45 UTCJul 18, 08:00 UTC15m
2026-07-17 DAL465 LAX → HNL Jul 17, 21:10 UTCJul 18, 02:29 UTC5h 20m
2026-07-17 DAL465 LAX → HNL Jul 17, 21:09 UTCJul 18, 02:24 UTC5h 15m
2026-07-17 DAL829 - Jul 17, 18:10 UTCJul 17, 19:35 UTC1h 25m
2026-07-17 DAL1117 BOS → MSP Jul 17, 13:45 UTCJul 17, 15:10 UTC1h 25m
2026-07-17 DAL1117 BOS → MSP Jul 17, 13:40 UTCJul 17, 15:11 UTC1h 31m
2026-07-17 DAL1202 SLC → SAN Jul 17, 05:35 UTCJul 17, 07:00 UTC1h 25m
2026-07-17 DAL1210 - Jul 17, 02:54 UTCJul 17, 02:59 UTC5m
2026-07-17 DAL1210 SAN → SLC Jul 17, 02:55 UTCJul 17, 04:22 UTC1h 27m
2026-07-16 DAL1210 SLC → SAN Jul 16, 23:59 UTCJul 17, 01:35 UTC1h 35m
2026-07-16 DAL663 ATL → SLC Jul 16, 19:20 UTCJul 16, 22:49 UTC3h 30m

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?
No active broadcast right now. Last signal was Jul 26, 17:40 UTC.
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 DAL1961, DAL1780, DAL328, DAL1975, DAL1966.