Apparatus

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sensors Mode-S transponder

A6AABA

ICAO 24-bit transponder address · allocated to United States

Currently assigned to N529DT · AIRBUS A-321neo · operated by DELTA AIR LINES INC

Hex
A6AABA
Octal
51525272
Decimal
10,922,682
Country
US
Tail
N529DT
Type
A21N
No current signal · last broadcast Jul 26, 22:30 UTC
Flights observed
415
Distinct callsigns
20
Country
US
Last broadcast
Jul 26, 22:30 UTC

Last known position

Most recent position reported by Mode-S A6AABA.

Country allocation

The ICAO 24-bit address A6AABA 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 - 13 2026-07-21
DAL977 Delta Air Lines 10 2026-05-07
DAL435 - 9 2026-07-12
DAL784 - 8 2026-07-20
DAL486 Delta Air Lines 8 2026-06-03
DAL1855 - 8 2026-06-30
DAL571 - 7 2026-07-06
DAL504 Delta Air Lines 7 2026-07-25
DAL1961 - 7 2026-07-03
DAL1647 Delta Air Lines 7 2026-07-25
DAL345 - 6 2026-07-11
DAL1994 - 6 2026-07-16
DAL683 Delta Air Lines 5 2026-04-29
DAL546 Delta Air Lines 5 2026-07-20
DAL448 - 5 2026-07-14
DAL1969 Delta Air Lines 5 2026-04-27
DAL1859 - 5 2026-07-02
DAL1780 - 5 2026-07-06
DAL1651 Delta Air Lines 5 2026-07-24
DAL905 Delta Air Lines 4 2026-07-23

Recent flights last 50

DateFlightRouteTakeoffLandingDuration
2026-07-26 DAL1209 IAH → LGA Jul 26, 21:10 UTCJul 26, 22:30 UTC1h 20m
2026-07-26 DAL1209 IAH → LGA Jul 26, 17:40 UTCJul 26, 19:05 UTC1h 25m
2026-07-26 DAL1009 JFK → LAS Jul 26, 11:35 UTCJul 26, 15:55 UTC4h 20m
2026-07-26 DAL2038 MKE → ATL Jul 26, 00:52 UTCJul 26, 04:37 UTC3h 45m
2026-07-26 DAL2038 MKE → ATL Jul 26, 00:55 UTCJul 26, 04:45 UTC3h 50m
2026-07-25 DAL1647 LAX → SLC Jul 25, 20:20 UTCJul 25, 21:40 UTC1h 20m
2026-07-25 DAL1647 LAX → SLC Jul 25, 20:18 UTCJul 25, 21:40 UTC1h 22m
2026-07-25 DAL504 BOS → ATL Jul 25, 14:05 UTCJul 25, 18:25 UTC4h 20m
2026-07-24 DAL718 JFK → PHX Jul 24, 23:20 UTCJul 25, 04:10 UTC4h 50m
2026-07-24 DAL1651 DCA → DTW Jul 24, 18:20 UTCJul 24, 21:40 UTC3h 20m
2026-07-24 DAL792 LAX → MSP Jul 24, 13:30 UTCJul 24, 16:35 UTC3h 5m
2026-07-23 DAL1876 SJD → LAX Jul 23, 22:20 UTCJul 23, 23:35 UTC1h 15m
2026-07-23 DAL1875 LAX → SJD Jul 23, 18:05 UTCJul 23, 19:30 UTC1h 25m
2026-07-23 DAL1875 LAX → SJD Jul 23, 18:04 UTCJul 23, 20:10 UTC2h 6m
2026-07-23 DAL996 ATL → LAX Jul 23, 11:25 UTCJul 23, 15:20 UTC3h 55m
2026-07-23 DAL905 SLC → ATL Jul 23, 00:42 UTCJul 23, 03:57 UTC3h 15m
2026-07-23 DAL905 SLC → ATL Jul 23, 00:45 UTCJul 23, 03:55 UTC3h 10m
2026-07-22 DAL1120 JFK → RSW Jul 22, 21:25 UTCJul 22, 23:00 UTC1h 35m
2026-07-22 DAL699 JFK → SEA Jul 22, 13:55 UTCJul 22, 19:30 UTC5h 35m
2026-07-21 DAL1966 ATL → JFK Jul 21, 23:55 UTCJul 22, 02:00 UTC2h 5m
2026-07-21 DAL1966 - Jul 21, 19:20 UTCJul 21, 21:05 UTC1h 45m
2026-07-21 DAL1966 - Jul 21, 17:35 UTCJul 21, 17:45 UTC10m
2026-07-21 DAL1966 - Jul 21, 15:45 UTCJul 21, 16:10 UTC25m
2026-07-21 DAL1966 - Jul 21, 12:45 UTCJul 21, 13:25 UTC40m
2026-07-21 DAL705 MCO → SEA Jul 21, 06:40 UTCJul 21, 10:30 UTC3h 50m
2026-07-20 DAL887 SLC → JFK Jul 20, 22:37 UTCJul 21, 03:02 UTC4h 25m
2026-07-20 DAL887 SLC → JFK Jul 20, 22:40 UTCJul 21, 03:10 UTC4h 29m
2026-07-20 DAL546 SFO → JFK Jul 20, 15:20 UTCJul 20, 19:45 UTC4h 25m
2026-07-20 DAL546 SFO → JFK Jul 20, 15:18 UTCJul 20, 19:39 UTC4h 21m
2026-07-20 DAL784 - Jul 20, 03:05 UTCJul 20, 07:20 UTC4h 15m
2026-07-20 DAL784 JFK → PHX Jul 20, 03:04 UTCJul 20, 07:28 UTC4h 24m
2026-07-19 DAL671 SLC → JFK Jul 19, 20:50 UTCJul 20, 00:45 UTC3h 55m
2026-07-19 DAL671 SLC → JFK Jul 19, 20:47 UTCJul 20, 00:44 UTC3h 57m
2026-07-19 DAL2031 MCO → BOS Jul 19, 14:55 UTCJul 19, 18:40 UTC3h 45m
2026-07-19 DAL2031 MCO → BOS Jul 19, 14:54 UTCJul 19, 18:38 UTC3h 44m
2026-07-19 DAL2555 ATL → GPT Jul 19, 11:25 UTCJul 19, 13:35 UTC2h 10m
2026-07-18 DAL708 LAX → DTW Jul 18, 23:15 UTCJul 19, 03:30 UTC4h 15m
2026-07-18 DAL1651 MSP → LAX Jul 18, 18:20 UTCJul 18, 21:30 UTC3h 10m
2026-07-18 DAL792 LAX → MSP Jul 18, 13:25 UTCJul 18, 16:40 UTC3h 15m
2026-07-17 DAL1876 - Jul 17, 22:25 UTCJul 17, 23:35 UTC1h 10m
2026-07-17 DAL1876 SJD → LAX Jul 17, 21:30 UTCJul 17, 23:30 UTC2h 0m
2026-07-17 DAL1875 - Jul 17, 18:00 UTCJul 17, 18:29 UTC30m
2026-07-17 DAL1875 LAX → SJD Jul 17, 18:00 UTCJul 17, 20:02 UTC2h 2m
2026-07-17 DAL996 ATL → LAX Jul 17, 11:25 UTCJul 17, 15:20 UTC3h 55m
2026-07-17 DAL302 DEN → ATL Jul 17, 06:50 UTCJul 17, 09:20 UTC2h 30m
2026-07-17 DAL424 JFK → DEN Jul 17, 00:45 UTCJul 17, 04:10 UTC3h 25m
2026-07-16 DAL1833 - Jul 16, 20:45 UTCJul 16, 21:35 UTC50m
2026-07-16 DAL1833 PUJ → JFK Jul 16, 18:14 UTCJul 16, 21:34 UTC3h 20m
2026-07-16 DAL1994 - Jul 16, 12:44 UTCJul 16, 13:40 UTC55m
2026-07-16 DAL1994 JFK → PUJ Jul 16, 12:42 UTCJul 16, 15:51 UTC3h 9m

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 N529DT page for operator, model, and routing details .

Mode-S A6AABA frequently asked

What is Mode-S code A6AABA?
A6AABA is an ICAO 24-bit transponder address. Allocated to United States. Assigned to N529DT.
Where is Mode-S A6AABA registered?
Mode-S code A6AABA 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 A6AABA broadcasting right now?
No active broadcast right now. Last signal was Jul 26, 22:30 UTC.
Hex, octal, and decimal Mode-S codes: what's the difference?
The same 24-bit identifier expressed in different bases: hex A6AABA, octal 51525272, decimal 10,922,682.
What flights does A6AABA operate?
Mode-S A6AABA has broadcast 20 distinct callsigns, including DAL1966, DAL977, DAL435, DAL784, DAL486.