Apparatus

Try JFK, AAL1290, BAW, or N225AN.

sensors Mode-S transponder

A6EACF

ICAO 24-bit transponder address · allocated to United States

Currently assigned to N545DE · AIRBUS A-321neo · operated by DELTA AIR LINES INC

Hex
A6EACF
Octal
51565317
Decimal
10,939,087
Country
US
Tail
N545DE
Type
A21N
No current signal · last broadcast Jul 26, 21:45 UTC
Flights observed
454
Distinct callsigns
20
Country
US
Last broadcast
Jul 26, 21:45 UTC

Last known position

Most recent position reported by Mode-S A6EACF.

Country allocation

The ICAO 24-bit address A6EACF 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 - 15 2026-07-12
DAL897 - 8 2026-07-18
DAL384 - 8 2026-07-12
DAL359 Delta Air Lines 8 2026-05-22
DAL1580 Delta Air Lines 8 2026-05-14
DAL485 - 7 2026-07-08
DAL459 Delta Air Lines 7 2026-07-06
DAL2223 - 7 2026-07-19
DAL658 - 6 2026-07-17
DAL473 - 6 2026-07-11
DAL448 - 6 2026-04-13
DAL422 - 6 2026-07-03
DAL419 - 6 2026-07-17
DAL351 Delta Air Lines 6 2026-05-21
DAL2713 - 6 2026-07-19
DAL830 - 5 2026-06-18
DAL571 - 5 2026-07-07
DAL526 - 5 2026-07-18
DAL465 - 5 2026-06-20
DAL407 Delta Air Lines 5 2026-05-02

Recent flights last 50

DateFlightRouteTakeoffLandingDuration
2026-07-26 DAL438 SEA → AUS Jul 26, 18:35 UTCJul 26, 21:45 UTC3h 10m
2026-07-26 DAL2092 BNA → LAX Jul 26, 11:20 UTCJul 26, 16:45 UTC5h 25m
2026-07-26 DAL1114 ATL → LGA Jul 26, 04:35 UTCJul 26, 08:50 UTC4h 16m
2026-07-26 DAL1114 ATL → LGA Jul 26, 04:35 UTCJul 26, 08:45 UTC4h 10m
2026-07-25 DAL786 ATL → LEX Jul 25, 20:50 UTCJul 26, 02:25 UTC5h 35m
2026-07-25 DAL786 ATL → LEX Jul 25, 14:35 UTCJul 25, 18:50 UTC4h 15m
2026-07-25 DAL394 SJC → ATL Jul 25, 11:20 UTCJul 25, 12:20 UTC1h 0m
2026-07-24 DAL344 SEA → LIH Jul 24, 23:35 UTCJul 25, 00:30 UTC55m
2026-07-24 DAL648 MSP → CUN Jul 24, 15:30 UTCJul 24, 20:20 UTC4h 50m
2026-07-23 DAL2053 DTW → ATL Jul 23, 22:45 UTCJul 24, 00:10 UTC1h 25m
2026-07-23 DAL470 DTW → PWM Jul 23, 17:15 UTCJul 23, 20:40 UTC3h 25m
2026-07-23 DAL659 JFK → AUS Jul 23, 12:05 UTCJul 23, 15:40 UTC3h 35m
2026-07-23 DAL659 JFK → AUS Jul 23, 12:03 UTCJul 23, 15:37 UTC3h 34m
2026-07-22 DAL875 LGA → ATL Jul 22, 22:20 UTCJul 23, 01:35 UTC3h 15m
2026-07-22 DAL917 DFW → ATL Jul 22, 16:15 UTCJul 22, 20:55 UTC4h 40m
2026-07-22 DAL1942 - Jul 22, 11:55 UTCJul 22, 14:00 UTC2h 5m
2026-07-22 DAL1942 SDQ → JFK Jul 22, 10:15 UTCJul 22, 13:55 UTC3h 40m
2026-07-22 DAL1943 JFK → SDQ Jul 22, 04:30 UTCJul 22, 05:20 UTC50m
2026-07-22 DAL1943 JFK → SDQ Jul 22, 04:30 UTCJul 22, 08:03 UTC3h 33m
2026-07-21 DAL1833 PUJ → JFK Jul 21, 22:05 UTCJul 22, 02:00 UTC3h 55m
2026-07-21 DAL1833 JFK → JFK Jul 21, 12:50 UTCJul 22, 02:05 UTC13h 15m
2026-07-20 DAL1908 JFK → SDQ Jul 20, 18:20 UTCJul 21, 03:30 UTC9h 10m
2026-07-20 DAL336 DFW → LGA Jul 20, 12:55 UTCJul 20, 16:25 UTC3h 30m
2026-07-20 DAL493 ATL → DEN Jul 20, 01:25 UTCJul 20, 03:50 UTC2h 25m
2026-07-20 DAL493 ATL → DEN Jul 20, 01:24 UTCJul 20, 03:51 UTC2h 27m
2026-07-19 DAL906 SLC → ATL Jul 19, 19:55 UTCJul 19, 23:30 UTC3h 35m
2026-07-19 DAL1698 LAS → SLC Jul 19, 17:35 UTCJul 19, 18:30 UTC55m
2026-07-19 DAL1698 SLC → LAS Jul 19, 14:35 UTCJul 19, 15:30 UTC55m
2026-07-19 DAL2223 - Jul 19, 08:45 UTCJul 19, 12:55 UTC4h 10m
2026-07-19 DAL2223 ANC → SLC Jul 19, 08:44 UTCJul 19, 12:52 UTC4h 8m
2026-07-19 DAL2713 SLC → ANC Jul 19, 02:45 UTCJul 19, 07:15 UTC4h 30m
2026-07-18 DAL526 ATL → SLC Jul 18, 20:30 UTCJul 18, 23:40 UTC3h 10m
2026-07-18 DAL897 SLC → ATL Jul 18, 14:25 UTCJul 18, 17:48 UTC3h 23m
2026-07-18 DAL897 SLC → ATL Jul 18, 14:25 UTCJul 18, 17:50 UTC3h 25m
2026-07-18 DAL2036 BOS → NAS Jul 18, 00:25 UTCJul 18, 04:30 UTC4h 6m
2026-07-17 DAL482 JFK → ATL Jul 17, 21:15 UTCJul 17, 22:15 UTC1h 0m
2026-07-17 DAL482 JFK → ATL Jul 17, 21:10 UTCJul 17, 22:12 UTC1h 2m
2026-07-17 DAL482 JFK → ATL Jul 17, 14:44 UTCJul 17, 19:40 UTC4h 55m
2026-07-17 DAL658 - Jul 17, 11:55 UTCJul 17, 12:40 UTC45m
2026-07-17 DAL658 - Jul 17, 07:40 UTCJul 17, 08:00 UTC20m
2026-07-17 DAL419 - Jul 17, 05:45 UTCJul 17, 06:00 UTC15m
2026-07-17 DAL419 - Jul 17, 00:35 UTCJul 17, 01:29 UTC55m
2026-07-16 DAL1045 - Jul 16, 19:35 UTCJul 16, 21:45 UTC2h 10m
2026-07-16 DAL1045 LAX → SEA Jul 16, 19:31 UTCJul 16, 21:42 UTC2h 11m
2026-07-16 DAL658 - Jul 16, 12:00 UTCJul 16, 12:40 UTC40m
2026-07-16 DAL658 - Jul 16, 07:50 UTCJul 16, 08:05 UTC15m
2026-07-16 DAL419 - Jul 16, 04:50 UTCJul 16, 05:15 UTC25m
2026-07-15 DAL419 SEA → HNL Jul 15, 23:32 UTCJul 16, 05:08 UTC5h 36m
2026-07-15 DAL419 - Jul 15, 23:35 UTCJul 16, 00:30 UTC55m
2026-07-15 DAL1719 JFK → SEA Jul 15, 15:50 UTCJul 15, 21:15 UTC5h 25m

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 N545DE page for operator, model, and routing details .

Mode-S A6EACF frequently asked

What is Mode-S code A6EACF?
A6EACF is an ICAO 24-bit transponder address. Allocated to United States. Assigned to N545DE.
Where is Mode-S A6EACF registered?
Mode-S code A6EACF 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 A6EACF 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 A6EACF, octal 51565317, decimal 10,939,087.
What flights does A6EACF operate?
Mode-S A6EACF has broadcast 20 distinct callsigns, including DAL1780, DAL897, DAL384, DAL359, DAL1580.