Apparatus

Try JFK, AAL1290, BAW, or N225AN.

sensors Mode-S transponder

ACDBF4

ICAO 24-bit transponder address · allocated to United States

Currently assigned to N928AT · BOEING 717-200 · operated by DELTA AIR LINES INC

Hex
ACDBF4
Octal
53155764
Decimal
11,328,500
Country
US
Tail
N928AT
Type
B712
No current signal · last broadcast 10h ago
Flights observed
41
Distinct callsigns
20
Country
US
Last broadcast
10h ago

Last known position

Most recent position reported by Mode-S ACDBF4.

Country allocation

The ICAO 24-bit address ACDBF4 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
DAL3012 Delta Air Lines 3 2026-05-13
DAL2681 Delta Air Lines 3 2026-05-14
DAL2232 Delta Air Lines 3 2026-05-11
DAL940 Delta Air Lines 2 2026-05-09
DAL3190 Delta Air Lines 2 2026-05-10
DAL3180 Delta Air Lines 2 2026-05-11
DAL3163 Delta Air Lines 2 2026-05-14
DAL3100 Delta Air Lines 2 2026-05-09
DAL3032 Delta Air Lines 2 2026-05-09
DAL2862 Delta Air Lines 2 2026-05-13
DAL2571 Delta Air Lines 2 2026-05-08
DAL2539 Delta Air Lines 2 2026-05-10
DAL2144 Delta Air Lines 2 2026-05-10
DAL2116 Delta Air Lines 2 2026-05-12
DAL1640 Delta Air Lines 2 2026-05-11
DAL1160 Delta Air Lines 2 2026-05-10
DAL9979 Delta Air Lines 1 2026-05-08
DAL82 Delta Air Lines 1 2026-05-12
DAL3186 Delta Air Lines 1 2026-05-11
DAL3177 Delta Air Lines 1 2026-05-11

Recent flights last 41

DateFlightRouteTakeoffLandingDuration
2026-05-14 DAL3163 BWI → DTW May 14, 22:45 UTCMay 14, 23:20 UTC35m
2026-05-14 DAL3163 BWI → DTW May 14, 19:15 UTCMay 14, 19:40 UTC25m
2026-05-14 DAL2681 MSN → ATL May 14, 16:05 UTCMay 14, 17:35 UTC1h 30m
2026-05-14 DAL2681 MSN → ATL May 14, 16:05 UTCMay 14, 17:36 UTC1h 31m
2026-05-14 DAL2681 MSN → ATL May 14, 13:20 UTCMay 14, 15:10 UTC1h 50m
2026-05-13 DAL2862 ATL → OKC May 13, 22:25 UTCMay 14, 00:05 UTC1h 40m
2026-05-13 DAL2862 ATL → OKC May 13, 19:30 UTCMay 13, 21:15 UTC1h 45m
2026-05-13 DAL3012 BHM → ATL May 13, 17:35 UTCMay 13, 18:10 UTC35m
2026-05-13 DAL3012 BHM → ATL May 13, 17:32 UTCMay 13, 18:09 UTC37m
2026-05-13 DAL3012 BHM → ATL May 13, 16:10 UTCMay 13, 16:35 UTC25m
2026-05-12 DAL82 ATL → CDG May 12, 16:45 UTCMay 12, 17:35 UTC50m
2026-05-12 DAL2937 ATL → CMH May 12, 14:15 UTCMay 12, 15:10 UTC55m
2026-05-12 DAL2116 TPA → LGA May 12, 12:15 UTCMay 12, 12:55 UTC40m
2026-05-12 DAL2116 TPA → LGA May 12, 12:13 UTCMay 12, 12:54 UTC41m
2026-05-11 DAL3112 ATL → SAV May 11, 21:05 UTCMay 11, 21:50 UTC45m
2026-05-11 DAL1640 LAX → JFK May 11, 18:45 UTCMay 11, 19:30 UTC45m
2026-05-11 DAL1640 LAX → JFK May 11, 16:30 UTCMay 11, 17:20 UTC51m
2026-05-11 DAL2232 DTW → GSP May 11, 14:15 UTCMay 11, 15:05 UTC50m
2026-05-11 DAL2232 DTW → GSP May 11, 14:11 UTCMay 11, 15:02 UTC51m
2026-05-11 DAL2232 DTW → GSP May 11, 12:20 UTCMay 11, 13:10 UTC50m
2026-05-11 DAL3186 MEM → ATL May 11, 09:50 UTCMay 11, 10:30 UTC40m
2026-05-11 DAL3177 GPT → ATL May 11, 02:55 UTCMay 11, 03:40 UTC45m
2026-05-11 DAL3180 JAN → ATL May 11, 00:32 UTCMay 11, 01:25 UTC53m
2026-05-10 DAL3180 JAN → ATL May 10, 22:35 UTCMay 10, 23:09 UTC35m
2026-05-10 DAL2539 FLL → CVG May 10, 20:25 UTCMay 10, 21:14 UTC50m
2026-05-10 DAL2539 FLL → CVG May 10, 18:35 UTCMay 10, 19:24 UTC50m
2026-05-10 DAL3190 ATL → CLT May 10, 16:55 UTCMay 10, 17:34 UTC40m
2026-05-10 DAL3190 ATL → CLT May 10, 14:30 UTCMay 10, 15:09 UTC40m
2026-05-10 DAL1160 MSN → ATL May 10, 10:49 UTCMay 10, 12:34 UTC1h 45m
2026-05-10 DAL1160 MSN → ATL May 10, 10:49 UTCMay 10, 12:32 UTC1h 43m
2026-05-10 DAL2144 SLC → SJC May 10, 00:00 UTCMay 10, 01:34 UTC1h 35m
2026-05-09 DAL2144 SLC → SJC May 9, 23:57 UTCMay 10, 01:32 UTC1h 35m
2026-05-09 DAL3032 ATL → CAE May 9, 22:00 UTCMay 9, 22:39 UTC40m
2026-05-09 DAL3032 ATL → CAE May 9, 20:10 UTCMay 9, 20:49 UTC40m
2026-05-09 DAL940 LAX → TPA May 9, 18:10 UTCMay 9, 18:50 UTC40m
2026-05-09 DAL940 LAX → TPA May 9, 16:20 UTCMay 9, 17:00 UTC40m
2026-05-09 DAL3100 ATL → BHM May 9, 14:35 UTCMay 9, 15:15 UTC40m
2026-05-09 DAL3100 ATL → BHM May 9, 13:00 UTCMay 9, 13:25 UTC25m
2026-05-08 DAL2571 LGA → ORD May 8, 22:10 UTCMay 8, 22:40 UTC30m
2026-05-08 DAL2571 LGA → ORD May 8, 20:45 UTCMay 8, 21:10 UTC25m
2026-05-08 DAL9979 JFK → CVG May 8, 00:25 UTCMay 8, 02:35 UTC2h 10m

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 N928AT page for operator, model, and routing details .

Mode-S ACDBF4 frequently asked

What is Mode-S code ACDBF4?
ACDBF4 is an ICAO 24-bit transponder address. Allocated to United States. Assigned to N928AT.
Where is Mode-S ACDBF4 registered?
Mode-S code ACDBF4 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 ACDBF4 broadcasting right now?
No active broadcast right now. Last signal was 10h ago.
Hex, octal, and decimal Mode-S codes: what's the difference?
The same 24-bit identifier expressed in different bases: hex ACDBF4, octal 53155764, decimal 11,328,500.
What flights does ACDBF4 operate?
Mode-S ACDBF4 has broadcast 20 distinct callsigns, including DAL3012, DAL2681, DAL2232, DAL940, DAL3190.