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
Broadcasting now · callsign DAL1248 · 27,000 ft
Flights observed
475
Distinct callsigns
20
Country
US
Last broadcast
18d ago

Current position

ACDBF4 is currently broadcasting. Map zoomed to live position.

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
DAL2684 - 8 2026-07-20
DAL3173 Delta Air Lines 7 2026-07-19
DAL3163 - 7 2026-07-14
DAL2822 - 7 2026-06-13
DAL2681 - 7 2026-07-16
DAL2163 Delta Air Lines 7 2026-05-31
DAL1681 - 7 2026-06-28
DAL1640 Delta Air Lines 7 2026-06-29
DAL3012 - 6 2026-07-13
DAL2868 - 6 2026-06-25
DAL2761 - 6 2026-06-22
DAL2402 Delta Air Lines 6 2026-06-14
DAL1374 - 6 2026-06-20
DAL731 Delta Air Lines 5 2026-07-22
DAL3199 - 5 2026-07-09
DAL3033 - 5 2026-07-23
DAL3006 Delta Air Lines 5 2026-07-25
DAL2968 Delta Air Lines 5 2026-06-01
DAL2862 - 5 2026-07-08
DAL2737 Delta Air Lines 5 2026-06-02

Recent flights last 50

DateFlightRouteTakeoffLandingDuration
2026-07-26 DAL1621 SFO → JFK Jul 26, 18:35 UTCJul 26, 19:55 UTC1h 20m
2026-07-25 DAL2060 EWR → ATL Jul 25, 17:25 UTCJul 25, 18:50 UTC1h 25m
2026-07-25 DAL2060 EWR → ATL Jul 25, 17:24 UTCJul 25, 18:55 UTC1h 31m
2026-07-25 DAL2060 EWR → ATL Jul 25, 14:25 UTCJul 25, 15:50 UTC1h 25m
2026-07-25 DAL3006 RSW → DTW Jul 25, 11:35 UTCJul 25, 13:10 UTC1h 35m
2026-07-25 DAL2034 SLC → SJC Jul 25, 03:35 UTCJul 25, 04:05 UTC30m
2026-07-25 DAL2470 LGA → MSY Jul 25, 01:50 UTCJul 25, 02:25 UTC35m
2026-07-25 DAL2470 LGA → MSY Jul 25, 01:46 UTCJul 25, 02:22 UTC36m
2026-07-25 DAL2371 DTW → PHL Jul 25, 00:30 UTCJul 25, 01:05 UTC35m
2026-07-24 DAL3027 ATL → LIT Jul 24, 22:10 UTCJul 24, 23:30 UTC1h 20m
2026-07-24 DAL3027 ATL → LIT Jul 24, 19:35 UTCJul 24, 20:35 UTC1h 0m
2026-07-24 DAL3045 - Jul 24, 16:55 UTCJul 24, 17:40 UTC45m
2026-07-24 DAL3045 - Jul 24, 15:15 UTCJul 24, 15:55 UTC40m
2026-07-24 DAL1680 IAH → LGA Jul 24, 11:15 UTCJul 24, 12:40 UTC1h 25m
2026-07-24 DAL1105 JFK → SFO Jul 24, 01:25 UTCJul 24, 02:45 UTC1h 20m
2026-07-24 DAL1105 JFK → SFO Jul 24, 01:25 UTCJul 24, 02:41 UTC1h 16m
2026-07-23 DAL2878 SEA → SLC Jul 23, 22:55 UTCJul 23, 23:40 UTC45m
2026-07-23 DAL2878 SEA → SLC Jul 23, 21:15 UTCJul 23, 21:45 UTC30m
2026-07-23 DAL2718 ATL → BDL Jul 23, 19:00 UTCJul 23, 19:50 UTC50m
2026-07-23 DAL2718 ATL → BDL Jul 23, 18:52 UTCJul 23, 19:46 UTC54m
2026-07-23 DAL2718 ATL → BDL Jul 23, 17:00 UTCJul 23, 17:45 UTC45m
2026-07-23 DAL3033 - Jul 23, 14:40 UTCJul 23, 15:50 UTC1h 10m
2026-07-23 DAL3033 LIT → ATL Jul 23, 14:36 UTCJul 23, 15:45 UTC1h 9m
2026-07-23 DAL3033 - Jul 23, 12:25 UTCJul 23, 13:20 UTC55m
2026-07-23 DAL2712 AVL → ATL Jul 23, 09:50 UTCJul 23, 10:25 UTC35m
2026-07-23 DAL3116 SFO → SEA Jul 23, 02:55 UTCJul 23, 03:45 UTC50m
2026-07-23 DAL3116 SFO → SEA Jul 23, 02:51 UTCJul 23, 03:42 UTC51m
2026-07-22 DAL2780 LGA → MIA Jul 22, 23:50 UTCJul 23, 01:35 UTC1h 45m
2026-07-22 DAL2780 LGA → MIA Jul 22, 23:45 UTCJul 23, 01:29 UTC1h 44m
2026-07-22 DAL2780 LGA → MIA Jul 22, 21:05 UTCJul 22, 22:40 UTC1h 35m
2026-07-22 DAL731 BOS → FLL Jul 22, 18:40 UTCJul 22, 19:35 UTC55m
2026-07-22 DAL731 BOS → FLL Jul 22, 18:33 UTCJul 22, 19:30 UTC57m
2026-07-22 DAL731 BOS → FLL Jul 22, 16:20 UTCJul 22, 17:10 UTC50m
2026-07-22 DAL2044 ATL → BDL Jul 22, 01:25 UTCJul 22, 03:20 UTC1h 55m
2026-07-21 DAL2044 ATL → BDL Jul 21, 17:15 UTCJul 21, 17:40 UTC25m
2026-07-21 DAL2044 ATL → BDL Jul 21, 13:50 UTCJul 21, 16:20 UTC2h 30m
2026-07-21 DAL1146 LGA → MSP Jul 21, 10:50 UTCJul 21, 11:20 UTC30m
2026-07-21 DAL1561 RSW → CVG Jul 21, 02:05 UTCJul 21, 03:15 UTC1h 10m
2026-07-20 DAL2676 SFO → SEA Jul 20, 23:15 UTCJul 21, 00:55 UTC1h 39m
2026-07-20 DAL2676 SFO → SEA Jul 20, 23:14 UTCJul 21, 00:48 UTC1h 34m
2026-07-20 DAL2676 SFO → SEA Jul 20, 20:30 UTCJul 20, 21:55 UTC1h 25m
2026-07-20 DAL2684 - Jul 20, 17:40 UTCJul 20, 18:55 UTC1h 15m
2026-07-20 DAL2684 - Jul 20, 14:45 UTCJul 20, 15:55 UTC1h 10m
2026-07-20 DAL2370 ATL → TLH Jul 20, 11:40 UTCJul 20, 13:20 UTC1h 40m
2026-07-20 DAL1577 AUS → DTW Jul 20, 04:06 UTCJul 20, 04:57 UTC51m
2026-07-20 DAL1577 AUS → DTW Jul 20, 04:10 UTCJul 20, 05:00 UTC50m
2026-07-20 DAL3042 ATL → TYS Jul 20, 01:45 UTCJul 20, 02:15 UTC30m
2026-07-20 DAL3042 ATL → TYS Jul 20, 01:43 UTCJul 20, 02:09 UTC26m
2026-07-20 DAL3042 ATL → TYS Jul 20, 00:25 UTCJul 20, 00:55 UTC30m
2026-07-19 DAL1347 TPA → LGA Jul 19, 20:55 UTCJul 19, 22:25 UTC1h 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 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?
Yes. Mode-S ACDBF4 is currently airborne.
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 DAL2684, DAL3173, DAL3163, DAL2822, DAL2681.