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 DAL876 · 29,150 ft
Flights observed
312
Distinct callsigns
20
Country
US
Last broadcast
13h 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
DAL2822 - 7 2026-06-13
DAL2163 Delta Air Lines 7 2026-05-31
DAL1681 - 7 2026-06-28
DAL1640 Delta Air Lines 7 2026-06-29
DAL2868 - 6 2026-06-25
DAL2761 - 6 2026-06-22
DAL2684 - 6 2026-06-22
DAL2402 Delta Air Lines 6 2026-06-14
DAL1374 - 6 2026-06-20
DAL3173 Delta Air Lines 5 2026-06-28
DAL2968 Delta Air Lines 5 2026-06-01
DAL2737 Delta Air Lines 5 2026-06-02
DAL2232 Delta Air Lines 5 2026-05-15
DAL1371 Delta Air Lines 5 2026-05-28
DAL1132 Delta Air Lines 5 2026-06-04
DAL844 Delta Air Lines 4 2026-06-01
DAL3163 Delta Air Lines 4 2026-06-11
DAL3032 - 4 2026-06-16
DAL3006 Delta Air Lines 4 2026-06-22
DAL2814 Delta Air Lines 4 2026-06-02

Recent flights last 50

DateFlightRouteTakeoffLandingDuration
2026-06-29 DAL1021 - Jun 29, 22:05 UTCJun 29, 22:39 UTC35m
2026-06-29 DAL1021 ATL → GSP Jun 29, 22:00 UTCJun 29, 22:34 UTC34m
2026-06-29 DAL1640 LAX → JFK Jun 29, 19:09 UTCJun 29, 20:00 UTC50m
2026-06-29 DAL1640 LAX → JFK Jun 29, 19:08 UTCJun 29, 19:57 UTC49m
2026-06-29 DAL1640 LAX → JFK Jun 29, 16:55 UTCJun 29, 17:45 UTC50m
2026-06-29 DAL1158 OKC → ATL Jun 29, 13:44 UTCJun 29, 15:30 UTC1h 45m
2026-06-29 DAL1158 OKC → ATL Jun 29, 13:44 UTCJun 29, 15:22 UTC1h 38m
2026-06-28 DAL2784 ATL → OKC Jun 28, 22:24 UTCJun 29, 00:00 UTC1h 35m
2026-06-28 DAL1681 - Jun 28, 19:55 UTCJun 28, 20:45 UTC50m
2026-06-28 DAL1681 - Jun 28, 17:44 UTCJun 28, 18:34 UTC50m
2026-06-28 DAL3173 ATL → GSO Jun 28, 15:29 UTCJun 28, 16:14 UTC45m
2026-06-28 DAL3173 ATL → GSO Jun 28, 13:19 UTCJun 28, 14:09 UTC50m
2026-06-28 DAL3041 - Jun 28, 11:14 UTCJun 28, 12:05 UTC50m
2026-06-27 DAL3180 - Jun 27, 21:59 UTCJun 27, 22:35 UTC35m
2026-06-27 DAL1549 MSP → ATL Jun 27, 19:39 UTCJun 27, 20:24 UTC45m
2026-06-27 DAL1549 MSP → ATL Jun 27, 18:04 UTCJun 27, 18:39 UTC35m
2026-06-27 DAL3173 ATL → GSO Jun 27, 16:10 UTCJun 27, 16:59 UTC50m
2026-06-27 DAL3173 ATL → GSO Jun 27, 16:07 UTCJun 27, 16:56 UTC49m
2026-06-27 DAL3173 ATL → GSO Jun 27, 14:05 UTCJun 27, 14:54 UTC50m
2026-06-27 DAL1160 - Jun 27, 10:54 UTCJun 27, 12:50 UTC1h 55m
2026-06-27 DAL2144 ATL → MSN Jun 27, 04:24 UTCJun 27, 06:05 UTC1h 40m
2026-06-27 DAL1959 - Jun 27, 01:54 UTCJun 27, 02:39 UTC45m
2026-06-27 DAL1959 - Jun 27, 00:20 UTCJun 27, 01:00 UTC40m
2026-06-26 DAL3026 - Jun 26, 21:24 UTCJun 26, 21:59 UTC35m
2026-06-26 DAL3026 - Jun 26, 19:50 UTCJun 26, 20:20 UTC30m
2026-06-26 DAL3096 - Jun 26, 17:19 UTCJun 26, 18:15 UTC55m
2026-06-26 DAL3096 ATL → LEX Jun 26, 15:15 UTCJun 26, 16:05 UTC50m
2026-06-26 DAL1625 JFK → MCO Jun 26, 12:34 UTCJun 26, 13:24 UTC50m
2026-06-26 DAL1625 JFK → MCO Jun 26, 12:29 UTCJun 26, 13:25 UTC56m
2026-06-26 DAL1230 - Jun 26, 00:15 UTCJun 26, 01:39 UTC1h 25m
2026-06-25 DAL1821 ATL → CMH Jun 25, 20:59 UTCJun 25, 22:34 UTC1h 35m
2026-06-25 DAL1821 ATL → CMH Jun 25, 18:04 UTCJun 25, 19:20 UTC1h 15m
2026-06-25 DAL2868 - Jun 25, 15:29 UTCJun 25, 16:35 UTC1h 5m
2026-06-25 DAL2868 - Jun 25, 13:14 UTCJun 25, 14:20 UTC1h 5m
2026-06-25 DAL2596 - Jun 25, 10:20 UTCJun 25, 11:39 UTC1h 20m
2026-06-25 DAL2609 - Jun 25, 01:50 UTCJun 25, 02:54 UTC1h 5m
2026-06-24 DAL1391 EWR → DTW Jun 24, 21:40 UTCJun 24, 22:55 UTC1h 15m
2026-06-24 DAL1391 EWR → DTW Jun 24, 19:04 UTCJun 24, 20:20 UTC1h 15m
2026-06-24 DAL1546 - Jun 24, 16:34 UTCJun 24, 17:45 UTC1h 10m
2026-06-24 DAL1546 - Jun 24, 14:20 UTCJun 24, 15:14 UTC55m
2026-06-24 DAL2370 - Jun 24, 11:45 UTCJun 24, 13:05 UTC1h 20m
2026-06-24 DAL1230 - Jun 24, 00:15 UTCJun 24, 01:39 UTC1h 25m
2026-06-23 DAL1821 ATL → CMH Jun 23, 20:59 UTCJun 23, 22:44 UTC1h 45m
2026-06-23 DAL1821 ATL → CMH Jun 23, 18:14 UTCJun 23, 19:39 UTC1h 25m
2026-06-23 DAL2868 - Jun 23, 15:30 UTCJun 23, 16:35 UTC1h 5m
2026-06-23 DAL2868 - Jun 23, 13:15 UTCJun 23, 14:25 UTC1h 10m
2026-06-23 DAL2596 - Jun 23, 10:19 UTCJun 23, 11:40 UTC1h 20m
2026-06-23 DAL2609 - Jun 23, 03:25 UTCJun 23, 04:39 UTC1h 15m
2026-06-23 DAL2609 DTW → EWR Jun 23, 03:21 UTCJun 23, 04:36 UTC1h 15m
2026-06-22 DAL2761 - Jun 22, 22:54 UTCJun 23, 00:15 UTC1h 20m

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 DAL2822, DAL2163, DAL1681, DAL1640, DAL2868.