Apparatus

Try JFK, AAL1290, BAW, or N225AN.

sensors Mode-S transponder

A451DB

ICAO 24-bit transponder address · allocated to United States

Currently assigned to N378DN · AIRBUS A-321 · operated by BANK OF UTAH TRUSTEE

Hex
A451DB
Octal
51050733
Decimal
10,768,859
Country
US
Tail
N378DN
Type
A321
No current signal · last broadcast Jul 26, 22:05 UTC
Flights observed
556
Distinct callsigns
20
Country
US
Last broadcast
Jul 26, 22:05 UTC

Last known position

Most recent position reported by Mode-S A451DB.

Country allocation

The ICAO 24-bit address A451DB 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
DAL1659 Delta Air Lines 13 2026-07-23
DAL1181 Delta Air Lines 9 2026-07-26
DAL994 Delta Air Lines 8 2026-06-02
DAL2016 Delta Air Lines 8 2026-07-23
DAL550 Delta Air Lines 7 2026-07-21
DAL434 - 7 2026-06-24
DAL433 Delta Air Lines 7 2026-07-25
DAL2858 Delta Air Lines 7 2026-07-23
DAL2589 Delta Air Lines 7 2026-06-02
DAL995 - 6 2026-06-22
DAL975 Delta Air Lines 6 2026-06-03
DAL840 - 6 2026-07-10
DAL706 Delta Air Lines 6 2026-05-13
DAL1413 Delta Air Lines 6 2026-07-24
DAL1252 Delta Air Lines 6 2026-07-23
DAL990 - 5 2026-07-03
DAL956 - 5 2026-07-13
DAL765 Delta Air Lines 5 2026-07-22
DAL557 Delta Air Lines 5 2026-05-26
DAL342 Delta Air Lines 5 2026-05-14

Recent flights last 50

DateFlightRouteTakeoffLandingDuration
2026-07-26 DAL1181 BOS → AUS Jul 26, 19:35 UTCJul 26, 22:00 UTC2h 25m
2026-07-26 DAL1181 BOS → AUS Jul 26, 15:10 UTCJul 26, 17:30 UTC2h 20m
2026-07-26 DAL1573 BOS → TPA Jul 26, 11:05 UTCJul 26, 13:10 UTC2h 5m
2026-07-25 DAL2561 JFK → TPA Jul 25, 23:15 UTCJul 26, 01:20 UTC2h 5m
2026-07-25 DAL433 LGA → ATL Jul 25, 19:45 UTCJul 25, 21:30 UTC1h 45m
2026-07-25 DAL433 LGA → ATL Jul 25, 19:45 UTCJul 25, 21:21 UTC1h 36m
2026-07-25 DAL1510 MIA → ATL Jul 25, 16:55 UTCJul 25, 18:15 UTC1h 20m
2026-07-25 DAL1510 MIA → ATL Jul 25, 16:51 UTCJul 25, 18:14 UTC1h 23m
2026-07-25 DAL1510 MIA → ATL Jul 25, 13:20 UTCJul 25, 15:20 UTC2h 0m
2026-07-25 DAL1460 RIC → ATL Jul 25, 10:25 UTCJul 25, 11:35 UTC1h 10m
2026-07-25 DAL1460 RIC → ATL Jul 25, 10:20 UTCJul 25, 11:33 UTC1h 13m
2026-07-25 DAL1426 JFK → DFW Jul 25, 02:00 UTCJul 25, 03:05 UTC1h 5m
2026-07-24 DAL1413 SAN → SEA Jul 24, 22:15 UTCJul 24, 23:40 UTC1h 25m
2026-07-24 DAL1413 SAN → SEA Jul 24, 22:12 UTCJul 24, 23:44 UTC1h 32m
2026-07-24 DAL1413 SAN → SEA Jul 24, 18:00 UTCJul 24, 19:25 UTC1h 25m
2026-07-24 DAL989 ATL → ONT Jul 24, 14:25 UTCJul 24, 16:15 UTC1h 50m
2026-07-24 DAL1487 TPA → BOS Jul 24, 11:15 UTCJul 24, 12:30 UTC1h 15m
2026-07-24 DAL1487 TPA → BOS Jul 24, 11:14 UTCJul 24, 12:24 UTC1h 10m
2026-07-24 DAL2841 SFO → LAX Jul 24, 06:05 UTCJul 24, 09:00 UTC2h 55m
2026-07-24 DAL833 SEA → MCO Jul 24, 02:35 UTCJul 24, 03:55 UTC1h 20m
2026-07-23 DAL1252 MSP → BOS Jul 23, 23:37 UTCJul 24, 01:09 UTC1h 32m
2026-07-23 DAL1252 MSP → BOS Jul 23, 23:40 UTCJul 24, 01:10 UTC1h 30m
2026-07-23 DAL1659 BOS → DTW Jul 23, 20:30 UTCJul 23, 21:30 UTC1h 0m
2026-07-23 DAL1659 BOS → DTW Jul 23, 17:50 UTCJul 23, 18:55 UTC1h 5m
2026-07-23 DAL2858 SLC → SJC Jul 23, 14:30 UTCJul 23, 16:00 UTC1h 30m
2026-07-23 DAL2016 BOS → ORD Jul 23, 03:23 UTCJul 23, 05:06 UTC1h 43m
2026-07-23 DAL2016 BOS → ORD Jul 23, 03:25 UTCJul 23, 05:10 UTC1h 45m
2026-07-22 DAL765 DTW → SLC Jul 22, 22:05 UTCJul 23, 01:30 UTC3h 25m
2026-07-22 DAL308 JFK → SEA Jul 22, 18:55 UTCJul 22, 20:20 UTC1h 25m
2026-07-22 DAL2466 - Jul 22, 10:20 UTCJul 22, 11:25 UTC1h 5m
2026-07-22 DAL1606 ATL → PBI Jul 22, 03:55 UTCJul 22, 05:10 UTC1h 15m
2026-07-21 DAL1803 SDQ → ATL Jul 21, 20:30 UTCJul 21, 23:10 UTC2h 40m
2026-07-21 DAL1958 ATL → SDQ Jul 21, 15:10 UTCJul 21, 16:25 UTC1h 15m
2026-07-21 DAL550 BOS → ATL Jul 21, 10:25 UTCJul 21, 12:10 UTC1h 45m
2026-07-21 DAL490 LGA → ATL Jul 21, 00:55 UTCJul 21, 02:45 UTC1h 50m
2026-07-20 DAL1413 - Jul 20, 21:55 UTCJul 20, 23:25 UTC1h 30m
2026-07-20 DAL1413 FLL → ATL Jul 20, 21:54 UTCJul 20, 23:21 UTC1h 27m
2026-07-20 DAL1413 ATL → FLL Jul 20, 18:15 UTCJul 20, 19:50 UTC1h 35m
2026-07-20 DAL1585 - Jul 20, 15:05 UTCJul 20, 16:45 UTC1h 40m
2026-07-20 DAL1585 ATL → IAH Jul 20, 11:45 UTCJul 20, 13:20 UTC1h 35m
2026-07-20 DAL912 CLT → ATL Jul 20, 07:00 UTCJul 20, 10:15 UTC3h 15m
2026-07-20 DAL833 - Jul 20, 02:20 UTCJul 20, 03:50 UTC1h 30m
2026-07-19 DAL1252 MSP → BOS Jul 19, 23:20 UTCJul 20, 00:55 UTC1h 35m
2026-07-19 DAL1659 - Jul 19, 20:35 UTCJul 19, 20:45 UTC10m
2026-07-19 DAL1659 LAS → SLC Jul 19, 20:33 UTCJul 19, 21:26 UTC53m
2026-07-19 DAL1659 SLC → LAS Jul 19, 17:55 UTCJul 19, 18:50 UTC55m
2026-07-19 DAL2858 SEA → SLC Jul 19, 14:35 UTCJul 19, 16:10 UTC1h 35m
2026-07-19 DAL2858 SEA → SLC Jul 19, 14:35 UTCJul 19, 16:15 UTC1h 40m
2026-07-19 DAL2016 SLC → SEA Jul 19, 03:05 UTCJul 19, 04:45 UTC1h 40m
2026-07-18 DAL765 DTW → SLC Jul 18, 22:20 UTCJul 19, 00:45 UTC2h 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 N378DN page for operator, model, and routing details .

Mode-S A451DB frequently asked

What is Mode-S code A451DB?
A451DB is an ICAO 24-bit transponder address. Allocated to United States. Assigned to N378DN.
Where is Mode-S A451DB registered?
Mode-S code A451DB 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 A451DB broadcasting right now?
No active broadcast right now. Last signal was Jul 26, 22:05 UTC.
Hex, octal, and decimal Mode-S codes: what's the difference?
The same 24-bit identifier expressed in different bases: hex A451DB, octal 51050733, decimal 10,768,859.
What flights does A451DB operate?
Mode-S A451DB has broadcast 20 distinct callsigns, including DAL1659, DAL1181, DAL994, DAL2016, DAL550.