Apparatus

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sensors Mode-S transponder

A45F59

ICAO 24-bit transponder address · allocated to United States

Currently assigned to N381DN · BOEING 737-800 · operated by DELTA AIR LINES INC

Hex
A45F59
Octal
51057531
Decimal
10,772,313
Country
US
Tail
N381DN
Type
B738
No current signal · last broadcast 2h ago
Flights observed
424
Distinct callsigns
20
Country
US
Last broadcast
2h ago

Last known position

Most recent position reported by Mode-S A45F59.

Country allocation

The ICAO 24-bit address A45F59 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
DAL379 Delta Air Lines 9 2026-04-17
DAL2508 - 9 2026-07-13
DAL2120 - 9 2026-07-10
DAL986 - 8 2026-07-10
DAL2880 - 7 2026-07-09
DAL2442 - 7 2026-07-01
DAL922 - 6 2026-07-05
DAL2980 - 6 2026-07-09
DAL2259 - 6 2026-07-11
DAL2230 Delta Air Lines 6 2026-06-06
DAL2226 - 6 2026-06-15
DAL1715 - 6 2026-07-08
DAL1696 - 6 2026-07-09
DAL1016 - 6 2026-07-12
DAL2947 - 5 2026-07-10
DAL2457 - 5 2026-07-10
DAL2449 Delta Air Lines 5 2026-05-26
DAL2444 Delta Air Lines 5 2026-06-09
DAL2260 - 5 2026-07-12
DAL2194 Delta Air Lines 5 2026-04-16

Recent flights last 50

DateFlightRouteTakeoffLandingDuration
2026-07-14 DAL2613 - Jul 14, 02:40 UTCJul 14, 04:15 UTC1h 35m
2026-07-13 DAL2613 SEA → SAN Jul 13, 22:45 UTCJul 14, 01:20 UTC2h 35m
2026-07-13 DAL2508 SAN → SEA Jul 13, 18:47 UTCJul 13, 20:51 UTC2h 4m
2026-07-13 DAL2508 - Jul 13, 18:50 UTCJul 13, 20:50 UTC2h 0m
2026-07-13 DAL2508 SEA → SAN Jul 13, 14:30 UTCJul 13, 17:05 UTC2h 35m
2026-07-13 DAL2998 SLC → SEA Jul 13, 05:31 UTCJul 13, 07:01 UTC1h 30m
2026-07-13 DAL2149 - Jul 13, 00:55 UTCJul 13, 04:00 UTC3h 5m
2026-07-12 DAL2149 SLC → CVG Jul 12, 20:40 UTCJul 12, 23:45 UTC3h 5m
2026-07-12 DAL1016 SEA → SLC Jul 12, 16:50 UTCJul 12, 18:35 UTC1h 45m
2026-07-12 DAL1016 SEA → SLC Jul 12, 16:50 UTCJul 12, 18:25 UTC1h 35m
2026-07-12 DAL780 AUS → SEA Jul 12, 11:35 UTCJul 12, 15:15 UTC3h 40m
2026-07-12 DAL2260 LAS → AUS Jul 12, 00:15 UTCJul 12, 02:40 UTC2h 25m
2026-07-11 DAL2260 AUS → LAS Jul 11, 20:35 UTCJul 11, 22:55 UTC2h 20m
2026-07-11 DAL2259 - Jul 11, 16:55 UTCJul 11, 19:05 UTC2h 10m
2026-07-11 DAL2259 - Jul 11, 13:15 UTCJul 11, 15:40 UTC2h 25m
2026-07-11 DAL692 - Jul 11, 01:35 UTCJul 11, 04:10 UTC2h 35m
2026-07-11 DAL692 LAX → AUS Jul 11, 01:32 UTCJul 11, 04:11 UTC2h 39m
2026-07-10 DAL986 - Jul 10, 21:40 UTCJul 11, 00:10 UTC2h 30m
2026-07-10 DAL986 LAX → AUS Jul 10, 17:15 UTCJul 10, 19:55 UTC2h 40m
2026-07-10 DAL2947 PDX → LAX Jul 10, 13:40 UTCJul 10, 15:45 UTC2h 5m
2026-07-10 DAL2457 - Jul 10, 04:00 UTCJul 10, 05:50 UTC1h 50m
2026-07-10 DAL2120 LAS → LAX Jul 10, 02:05 UTCJul 10, 02:50 UTC45m
2026-07-10 DAL2120 - Jul 10, 00:10 UTCJul 10, 00:50 UTC40m
2026-07-09 DAL1696 LAS → LAX Jul 9, 22:05 UTCJul 9, 22:55 UTC50m
2026-07-09 DAL2880 SEA → LAS Jul 9, 18:25 UTCJul 9, 20:20 UTC1h 55m
2026-07-09 DAL2980 - Jul 9, 14:25 UTCJul 9, 16:35 UTC2h 10m
2026-07-09 DAL2267 - Jul 9, 00:40 UTCJul 9, 01:35 UTC55m
2026-07-08 DAL2267 - Jul 8, 22:30 UTCJul 8, 23:25 UTC55m
2026-07-08 DAL1715 SFO → LAX Jul 8, 19:00 UTCJul 8, 20:00 UTC1h 0m
2026-07-08 DAL1715 SFO → LAX Jul 8, 19:00 UTCJul 8, 19:52 UTC52m
2026-07-08 DAL1715 LAX → SFO Jul 8, 16:35 UTCJul 8, 17:35 UTC1h 0m
2026-07-08 DAL2534 - Jul 8, 12:30 UTCJul 8, 15:00 UTC2h 30m
2026-07-08 DAL2686 - Jul 8, 02:10 UTCJul 8, 04:35 UTC2h 25m
2026-07-07 DAL2830 SEA → LAX Jul 7, 22:30 UTCJul 8, 00:50 UTC2h 20m
2026-07-07 DAL2922 LAS → SEA Jul 7, 18:10 UTCJul 7, 20:10 UTC2h 0m
2026-07-07 DAL2922 SEA → LAS Jul 7, 14:45 UTCJul 7, 16:50 UTC2h 5m
2026-07-07 DAL2613 - Jul 7, 02:25 UTCJul 7, 04:40 UTC2h 15m
2026-07-06 DAL2613 - Jul 6, 22:40 UTCJul 7, 01:10 UTC2h 30m
2026-07-06 DAL2508 SAN → SEA Jul 6, 18:10 UTCJul 6, 20:25 UTC2h 15m
2026-07-06 DAL2508 SAN → SEA Jul 6, 18:08 UTCJul 6, 20:21 UTC2h 13m
2026-07-06 DAL2508 SEA → SAN Jul 6, 14:30 UTCJul 6, 16:55 UTC2h 25m
2026-07-05 DAL922 - Jul 5, 23:25 UTCJul 6, 02:30 UTC3h 5m
2026-07-05 DAL922 ANC → SEA Jul 5, 23:23 UTCJul 6, 02:25 UTC3h 2m
2026-07-05 DAL922 SEA → ANC Jul 5, 19:10 UTCJul 5, 22:20 UTC3h 10m
2026-07-05 DAL2041 MSP → IND Jul 5, 12:20 UTCJul 5, 16:10 UTC3h 50m
2026-07-05 DAL1305 - Jul 5, 00:30 UTCJul 5, 01:05 UTC35m
2026-07-04 DAL1305 LGA → GRR Jul 4, 19:05 UTCJul 4, 21:40 UTC2h 35m
2026-07-04 DAL1305 LGA → GRR Jul 4, 19:05 UTCJul 4, 22:03 UTC2h 58m
2026-07-04 DAL398 DEN → LGA Jul 4, 13:36 UTCJul 4, 16:55 UTC3h 19m
2026-07-04 DAL398 DEN → LGA Jul 4, 13:40 UTCJul 4, 16:55 UTC3h 15m

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 N381DN page for operator, model, and routing details .

Mode-S A45F59 frequently asked

What is Mode-S code A45F59?
A45F59 is an ICAO 24-bit transponder address. Allocated to United States. Assigned to N381DN.
Where is Mode-S A45F59 registered?
Mode-S code A45F59 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 A45F59 broadcasting right now?
No active broadcast right now. Last signal was 2h ago.
Hex, octal, and decimal Mode-S codes: what's the difference?
The same 24-bit identifier expressed in different bases: hex A45F59, octal 51057531, decimal 10,772,313.
What flights does A45F59 operate?
Mode-S A45F59 has broadcast 20 distinct callsigns, including DAL379, DAL2508, DAL2120, DAL986, DAL2880.