Apparatus

Try JFK, AAL1290, BAW, or N225AN.

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 Jul 26, 21:30 UTC
Flights observed
487
Distinct callsigns
20
Country
US
Last broadcast
Jul 26, 21:30 UTC

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
DAL2508 - 12 2026-07-19
DAL2442 - 12 2026-07-18
DAL1696 Delta Air Lines 11 2026-07-26
DAL379 Delta Air Lines 9 2026-04-17
DAL2922 - 9 2026-07-20
DAL2120 - 9 2026-07-10
DAL1715 - 9 2026-07-21
DAL986 - 8 2026-07-10
DAL2880 - 7 2026-07-09
DAL922 - 6 2026-07-05
DAL2980 - 6 2026-07-09
DAL2947 - 6 2026-07-17
DAL2686 Delta Air Lines 6 2026-07-21
DAL2613 Delta Air Lines 6 2026-07-20
DAL2457 - 6 2026-07-17
DAL2259 - 6 2026-07-11
DAL2230 Delta Air Lines 6 2026-06-06
DAL2226 - 6 2026-06-15
DAL1016 - 6 2026-07-12
DAL2830 Delta Air Lines 5 2026-07-20

Recent flights last 50

DateFlightRouteTakeoffLandingDuration
2026-07-26 DAL1696 GSP → DTW Jul 26, 20:45 UTCJul 26, 21:30 UTC45m
2026-07-26 DAL1696 GSP → DTW Jul 26, 18:15 UTCJul 26, 19:00 UTC45m
2026-07-26 DAL1556 RSW → LGA Jul 26, 12:50 UTCJul 26, 16:25 UTC3h 35m
2026-07-26 DAL1634 COS → ATL Jul 26, 00:25 UTCJul 26, 04:00 UTC3h 35m
2026-07-25 DAL2212 CLT → MSP Jul 25, 21:25 UTCJul 25, 22:35 UTC1h 10m
2026-07-25 DAL2212 CLT → MSP Jul 25, 18:55 UTCJul 25, 19:55 UTC1h 0m
2026-07-25 DAL1095 LAX → JFK Jul 25, 16:08 UTCJul 25, 17:28 UTC1h 20m
2026-07-25 DAL1095 LAX → JFK Jul 25, 16:10 UTCJul 25, 17:40 UTC1h 30m
2026-07-25 DAL2897 MSP → PHL Jul 25, 12:20 UTCJul 25, 14:30 UTC2h 10m
2026-07-25 DAL2993 DTW → FLL Jul 25, 03:40 UTCJul 25, 05:40 UTC2h 0m
2026-07-25 DAL2993 DTW → FLL Jul 25, 03:36 UTCJul 25, 05:28 UTC1h 52m
2026-07-24 DAL1838 PVR → SLC Jul 24, 17:05 UTCJul 25, 00:45 UTC7h 40m
2026-07-24 DAL2290 AWM → SLC Jul 24, 12:25 UTCJul 24, 15:15 UTC2h 50m
2026-07-24 DAL1080 DTW → LGA Jul 24, 05:30 UTCJul 24, 08:50 UTC3h 20m
2026-07-24 DAL2298 ATL → PHL Jul 24, 00:05 UTCJul 24, 03:50 UTC3h 45m
2026-07-23 DAL2368 ATL → MSY Jul 23, 18:45 UTCJul 23, 22:15 UTC3h 30m
2026-07-23 DAL2085 ATL → BOS Jul 23, 13:15 UTCJul 23, 16:35 UTC3h 20m
2026-07-22 DAL2154 CVG → ATL Jul 22, 23:10 UTCJul 23, 02:40 UTC3h 30m
2026-07-22 DAL1696 GSP → DTW Jul 22, 20:30 UTCJul 22, 21:10 UTC40m
2026-07-22 DAL1696 GSP → DTW Jul 22, 20:27 UTCJul 22, 21:06 UTC39m
2026-07-22 DAL1696 GSP → DTW Jul 22, 18:25 UTCJul 22, 19:10 UTC45m
2026-07-22 DAL2085 ATL → BOS Jul 22, 13:20 UTCJul 22, 16:40 UTC3h 20m
2026-07-21 DAL2154 CVG → ATL Jul 21, 23:10 UTCJul 22, 02:45 UTC3h 35m
2026-07-21 DAL1715 SFO → LAX Jul 21, 20:04 UTCJul 21, 20:59 UTC55m
2026-07-21 DAL1715 SFO → LAX Jul 21, 20:05 UTCJul 21, 21:00 UTC55m
2026-07-21 DAL1715 - Jul 21, 17:30 UTCJul 21, 18:20 UTC50m
2026-07-21 DAL2534 SLC → PDX Jul 21, 12:30 UTCJul 21, 15:05 UTC2h 35m
2026-07-21 DAL2686 MSP → BWI Jul 21, 02:15 UTCJul 21, 05:10 UTC2h 55m
2026-07-21 DAL2686 MSP → BWI Jul 21, 02:10 UTCJul 21, 04:58 UTC2h 48m
2026-07-20 DAL2830 MSP → DEN Jul 20, 22:45 UTCJul 21, 01:05 UTC2h 19m
2026-07-20 DAL2922 LAS → SEA Jul 20, 18:55 UTCJul 20, 20:50 UTC1h 55m
2026-07-20 DAL2922 SEA → LAS Jul 20, 14:45 UTCJul 20, 16:55 UTC2h 10m
2026-07-20 DAL2613 ORD → LGA Jul 20, 02:20 UTCJul 20, 04:40 UTC2h 20m
2026-07-19 DAL2613 ORD → LGA Jul 19, 22:25 UTCJul 20, 00:50 UTC2h 25m
2026-07-19 DAL2508 SAN → SEA Jul 19, 18:16 UTCJul 19, 20:34 UTC2h 18m
2026-07-19 DAL2508 - Jul 19, 18:20 UTCJul 19, 20:35 UTC2h 15m
2026-07-19 DAL2508 SEA → SAN Jul 19, 14:30 UTCJul 19, 17:00 UTC2h 30m
2026-07-19 DAL2956 LAS → SEA Jul 19, 02:45 UTCJul 19, 04:45 UTC2h 0m
2026-07-18 DAL1690 SLC → LAS Jul 18, 23:55 UTCJul 19, 00:50 UTC55m
2026-07-18 DAL736 - Jul 18, 18:45 UTCJul 18, 21:50 UTC3h 5m
2026-07-18 DAL1112 - Jul 18, 13:35 UTCJul 18, 17:10 UTC3h 35m
2026-07-18 DAL2512 SEA → LAX Jul 18, 05:08 UTCJul 18, 07:22 UTC2h 14m
2026-07-18 DAL2512 SEA → LAX Jul 18, 05:10 UTCJul 18, 07:30 UTC2h 20m
2026-07-18 DAL2442 - Jul 18, 01:00 UTCJul 18, 03:30 UTC2h 31m
2026-07-17 DAL2442 SEA → PHX Jul 17, 20:55 UTCJul 17, 23:45 UTC2h 50m
2026-07-17 DAL1714 - Jul 17, 17:15 UTCJul 17, 19:09 UTC1h 55m
2026-07-17 DAL1714 LAX → SEA Jul 17, 17:10 UTCJul 17, 19:10 UTC2h 0m
2026-07-17 DAL2947 PDX → LAX Jul 17, 13:40 UTCJul 17, 15:49 UTC2h 10m
2026-07-17 DAL2457 - Jul 17, 03:10 UTCJul 17, 04:59 UTC1h 50m
2026-07-16 DAL1793 - Jul 16, 18:44 UTCJul 17, 01:15 UTC6h 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 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 Jul 26, 21:30 UTC.
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 DAL2508, DAL2442, DAL1696, DAL379, DAL2922.