Apparatus

Try JFK, AAL1290, BAW, or N225AN.

sensors Mode-S transponder

A44548

ICAO 24-bit transponder address · allocated to United States

Currently assigned to N3742C · BOEING 737-800 · operated by DELTA AIR LINES INC

Hex
A44548
Octal
51042510
Decimal
10,765,640
Country
US
Tail
N3742C
Type
B738
Broadcasting now · callsign DAL2260 · 30,800 ft
Flights observed
421
Distinct callsigns
20
Country
US
Last broadcast
28m ago

Current position

A44548 is currently broadcasting. Map zoomed to live position.

Country allocation

The ICAO 24-bit address A44548 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
DAL2533 Delta Air Lines 11 2026-06-03
DAL716 Delta Air Lines 7 2026-05-16
DAL2419 - 7 2026-07-11
DAL1421 - 7 2026-06-25
DAL1696 - 6 2026-06-26
DAL1279 Delta Air Lines 6 2026-05-03
DAL2844 Delta Air Lines 5 2026-06-03
DAL2082 Delta Air Lines 5 2026-05-23
DAL922 Delta Air Lines 4 2026-06-05
DAL909 Delta Air Lines 4 2026-04-29
DAL2993 - 4 2026-06-22
DAL2922 - 4 2026-07-03
DAL2892 Delta Air Lines 4 2026-04-17
DAL2830 - 4 2026-07-03
DAL2515 - 4 2026-06-20
DAL2477 Delta Air Lines 4 2026-06-21
DAL2240 Delta Air Lines 4 2026-06-04
DAL2120 - 4 2026-06-27
DAL1841 Delta Air Lines 4 2026-06-18
DAL1319 Delta Air Lines 4 2026-05-04

Recent flights last 50

DateFlightRouteTakeoffLandingDuration
2026-07-14 DAL2260 - Jul 14, 02:30 UTCJul 14, 04:00 UTC1h 30m
2026-07-13 DAL2260 AUS → LAS Jul 13, 22:40 UTCJul 14, 01:15 UTC2h 35m
2026-07-13 DAL2259 MCO → AUS Jul 13, 16:45 UTCJul 13, 19:20 UTC2h 35m
2026-07-13 DAL2259 AUS → MCO Jul 13, 13:10 UTCJul 13, 15:20 UTC2h 10m
2026-07-13 DAL848 SEA → AUS Jul 13, 01:15 UTCJul 13, 04:50 UTC3h 35m
2026-07-12 DAL2606 - Jul 12, 21:10 UTCJul 12, 23:05 UTC1h 55m
2026-07-12 DAL2606 LAX → SEA Jul 12, 21:10 UTCJul 12, 23:05 UTC1h 55m
2026-07-12 DAL2769 - Jul 12, 17:30 UTCJul 12, 19:55 UTC2h 25m
2026-07-12 DAL2874 - Jul 12, 14:05 UTCJul 12, 15:40 UTC1h 35m
2026-07-12 DAL2874 SLC → SEA Jul 12, 14:03 UTCJul 12, 15:36 UTC1h 33m
2026-07-12 DAL1590 LAS → SLC Jul 12, 03:10 UTCJul 12, 04:05 UTC55m
2026-07-11 DAL2955 SEA → LAS Jul 11, 23:50 UTCJul 12, 02:01 UTC2h 10m
2026-07-11 DAL2955 SEA → LAS Jul 11, 23:50 UTCJul 12, 02:01 UTC2h 11m
2026-07-11 DAL2419 PHX → SEA Jul 11, 19:20 UTCJul 11, 21:50 UTC2h 30m
2026-07-11 DAL2419 SEA → PHX Jul 11, 15:40 UTCJul 11, 18:05 UTC2h 25m
2026-07-09 DAL2817 SLC → SEA Jul 9, 21:30 UTCJul 9, 23:05 UTC1h 35m
2026-07-09 DAL678 - Jul 9, 16:35 UTCJul 9, 19:45 UTC3h 10m
2026-07-09 DAL3160 ATL → CVG Jul 9, 14:05 UTCJul 9, 15:00 UTC55m
2026-07-09 DAL3085 - Jul 9, 11:10 UTCJul 9, 11:55 UTC45m
2026-07-09 DAL3097 - Jul 9, 03:35 UTCJul 9, 04:15 UTC40m
2026-07-09 DAL3097 ATL → VPS Jul 9, 03:34 UTCJul 9, 04:19 UTC45m
2026-07-07 DAL880 - Jul 7, 22:20 UTCJul 7, 23:40 UTC1h 20m
2026-07-07 DAL880 ATL → CLE Jul 7, 19:45 UTCJul 7, 20:55 UTC1h 10m
2026-07-07 DAL593 - Jul 7, 14:50 UTCJul 7, 17:35 UTC2h 45m
2026-07-07 DAL593 MEX → ATL Jul 7, 14:47 UTCJul 7, 17:35 UTC2h 48m
2026-07-06 DAL585 ATL → MEX Jul 6, 22:35 UTCJul 7, 01:35 UTC3h 0m
2026-07-06 DAL2020 - Jul 6, 18:35 UTCJul 6, 20:15 UTC1h 40m
2026-07-06 DAL2020 ATL → OKC Jul 6, 15:15 UTCJul 6, 17:00 UTC1h 45m
2026-07-06 DAL1619 - Jul 6, 13:00 UTCJul 6, 13:30 UTC30m
2026-07-06 DAL1619 GSP → ATL Jul 6, 12:57 UTCJul 6, 13:26 UTC29m
2026-07-06 DAL2319 - Jul 6, 00:50 UTCJul 6, 01:20 UTC30m
2026-07-05 DAL3138 GNV → ATL Jul 5, 20:50 UTCJul 5, 22:10 UTC1h 20m
2026-07-05 DAL2910 MSP → IND Jul 5, 18:10 UTCJul 5, 19:20 UTC1h 10m
2026-07-05 DAL2987 - Jul 5, 13:55 UTCJul 5, 16:35 UTC2h 40m
2026-07-05 DAL1607 - Jul 5, 03:30 UTCJul 5, 03:55 UTC25m
2026-07-04 DAL736 MSY → SLC Jul 4, 21:35 UTCJul 5, 00:45 UTC3h 10m
2026-07-04 DAL1112 ATL → MDW Jul 4, 16:25 UTCJul 4, 19:40 UTC3h 15m
2026-07-04 DAL2534 - Jul 4, 12:25 UTCJul 4, 15:00 UTC2h 35m
2026-07-04 DAL2534 SAT → LAX Jul 4, 12:20 UTCJul 4, 14:58 UTC2h 38m
2026-07-04 DAL2686 - Jul 4, 04:00 UTCJul 4, 04:20 UTC20m
2026-07-04 DAL2686 - Jul 4, 02:00 UTCJul 4, 03:05 UTC1h 5m
2026-07-03 DAL2830 - Jul 3, 22:30 UTCJul 4, 00:00 UTC1h 30m
2026-07-03 DAL2830 SEA → LAX Jul 3, 22:26 UTCJul 4, 00:29 UTC2h 3m
2026-07-03 DAL2922 LAS → SEA Jul 3, 18:35 UTCJul 3, 20:50 UTC2h 15m
2026-07-03 DAL2922 SEA → LAS Jul 3, 14:55 UTCJul 3, 16:45 UTC1h 50m
2026-07-02 DAL2092 - Jul 2, 22:50 UTCJul 3, 04:10 UTC5h 20m
2026-07-02 DAL1114 - Jul 2, 16:45 UTCJul 2, 21:30 UTC4h 45m
2026-07-02 DAL2442 PHX → SEA Jul 2, 00:55 UTCJul 2, 03:35 UTC2h 40m
2026-07-02 DAL2442 PHX → SEA Jul 2, 00:54 UTCJul 2, 03:35 UTC2h 41m
2026-07-01 DAL2442 SEA → PHX Jul 1, 21:10 UTCJul 1, 23:30 UTC2h 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 N3742C page for operator, model, and routing details .

Mode-S A44548 frequently asked

What is Mode-S code A44548?
A44548 is an ICAO 24-bit transponder address. Allocated to United States. Assigned to N3742C.
Where is Mode-S A44548 registered?
Mode-S code A44548 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 A44548 broadcasting right now?
Yes. Mode-S A44548 is currently airborne.
Hex, octal, and decimal Mode-S codes: what's the difference?
The same 24-bit identifier expressed in different bases: hex A44548, octal 51042510, decimal 10,765,640.
What flights does A44548 operate?
Mode-S A44548 has broadcast 20 distinct callsigns, including DAL2533, DAL716, DAL2419, DAL1421, DAL1696.