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
No current signal · last broadcast Jul 26, 22:00 UTC
Flights observed
471
Distinct callsigns
20
Country
US
Last broadcast
Jul 26, 22:00 UTC

Last known position

Most recent position reported by Mode-S A44548.

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
DAL2419 - 9 2026-07-18
DAL716 Delta Air Lines 7 2026-05-16
DAL1421 - 7 2026-06-25
DAL2922 - 6 2026-07-16
DAL1696 - 6 2026-06-26
DAL1279 Delta Air Lines 6 2026-05-03
DAL2844 Delta Air Lines 5 2026-06-03
DAL2830 - 5 2026-07-17
DAL2267 - 5 2026-07-18
DAL2082 Delta Air Lines 5 2026-05-23
DAL1715 - 5 2026-07-17
DAL1714 - 5 2026-07-14
DAL922 Delta Air Lines 4 2026-06-05
DAL909 Delta Air Lines 4 2026-04-29
DAL379 Delta Air Lines 4 2026-07-26
DAL2993 - 4 2026-06-22
DAL2955 Delta Air Lines 4 2026-07-19
DAL2892 Delta Air Lines 4 2026-04-17
DAL2515 - 4 2026-06-20

Recent flights last 50

DateFlightRouteTakeoffLandingDuration
2026-07-26 DAL846 LGA → ATL Jul 26, 19:25 UTCJul 26, 22:00 UTC2h 35m
2026-07-26 DAL379 ATL → LGA Jul 26, 15:25 UTCJul 26, 17:50 UTC2h 25m
2026-07-26 DAL379 ATL → LGA Jul 26, 15:21 UTCJul 26, 17:39 UTC2h 18m
2026-07-26 DAL379 ATL → LGA Jul 26, 11:45 UTCJul 26, 14:10 UTC2h 25m
2026-07-25 DAL2412 LAX → SFO Jul 25, 17:55 UTCJul 25, 20:10 UTC2h 15m
2026-07-25 DAL2412 LAX → SFO Jul 25, 13:55 UTCJul 25, 16:35 UTC2h 40m
2026-07-25 DAL2770 LAX → PDX Jul 25, 11:10 UTCJul 25, 12:00 UTC50m
2026-07-24 DAL2373 MIA → LGA Jul 24, 14:50 UTCJul 24, 17:30 UTC2h 40m
2026-07-24 DAL1600 CVG → RSW Jul 24, 11:40 UTCJul 24, 13:30 UTC1h 50m
2026-07-24 DAL1600 CVG → RSW Jul 24, 11:35 UTCJul 24, 13:28 UTC1h 53m
2026-07-24 DAL661 ATL → BOS Jul 24, 00:50 UTCJul 24, 02:55 UTC2h 5m
2026-07-23 DAL661 ATL → BOS Jul 23, 21:40 UTCJul 23, 23:40 UTC2h 0m
2026-07-23 DAL2774 IAH → DTW Jul 23, 18:15 UTCJul 23, 20:15 UTC2h 0m
2026-07-23 DAL1401 BOS → FLL Jul 23, 13:15 UTCJul 23, 16:05 UTC2h 50m
2026-07-22 DAL9960 JFK → ATL Jul 22, 23:00 UTCJul 23, 00:30 UTC1h 30m
2026-07-22 DAL1603 PBI → ATL Jul 22, 19:30 UTCJul 22, 21:25 UTC1h 55m
2026-07-22 DAL1603 PBI → ATL Jul 22, 19:26 UTCJul 22, 21:21 UTC1h 55m
2026-07-22 DAL2474 BOS → RSW Jul 22, 15:10 UTCJul 22, 18:25 UTC3h 15m
2026-07-22 DAL2801 LGA → BOS Jul 22, 04:45 UTCJul 22, 05:25 UTC40m
2026-07-21 DAL2336 - Jul 21, 23:55 UTCJul 22, 01:30 UTC1h 35m
2026-07-21 DAL2336 ORD → LGA Jul 21, 23:54 UTCJul 22, 01:30 UTC1h 36m
2026-07-21 DAL2055 - Jul 21, 14:50 UTCJul 21, 18:00 UTC3h 10m
2026-07-21 DAL2613 ORD → LGA Jul 21, 02:25 UTCJul 21, 04:50 UTC2h 25m
2026-07-20 DAL2613 ORD → LGA Jul 20, 22:30 UTCJul 21, 01:00 UTC2h 30m
2026-07-20 DAL2508 - Jul 20, 18:35 UTCJul 20, 20:45 UTC2h 10m
2026-07-20 DAL2508 SEA → SAN Jul 20, 14:30 UTCJul 20, 16:55 UTC2h 25m
2026-07-20 DAL2998 TPA → BOS Jul 20, 05:40 UTCJul 20, 07:15 UTC1h 35m
2026-07-20 DAL2998 TPA → BOS Jul 20, 05:38 UTCJul 20, 07:15 UTC1h 37m
2026-07-20 DAL2149 - Jul 20, 00:10 UTCJul 20, 03:25 UTC3h 15m
2026-07-19 DAL2149 SLC → CVG Jul 19, 19:50 UTCJul 19, 22:50 UTC3h 0m
2026-07-19 DAL1447 PHX → SLC Jul 19, 16:55 UTCJul 19, 18:05 UTC1h 10m
2026-07-19 DAL1447 SLC → PHX Jul 19, 14:15 UTCJul 19, 15:30 UTC1h 15m
2026-07-19 DAL1590 LAS → SLC Jul 19, 03:45 UTCJul 19, 04:40 UTC55m
2026-07-19 DAL2955 JFK → PBI Jul 19, 00:35 UTCJul 19, 02:40 UTC2h 5m
2026-07-18 DAL2419 PHX → SEA Jul 18, 19:35 UTCJul 18, 22:00 UTC2h 25m
2026-07-18 DAL2419 SEA → PHX Jul 18, 15:40 UTCJul 18, 18:30 UTC2h 50m
2026-07-18 DAL1551 - Jul 18, 02:40 UTCJul 18, 04:35 UTC1h 56m
2026-07-18 DAL1551 LAX → SEA Jul 18, 02:36 UTCJul 18, 04:31 UTC1h 55m
2026-07-18 DAL2267 - Jul 18, 00:19 UTCJul 18, 01:25 UTC1h 5m
2026-07-17 DAL2267 - Jul 17, 22:20 UTCJul 17, 23:10 UTC50m
2026-07-17 DAL1715 - Jul 17, 19:40 UTCJul 17, 20:40 UTC1h 0m
2026-07-17 DAL1715 - Jul 17, 17:30 UTCJul 17, 18:29 UTC1h 0m
2026-07-17 DAL2534 - Jul 17, 12:30 UTCJul 17, 15:05 UTC2h 35m
2026-07-17 DAL2686 - Jul 17, 04:49 UTCJul 17, 07:25 UTC2h 35m
2026-07-17 DAL2830 SEA → LAX Jul 17, 01:09 UTCJul 17, 03:34 UTC2h 25m
2026-07-16 DAL2922 LAS → SEA Jul 16, 18:29 UTCJul 16, 20:39 UTC2h 10m
2026-07-16 DAL2922 SEA → LAS Jul 16, 15:00 UTCJul 16, 17:10 UTC2h 10m
2026-07-14 DAL1714 - Jul 14, 17:00 UTCJul 14, 19:00 UTC2h 0m
2026-07-14 DAL1714 LAX → SEA Jul 14, 16:57 UTCJul 14, 18:58 UTC2h 1m
2026-07-14 DAL306 - Jul 14, 12:50 UTCJul 14, 15:30 UTC2h 40m

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?
No active broadcast right now. Last signal was Jul 26, 22:00 UTC.
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, DAL2419, DAL716, DAL1421, DAL2922.