Apparatus

Try JFK, AAL1290, BAW, or N225AN.

sensors Mode-S transponder

A445B0

ICAO 24-bit transponder address · allocated to United States

Currently assigned to N3745B · BOEING 737-800 · operated by DELTA AIR LINES INC

Hex
A445B0
Octal
51042660
Decimal
10,765,744
Country
US
Tail
N3745B
Type
B738
No current signal · last broadcast Jul 26, 22:00 UTC
Flights observed
461
Distinct callsigns
20
Country
US
Last broadcast
Jul 26, 22:00 UTC

Last known position

Most recent position reported by Mode-S A445B0.

Country allocation

The ICAO 24-bit address A445B0 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
DAL2419 Delta Air Lines 8 2026-05-09
DAL2259 Delta Air Lines 8 2026-07-25
DAL1399 - 8 2026-07-06
DAL873 - 7 2026-06-23
DAL1188 Delta Air Lines 7 2026-05-26
DAL687 Delta Air Lines 6 2026-04-15
DAL2880 Delta Air Lines 6 2026-07-18
DAL2444 Delta Air Lines 6 2026-05-20
DAL2260 Delta Air Lines 6 2026-07-26
DAL1595 - 6 2026-07-16
DAL1016 Delta Air Lines 6 2026-07-26
DAL2956 Delta Air Lines 5 2026-07-21
DAL2782 - 5 2026-07-05
DAL2698 Delta Air Lines 5 2026-07-19
DAL2633 - 5 2026-07-15
DAL2533 Delta Air Lines 5 2026-05-21
DAL2515 Delta Air Lines 5 2026-07-26
DAL2108 Delta Air Lines 5 2026-05-22
DAL1714 Delta Air Lines 5 2026-04-26
DAL1628 Delta Air Lines 5 2026-07-22

Recent flights last 50

DateFlightRouteTakeoffLandingDuration
2026-07-26 DAL2515 BOS → BNA Jul 26, 20:05 UTCJul 26, 22:00 UTC1h 55m
2026-07-26 DAL1016 ATL → MDW Jul 26, 16:50 UTCJul 26, 18:23 UTC1h 33m
2026-07-26 DAL1016 ATL → MDW Jul 26, 16:50 UTCJul 26, 18:25 UTC1h 35m
2026-07-26 DAL780 AUS → SEA Jul 26, 11:20 UTCJul 26, 15:05 UTC3h 45m
2026-07-26 DAL2260 CVG → FLL Jul 26, 01:05 UTCJul 26, 03:30 UTC2h 25m
2026-07-25 DAL2260 CVG → FLL Jul 25, 21:40 UTCJul 25, 23:55 UTC2h 15m
2026-07-25 DAL2259 JFK → JAX Jul 25, 17:35 UTCJul 25, 19:35 UTC2h 0m
2026-07-25 DAL2259 JFK → JAX Jul 25, 17:31 UTCJul 25, 19:36 UTC2h 5m
2026-07-25 DAL2259 JFK → JAX Jul 25, 13:50 UTCJul 25, 16:15 UTC2h 25m
2026-07-25 DAL2260 CVG → FLL Jul 25, 01:15 UTCJul 25, 03:40 UTC2h 25m
2026-07-24 DAL2260 CVG → FLL Jul 24, 21:40 UTCJul 25, 00:00 UTC2h 20m
2026-07-24 DAL2259 JFK → JAX Jul 24, 16:55 UTCJul 24, 19:00 UTC2h 5m
2026-07-24 DAL2259 JFK → JAX Jul 24, 13:20 UTCJul 24, 15:40 UTC2h 20m
2026-07-24 DAL692 LAX → AUS Jul 24, 01:40 UTCJul 24, 04:20 UTC2h 40m
2026-07-23 DAL986 ATL → SYR Jul 23, 21:35 UTCJul 24, 00:15 UTC2h 40m
2026-07-23 DAL986 ATL → SYR Jul 23, 17:20 UTCJul 23, 19:55 UTC2h 35m
2026-07-23 DAL2947 LAX → PDX Jul 23, 13:45 UTCJul 23, 15:50 UTC2h 5m
2026-07-23 DAL2457 JFK → FLL Jul 23, 03:25 UTCJul 23, 05:15 UTC1h 50m
2026-07-23 DAL1779 PVR → LAX Jul 23, 00:00 UTCJul 23, 01:25 UTC1h 25m
2026-07-22 DAL1779 PVR → LAX Jul 22, 22:54 UTCJul 23, 01:21 UTC2h 27m
2026-07-22 DAL1793 ATL → PVD Jul 22, 18:35 UTCJul 22, 19:55 UTC1h 20m
2026-07-22 DAL1793 ATL → PVD Jul 22, 18:32 UTCJul 22, 21:13 UTC2h 41m
2026-07-22 DAL1628 ATL → SFO Jul 22, 14:30 UTCJul 22, 16:45 UTC2h 15m
2026-07-22 DAL1628 ATL → SFO Jul 22, 14:27 UTCJul 22, 16:37 UTC2h 10m
2026-07-22 DAL1551 ATL → PHL Jul 22, 02:45 UTCJul 22, 04:55 UTC2h 10m
2026-07-22 DAL2267 SFO → LAX Jul 22, 00:35 UTCJul 22, 01:30 UTC55m
2026-07-21 DAL2267 SFO → LAX Jul 21, 21:55 UTCJul 21, 23:00 UTC1h 5m
2026-07-21 DAL1628 ATL → SFO Jul 21, 14:40 UTCJul 21, 16:55 UTC2h 15m
2026-07-21 DAL2956 ATL → IND Jul 21, 03:20 UTCJul 21, 05:15 UTC1h 55m
2026-07-21 DAL1690 DTW → IAH Jul 21, 01:05 UTCJul 21, 02:00 UTC55m
2026-07-20 DAL849 - Jul 20, 22:20 UTCJul 20, 23:45 UTC1h 25m
2026-07-20 DAL902 BOS → DEN Jul 20, 18:35 UTCJul 20, 20:10 UTC1h 35m
2026-07-20 DAL2897 - Jul 20, 12:20 UTCJul 20, 14:20 UTC2h 0m
2026-07-20 DAL2993 DTW → FLL Jul 20, 03:05 UTCJul 20, 05:00 UTC1h 55m
2026-07-20 DAL1738 JFK → PBI Jul 20, 00:15 UTCJul 20, 01:30 UTC1h 15m
2026-07-19 DAL1738 JFK → PBI Jul 19, 21:35 UTCJul 19, 22:55 UTC1h 20m
2026-07-19 DAL1265 SEA → SLC Jul 19, 18:25 UTCJul 19, 20:05 UTC1h 40m
2026-07-19 DAL1570 PHX → SEA Jul 19, 14:05 UTCJul 19, 16:30 UTC2h 25m
2026-07-19 DAL2698 MIA → BOS Jul 19, 01:35 UTCJul 19, 04:10 UTC2h 35m
2026-07-18 DAL2880 ATL → PHL Jul 18, 21:50 UTCJul 18, 23:45 UTC1h 55m
2026-07-18 DAL2880 ATL → PHL Jul 18, 21:50 UTCJul 18, 23:53 UTC2h 3m
2026-07-18 DAL2880 ATL → PHL Jul 18, 18:30 UTCJul 18, 20:35 UTC2h 5m
2026-07-18 DAL2980 - Jul 18, 14:25 UTCJul 18, 16:20 UTC1h 55m
2026-07-18 DAL2980 LAX → SEA Jul 18, 14:21 UTCJul 18, 16:23 UTC2h 2m
2026-07-17 DAL1779 - Jul 17, 18:40 UTCJul 18, 01:34 UTC6h 55m
2026-07-17 DAL1628 SEA → LAX Jul 17, 14:40 UTCJul 17, 16:55 UTC2h 15m
2026-07-17 DAL1628 SEA → LAX Jul 17, 14:39 UTCJul 17, 16:59 UTC2h 20m
2026-07-17 DAL2956 LAS → SEA Jul 17, 03:08 UTCJul 17, 05:09 UTC2h 1m
2026-07-17 DAL2956 LAS → SEA Jul 17, 03:10 UTCJul 17, 05:15 UTC2h 5m
2026-07-16 DAL1690 SLC → LAS Jul 16, 23:05 UTCJul 17, 00:04 UTC1h 0m

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 N3745B page for operator, model, and routing details .

Mode-S A445B0 frequently asked

What is Mode-S code A445B0?
A445B0 is an ICAO 24-bit transponder address. Allocated to United States. Assigned to N3745B.
Where is Mode-S A445B0 registered?
Mode-S code A445B0 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 A445B0 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 A445B0, octal 51042660, decimal 10,765,744.
What flights does A445B0 operate?
Mode-S A445B0 has broadcast 20 distinct callsigns, including DAL2419, DAL2259, DAL1399, DAL873, DAL1188.