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
Broadcasting now · callsign DAL2993 · 37,000 ft
Flights observed
401
Distinct callsigns
20
Country
US
Last broadcast
50m ago

Current position

A445B0 is currently broadcasting. Map zoomed to live position.

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
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
DAL2444 Delta Air Lines 6 2026-05-20
DAL2782 - 5 2026-07-05
DAL2533 Delta Air Lines 5 2026-05-21
DAL2108 Delta Air Lines 5 2026-05-22
DAL1714 Delta Air Lines 5 2026-04-26
DAL593 Delta Air Lines 4 2026-06-15
DAL511 - 4 2026-06-14
DAL2698 Delta Air Lines 4 2026-05-20
DAL2633 Delta Air Lines 4 2026-05-10
DAL2585 Delta Air Lines 4 2026-05-03
DAL2515 Delta Air Lines 4 2026-05-27
DAL2290 Delta Air Lines 4 2026-05-26
DAL2200 Delta Air Lines 4 2026-06-10
DAL1906 Delta Air Lines 4 2026-06-09
DAL1679 - 4 2026-07-07

Recent flights last 50

DateFlightRouteTakeoffLandingDuration
2026-07-14 DAL2993 - Jul 14, 05:30 UTCJul 14, 05:45 UTC15m
2026-07-14 DAL2209 BNA → SLC Jul 14, 01:20 UTCJul 14, 04:20 UTC3h 0m
2026-07-13 DAL2205 SLC → BNA Jul 13, 20:25 UTCJul 13, 23:30 UTC3h 5m
2026-07-13 DAL432 IAD → SLC Jul 13, 13:20 UTCJul 13, 17:00 UTC3h 40m
2026-07-13 DAL847 SLC → IAD Jul 13, 00:05 UTCJul 13, 03:45 UTC3h 40m
2026-07-12 DAL1068 - Jul 12, 15:30 UTCJul 12, 18:25 UTC2h 55m
2026-07-11 DAL2317 SLC → BNA Jul 11, 23:50 UTCJul 12, 02:35 UTC2h 45m
2026-07-11 DAL1452 GEG → SLC Jul 11, 21:10 UTCJul 11, 22:30 UTC1h 20m
2026-07-11 DAL1452 SLC → GEG Jul 11, 17:45 UTCJul 11, 19:00 UTC1h 15m
2026-07-11 DAL2231 ORD → SLC Jul 11, 13:05 UTCJul 11, 15:55 UTC2h 50m
2026-07-10 DAL2377 SLC → ORD Jul 10, 20:50 UTCJul 10, 23:30 UTC2h 40m
2026-07-10 DAL2377 SLC → ORD Jul 10, 20:50 UTCJul 10, 23:33 UTC2h 43m
2026-07-10 DAL1971 SLC → SLC Jul 10, 16:15 UTCJul 10, 19:20 UTC3h 5m
2026-07-10 DAL2876 - Jul 10, 11:30 UTCJul 10, 14:45 UTC3h 15m
2026-07-09 DAL2291 SLC → CVG Jul 9, 23:35 UTCJul 10, 02:30 UTC2h 55m
2026-07-09 DAL1595 - Jul 9, 20:25 UTCJul 9, 21:25 UTC1h 0m
2026-07-09 DAL1595 - Jul 9, 17:50 UTCJul 9, 18:20 UTC30m
2026-07-09 DAL1068 - Jul 9, 12:50 UTCJul 9, 16:00 UTC3h 10m
2026-07-09 DAL2317 - Jul 9, 00:45 UTCJul 9, 03:35 UTC2h 50m
2026-07-08 DAL1951 - Jul 8, 20:55 UTCJul 8, 22:50 UTC1h 55m
2026-07-08 DAL1952 - Jul 8, 16:25 UTCJul 8, 18:20 UTC1h 55m
2026-07-08 DAL1952 SLC → SJD Jul 8, 16:23 UTCJul 8, 18:53 UTC2h 30m
2026-07-08 DAL2876 - Jul 8, 11:20 UTCJul 8, 14:35 UTC3h 15m
2026-07-07 DAL1679 TPA → CVG Jul 7, 22:35 UTCJul 8, 00:20 UTC1h 45m
2026-07-07 DAL1679 - Jul 7, 19:30 UTCJul 7, 21:20 UTC1h 50m
2026-07-07 DAL1603 PBI → ATL Jul 7, 16:05 UTCJul 7, 18:00 UTC1h 55m
2026-07-07 DAL2474 BOS → RSW Jul 7, 11:50 UTCJul 7, 14:40 UTC2h 50m
2026-07-06 DAL1399 - Jul 6, 23:05 UTCJul 7, 01:45 UTC2h 40m
2026-07-06 DAL1399 - Jul 6, 17:25 UTCJul 6, 20:00 UTC2h 35m
2026-07-06 DAL1399 BOS → MIA Jul 6, 17:22 UTCJul 6, 20:15 UTC2h 53m
2026-07-06 DAL9961 VQQ → ATL Jul 6, 14:40 UTCJul 6, 16:05 UTC1h 25m
2026-07-05 DAL2782 BOS → RDU Jul 5, 22:17 UTCJul 5, 23:45 UTC1h 28m
2026-07-05 DAL2782 BOS → RDU Jul 5, 22:20 UTCJul 5, 23:55 UTC1h 35m
2026-07-05 DAL1399 - Jul 5, 16:00 UTCJul 5, 18:45 UTC2h 45m
2026-07-05 DAL1399 - Jul 5, 11:35 UTCJul 5, 14:25 UTC2h 50m
2026-07-04 DAL1010 - Jul 4, 22:20 UTCJul 5, 01:20 UTC3h 0m
2026-07-04 DAL1010 MIA → BOS Jul 4, 22:18 UTCJul 5, 01:05 UTC2h 47m
2026-07-04 DAL2300 - Jul 4, 18:35 UTCJul 4, 20:20 UTC1h 45m
2026-07-04 DAL2300 - Jul 4, 17:50 UTCJul 4, 18:30 UTC40m
2026-07-04 DAL2339 - Jul 4, 13:45 UTCJul 4, 16:10 UTC2h 25m
2026-07-04 DAL1620 LGA → MIA Jul 4, 02:06 UTCJul 4, 04:45 UTC2h 39m
2026-07-04 DAL1620 LGA → MIA Jul 4, 02:10 UTCJul 4, 04:45 UTC2h 35m
2026-07-03 DAL2770 BOS → LGA Jul 3, 11:00 UTCJul 3, 11:45 UTC45m
2026-07-03 DAL2770 BOS → LGA Jul 3, 11:00 UTCJul 3, 11:41 UTC41m
2026-07-02 DAL2393 - Jul 2, 23:55 UTCJul 3, 01:15 UTC1h 20m
2026-07-02 DAL2393 RDU → BOS Jul 2, 23:50 UTCJul 3, 01:19 UTC1h 29m
2026-07-02 DAL2782 - Jul 2, 20:50 UTCJul 2, 22:15 UTC1h 25m
2026-07-02 DAL2782 BOS → RDU Jul 2, 20:47 UTCJul 2, 22:13 UTC1h 26m
2026-07-02 DAL2782 BNH → BNH Jul 2, 20:30 UTCJul 2, 20:35 UTC5m
2026-07-02 DAL1399 - Jul 2, 16:10 UTCJul 2, 19:05 UTC2h 55m

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?
Yes. Mode-S A445B0 is currently airborne.
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, DAL1399, DAL873, DAL1188, DAL687.