Apparatus

Try JFK, AAL1290, BAW, or N225AN.

sensors Mode-S transponder

A475A3

ICAO 24-bit transponder address · allocated to United States

Currently assigned to N387DN · AIRBUS A-321 · operated by DELTA AIR LINES INC

Hex
A475A3
Octal
51072643
Decimal
10,778,019
Country
US
Tail
N387DN
Type
A321
No current signal · last broadcast Jul 26, 22:25 UTC
Flights observed
521
Distinct callsigns
20
Country
US
Last broadcast
Jul 26, 22:25 UTC

Last known position

Most recent position reported by Mode-S A475A3.

Country allocation

The ICAO 24-bit address A475A3 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
DAL2321 - 15 2026-06-18
DAL995 - 10 2026-07-08
DAL992 - 8 2026-07-04
DAL1231 Delta Air Lines 7 2026-07-24
DAL460 - 6 2026-07-10
DAL2396 Delta Air Lines 6 2026-05-04
DAL1487 - 6 2026-07-10
DAL906 Delta Air Lines 5 2026-06-02
DAL525 Delta Air Lines 5 2026-07-17
DAL520 - 5 2026-07-04
DAL490 Delta Air Lines 5 2026-05-20
DAL431 - 5 2026-06-26
DAL2520 - 5 2026-07-18
DAL2465 - 5 2026-04-13
DAL2258 Delta Air Lines 5 2026-07-24
DAL2172 Delta Air Lines 5 2026-05-22
DAL1177 Delta Air Lines 5 2026-07-26
DAL1089 Delta Air Lines 5 2026-07-25
DAL997 Delta Air Lines 4 2026-06-03
DAL990 Delta Air Lines 4 2026-07-22

Recent flights last 50

DateFlightRouteTakeoffLandingDuration
2026-07-26 DAL2936 BOS → LGA Jul 26, 20:15 UTCJul 26, 22:15 UTC2h 0m
2026-07-26 DAL1177 TUS → ATL Jul 26, 17:05 UTCJul 26, 18:35 UTC1h 30m
2026-07-26 DAL1177 TUS → ATL Jul 26, 13:55 UTCJul 26, 15:30 UTC1h 35m
2026-07-25 DAL2607 ATL → GSO Jul 25, 23:20 UTCJul 26, 02:00 UTC2h 40m
2026-07-25 DAL2825 ATL → MSP Jul 25, 18:55 UTCJul 25, 21:10 UTC2h 15m
2026-07-25 DAL2825 ATL → MSP Jul 25, 18:58 UTCJul 25, 21:14 UTC2h 16m
2026-07-25 DAL1089 ATL → RSW Jul 25, 15:05 UTCJul 25, 16:25 UTC1h 20m
2026-07-25 DAL1089 ATL → RSW Jul 25, 12:15 UTCJul 25, 13:25 UTC1h 10m
2026-07-25 DAL819 ATL → LGA Jul 25, 06:00 UTCJul 25, 10:00 UTC4h 0m
2026-07-25 DAL819 ATL → LGA Jul 25, 00:35 UTCJul 25, 04:20 UTC3h 45m
2026-07-24 DAL824 ATL → SFO Jul 24, 19:55 UTCJul 24, 22:40 UTC2h 45m
2026-07-24 DAL2927 LAX → PHX Jul 24, 16:35 UTCJul 24, 18:15 UTC1h 40m
2026-07-24 DAL2258 DTW → BOS Jul 24, 13:15 UTCJul 24, 14:40 UTC1h 25m
2026-07-24 DAL2258 DTW → BOS Jul 24, 13:14 UTCJul 24, 14:38 UTC1h 24m
2026-07-24 DAL1231 MSP → BOS Jul 24, 10:20 UTCJul 24, 11:40 UTC1h 20m
2026-07-24 DAL2466 BOS → ROC Jul 24, 00:10 UTCJul 24, 02:25 UTC2h 15m
2026-07-23 DAL2460 FSD → MSP Jul 23, 20:00 UTCJul 23, 22:30 UTC2h 30m
2026-07-23 DAL2764 MSY → BOS Jul 23, 15:50 UTCJul 23, 18:00 UTC2h 10m
2026-07-23 DAL2668 BDL → MSP Jul 23, 11:40 UTCJul 23, 13:50 UTC2h 10m
2026-07-22 DAL3152 SDF → ATL Jul 22, 23:20 UTCJul 23, 00:30 UTC1h 10m
2026-07-22 DAL3152 SDF → ATL Jul 22, 20:10 UTCJul 22, 21:20 UTC1h 10m
2026-07-22 DAL990 DTW → BOS Jul 22, 16:54 UTCJul 22, 18:43 UTC1h 49m
2026-07-22 DAL990 DTW → BOS Jul 22, 16:55 UTCJul 22, 18:45 UTC1h 50m
2026-07-22 DAL513 ATL → EWR Jul 22, 12:50 UTCJul 22, 14:35 UTC1h 45m
2026-07-22 DAL1232 DEN → DTW Jul 22, 02:10 UTCJul 22, 04:10 UTC2h 0m
2026-07-21 DAL1413 - Jul 21, 21:00 UTCJul 21, 22:25 UTC1h 25m
2026-07-21 DAL1413 ATL → FLL Jul 21, 17:55 UTCJul 21, 19:20 UTC1h 25m
2026-07-21 DAL1089 ATL → RSW Jul 21, 15:05 UTCJul 21, 16:30 UTC1h 25m
2026-07-21 DAL1089 ATL → RSW Jul 21, 15:01 UTCJul 21, 16:20 UTC1h 19m
2026-07-21 DAL1089 ATL → RSW Jul 21, 12:10 UTCJul 21, 13:30 UTC1h 20m
2026-07-21 DAL1465 - Jul 21, 04:15 UTCJul 21, 06:15 UTC2h 0m
2026-07-20 DAL1465 ATL → SAT Jul 20, 20:00 UTCJul 20, 21:50 UTC1h 50m
2026-07-20 DAL2235 SJC → SLC Jul 20, 15:55 UTCJul 20, 18:20 UTC2h 25m
2026-07-20 DAL2235 SJC → SLC Jul 20, 11:35 UTCJul 20, 14:05 UTC2h 30m
2026-07-20 DAL828 - Jul 20, 05:15 UTCJul 20, 09:15 UTC4h 0m
2026-07-19 DAL369 BTV → ATL Jul 19, 20:50 UTCJul 20, 00:40 UTC3h 50m
2026-07-19 DAL2222 YUL → ATL Jul 19, 17:36 UTCJul 19, 19:06 UTC1h 30m
2026-07-19 DAL2222 YUL → ATL Jul 19, 17:40 UTCJul 19, 19:15 UTC1h 35m
2026-07-19 DAL2648 DTW → BOS Jul 19, 14:25 UTCJul 19, 15:50 UTC1h 25m
2026-07-19 DAL1201 MCO → DTW Jul 19, 10:20 UTCJul 19, 12:25 UTC2h 5m
2026-07-19 DAL1733 - Jul 19, 04:45 UTCJul 19, 04:50 UTC5m
2026-07-19 DAL1733 ATL → MCO Jul 19, 03:24 UTCJul 19, 04:30 UTC1h 6m
2026-07-19 DAL1733 ATL → MCO Jul 19, 03:25 UTCJul 19, 04:50 UTC1h 25m
2026-07-18 DAL2053 DTW → ATL Jul 18, 22:30 UTCJul 19, 00:15 UTC1h 45m
2026-07-18 DAL1474 FLL → LGA Jul 18, 18:10 UTCJul 18, 20:40 UTC2h 30m
2026-07-18 DAL1474 FLL → LGA Jul 18, 14:25 UTCJul 18, 16:40 UTC2h 15m
2026-07-18 DAL1231 LGA → DTW Jul 18, 10:20 UTCJul 18, 11:45 UTC1h 25m
2026-07-18 DAL2520 MCO → LGA Jul 18, 02:00 UTCJul 18, 04:10 UTC2h 11m
2026-07-17 DAL2520 LGA → MCO Jul 17, 21:10 UTCJul 17, 23:20 UTC2h 10m
2026-07-17 DAL525 LGA → MCO Jul 17, 16:55 UTCJul 17, 18:44 UTC1h 50m

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 N387DN page for operator, model, and routing details .

Mode-S A475A3 frequently asked

What is Mode-S code A475A3?
A475A3 is an ICAO 24-bit transponder address. Allocated to United States. Assigned to N387DN.
Where is Mode-S A475A3 registered?
Mode-S code A475A3 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 A475A3 broadcasting right now?
No active broadcast right now. Last signal was Jul 26, 22:25 UTC.
Hex, octal, and decimal Mode-S codes: what's the difference?
The same 24-bit identifier expressed in different bases: hex A475A3, octal 51072643, decimal 10,778,019.
What flights does A475A3 operate?
Mode-S A475A3 has broadcast 20 distinct callsigns, including DAL2321, DAL995, DAL992, DAL1231, DAL460.