Apparatus

Try JFK, AAL1290, BAW, or N225AN.

sensors Mode-S transponder

A388AF

ICAO 24-bit transponder address · allocated to United States

Currently assigned to N327DU · operated by DELTA AIR LINES INC

Hex
A388AF
Octal
50704257
Decimal
10,717,359
Country
US
Tail
N327DU
Type
BCS3
Broadcasting now · callsign DAL2374 · 36,000 ft
Flights observed
480
Distinct callsigns
20
Country
US
Last broadcast
Jul 26, 21:00 UTC

Current position

A388AF is currently broadcasting. Map zoomed to live position.

Country allocation

The ICAO 24-bit address A388AF 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
DAL2917 Delta Air Lines 14 2026-07-03
DAL1390 - 13 2026-07-01
DAL572 - 12 2026-07-01
DAL1567 - 11 2026-06-29
DAL2310 - 9 2026-06-25
DAL2194 Delta Air Lines 8 2026-06-10
DAL2985 - 7 2026-06-30
DAL2930 - 7 2026-06-27
DAL2785 Delta Air Lines 7 2026-07-24
DAL1387 - 7 2026-07-02
DAL853 - 6 2026-07-17
DAL814 Delta Air Lines 6 2026-05-24
DAL739 - 6 2026-07-19
DAL2677 Delta Air Lines 6 2026-07-26
DAL2226 Delta Air Lines 6 2026-06-06
DAL2068 - 6 2026-07-02
DAL1529 Delta Air Lines 6 2026-05-24
DAL878 Delta Air Lines 5 2026-04-14
DAL303 - 5 2026-07-14
DAL2617 - 5 2026-06-27

Recent flights last 50

DateFlightRouteTakeoffLandingDuration
2026-07-26 DAL2677 MSP → MCO Jul 26, 18:50 UTCJul 26, 21:00 UTC2h 10m
2026-07-26 DAL675 BOS → FLL Jul 26, 14:45 UTCJul 26, 17:20 UTC2h 35m
2026-07-26 DAL675 BOS → FLL Jul 26, 10:15 UTCJul 26, 13:05 UTC2h 50m
2026-07-25 DAL2646 PVD → ATL Jul 25, 22:10 UTCJul 26, 00:00 UTC1h 50m
2026-07-25 DAL2646 PVD → ATL Jul 25, 18:20 UTCJul 25, 20:30 UTC2h 10m
2026-07-25 DAL2098 LGA → MCO Jul 25, 12:35 UTCJul 25, 16:15 UTC3h 40m
2026-07-24 DAL1677 ATL → SFO Jul 24, 23:50 UTCJul 25, 03:35 UTC3h 45m
2026-07-24 DAL1677 ATL → SFO Jul 24, 23:47 UTCJul 25, 03:36 UTC3h 49m
2026-07-24 DAL2785 DTW → STL Jul 24, 20:05 UTCJul 24, 22:00 UTC1h 55m
2026-07-24 DAL2785 DTW → STL Jul 24, 16:25 UTCJul 24, 18:15 UTC1h 50m
2026-07-24 DAL2509 DTW → MSY Jul 24, 12:45 UTCJul 24, 14:45 UTC2h 0m
2026-07-24 DAL2586 XNA → ATL Jul 24, 00:20 UTCJul 24, 02:35 UTC2h 15m
2026-07-24 DAL2586 XNA → ATL Jul 24, 00:15 UTCJul 24, 02:37 UTC2h 22m
2026-07-23 DAL2785 DTW → STL Jul 23, 21:00 UTCJul 23, 22:45 UTC1h 45m
2026-07-23 DAL2785 DTW → STL Jul 23, 17:35 UTCJul 23, 19:45 UTC2h 10m
2026-07-23 DAL2509 - Jul 23, 12:45 UTCJul 23, 14:55 UTC2h 10m
2026-07-22 DAL2677 MSP → MCO Jul 22, 18:55 UTCJul 22, 21:30 UTC2h 35m
2026-07-22 DAL2677 MSP → MCO Jul 22, 18:54 UTCJul 22, 21:22 UTC2h 28m
2026-07-22 DAL2509 - Jul 22, 12:45 UTCJul 22, 14:55 UTC2h 10m
2026-07-22 DAL2586 XNA → ATL Jul 22, 04:55 UTCJul 22, 05:25 UTC30m
2026-07-21 DAL816 LAX → AUS Jul 21, 23:15 UTCJul 22, 02:50 UTC3h 35m
2026-07-21 DAL1297 LGA → MSY Jul 21, 17:30 UTCJul 21, 21:35 UTC4h 5m
2026-07-20 DAL1297 LGA → MSY Jul 20, 23:05 UTCJul 21, 02:50 UTC3h 44m
2026-07-20 DAL1297 LGA → MSY Jul 20, 17:45 UTCJul 20, 21:20 UTC3h 35m
2026-07-20 DAL2098 AUS → BOS Jul 20, 12:30 UTCJul 20, 16:10 UTC3h 40m
2026-07-20 DAL1677 - Jul 20, 01:05 UTCJul 20, 04:45 UTC3h 40m
2026-07-20 DAL1677 BOS → AUS Jul 20, 01:02 UTCJul 20, 04:34 UTC3h 32m
2026-07-19 DAL1156 BNA → BOS Jul 19, 19:40 UTCJul 19, 23:30 UTC3h 50m
2026-07-19 DAL739 SEA → AUS Jul 19, 14:30 UTCJul 19, 18:06 UTC3h 36m
2026-07-19 DAL739 SEA → AUS Jul 19, 14:35 UTCJul 19, 18:05 UTC3h 30m
2026-07-19 DAL925 DFW → LGA Jul 19, 09:30 UTCJul 19, 12:30 UTC3h 0m
2026-07-19 DAL936 JFK → DEN Jul 19, 04:40 UTCJul 19, 07:50 UTC3h 10m
2026-07-18 DAL831 SEA → AUS Jul 18, 00:15 UTCJul 18, 03:55 UTC3h 41m
2026-07-17 DAL831 SEA → AUS Jul 17, 18:55 UTCJul 17, 22:40 UTC3h 45m
2026-07-17 DAL853 ANC → SEA Jul 17, 14:03 UTCJul 17, 17:13 UTC3h 10m
2026-07-17 DAL853 ANC → SEA Jul 17, 14:04 UTCJul 17, 17:15 UTC3h 10m
2026-07-16 DAL928 SEA → ANC Jul 16, 22:19 UTCJul 17, 01:25 UTC3h 5m
2026-07-16 DAL2870 - Jul 16, 18:50 UTCJul 16, 20:19 UTC1h 30m
2026-07-16 DAL2870 SFO → SEA Jul 16, 18:47 UTCJul 16, 20:21 UTC1h 34m
2026-07-16 DAL2870 SEA → SFO Jul 16, 14:50 UTCJul 16, 16:44 UTC1h 55m
2026-07-16 DAL2408 - Jul 16, 09:50 UTCJul 16, 13:00 UTC3h 10m
2026-07-16 DAL2186 - Jul 16, 04:50 UTCJul 16, 08:25 UTC3h 35m
2026-07-15 DAL1061 - Jul 15, 22:45 UTCJul 16, 02:10 UTC3h 25m
2026-07-15 DAL1061 FAI → SEA Jul 15, 22:43 UTCJul 16, 02:12 UTC3h 29m
2026-07-15 DAL1061 - Jul 15, 18:00 UTCJul 15, 21:20 UTC3h 20m
2026-07-15 DAL372 - Jul 15, 12:15 UTCJul 15, 16:15 UTC4h 0m
2026-07-15 DAL815 - Jul 15, 02:35 UTCJul 15, 06:35 UTC4h 0m
2026-07-15 DAL815 SEA → BNA Jul 15, 02:31 UTCJul 15, 06:34 UTC4h 3m
2026-07-14 DAL408 DFW → SEA Jul 14, 21:30 UTCJul 15, 00:55 UTC3h 24m
2026-07-14 DAL303 - Jul 14, 16:15 UTCJul 14, 19:35 UTC3h 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 N327DU page for operator, model, and routing details .

Mode-S A388AF frequently asked

What is Mode-S code A388AF?
A388AF is an ICAO 24-bit transponder address. Allocated to United States. Assigned to N327DU.
Where is Mode-S A388AF registered?
Mode-S code A388AF 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 A388AF broadcasting right now?
Yes. Mode-S A388AF is currently airborne.
Hex, octal, and decimal Mode-S codes: what's the difference?
The same 24-bit identifier expressed in different bases: hex A388AF, octal 50704257, decimal 10,717,359.
What flights does A388AF operate?
Mode-S A388AF has broadcast 20 distinct callsigns, including DAL2917, DAL1390, DAL572, DAL1567, DAL2310.