Apparatus

Try JFK, AAL1290, BAW, or N225AN.

sensors Mode-S transponder

A3271E

ICAO 24-bit transponder address · allocated to United States

Currently assigned to N302DU · AIRBUS A220-300 · operated by DELTA AIR LINES INC

Hex
A3271E
Octal
50623436
Decimal
10,692,382
Country
US
Tail
N302DU
Type
BCS3
No current signal · last broadcast 1h ago
Flights observed
209
Distinct callsigns
20
Country
US
Last broadcast
1h ago

Last known position

Most recent position reported by Mode-S A3271E.

Country allocation

The ICAO 24-bit address A3271E 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
DAL691 Delta Air Lines 7 2026-05-28
DAL483 Delta Air Lines 7 2026-05-24
DAL1358 Delta Air Lines 7 2026-05-23
DAL870 Delta Air Lines 6 2026-05-29
DAL831 Delta Air Lines 6 2026-05-14
DAL1412 Delta Air Lines 5 2026-05-29
DAL1015 Delta Air Lines 5 2026-05-25
DAL804 Delta Air Lines 4 2026-05-29
DAL2819 Delta Air Lines 4 2026-05-18
DAL2549 Delta Air Lines 4 2026-05-25
DAL2412 Delta Air Lines 4 2026-05-17
DAL2354 Delta Air Lines 4 2026-06-04
DAL2218 Delta Air Lines 4 2026-06-04
DAL1410 Delta Air Lines 4 2026-06-03
DAL1390 Delta Air Lines 4 2026-05-20
DAL1354 Delta Air Lines 4 2026-05-24
DAL1203 Delta Air Lines 4 2026-04-24
DAL1156 Delta Air Lines 4 2026-06-04
DAL739 Delta Air Lines 3 2026-06-04
DAL716 Delta Air Lines 3 2026-04-29

Recent flights last 50

DateFlightRouteTakeoffLandingDuration
2026-06-05 DAL2804 ATL → DAY Jun 5, 00:55 UTCJun 5, 03:10 UTC2h 15m
2026-06-04 DAL1156 BNA → BOS Jun 4, 19:45 UTCJun 4, 23:25 UTC3h 40m
2026-06-04 DAL739 MIA → LAX Jun 4, 14:30 UTCJun 4, 18:00 UTC3h 30m
2026-06-04 DAL2218 ORD → BOS Jun 4, 12:10 UTCJun 4, 12:55 UTC45m
2026-06-04 DAL2218 ORD → BOS Jun 4, 12:08 UTCJun 4, 12:52 UTC44m
2026-06-04 DAL2354 PHL → ATL Jun 4, 06:05 UTCJun 4, 06:45 UTC40m
2026-06-04 DAL2354 PHL → ATL Jun 4, 06:04 UTCJun 4, 06:42 UTC38m
2026-06-04 DAL2318 CLT → ATL Jun 4, 01:50 UTCJun 4, 04:25 UTC2h 35m
2026-06-03 DAL2318 CLT → ATL Jun 3, 22:10 UTCJun 4, 00:20 UTC2h 10m
2026-06-03 DAL1684 JFK → FLL Jun 3, 16:35 UTCJun 3, 20:25 UTC3h 50m
2026-06-03 DAL1410 PHL → ATL Jun 3, 11:50 UTCJun 3, 15:20 UTC3h 30m
2026-06-03 DAL303 JFK → SFO Jun 3, 00:40 UTCJun 3, 04:05 UTC3h 25m
2026-06-02 DAL303 JFK → SFO Jun 2, 16:30 UTCJun 2, 20:05 UTC3h 35m
2026-06-02 DAL2509 DTW → MSY Jun 2, 12:15 UTCJun 2, 14:20 UTC2h 5m
2026-06-01 DAL2586 XNA → ATL Jun 1, 23:45 UTCJun 2, 02:06 UTC2h 21m
2026-06-01 DAL2586 XNA → ATL Jun 1, 23:45 UTCJun 2, 02:10 UTC2h 25m
2026-06-01 DAL2645 MSP → EWR Jun 1, 18:20 UTCJun 1, 22:00 UTC3h 40m
2026-06-01 DAL2645 MSP → EWR Jun 1, 18:18 UTCJun 1, 21:57 UTC3h 39m
2026-06-01 DAL2652 JFK → MCO Jun 1, 12:50 UTCJun 1, 16:50 UTC4h 0m
2026-05-31 DAL2677 MSP → MCO May 31, 23:20 UTCJun 1, 01:30 UTC2h 10m
2026-05-31 DAL2677 MSP → MCO May 31, 19:20 UTCMay 31, 21:35 UTC2h 15m
2026-05-31 DAL675 BOS → FLL May 31, 15:00 UTCMay 31, 17:40 UTC2h 40m
2026-05-31 DAL675 BOS → FLL May 31, 10:10 UTCMay 31, 13:00 UTC2h 50m
2026-05-30 DAL2646 PVD → ATL May 30, 22:05 UTCMay 31, 00:10 UTC2h 5m
2026-05-30 DAL2646 PVD → ATL May 30, 22:04 UTCMay 31, 00:05 UTC2h 1m
2026-05-30 DAL1007 BOS → RDU May 30, 16:25 UTCMay 30, 18:35 UTC2h 10m
2026-05-30 DAL2509 DTW → MSY May 30, 12:20 UTCMay 30, 14:35 UTC2h 15m
2026-05-30 DAL815 LAS → BOS May 30, 01:00 UTCMay 30, 05:10 UTC4h 10m
2026-05-29 DAL1412 MSP → SLC May 29, 21:05 UTCMay 29, 22:40 UTC1h 35m
2026-05-29 DAL1412 MSP → SLC May 29, 21:01 UTCMay 29, 22:33 UTC1h 32m
2026-05-29 DAL1412 MSP → SLC May 29, 18:00 UTCMay 29, 19:40 UTC1h 40m
2026-05-29 DAL804 MCI → LGA May 29, 11:45 UTCMay 29, 15:25 UTC3h 40m
2026-05-29 DAL804 MCI → LGA May 29, 11:41 UTCMay 29, 15:23 UTC3h 42m
2026-05-29 DAL870 JFK → LAS May 29, 01:10 UTCMay 29, 04:50 UTC3h 40m
2026-05-28 DAL691 DFW → LGA May 28, 21:20 UTCMay 28, 23:35 UTC2h 15m
2026-05-28 DAL691 DFW → LGA May 28, 17:15 UTCMay 28, 19:35 UTC2h 20m
2026-05-28 DAL804 MCI → LGA May 28, 11:50 UTCMay 28, 15:05 UTC3h 15m
2026-05-28 DAL870 JFK → LAS May 28, 03:35 UTCMay 28, 05:15 UTC1h 40m
2026-05-28 DAL870 JFK → LAS May 28, 01:30 UTCMay 28, 03:05 UTC1h 35m
2026-05-27 DAL691 DFW → LGA May 27, 21:15 UTCMay 27, 23:40 UTC2h 25m
2026-05-27 DAL691 DFW → LGA May 27, 21:10 UTCMay 27, 23:31 UTC2h 21m
2026-05-27 DAL691 DFW → LGA May 27, 17:10 UTCMay 27, 19:25 UTC2h 15m
2026-05-27 DAL804 MCI → LGA May 27, 11:50 UTCMay 27, 15:15 UTC3h 25m
2026-05-27 DAL870 JFK → LAS May 27, 07:15 UTCMay 27, 08:05 UTC50m
2026-05-27 DAL870 JFK → LAS May 27, 07:10 UTCMay 27, 08:05 UTC55m
2026-05-27 DAL870 JFK → LAS May 27, 01:09 UTCMay 27, 04:55 UTC3h 45m
2026-05-26 DAL691 DFW → LGA May 26, 21:14 UTCMay 26, 23:39 UTC2h 25m
2026-05-26 DAL691 DFW → LGA May 26, 17:35 UTCMay 26, 19:50 UTC2h 15m
2026-05-26 DAL2105 DTW → GRR May 26, 12:20 UTCMay 26, 15:24 UTC3h 5m
2026-05-26 DAL2105 DTW → GRR May 26, 12:18 UTCMay 26, 15:25 UTC3h 7m

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 N302DU page for operator, model, and routing details .

Mode-S A3271E frequently asked

What is Mode-S code A3271E?
A3271E is an ICAO 24-bit transponder address. Allocated to United States. Assigned to N302DU.
Where is Mode-S A3271E registered?
Mode-S code A3271E 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 A3271E broadcasting right now?
No active broadcast right now. Last signal was 1h ago.
Hex, octal, and decimal Mode-S codes: what's the difference?
The same 24-bit identifier expressed in different bases: hex A3271E, octal 50623436, decimal 10,692,382.
What flights does A3271E operate?
Mode-S A3271E has broadcast 20 distinct callsigns, including DAL691, DAL483, DAL1358, DAL870, DAL831.