Apparatus

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sensors Mode-S transponder

A3DFEB

ICAO 24-bit transponder address · allocated to United States

Currently assigned to N349NB · AIRBUS A-319 · operated by DELTA AIR LINES INC

Hex
A3DFEB
Octal
50757753
Decimal
10,739,691
Country
US
Tail
N349NB
Type
A319
No current signal · last broadcast 40m ago
Flights observed
486
Distinct callsigns
20
Country
US
Last broadcast
40m ago

Last known position

Most recent position reported by Mode-S A3DFEB.

Country allocation

The ICAO 24-bit address A3DFEB 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
DAL2282 - 12 2026-07-05
DAL2975 Delta Air Lines 9 2026-05-29
DAL2168 - 8 2026-07-11
DAL1438 Delta Air Lines 8 2026-06-01
DAL2958 Delta Air Lines 7 2026-05-14
DAL2785 Delta Air Lines 7 2026-06-17
DAL2459 Delta Air Lines 7 2026-05-29
DAL2008 Delta Air Lines 7 2026-05-05
DAL946 Delta Air Lines 6 2026-05-31
DAL2983 Delta Air Lines 6 2026-05-15
DAL2800 Delta Air Lines 6 2026-04-28
DAL2766 Delta Air Lines 6 2026-06-06
DAL2568 Delta Air Lines 6 2026-04-19
DAL2551 Delta Air Lines 6 2026-05-31
DAL2337 Delta Air Lines 6 2026-06-06
DAL1517 - 6 2026-06-11
DAL1454 - 6 2026-07-02
DAL1444 - 6 2026-07-10
DAL1061 Delta Air Lines 6 2026-04-20
DAL950 - 5 2026-07-13

Recent flights last 50

DateFlightRouteTakeoffLandingDuration
2026-07-14 DAL2707 - Jul 14, 01:05 UTCJul 14, 02:45 UTC1h 40m
2026-07-13 DAL360 DCA → ATL Jul 13, 21:25 UTCJul 13, 22:40 UTC1h 15m
2026-07-13 DAL360 ATL → DCA Jul 13, 18:45 UTCJul 13, 20:05 UTC1h 20m
2026-07-13 1324 IAD → ATL Jul 13, 15:35 UTCJul 13, 16:50 UTC1h 15m
2026-07-13 1324 ATL → IAD Jul 13, 12:45 UTCJul 13, 14:05 UTC1h 20m
2026-07-13 DAL950 - Jul 13, 01:40 UTCJul 13, 03:01 UTC1h 20m
2026-07-12 DAL950 ATL → DCA Jul 12, 22:45 UTCJul 13, 00:25 UTC1h 40m
2026-07-12 DAL1472 - Jul 12, 19:40 UTCJul 12, 21:15 UTC1h 35m
2026-07-12 DAL1472 EYW → ATL Jul 12, 19:34 UTCJul 12, 21:17 UTC1h 43m
2026-07-12 DAL1472 - Jul 12, 15:50 UTCJul 12, 17:10 UTC1h 20m
2026-07-12 DAL950 DCA → ATL Jul 12, 01:09 UTCJul 12, 02:30 UTC1h 21m
2026-07-12 DAL950 DCA → ATL Jul 12, 01:10 UTCJul 12, 02:35 UTC1h 25m
2026-07-11 DAL950 ATL → DCA Jul 11, 21:50 UTCJul 11, 23:05 UTC1h 15m
2026-07-11 DAL1671 - Jul 11, 18:15 UTCJul 11, 18:45 UTC30m
2026-07-11 DAL1671 EYW → ATL Jul 11, 18:10 UTCJul 11, 19:45 UTC1h 35m
2026-07-11 DAL1671 - Jul 11, 14:55 UTCJul 11, 16:25 UTC1h 30m
2026-07-11 DAL2168 - Jul 11, 00:35 UTCJul 11, 02:05 UTC1h 30m
2026-07-11 DAL2168 EYW → ATL Jul 11, 00:29 UTCJul 11, 02:02 UTC1h 33m
2026-07-10 DAL2168 - Jul 10, 19:40 UTCJul 10, 20:55 UTC1h 15m
2026-07-10 DAL2168 ATL → EYW Jul 10, 19:38 UTCJul 10, 21:09 UTC1h 31m
2026-07-10 DAL1444 IAD → ATL Jul 10, 17:15 UTCJul 10, 18:30 UTC1h 15m
2026-07-10 DAL1444 ATL → IAD Jul 10, 14:05 UTCJul 10, 15:25 UTC1h 20m
2026-07-10 DAL1136 CBF → ATL Jul 10, 10:40 UTCJul 10, 12:30 UTC1h 50m
2026-07-10 DAL2707 ATL → OMA Jul 10, 03:00 UTCJul 10, 04:55 UTC1h 55m
2026-07-10 DAL2132 - Jul 10, 01:00 UTCJul 10, 01:40 UTC40m
2026-07-09 DAL2821 - Jul 9, 20:35 UTCJul 9, 22:25 UTC1h 50m
2026-07-09 DAL2821 MSP → CLT Jul 9, 20:31 UTCJul 9, 22:21 UTC1h 50m
2026-07-09 DAL2007 SLC → MSY Jul 9, 16:35 UTCJul 9, 19:05 UTC2h 30m
2026-07-09 DAL2007 SLC → MSY Jul 9, 13:05 UTCJul 9, 15:10 UTC2h 5m
2026-07-09 DAL2863 DCA → MSP Jul 9, 01:30 UTCJul 9, 03:50 UTC2h 20m
2026-07-08 DAL2888 - Jul 8, 15:45 UTCJul 8, 17:40 UTC1h 55m
2026-07-08 DAL890 - Jul 8, 12:30 UTCJul 8, 14:05 UTC1h 35m
2026-07-08 DAL817 BOS → RDU Jul 8, 03:45 UTCJul 8, 05:11 UTC1h 26m
2026-07-08 DAL817 BOS → RDU Jul 8, 03:50 UTCJul 8, 05:15 UTC1h 25m
2026-07-08 DAL2816 - Jul 8, 00:15 UTCJul 8, 02:10 UTC1h 55m
2026-07-07 DAL2816 - Jul 7, 16:50 UTCJul 7, 19:00 UTC2h 10m
2026-07-07 DAL1022 - Jul 7, 14:00 UTCJul 7, 15:25 UTC1h 25m
2026-07-07 DAL2066 BOS → RDU Jul 7, 10:55 UTCJul 7, 12:25 UTC1h 30m
2026-07-07 DAL2646 - Jul 7, 00:55 UTCJul 7, 02:40 UTC1h 45m
2026-07-06 DAL2646 BOS → ORD Jul 6, 21:15 UTCJul 6, 23:30 UTC2h 15m
2026-07-06 DAL1033 - Jul 6, 18:25 UTCJul 6, 19:50 UTC1h 25m
2026-07-06 DAL2164 - Jul 6, 14:30 UTCJul 6, 15:40 UTC1h 10m
2026-07-06 DAL2497 - Jul 6, 10:30 UTCJul 6, 13:00 UTC2h 30m
2026-07-06 DAL2797 - Jul 6, 02:40 UTCJul 6, 05:05 UTC2h 25m
2026-07-06 DAL417 - Jul 6, 00:40 UTCJul 6, 01:10 UTC30m
2026-07-05 DAL417 - Jul 5, 22:15 UTCJul 5, 22:35 UTC20m
2026-07-05 DAL2282 - Jul 5, 19:40 UTCJul 5, 20:05 UTC25m
2026-07-05 DAL2282 - Jul 5, 17:20 UTCJul 5, 17:45 UTC25m
2026-07-05 DAL2618 AUS → SLC Jul 5, 13:30 UTCJul 5, 16:00 UTC2h 30m
2026-07-04 DAL1967 - Jul 4, 21:05 UTCJul 4, 22:45 UTC1h 40m

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 N349NB page for operator, model, and routing details .

Mode-S A3DFEB frequently asked

What is Mode-S code A3DFEB?
A3DFEB is an ICAO 24-bit transponder address. Allocated to United States. Assigned to N349NB.
Where is Mode-S A3DFEB registered?
Mode-S code A3DFEB 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 A3DFEB broadcasting right now?
No active broadcast right now. Last signal was 40m ago.
Hex, octal, and decimal Mode-S codes: what's the difference?
The same 24-bit identifier expressed in different bases: hex A3DFEB, octal 50757753, decimal 10,739,691.
What flights does A3DFEB operate?
Mode-S A3DFEB has broadcast 20 distinct callsigns, including DAL2282, DAL2975, DAL2168, DAL1438, DAL2958.