Apparatus

Try JFK, AAL1290, BAW, or N225AN.

sensors Mode-S transponder

A4DFA6

ICAO 24-bit transponder address · allocated to United States

Currently assigned to N413DX · AIRBUS A-330-900 · operated by DELTA AIR LINES INC

Hex
A4DFA6
Octal
51157646
Decimal
10,805,158
Country
US
Tail
N413DX
Type
A339
No current signal · last broadcast 1h ago
Flights observed
243
Distinct callsigns
20
Country
US
Last broadcast
1h ago

Last known position

Most recent position reported by Mode-S A4DFA6.

Country allocation

The ICAO 24-bit address A4DFA6 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
DAL215 - 11 2026-07-13
DAL214 - 11 2026-07-12
DAL71 Delta Air Lines 10 2026-05-20
DAL241 - 10 2026-07-02
DAL101 - 10 2026-07-11
DAL81 Delta Air Lines 8 2026-05-15
DAL222 - 8 2026-07-01
DAL80 Delta Air Lines 7 2026-05-15
DAL70 Delta Air Lines 7 2026-05-22
DAL297 - 7 2026-07-09
DAL110 - 7 2026-07-06
DAL66 - 6 2026-07-10
DAL296 - 6 2026-07-08
DAL242 - 6 2026-06-14
DAL164 Delta Air Lines 6 2026-05-12
DAL67 - 5 2026-07-10
DAL243 - 5 2026-06-14
DAL240 Delta Air Lines 5 2026-06-14
DAL223 - 5 2026-06-15
DAL133 Delta Air Lines 5 2026-04-22

Recent flights last 50

DateFlightRouteTakeoffLandingDuration
2026-07-13 DAL54 - Jul 13, 23:15 UTCJul 14, 00:45 UTC1h 30m
2026-07-13 DAL215 - Jul 13, 19:00 UTCJul 13, 19:20 UTC20m
2026-07-13 DAL215 - Jul 13, 08:40 UTCJul 13, 09:30 UTC50m
2026-07-13 DAL215 FCO → ATL Jul 13, 08:39 UTCJul 13, 18:43 UTC10h 4m
2026-07-12 DAL214 ATL → FCO Jul 12, 20:39 UTCJul 13, 05:48 UTC9h 9m
2026-07-12 DAL214 - Jul 12, 20:40 UTCJul 13, 05:31 UTC8h 50m
2026-07-11 DAL110A EZE → ATL Jul 11, 18:40 UTCJul 12, 04:35 UTC9h 55m
2026-07-11 DAL101 ATL → EZE Jul 11, 03:46 UTCJul 11, 13:04 UTC9h 18m
2026-07-11 DAL101 ATL → EZE Jul 11, 03:50 UTCJul 11, 13:15 UTC9h 25m
2026-07-10 DAL67 - Jul 10, 12:50 UTCJul 10, 23:05 UTC10h 15m
2026-07-10 DAL66 ATL → FCO Jul 10, 00:45 UTCJul 10, 09:55 UTC9h 10m
2026-07-09 DAL297 ATH → ATL Jul 9, 09:59 UTCJul 9, 21:42 UTC11h 43m
2026-07-09 DAL297 ATH → ATL Jul 9, 10:00 UTCJul 9, 21:45 UTC11h 45m
2026-07-08 DAL296 ATL → ATH Jul 8, 21:00 UTCJul 9, 07:25 UTC10h 25m
2026-07-08 DAL296 ATL → ATH Jul 8, 20:58 UTCJul 9, 07:25 UTC10h 27m
2026-07-08 DAL215 - Jul 8, 08:15 UTCJul 8, 18:15 UTC10h 0m
2026-07-07 DAL214 ATL → FCO Jul 7, 20:20 UTCJul 8, 05:30 UTC9h 10m
2026-07-06 DAL110 - Jul 6, 23:20 UTCJul 7, 09:05 UTC9h 45m
2026-07-06 DAL101 ATL → EZE Jul 6, 03:35 UTCJul 6, 13:00 UTC9h 25m
2026-07-05 DAL109 - Jul 5, 08:15 UTCJul 5, 17:00 UTC8h 45m
2026-07-04 DAL62 ATL → FCO Jul 4, 22:55 UTCJul 5, 05:10 UTC6h 15m
2026-07-04 DAL59 - Jul 4, 09:00 UTCJul 4, 15:55 UTC6h 55m
2026-07-03 DAL16 - Jul 3, 23:50 UTCJul 4, 06:40 UTC6h 50m
2026-07-03 DAL16 DTW → LHR Jul 3, 23:49 UTCJul 4, 06:26 UTC6h 37m
2026-07-03 DAL17 LHR → DTW Jul 3, 12:10 UTCJul 3, 20:08 UTC7h 58m
2026-07-03 DAL17 LHR → DTW Jul 3, 12:10 UTCJul 3, 20:10 UTC8h 0m
2026-07-03 DAL58 BOS → LHR Jul 3, 03:39 UTCJul 3, 09:22 UTC5h 43m
2026-07-03 DAL58 - Jul 3, 03:40 UTCJul 3, 04:55 UTC1h 15m
2026-07-02 DAL241 ATH → BOS Jul 2, 10:30 UTCJul 2, 20:10 UTC9h 40m
2026-07-01 DAL222 - Jul 1, 21:30 UTCJul 2, 00:35 UTC3h 5m
2026-07-01 DAL222 ATL → ATH Jul 1, 21:27 UTCJul 2, 07:48 UTC10h 21m
2026-07-01 DAL177 DUB → ATL Jul 1, 10:21 UTCJul 1, 18:38 UTC8h 17m
2026-07-01 DAL177 - Jul 1, 10:25 UTCJul 1, 11:00 UTC35m
2026-07-01 DAL176 - Jul 1, 00:00 UTCJul 1, 03:15 UTC3h 15m
2026-06-30 DAL176 ATL → DUB Jun 30, 23:58 UTCJul 1, 07:11 UTC7h 13m
2026-06-30 DAL297 SPN → NRT Jun 30, 09:35 UTCJun 30, 20:45 UTC11h 10m
2026-06-30 DAL297 SPN → NRT Jun 30, 09:35 UTCJun 30, 13:30 UTC3h 55m
2026-06-29 DAL296 HND → ATL Jun 29, 20:19 UTCJun 30, 06:25 UTC10h 5m
2026-06-28 DAL9909 VCE → JFK Jun 28, 10:30 UTCJun 28, 19:04 UTC8h 35m
2026-06-28 DAL9909 LHR → ATL Jun 28, 10:26 UTCJun 28, 19:03 UTC8h 37m
2026-06-26 DAL9910 HNL → DTW Jun 26, 23:21 UTCJun 27, 06:46 UTC7h 25m
2026-06-26 DAL9910 HNL → DTW Jun 26, 23:25 UTCJun 27, 02:04 UTC2h 40m
2026-06-26 DAL9970 ATL → MSP Jun 26, 18:54 UTCJun 26, 21:10 UTC2h 15m
2026-06-26 DAL9970 ATL → MSP Jun 26, 18:50 UTCJun 26, 21:06 UTC2h 16m
2026-06-25 DAL67 FCO → ATL Jun 25, 11:39 UTCJun 25, 21:59 UTC10h 20m
2026-06-24 DAL66 - Jun 24, 23:14 UTCJun 25, 02:10 UTC2h 55m
2026-06-24 DAL66 ATL → FCO Jun 24, 23:12 UTCJun 25, 08:20 UTC9h 8m
2026-06-23 DAL67 FCO → ATL Jun 23, 14:25 UTCJun 23, 17:09 UTC2h 45m
2026-06-23 DAL67 FCO → ATL Jun 23, 14:24 UTCJun 24, 00:52 UTC10h 28m
2026-06-23 DAL66 ATL → FCO Jun 23, 01:20 UTCJun 23, 10:39 UTC9h 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 N413DX page for operator, model, and routing details .

Mode-S A4DFA6 frequently asked

What is Mode-S code A4DFA6?
A4DFA6 is an ICAO 24-bit transponder address. Allocated to United States. Assigned to N413DX.
Where is Mode-S A4DFA6 registered?
Mode-S code A4DFA6 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 A4DFA6 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 A4DFA6, octal 51157646, decimal 10,805,158.
What flights does A4DFA6 operate?
Mode-S A4DFA6 has broadcast 20 distinct callsigns, including DAL215, DAL214, DAL71, DAL241, DAL101.