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
Broadcasting now · callsign DAL48 · 37,000 ft
Flights observed
279
Distinct callsigns
20
Country
US
Last broadcast
Jul 26, 19:00 UTC

Current position

A4DFA6 is currently broadcasting. Map zoomed to live position.

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
DAL241 Delta Air Lines 12 2026-07-22
DAL215 - 12 2026-07-16
DAL214 - 12 2026-07-15
DAL222 Delta Air Lines 11 2026-07-21
DAL71 Delta Air Lines 10 2026-05-20
DAL101 - 10 2026-07-11
DAL81 Delta Air Lines 8 2026-05-15
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
DAL55 - 6 2026-07-14
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
DAL224 Delta Air Lines 5 2026-07-23

Recent flights last 50

DateFlightRouteTakeoffLandingDuration
2026-07-26 DAL979 RDU → SLC Jul 26, 14:10 UTCJul 26, 19:00 UTC4h 50m
2026-07-26 DAL979 RDU → SLC Jul 26, 14:08 UTCJul 26, 18:52 UTC4h 44m
2026-07-26 DAL752 LGA → TPA Jul 26, 02:05 UTCJul 26, 06:00 UTC3h 55m
2026-07-26 DAL752 LGA → TPA Jul 26, 01:00 UTCJul 26, 02:00 UTC1h 0m
2026-07-25 DAL49 AMS → JFK Jul 25, 13:15 UTCJul 25, 13:30 UTC15m
2026-07-25 DAL49 AMS → JFK Jul 25, 13:14 UTCJul 25, 20:40 UTC7h 26m
2026-07-25 DAL49 AMS → JFK Jul 25, 13:14 UTCJul 25, 20:43 UTC7h 29m
2026-07-25 DAL236 TPA → AMS Jul 25, 01:40 UTCJul 25, 10:05 UTC8h 25m
2026-07-24 DAL237 KEF → DTW Jul 24, 12:55 UTCJul 24, 13:30 UTC35m
2026-07-24 DAL237 KEF → DTW Jul 24, 12:55 UTCJul 24, 22:01 UTC9h 6m
2026-07-23 DAL56 SLC → AMS Jul 23, 22:50 UTCJul 24, 07:50 UTC9h 0m
2026-07-23 DAL221 CDG → SLC Jul 23, 10:00 UTCJul 23, 20:20 UTC10h 20m
2026-07-23 DAL224 SEA → AMS Jul 23, 00:30 UTCJul 23, 06:52 UTC6h 22m
2026-07-23 DAL224 SEA → AMS Jul 23, 00:35 UTCJul 23, 01:50 UTC1h 15m
2026-07-22 DAL241 ATH → BOS Jul 22, 12:00 UTCJul 22, 21:50 UTC9h 50m
2026-07-21 DAL222 ATL → ATH Jul 21, 23:00 UTCJul 22, 01:00 UTC2h 0m
2026-07-21 DAL222 ATL → ATH Jul 21, 22:58 UTCJul 22, 09:20 UTC10h 22m
2026-07-20 DAL9935 DTW → ATL Jul 20, 20:20 UTCJul 20, 21:50 UTC1h 30m
2026-07-20 DAL9935 DTW → ATL Jul 20, 20:15 UTCJul 20, 21:50 UTC1h 35m
2026-07-20 DAL135 - Jul 20, 09:40 UTCJul 20, 11:20 UTC1h 40m
2026-07-20 DAL135 AMS → DTW Jul 20, 09:38 UTCJul 20, 17:27 UTC7h 49m
2026-07-20 DAL135 AMS → DTW Jul 20, 09:38 UTCJul 20, 17:25 UTC7h 47m
2026-07-19 DAL134 DTW → AMS Jul 19, 23:25 UTCJul 20, 01:30 UTC2h 5m
2026-07-19 DAL134 DTW → AMS Jul 19, 23:23 UTCJul 20, 06:46 UTC7h 23m
2026-07-19 DAL137 AMS → DTW Jul 19, 13:00 UTCJul 19, 20:50 UTC7h 50m
2026-07-18 DAL56 SLC → AMS Jul 18, 22:40 UTCJul 19, 07:45 UTC9h 5m
2026-07-18 DAL221 - Jul 18, 09:35 UTCJul 18, 11:20 UTC1h 45m
2026-07-18 DAL221 CDG → SLC Jul 18, 09:34 UTCJul 18, 19:17 UTC9h 43m
2026-07-18 DAL224 BOS → CDG Jul 18, 00:04 UTCJul 18, 06:35 UTC6h 31m
2026-07-17 DAL241 ATH → BOS Jul 17, 11:20 UTCJul 17, 21:05 UTC9h 45m
2026-07-16 DAL222 ATL → ATH Jul 16, 22:19 UTCJul 17, 08:35 UTC10h 15m
2026-07-16 DAL215 FCO → ATL Jul 16, 08:40 UTCJul 16, 18:50 UTC10h 10m
2026-07-15 DAL214 ATL → FCO Jul 15, 20:15 UTCJul 16, 05:25 UTC9h 10m
2026-07-14 DAL55 LOS → ATL Jul 14, 12:54 UTCJul 15, 00:10 UTC11h 16m
2026-07-14 DAL55 - Jul 14, 06:40 UTCJul 15, 00:05 UTC17h 24m
2026-07-13 DAL54 - Jul 13, 23:35 UTCJul 14, 23:30 UTC23h 54m
2026-07-13 DAL54 - Jul 13, 23:15 UTCJul 14, 16:10 UTC16h 55m
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

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?
Yes. Mode-S A4DFA6 is currently airborne.
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 DAL241, DAL215, DAL214, DAL222, DAL71.