Apparatus

Try JFK, AAL1290, BAW, or N225AN.

sensors Mode-S transponder

A4BF95

ICAO 24-bit transponder address · allocated to United States

Currently assigned to N405DX · AIRBUS A-330-900 · operated by BANK OF UTAH TRUSTEE

Hex
A4BF95
Octal
51137625
Decimal
10,796,949
Country
US
Tail
N405DX
Type
A339
No current signal · last broadcast Jul 26, 17:40 UTC
Flights observed
318
Distinct callsigns
20
Country
US
Last broadcast
Jul 26, 17:40 UTC

Last known position

Most recent position reported by Mode-S A4BF95.

Country allocation

The ICAO 24-bit address A4BF95 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
DAL220 - 12 2026-07-12
DAL67 - 11 2026-07-17
DAL223 - 11 2026-06-29
DAL57 - 10 2026-07-12
DAL74 - 9 2026-07-10
DAL256 - 9 2026-07-13
DAL240 Delta Air Lines 9 2026-06-28
DAL225 - 9 2026-07-13
DAL142 Delta Air Lines 9 2026-06-25
DAL75 Delta Air Lines 8 2026-04-17
DAL66 Delta Air Lines 8 2026-07-16
DAL243 - 8 2026-07-10
DAL143 - 8 2026-06-25
DAL59 - 7 2026-07-15
DAL242 - 7 2026-06-24
DAL17 - 7 2026-07-11
DAL108 - 7 2026-07-01
DAL80 Delta Air Lines 6 2026-06-01
DAL62 - 6 2026-07-15
DAL117 Delta Air Lines 6 2026-05-30

Recent flights last 50

DateFlightRouteTakeoffLandingDuration
2026-07-26 DAL203 ATH → JFK Jul 26, 07:30 UTCJul 26, 17:35 UTC10h 5m
2026-07-25 DAL202 JFK → ATH Jul 25, 19:30 UTCJul 25, 21:05 UTC1h 35m
2026-07-25 DAL202 JFK → ATH Jul 25, 19:26 UTCJul 26, 03:57 UTC8h 31m
2026-07-25 DAL273 LIS → JFK Jul 25, 09:25 UTCJul 25, 16:10 UTC6h 45m
2026-07-25 DAL272 JFK → LIS Jul 25, 00:36 UTCJul 25, 07:03 UTC6h 27m
2026-07-25 DAL272 JFK → LIS Jul 25, 00:40 UTCJul 25, 06:55 UTC6h 15m
2026-07-24 DAL203 ATH → JFK Jul 24, 07:20 UTCJul 24, 17:05 UTC9h 45m
2026-07-23 DAL202 JFK → ATH Jul 23, 19:55 UTCJul 24, 04:25 UTC8h 30m
2026-07-22 DAL226 GRU → JFK Jul 22, 23:55 UTCJul 23, 09:15 UTC9h 20m
2026-07-22 DAL226 GRU → JFK Jul 22, 23:50 UTCJul 23, 09:10 UTC9h 20m
2026-07-22 DAL227 JFK → GRU Jul 22, 10:20 UTCJul 22, 14:20 UTC4h 0m
2026-07-22 DAL227 JFK → GRU Jul 22, 05:10 UTCJul 22, 05:25 UTC15m
2026-07-21 DAL49 - Jul 21, 13:00 UTCJul 21, 14:45 UTC1h 45m
2026-07-21 DAL49 AMS → JFK Jul 21, 13:00 UTCJul 21, 20:42 UTC7h 42m
2026-07-20 DAL56 SLC → AMS Jul 20, 22:55 UTCJul 21, 07:55 UTC8h 59m
2026-07-20 DAL221 CDG → SLC Jul 20, 09:30 UTCJul 20, 11:10 UTC1h 40m
2026-07-20 DAL221 CDG → SLC Jul 20, 09:26 UTCJul 20, 19:31 UTC10h 5m
2026-07-19 DAL224 SEA → AMS Jul 19, 23:55 UTCJul 20, 06:15 UTC6h 20m
2026-07-19 DAL241 ATH → BOS Jul 19, 10:51 UTCJul 19, 20:42 UTC9h 51m
2026-07-19 DAL241 ATH → BOS Jul 19, 10:55 UTCJul 19, 15:05 UTC4h 10m
2026-07-18 DAL222 ATL → ATH Jul 18, 21:40 UTCJul 18, 23:45 UTC2h 5m
2026-07-18 DAL222 ATL → ATH Jul 18, 21:39 UTCJul 19, 08:17 UTC10h 38m
2026-07-17 DAL67 - Jul 17, 22:00 UTCJul 17, 22:10 UTC10m
2026-07-17 DAL67 - Jul 17, 11:45 UTCJul 17, 22:10 UTC10h 25m
2026-07-17 DAL67 FCO → ATL Jul 17, 11:41 UTCJul 17, 21:41 UTC10h 0m
2026-07-16 DAL66 ATL → FCO Jul 16, 23:44 UTCJul 17, 08:54 UTC9h 10m
2026-07-16 DAL109 - Jul 16, 08:05 UTCJul 16, 16:44 UTC8h 40m
2026-07-15 DAL62 BOS → MAD Jul 15, 22:05 UTCJul 16, 04:25 UTC6h 20m
2026-07-15 DAL59 - Jul 15, 09:00 UTCJul 15, 15:35 UTC6h 35m
2026-07-15 DAL59 LHR → BOS Jul 15, 08:56 UTCJul 15, 15:34 UTC6h 38m
2026-07-14 DAL16 - Jul 14, 23:00 UTCJul 15, 05:55 UTC6h 55m
2026-07-14 DAL133 - Jul 14, 08:15 UTCJul 14, 15:50 UTC7h 35m
2026-07-13 DAL256 BOS → AMS Jul 13, 20:54 UTCJul 14, 03:19 UTC6h 25m
2026-07-13 DAL256 - Jul 13, 20:55 UTCJul 13, 22:05 UTC1h 10m
2026-07-13 DAL225 - Jul 13, 10:15 UTCJul 13, 17:10 UTC6h 55m
2026-07-12 DAL220 - Jul 12, 22:00 UTCJul 13, 07:15 UTC9h 15m
2026-07-12 DAL57 - Jul 12, 09:30 UTCJul 12, 19:15 UTC9h 45m
2026-07-11 DAL132 - Jul 11, 20:35 UTCJul 11, 22:40 UTC2h 5m
2026-07-11 DAL132 DTW → AMS Jul 11, 20:35 UTCJul 12, 03:48 UTC7h 13m
2026-07-11 DAL17 - Jul 11, 10:00 UTCJul 11, 11:20 UTC1h 20m
2026-07-11 DAL17 LHR → DTW Jul 11, 09:58 UTCJul 11, 17:40 UTC7h 42m
2026-07-11 DAL17 LHR → DTW Jul 11, 09:58 UTCJul 11, 17:36 UTC7h 38m
2026-07-10 DAL58 - Jul 10, 23:25 UTCJul 11, 05:25 UTC6h 0m
2026-07-10 DAL243 AMS → BOS Jul 10, 10:45 UTCJul 10, 18:10 UTC7h 25m
2026-07-10 DAL74 ATL → AMS Jul 10, 00:20 UTCJul 10, 08:15 UTC7h 55m
2026-07-09 DAL109 MAD → ATL Jul 9, 08:10 UTCJul 9, 17:05 UTC8h 55m
2026-07-08 DAL62 BOS → MAD Jul 8, 21:53 UTCJul 9, 04:33 UTC6h 40m
2026-07-08 DAL62 - Jul 8, 21:55 UTCJul 9, 04:20 UTC6h 25m
2026-07-08 DAL125 LIS → BOS Jul 8, 12:55 UTCJul 8, 19:15 UTC6h 20m
2026-07-08 DAL124 BOS → LIS Jul 8, 04:45 UTCJul 8, 10:35 UTC5h 50m

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 N405DX page for operator, model, and routing details .

Mode-S A4BF95 frequently asked

What is Mode-S code A4BF95?
A4BF95 is an ICAO 24-bit transponder address. Allocated to United States. Assigned to N405DX.
Where is Mode-S A4BF95 registered?
Mode-S code A4BF95 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 A4BF95 broadcasting right now?
No active broadcast right now. Last signal was Jul 26, 17:40 UTC.
Hex, octal, and decimal Mode-S codes: what's the difference?
The same 24-bit identifier expressed in different bases: hex A4BF95, octal 51137625, decimal 10,796,949.
What flights does A4BF95 operate?
Mode-S A4BF95 has broadcast 20 distinct callsigns, including DAL220, DAL67, DAL223, DAL57, DAL74.