Apparatus

Try JFK, AAL1290, BAW, or N225AN.

sensors Mode-S transponder

A6946B

ICAO 24-bit transponder address · allocated to United States

Currently assigned to N523DN · operated by DELTA AIR LINES INC

Hex
A6946B
Octal
51512153
Decimal
10,916,971
Country
US
Tail
N523DN
Type
A359
No current signal · last broadcast 3h ago
Flights observed
105
Distinct callsigns
20
Country
US
Last broadcast
3h ago

Last known position

Most recent position reported by Mode-S A6946B.

Country allocation

The ICAO 24-bit address A6946B 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
DAL40 Delta Air Lines 9 2026-05-21
DAL500 Delta Air Lines 8 2026-05-06
DAL41 Delta Air Lines 8 2026-05-21
DAL27 Delta Air Lines 7 2026-05-28
DAL159 Delta Air Lines 6 2026-05-29
DAL12 Delta Air Lines 6 2026-05-20
DAL11 Delta Air Lines 6 2026-05-19
DAL26 Delta Air Lines 5 2026-04-15
DAL327 Delta Air Lines 4 2026-05-23
DAL290 Delta Air Lines 4 2026-05-18
DAL210 Delta Air Lines 4 2026-05-26
DAL158 Delta Air Lines 4 2026-05-29
DAL291 Delta Air Lines 3 2026-05-18
DAL211 Delta Air Lines 3 2026-05-26
DAL201 Delta Air Lines 3 2026-05-13
DAL8 Delta Air Lines 2 2026-05-17
DAL7 Delta Air Lines 2 2026-04-25
DAL200 Delta Air Lines 2 2026-05-13
DAL188 Delta Air Lines 2 2026-05-25
DAL170 Delta Air Lines 2 2026-04-28

Recent flights last 50

DateFlightRouteTakeoffLandingDuration
2026-05-29 DAL159 DTW → ICN May 29, 18:05 UTCMay 30, 00:30 UTC6h 25m
2026-05-29 DAL159 DTW → ICN May 29, 18:01 UTCMay 30, 08:14 UTC14h 13m
2026-05-29 DAL158 ICN → DTW May 29, 01:40 UTCMay 29, 14:40 UTC13h 0m
2026-05-28 DAL27 ATL → ICN May 28, 03:55 UTCMay 28, 18:20 UTC14h 25m
2026-05-26 DAL211 PRG → JFK May 26, 18:24 UTCMay 27, 09:50 UTC15h 25m
2026-05-26 DAL210 JFK → PRG May 26, 01:58 UTCMay 26, 16:01 UTC14h 3m
2026-05-26 DAL210 JFK → PRG May 26, 02:00 UTCMay 26, 02:49 UTC50m
2026-05-25 DAL188 ICN → ATL May 25, 08:40 UTCMay 25, 22:44 UTC14h 4m
2026-05-25 DAL188 ICN → ATL May 25, 08:36 UTCMay 25, 22:47 UTC14h 11m
2026-05-24 DAL189 ATL → ICN May 24, 14:00 UTCMay 25, 06:20 UTC16h 20m
2026-05-23 DAL327 ATL → BOS May 23, 16:55 UTCMay 23, 20:40 UTC3h 46m
2026-05-23 DAL327 ATL → BOS May 23, 16:53 UTCMay 23, 20:47 UTC3h 54m
2026-05-21 DAL40 SYD → LAX May 21, 23:25 UTCMay 22, 12:10 UTC12h 45m
2026-05-21 DAL41 LAX → SYD May 21, 06:00 UTCMay 21, 20:30 UTC14h 30m
2026-05-20 DAL12 ATL → SEA May 20, 00:55 UTCMay 20, 02:45 UTC1h 50m
2026-05-20 DAL12 ATL → SEA May 20, 00:51 UTCMay 20, 14:11 UTC13h 20m
2026-05-19 DAL12 ATL → SEA May 19, 22:25 UTCMay 19, 22:30 UTC5m
2026-05-19 DAL11 LHR → MSP May 19, 06:45 UTCMay 19, 12:00 UTC5h 15m
2026-05-19 DAL11 LHR → MSP May 19, 06:40 UTCMay 19, 22:08 UTC15h 28m
2026-05-18 DAL291 GUM → KIX May 18, 14:35 UTCMay 19, 01:45 UTC11h 9m
2026-05-18 DAL290 LAX → CDG May 18, 01:15 UTCMay 18, 11:05 UTC9h 50m
2026-05-18 DAL290 LAX → CDG May 18, 01:11 UTCMay 18, 10:57 UTC9h 46m
2026-05-17 DAL8 HND → LAX May 17, 08:05 UTCMay 17, 08:45 UTC40m
2026-05-17 DAL8 HND → LAX May 17, 08:03 UTCMay 17, 17:10 UTC9h 7m
2026-05-16 DAL295 ATL → HND May 16, 15:31 UTCMay 17, 05:10 UTC13h 40m
2026-05-16 DAL211 PRG → JFK May 16, 08:01 UTCMay 16, 09:06 UTC1h 5m
2026-05-15 DAL211 PRG → JFK May 15, 18:20 UTCMay 15, 18:35 UTC15m
2026-05-15 DAL210 JFK → PRG May 15, 01:41 UTCMay 15, 16:02 UTC14h 21m
2026-05-15 DAL210 JFK → PRG May 15, 01:45 UTCMay 15, 02:30 UTC45m
2026-05-13 DAL201 JNB → ATL May 13, 20:40 UTCMay 14, 12:55 UTC16h 15m
2026-05-13 DAL200 ATL → JNB May 13, 03:10 UTCMay 13, 17:35 UTC14h 25m
2026-05-12 DAL327 ATL → BOS May 12, 17:05 UTCMay 12, 20:50 UTC3h 45m
2026-05-12 DAL40 SYD → LAX May 12, 11:30 UTCMay 12, 12:15 UTC45m
2026-05-11 DAL41 LAX → SYD May 11, 06:20 UTCMay 11, 21:01 UTC14h 41m
2026-05-11 DAL41 LAX → SYD May 11, 06:20 UTCMay 11, 21:15 UTC14h 55m
2026-05-10 DAL763 ATL → LGA May 10, 23:29 UTCMay 11, 03:45 UTC4h 15m
2026-05-10 DAL327 ATL → BOS May 10, 16:59 UTCMay 10, 20:45 UTC3h 45m
2026-05-10 DAL12 ATL → SEA May 10, 01:00 UTCMay 10, 02:39 UTC1h 40m
2026-05-10 DAL12 ATL → SEA May 10, 00:58 UTCMay 10, 14:43 UTC13h 45m
2026-05-09 DAL11 LHR → MSP May 9, 06:05 UTCMay 9, 21:19 UTC15h 15m
2026-05-08 DAL40 SYD → LAX May 8, 00:37 UTCMay 8, 13:42 UTC13h 5m
2026-05-08 DAL40 SYD → LAX May 8, 00:40 UTCMay 8, 01:09 UTC30m
2026-05-07 DAL41 LAX → SYD May 7, 07:25 UTCMay 7, 21:55 UTC14h 30m
2026-05-06 DAL500 SLC → SEA May 6, 23:49 UTCMay 7, 04:40 UTC4h 51m
2026-05-06 DAL500 SLC → SEA May 6, 23:50 UTCMay 7, 04:45 UTC4h 55m
2026-05-05 DAL1502 AUS → BOS May 5, 16:35 UTCMay 5, 19:55 UTC3h 20m
2026-05-04 DAL500 SLC → SEA May 4, 23:19 UTCMay 5, 03:42 UTC4h 23m
2026-05-04 DAL500 SLC → SEA May 4, 23:20 UTCMay 5, 04:00 UTC4h 40m
2026-05-03 DAL201 JNB → ATL May 3, 20:10 UTCMay 3, 20:35 UTC25m
2026-05-03 DAL201 JNB → ATL May 3, 20:06 UTCMay 4, 12:26 UTC16h 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 N523DN page for operator, model, and routing details .

Mode-S A6946B frequently asked

What is Mode-S code A6946B?
A6946B is an ICAO 24-bit transponder address. Allocated to United States. Assigned to N523DN.
Where is Mode-S A6946B registered?
Mode-S code A6946B 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 A6946B broadcasting right now?
No active broadcast right now. Last signal was 3h ago.
Hex, octal, and decimal Mode-S codes: what's the difference?
The same 24-bit identifier expressed in different bases: hex A6946B, octal 51512153, decimal 10,916,971.
What flights does A6946B operate?
Mode-S A6946B has broadcast 20 distinct callsigns, including DAL40, DAL500, DAL41, DAL27, DAL159.