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 Jul 24, 15:40 UTC
Flights observed
218
Distinct callsigns
20
Country
US
Last broadcast
Jul 24, 15:40 UTC

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
DAL201 - 14 2026-07-07
DAL200 - 14 2026-07-07
DAL89 Delta Air Lines 11 2026-07-23
DAL12 Delta Air Lines 11 2026-07-22
DAL88 Delta Air Lines 10 2026-07-24
DAL327 Delta Air Lines 10 2026-07-22
DAL27 - 10 2026-07-02
DAL500 - 9 2026-07-08
DAL40 Delta Air Lines 9 2026-05-21
DAL26 - 9 2026-07-06
DAL211 - 9 2026-06-27
DAL159 - 9 2026-07-03
DAL11 - 9 2026-07-21
DAL41 Delta Air Lines 8 2026-05-21
DAL763 Delta Air Lines 7 2026-07-23
DAL210 - 7 2026-06-26
DAL158 - 7 2026-07-03
DAL290 Delta Air Lines 6 2026-07-20
DAL188 - 6 2026-06-28
DAL189 - 5 2026-06-27

Recent flights last 50

DateFlightRouteTakeoffLandingDuration
2026-07-24 DAL88 ATL → CDG Jul 24, 02:35 UTCJul 24, 15:40 UTC13h 5m
2026-07-23 DAL89 CDG → ATL Jul 23, 06:40 UTCJul 23, 20:20 UTC13h 40m
2026-07-23 DAL763 ATL → LGA Jul 23, 00:15 UTCJul 23, 04:15 UTC4h 0m
2026-07-22 DAL327 ATL → BOS Jul 22, 17:20 UTCJul 22, 21:05 UTC3h 45m
2026-07-22 DAL12 ATL → SEA Jul 22, 00:45 UTCJul 22, 15:00 UTC14h 15m
2026-07-21 DAL11 LAX → MEL Jul 21, 06:35 UTCJul 21, 21:50 UTC15h 15m
2026-07-20 DAL291 GUM → KIX Jul 20, 15:05 UTCJul 21, 01:50 UTC10h 45m
2026-07-20 DAL290 LAX → CDG Jul 20, 01:15 UTCJul 20, 11:25 UTC10h 10m
2026-07-20 DAL290 LAX → CDG Jul 20, 01:12 UTCJul 20, 11:19 UTC10h 7m
2026-07-19 DAL12 - Jul 19, 00:10 UTCJul 19, 14:25 UTC14h 15m
2026-07-19 DAL12 MEL → LAX Jul 19, 00:09 UTCJul 19, 14:17 UTC14h 8m
2026-07-18 DAL11 - Jul 18, 06:40 UTCJul 18, 21:40 UTC15h 0m
2026-07-17 DAL9960 - Jul 17, 15:44 UTCJul 17, 18:00 UTC2h 15m
2026-07-17 DAL68 TPE → SEA Jul 17, 03:25 UTCJul 17, 12:55 UTC9h 30m
2026-07-17 DAL68 TPE → SEA Jul 17, 01:45 UTCJul 17, 01:59 UTC15m
2026-07-16 DAL69 SEA → TPE Jul 16, 00:04 UTCJul 16, 11:52 UTC11h 48m
2026-07-15 DAL9966 - Jul 15, 19:55 UTCJul 15, 21:55 UTC2h 0m
2026-07-15 DAL9966 LAX → SEA Jul 15, 19:53 UTCJul 15, 21:55 UTC2h 2m
2026-07-15 DAL88 HKG → LAX Jul 15, 01:55 UTCJul 15, 15:10 UTC13h 15m
2026-07-14 DAL89 - Jul 14, 07:00 UTCJul 14, 20:40 UTC13h 40m
2026-07-14 DAL89 LAX → HKG Jul 14, 06:56 UTCJul 14, 20:31 UTC13h 35m
2026-07-14 DAL763 - Jul 14, 01:05 UTCJul 14, 04:50 UTC3h 45m
2026-07-13 DAL327 LAX → ATL Jul 13, 17:45 UTCJul 13, 21:35 UTC3h 50m
2026-07-13 DAL88 HKG → LAX Jul 13, 02:01 UTCJul 13, 15:20 UTC13h 20m
2026-07-12 DAL89 - Jul 12, 06:30 UTCJul 12, 20:05 UTC13h 35m
2026-07-12 DAL763 - Jul 12, 00:20 UTCJul 12, 04:01 UTC3h 40m
2026-07-11 DAL327 LAX → ATL Jul 11, 17:50 UTCJul 11, 22:01 UTC4h 10m
2026-07-11 DAL88 - Jul 11, 04:05 UTCJul 11, 15:10 UTC11h 5m
2026-07-11 DAL88 - Jul 11, 01:55 UTCJul 11, 02:10 UTC15m
2026-07-10 DAL89 - Jul 10, 06:40 UTCJul 10, 18:35 UTC11h 55m
2026-07-10 DAL89 LAX → HKG Jul 10, 06:37 UTCJul 10, 21:06 UTC14h 29m
2026-07-08 DAL500 ATL → LAX Jul 8, 22:30 UTCJul 9, 02:25 UTC3h 55m
2026-07-07 DAL201 - Jul 7, 20:10 UTCJul 8, 11:40 UTC15h 30m
2026-07-07 DAL200 - Jul 7, 03:10 UTCJul 7, 04:05 UTC55m
2026-07-07 DAL200 ATL → JNB Jul 7, 03:09 UTCJul 7, 17:50 UTC14h 41m
2026-07-06 DAL26 ICN → ATL Jul 6, 10:05 UTCJul 6, 23:15 UTC13h 10m
2026-07-06 DAL26 ICN → ATL Jul 6, 10:01 UTCJul 6, 23:09 UTC13h 8m
2026-07-05 DAL173 MXP → JFK Jul 5, 18:15 UTCJul 6, 06:15 UTC12h 0m
2026-07-04 DAL172 ICN → SLC Jul 4, 10:30 UTCJul 4, 21:10 UTC10h 40m
2026-07-04 DAL172 ICN → SLC Jul 4, 10:27 UTCJul 4, 21:01 UTC10h 34m
2026-07-03 DAL159 - Jul 3, 17:15 UTCJul 4, 07:30 UTC14h 15m
2026-07-03 DAL158 ICN → DTW Jul 3, 01:40 UTCJul 3, 14:00 UTC12h 20m
2026-07-02 DAL27 ATL → ICN Jul 2, 04:00 UTCJul 2, 18:10 UTC14h 10m
2026-06-30 DAL201 JNB → ATL Jun 30, 20:28 UTCJul 1, 12:20 UTC15h 52m
2026-06-30 DAL201 - Jun 30, 20:30 UTCJul 1, 12:30 UTC16h 0m
2026-06-30 DAL200 ATL → JNB Jun 30, 03:29 UTCJun 30, 17:59 UTC14h 30m
2026-06-30 DAL200 - Jun 30, 03:30 UTCJun 30, 18:05 UTC14h 35m
2026-06-29 DAL299 - Jun 29, 13:39 UTCJun 29, 23:29 UTC9h 50m
2026-06-29 DAL298 ATL → FCO Jun 29, 01:29 UTCJun 29, 10:15 UTC8h 45m
2026-06-28 DAL188 ICN → ATL Jun 28, 07:40 UTCJun 28, 20:39 UTC13h 0m

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 Jul 24, 15:40 UTC.
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 DAL201, DAL200, DAL89, DAL12, DAL88.