Apparatus

Try JFK, AAL1290, BAW, or N225AN.

sensors Mode-S transponder

A68CFD

ICAO 24-bit transponder address · allocated to United States

Currently assigned to N521DN · AIRBUS A-350-900 · operated by DELTA AIR LINES INC

Hex
A68CFD
Octal
51506375
Decimal
10,915,069
Country
US
Tail
N521DN
Type
A359
No current signal · last broadcast Jul 26, 21:15 UTC
Flights observed
222
Distinct callsigns
20
Country
US
Last broadcast
Jul 26, 21:15 UTC

Last known position

Most recent position reported by Mode-S A68CFD.

Country allocation

The ICAO 24-bit address A68CFD 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 Delta Air Lines 17 2026-07-20
DAL159 Delta Air Lines 16 2026-07-24
DAL27 Delta Air Lines 13 2026-07-23
DAL200 Delta Air Lines 13 2026-07-20
DAL188 Delta Air Lines 13 2026-07-22
DAL26 - 12 2026-07-17
DAL189 Delta Air Lines 12 2026-07-21
DAL158 Delta Air Lines 12 2026-07-24
DAL40 - 10 2026-06-15
DAL172 Delta Air Lines 10 2026-07-25
DAL173 Delta Air Lines 9 2026-07-26
DAL327 - 7 2026-07-12
DAL12 - 7 2026-07-12
DAL763 - 6 2026-07-11
DAL41 - 6 2026-06-15
DAL299 - 6 2026-07-02
DAL211 - 6 2026-07-05
DAL1502 Delta Air Lines 6 2026-04-25
DAL11 - 6 2026-07-11
DAL39 Delta Air Lines 5 2026-05-18

Recent flights last 50

DateFlightRouteTakeoffLandingDuration
2026-07-26 DAL173 MXP → JFK Jul 26, 18:35 UTCJul 26, 21:15 UTC2h 40m
2026-07-25 DAL172 MNL → JFK Jul 25, 10:30 UTCJul 25, 21:15 UTC10h 45m
2026-07-25 DAL172 MNL → JFK Jul 25, 10:27 UTCJul 25, 21:38 UTC11h 11m
2026-07-24 DAL159 DTW → ICN Jul 24, 16:53 UTCJul 25, 07:30 UTC14h 37m
2026-07-24 DAL159 DTW → ICN Jul 24, 16:55 UTCJul 25, 07:30 UTC14h 35m
2026-07-24 DAL158 ICN → DTW Jul 24, 01:40 UTCJul 24, 14:00 UTC12h 20m
2026-07-23 DAL27 ATL → ICN Jul 23, 03:55 UTCJul 23, 18:40 UTC14h 45m
2026-07-22 DAL188 ICN → ATL Jul 22, 07:38 UTCJul 22, 20:55 UTC13h 17m
2026-07-22 DAL188 ICN → ATL Jul 22, 07:38 UTCJul 22, 20:55 UTC13h 17m
2026-07-21 DAL189 ATL → ICN Jul 21, 14:15 UTCJul 22, 05:15 UTC15h 0m
2026-07-21 DAL189 ATL → ICN Jul 21, 14:10 UTCJul 22, 05:16 UTC15h 6m
2026-07-20 DAL201 JNB → ATL Jul 20, 20:30 UTCJul 20, 20:55 UTC25m
2026-07-20 DAL201 JNB → ATL Jul 20, 20:25 UTCJul 21, 12:02 UTC15h 37m
2026-07-20 DAL201 JNB → ATL Jul 20, 20:25 UTCJul 21, 12:01 UTC15h 36m
2026-07-20 DAL200 ATL → JNB Jul 20, 03:10 UTCJul 20, 17:50 UTC14h 40m
2026-07-18 DAL201 JNB → ATL Jul 18, 20:08 UTCJul 19, 11:16 UTC15h 8m
2026-07-18 DAL201 JNB → ATL Jul 18, 20:10 UTCJul 19, 11:15 UTC15h 5m
2026-07-18 DAL201 JNB → ATL Jul 18, 20:08 UTCJul 19, 11:18 UTC15h 10m
2026-07-18 DAL200 ATL → JNB Jul 18, 02:29 UTCJul 18, 17:25 UTC14h 56m
2026-07-18 DAL200 ATL → JNB Jul 18, 02:29 UTCJul 18, 17:24 UTC14h 55m
2026-07-17 DAL26 ICN → ATL Jul 17, 10:00 UTCJul 17, 23:45 UTC13h 45m
2026-07-17 DAL26 ICN → ATL Jul 17, 10:00 UTCJul 17, 23:48 UTC13h 48m
2026-07-16 DAL173 - Jul 16, 18:15 UTCJul 16, 20:00 UTC1h 45m
2026-07-16 DAL173 SLC → ICN Jul 16, 18:11 UTCJul 17, 06:20 UTC12h 9m
2026-07-15 DAL172 ICN → SLC Jul 15, 10:35 UTCJul 15, 21:45 UTC11h 10m
2026-07-14 DAL159 - Jul 14, 17:20 UTCJul 15, 07:35 UTC14h 14m
2026-07-14 DAL158 ICN → DTW Jul 14, 01:40 UTCJul 14, 14:00 UTC12h 20m
2026-07-13 DAL27 ATL → ICN Jul 13, 05:10 UTCJul 13, 19:15 UTC14h 5m
2026-07-12 DAL327 LAX → ATL Jul 12, 17:10 UTCJul 12, 21:00 UTC3h 50m
2026-07-12 DAL12 - Jul 12, 00:20 UTCJul 12, 13:50 UTC13h 30m
2026-07-11 DAL11 - Jul 11, 06:50 UTCJul 11, 21:50 UTC15h 0m
2026-07-11 DAL763 - Jul 11, 00:00 UTCJul 11, 03:50 UTC3h 50m
2026-07-10 DAL782 SLC → BOS Jul 10, 15:35 UTCJul 10, 19:15 UTC3h 40m
2026-07-10 DAL782 SLC → BOS Jul 10, 15:34 UTCJul 10, 19:41 UTC4h 7m
2026-07-10 DAL763 ATL → LAX Jul 10, 00:10 UTCJul 10, 04:15 UTC4h 5m
2026-07-09 DAL327 LAX → ATL Jul 9, 17:05 UTCJul 9, 21:15 UTC4h 10m
2026-07-09 DAL88 HKG → LAX Jul 9, 01:50 UTCJul 9, 14:50 UTC13h 0m
2026-07-08 DAL89 - Jul 8, 06:35 UTCJul 8, 07:40 UTC1h 5m
2026-07-08 DAL89 LAX → HKG Jul 8, 06:31 UTCJul 8, 20:42 UTC14h 11m
2026-07-08 DAL763 - Jul 8, 00:25 UTCJul 8, 04:10 UTC3h 45m
2026-07-07 DAL188 - Jul 7, 07:35 UTCJul 7, 09:15 UTC1h 40m
2026-07-07 DAL188 ICN → ATL Jul 7, 07:35 UTCJul 7, 20:56 UTC13h 21m
2026-07-07 DAL188 ICN → ATL Jul 7, 07:35 UTCJul 7, 20:50 UTC13h 15m
2026-07-06 DAL189 ATL → ICN Jul 6, 14:10 UTCJul 7, 04:30 UTC14h 20m
2026-07-06 DAL189 ATL → ICN Jul 6, 14:07 UTCJul 7, 04:33 UTC14h 26m
2026-07-05 DAL211 - Jul 5, 18:30 UTCJul 5, 18:55 UTC25m
2026-07-05 DAL211 CPT → ATL Jul 5, 18:30 UTCJul 6, 10:08 UTC15h 38m
2026-07-05 DAL211 CPT → ATL Jul 5, 18:30 UTCJul 6, 10:10 UTC15h 40m
2026-07-05 DAL210 - Jul 5, 02:05 UTCJul 5, 02:50 UTC45m
2026-07-05 DAL210 ATL → CPT Jul 5, 02:03 UTCJul 5, 16:04 UTC14h 1m

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 N521DN page for operator, model, and routing details .

Mode-S A68CFD frequently asked

What is Mode-S code A68CFD?
A68CFD is an ICAO 24-bit transponder address. Allocated to United States. Assigned to N521DN.
Where is Mode-S A68CFD registered?
Mode-S code A68CFD 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 A68CFD broadcasting right now?
No active broadcast right now. Last signal was Jul 26, 21:15 UTC.
Hex, octal, and decimal Mode-S codes: what's the difference?
The same 24-bit identifier expressed in different bases: hex A68CFD, octal 51506375, decimal 10,915,069.
What flights does A68CFD operate?
Mode-S A68CFD has broadcast 20 distinct callsigns, including DAL201, DAL159, DAL27, DAL200, DAL188.