Apparatus

Try JFK, AAL1290, BAW, or N225AN.

sensors Mode-S transponder

A6F5FC

ICAO 24-bit transponder address · allocated to United States

Currently assigned to N548DN · AIRBUS A-321neo · operated by DELTA AIR LINES INC

Hex
A6F5FC
Octal
51572774
Decimal
10,941,948
Country
US
Tail
N548DN
Type
A21N
No current signal · last broadcast 2h ago
Flights observed
376
Distinct callsigns
20
Country
US
Last broadcast
2h ago

Last known position

Most recent position reported by Mode-S A6F5FC.

Country allocation

The ICAO 24-bit address A6F5FC 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
DAL311 - 15 2026-06-19
DAL422 - 12 2026-06-27
DAL443 - 11 2026-07-07
DAL486 - 8 2026-06-19
DAL1698 - 7 2026-06-29
DAL1655 - 7 2026-07-11
DAL485 - 6 2026-07-03
DAL351 - 6 2026-07-14
DAL2008 Delta Air Lines 6 2026-05-18
DAL1715 Delta Air Lines 6 2026-04-28
DAL1142 - 6 2026-06-24
DAL875 Delta Air Lines 5 2026-04-21
DAL447 Delta Air Lines 5 2026-05-18
DAL384 - 5 2026-07-02
DAL359 - 5 2026-07-04
DAL2359 Delta Air Lines 5 2026-05-17
DAL2049 Delta Air Lines 5 2026-05-29
DAL2031 Delta Air Lines 5 2026-05-28
DAL1219 - 5 2026-07-12
DAL1210 - 5 2026-07-12

Recent flights last 50

DateFlightRouteTakeoffLandingDuration
2026-07-14 DAL351 - Jul 14, 15:55 UTCJul 14, 16:55 UTC1h 0m
2026-07-14 DAL375 - Jul 14, 12:35 UTCJul 14, 13:25 UTC50m
2026-07-14 DAL375 - Jul 14, 08:10 UTCJul 14, 08:20 UTC10m
2026-07-13 DAL428 - Jul 13, 22:40 UTCJul 14, 03:45 UTC5h 5m
2026-07-13 DAL634 ARB → LAX Jul 13, 17:20 UTCJul 13, 21:20 UTC4h 0m
2026-07-13 DAL2845 MCO → DTW Jul 13, 13:15 UTCJul 13, 15:25 UTC2h 10m
2026-07-13 DAL718 LAX → MCO Jul 13, 01:45 UTCJul 13, 06:20 UTC4h 35m
2026-07-12 DAL1219 - Jul 12, 20:15 UTCJul 13, 00:20 UTC4h 5m
2026-07-12 DAL897 SLC → ATL Jul 12, 14:20 UTCJul 12, 17:35 UTC3h 15m
2026-07-12 DAL1210 SAN → SLC Jul 12, 00:10 UTCJul 12, 01:40 UTC1h 30m
2026-07-12 DAL1210 SAN → SLC Jul 12, 00:09 UTCJul 12, 01:35 UTC1h 26m
2026-07-11 DAL1210 SLC → SAN Jul 11, 21:10 UTCJul 11, 22:40 UTC1h 30m
2026-07-11 DAL663 ATL → SLC Jul 11, 16:10 UTCJul 11, 19:30 UTC3h 20m
2026-07-11 DAL923 BOS → ATL Jul 11, 12:20 UTCJul 11, 14:30 UTC2h 10m
2026-07-11 DAL1655 - Jul 11, 05:35 UTCJul 11, 10:35 UTC5h 0m
2026-07-11 DAL1655 SFO → BOS Jul 11, 05:33 UTCJul 11, 10:47 UTC5h 14m
2026-07-10 DAL1655 BOS → SFO Jul 10, 21:45 UTCJul 11, 04:01 UTC6h 15m
2026-07-10 DAL400 - Jul 10, 14:35 UTCJul 10, 19:50 UTC5h 15m
2026-07-10 DAL2919 BOS → SFO Jul 10, 01:25 UTCJul 10, 07:30 UTC6h 5m
2026-07-09 DAL438 SEA → BOS Jul 9, 18:30 UTCJul 9, 23:15 UTC4h 45m
2026-07-09 DAL438 SEA → BOS Jul 9, 18:27 UTCJul 9, 23:11 UTC4h 44m
2026-07-09 DAL699 JFK → SEA Jul 9, 11:20 UTCJul 9, 16:50 UTC5h 30m
2026-07-09 DAL671 SLC → JFK Jul 9, 01:15 UTCJul 9, 05:10 UTC3h 55m
2026-07-08 DAL1120 JFK → RSW Jul 8, 21:45 UTCJul 8, 23:10 UTC1h 25m
2026-07-08 DAL347 MCO → SEA Jul 8, 14:35 UTCJul 8, 19:50 UTC5h 15m
2026-07-08 DAL448 SEA → MCO Jul 8, 08:05 UTCJul 8, 13:00 UTC4h 55m
2026-07-08 DAL328 MCO → SEA Jul 8, 00:40 UTCJul 8, 06:10 UTC5h 30m
2026-07-07 DAL328 SEA → MCO Jul 7, 16:30 UTCJul 7, 21:45 UTC5h 15m
2026-07-07 DAL440 ATL → SFO Jul 7, 13:35 UTCJul 7, 14:25 UTC50m
2026-07-07 DAL443 - Jul 7, 01:50 UTCJul 7, 07:10 UTC5h 20m
2026-07-06 DAL1219 ATL → LAX Jul 6, 20:05 UTCJul 7, 00:00 UTC3h 55m
2026-07-06 DAL515 - Jul 6, 14:25 UTCJul 6, 18:25 UTC4h 0m
2026-07-06 DAL515 LAX → ATL Jul 6, 14:22 UTCJul 6, 18:14 UTC3h 52m
2026-07-05 DAL1219 ATL → LAX Jul 5, 19:55 UTCJul 6, 00:35 UTC4h 40m
2026-07-05 DAL897 SJC → ATL Jul 5, 14:40 UTCJul 5, 18:20 UTC3h 40m
2026-07-05 DAL2223 ANC → SLC Jul 5, 08:50 UTCJul 5, 12:55 UTC4h 5m
2026-07-05 DAL2713 SLC → ANC Jul 5, 02:45 UTCJul 5, 07:20 UTC4h 35m
2026-07-05 DAL2713 SLC → ANC Jul 5, 02:45 UTCJul 5, 07:14 UTC4h 29m
2026-07-04 DAL1120 JFK → RSW Jul 4, 20:53 UTCJul 4, 22:23 UTC1h 30m
2026-07-04 DAL347 MCO → SEA Jul 4, 13:25 UTCJul 4, 18:55 UTC5h 30m
2026-07-04 DAL448 SEA → MCO Jul 4, 06:50 UTCJul 4, 11:40 UTC4h 50m
2026-07-04 DAL359 - Jul 4, 03:55 UTCJul 4, 04:50 UTC55m
2026-07-03 DAL359 - Jul 3, 23:25 UTCJul 3, 23:35 UTC10m
2026-07-03 DAL351 - Jul 3, 21:10 UTCJul 3, 21:25 UTC15m
2026-07-03 DAL351 SEA → HNL Jul 3, 15:49 UTCJul 3, 21:22 UTC5h 33m
2026-07-03 DAL351 - Jul 3, 15:50 UTCJul 3, 16:40 UTC50m
2026-07-03 DAL485 - Jul 3, 06:55 UTCJul 3, 07:20 UTC25m
2026-07-03 DAL485 KOA → SEA Jul 3, 06:55 UTCJul 3, 12:30 UTC5h 35m
2026-07-03 DAL340 BOS → SEA Jul 3, 03:10 UTCJul 3, 03:30 UTC20m
2026-07-02 DAL340 BOS → SEA Jul 2, 22:05 UTCJul 2, 22:50 UTC45m

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 N548DN page for operator, model, and routing details .

Mode-S A6F5FC frequently asked

What is Mode-S code A6F5FC?
A6F5FC is an ICAO 24-bit transponder address. Allocated to United States. Assigned to N548DN.
Where is Mode-S A6F5FC registered?
Mode-S code A6F5FC 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 A6F5FC broadcasting right now?
No active broadcast right now. Last signal was 2h ago.
Hex, octal, and decimal Mode-S codes: what's the difference?
The same 24-bit identifier expressed in different bases: hex A6F5FC, octal 51572774, decimal 10,941,948.
What flights does A6F5FC operate?
Mode-S A6F5FC has broadcast 20 distinct callsigns, including DAL311, DAL422, DAL443, DAL486, DAL1698.