Apparatus

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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
Broadcasting now · callsign DAL2919 · 38,000 ft
Flights observed
433
Distinct callsigns
20
Country
US
Last broadcast
Jul 26, 23:00 UTC

Current position

A6F5FC is currently broadcasting. Map zoomed to live position.

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
DAL443 Delta Air Lines 14 2026-07-19
DAL422 - 12 2026-06-27
DAL486 Delta Air Lines 10 2026-07-24
DAL359 Delta Air Lines 9 2026-07-20
DAL351 Delta Air Lines 9 2026-07-19
DAL1698 - 7 2026-06-29
DAL1655 - 7 2026-07-11
DAL1210 Delta Air Lines 7 2026-07-23
DAL485 - 6 2026-07-03
DAL448 Delta Air Lines 6 2026-07-20
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
DAL440 Delta Air Lines 5 2026-07-19
DAL418 - 5 2026-07-17
DAL384 - 5 2026-07-02
DAL347 - 5 2026-07-15

Recent flights last 50

DateFlightRouteTakeoffLandingDuration
2026-07-26 DAL740 PWM → ATL Jul 26, 21:55 UTCJul 26, 23:00 UTC1h 5m
2026-07-26 DAL451 BOS → DFW Jul 26, 14:15 UTCJul 26, 18:50 UTC4h 35m
2026-07-25 DAL684 JFK → ATL Jul 25, 22:20 UTCJul 26, 03:50 UTC5h 30m
2026-07-25 DAL1792 CVG → ATL Jul 25, 16:24 UTCJul 25, 20:18 UTC3h 54m
2026-07-25 DAL1792 CVG → ATL Jul 25, 16:25 UTCJul 25, 20:20 UTC3h 55m
2026-07-25 DAL3229 FLL → MSP Jul 25, 11:15 UTCJul 25, 14:35 UTC3h 20m
2026-07-25 DAL3229 FLL → MSP Jul 25, 11:10 UTCJul 25, 14:32 UTC3h 22m
2026-07-25 DAL2255 MSP → DTW Jul 25, 02:15 UTCJul 25, 05:05 UTC2h 50m
2026-07-24 DAL526 ATL → SLC Jul 24, 21:00 UTCJul 25, 00:30 UTC3h 30m
2026-07-24 DAL526 ATL → SLC Jul 24, 20:56 UTCJul 25, 00:25 UTC3h 29m
2026-07-24 DAL515 JFK → LAX Jul 24, 14:15 UTCJul 24, 18:55 UTC4h 40m
2026-07-24 DAL486 OGG → SLC Jul 24, 06:54 UTCJul 24, 11:33 UTC4h 39m
2026-07-24 DAL486 OGG → SLC Jul 24, 06:55 UTCJul 24, 07:05 UTC10m
2026-07-24 DAL340 BOS → SEA Jul 24, 03:10 UTCJul 24, 03:25 UTC15m
2026-07-23 DAL340 BOS → SEA Jul 23, 21:54 UTCJul 24, 03:29 UTC5h 35m
2026-07-23 DAL340 BOS → SEA Jul 23, 21:55 UTCJul 23, 22:50 UTC55m
2026-07-23 DAL2995 MSP → BWI Jul 23, 18:10 UTCJul 23, 19:50 UTC1h 40m
2026-07-23 DAL1117 BOS → MSP Jul 23, 13:50 UTCJul 23, 15:15 UTC1h 25m
2026-07-23 DAL1202 DTW → BDL Jul 23, 05:10 UTCJul 23, 06:40 UTC1h 30m
2026-07-23 DAL1202 DTW → BDL Jul 23, 05:09 UTCJul 23, 06:36 UTC1h 27m
2026-07-23 DAL1210 LAX → SFO Jul 23, 00:25 UTCJul 23, 02:00 UTC1h 35m
2026-07-22 DAL1210 LAX → SFO Jul 22, 21:10 UTCJul 22, 22:40 UTC1h 30m
2026-07-22 DAL663 ATL → SLC Jul 22, 16:05 UTCJul 22, 19:30 UTC3h 25m
2026-07-22 DAL663 ATL → SLC Jul 22, 16:03 UTCJul 22, 19:25 UTC3h 22m
2026-07-22 DAL923 ATL → SFO Jul 22, 12:20 UTCJul 22, 14:40 UTC2h 20m
2026-07-21 DAL702 SLC → BOS Jul 21, 23:45 UTCJul 22, 03:35 UTC3h 50m
2026-07-21 DAL1209 PDX → SLC Jul 21, 20:50 UTCJul 21, 22:20 UTC1h 30m
2026-07-21 DAL1209 PDX → SLC Jul 21, 20:46 UTCJul 21, 22:21 UTC1h 35m
2026-07-21 DAL1209 SLC → PDX Jul 21, 17:30 UTCJul 21, 18:55 UTC1h 25m
2026-07-21 DAL3229 FLL → MSP Jul 21, 11:25 UTCJul 21, 14:50 UTC3h 25m
2026-07-20 DAL708 LAX → DTW Jul 20, 23:05 UTCJul 21, 02:55 UTC3h 49m
2026-07-20 DAL634 JFK → LAS Jul 20, 17:20 UTCJul 20, 21:20 UTC4h 0m
2026-07-20 DAL2845 MSP → BDL Jul 20, 13:25 UTCJul 20, 15:35 UTC2h 10m
2026-07-20 DAL448 OGG → LAX Jul 20, 06:45 UTCJul 20, 11:30 UTC4h 45m
2026-07-20 DAL359 PSP → ATL Jul 20, 03:50 UTCJul 20, 04:55 UTC1h 5m
2026-07-19 DAL359 PSP → ATL Jul 19, 23:30 UTCJul 19, 23:45 UTC15m
2026-07-19 DAL351 JFK → LAX Jul 19, 16:05 UTCJul 19, 17:00 UTC55m
2026-07-19 DAL351 JFK → LAX Jul 19, 16:05 UTCJul 19, 21:36 UTC5h 31m
2026-07-19 DAL440 ATL → SFO Jul 19, 13:20 UTCJul 19, 14:15 UTC55m
2026-07-19 DAL440 ATL → SFO Jul 19, 09:00 UTCJul 19, 09:15 UTC15m
2026-07-19 DAL443 ATL → PHL Jul 19, 06:55 UTCJul 19, 07:10 UTC15m
2026-07-19 DAL443 ATL → PHL Jul 19, 01:55 UTCJul 19, 02:55 UTC1h 0m
2026-07-19 DAL443 ATL → PHL Jul 19, 01:52 UTCJul 19, 07:03 UTC5h 11m
2026-07-18 DAL1876 SJD → LAX Jul 18, 21:32 UTCJul 18, 23:33 UTC2h 1m
2026-07-18 DAL1875 - Jul 18, 18:15 UTCJul 18, 23:50 UTC5h 35m
2026-07-18 DAL476 ATL → SLC Jul 18, 12:35 UTCJul 18, 13:10 UTC35m
2026-07-17 DAL418 - Jul 17, 01:35 UTCJul 17, 02:39 UTC1h 5m
2026-07-17 DAL418 LAX → OGG Jul 17, 01:32 UTCJul 17, 06:37 UTC5h 5m
2026-07-16 DAL1876 - Jul 16, 18:10 UTCJul 16, 23:40 UTC5h 30m
2026-07-16 DAL996 ATL → LAX Jul 16, 11:30 UTCJul 16, 15:19 UTC3h 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 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?
Yes. Mode-S A6F5FC is currently airborne.
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, DAL443, DAL422, DAL486, DAL359.