Apparatus

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sensors Mode-S transponder

A2CCF1

ICAO 24-bit transponder address · allocated to United States

Currently assigned to N28PK · operated by ALF IX LLC

Hex
A2CCF1
Octal
50546361
Decimal
10,669,297
Country
US
Tail
N28PK
Type
C172
No current signal · last broadcast 16h ago
Flights observed
226
Distinct callsigns
1
Country
US
Last broadcast
16h ago

Last known position

Most recent position reported by Mode-S A2CCF1.

Country allocation

The ICAO 24-bit address A2CCF1 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 1 distinct

Callsign Airline Flights Last seen
N28PK - 226 2026-07-17

Recent flights last 50

DateFlightRouteTakeoffLandingDuration
2026-07-17 N28PK DBQ → DBQ Jul 17, 17:09 UTCJul 17, 19:40 UTC2h 30m
2026-07-17 N28PK DBQ → DBQ Jul 17, 13:05 UTCJul 17, 16:04 UTC3h 0m
2026-07-17 N28PK - Jul 17, 02:10 UTCJul 17, 03:25 UTC1h 15m
2026-07-16 N28PK DBQ → DSM Jul 16, 21:45 UTCJul 16, 23:10 UTC1h 25m
2026-07-16 N28PK - Jul 16, 18:15 UTCJul 16, 21:05 UTC2h 50m
2026-07-16 N28PK - Jul 16, 14:10 UTCJul 16, 15:45 UTC1h 35m
2026-07-15 N28PK DBQ → DBQ Jul 15, 22:25 UTCJul 16, 01:10 UTC2h 45m
2026-07-15 N28PK - Jul 15, 20:50 UTCJul 15, 21:00 UTC10m
2026-07-15 N28PK - Jul 15, 19:55 UTCJul 15, 20:15 UTC20m
2026-07-15 N28PK DBQ → DBQ Jul 15, 17:20 UTCJul 15, 18:40 UTC1h 20m
2026-07-15 N28PK - Jul 15, 14:40 UTCJul 15, 16:00 UTC1h 20m
2026-07-15 N28PK DBQ → DBQ Jul 15, 12:20 UTCJul 15, 13:40 UTC1h 20m
2026-07-14 N28PK DBQ → DBQ Jul 14, 22:35 UTCJul 15, 00:10 UTC1h 34m
2026-07-14 N28PK DBQ → DBQ Jul 14, 20:20 UTCJul 14, 21:20 UTC1h 0m
2026-07-14 N28PK DBQ → DBQ Jul 14, 14:30 UTCJul 14, 15:35 UTC1h 5m
2026-07-14 N28PK DBQ → DBQ Jul 14, 12:45 UTCJul 14, 13:45 UTC1h 0m
2026-07-13 N28PK DBQ → DBQ Jul 13, 21:15 UTCJul 13, 22:20 UTC1h 5m
2026-07-13 N28PK DBQ → DBQ Jul 13, 19:05 UTCJul 13, 20:10 UTC1h 5m
2026-07-13 N28PK DBQ → DBQ Jul 13, 16:40 UTCJul 13, 17:25 UTC45m
2026-07-13 N28PK DBQ → DBQ Jul 13, 15:00 UTCJul 13, 15:50 UTC50m
2026-07-13 N28PK DBQ → DBQ Jul 13, 12:40 UTCJul 13, 13:50 UTC1h 10m
2026-07-11 N28PK GRR → DBQ Jul 11, 23:55 UTCJul 12, 02:30 UTC2h 35m
2026-07-11 N28PK DBQ → GRR Jul 11, 17:20 UTCJul 11, 20:25 UTC3h 5m
2026-07-11 N28PK DBQ → DBQ Jul 11, 12:45 UTCJul 11, 15:45 UTC3h 0m
2026-07-11 N28PK DBQ → DBQ Jul 11, 00:20 UTCJul 11, 00:25 UTC5m
2026-07-10 N28PK - Jul 10, 23:55 UTCJul 11, 00:00 UTC5m
2026-07-10 N28PK DBQ → DBQ Jul 10, 23:25 UTCJul 10, 23:35 UTC10m
2026-07-10 N28PK DBQ → DBQ Jul 10, 19:00 UTCJul 10, 21:25 UTC2h 26m
2026-07-10 N28PK DBQ → DBQ Jul 10, 16:55 UTCJul 10, 17:55 UTC1h 0m
2026-07-09 N28PK DBQ → DBQ Jul 9, 21:25 UTCJul 9, 22:45 UTC1h 20m
2026-07-09 N28PK DBQ → DBQ Jul 9, 18:45 UTCJul 9, 19:50 UTC1h 5m
2026-07-09 N28PK DBQ → DBQ Jul 9, 16:15 UTCJul 9, 17:05 UTC50m
2026-07-09 N28PK DBQ → DBQ Jul 9, 14:20 UTCJul 9, 14:50 UTC30m
2026-07-08 N28PK DBQ → DBQ Jul 8, 23:20 UTCJul 9, 00:15 UTC55m
2026-07-08 N28PK DBQ → DBQ Jul 8, 21:20 UTCJul 8, 22:25 UTC1h 5m
2026-07-08 N28PK DBQ → DBQ Jul 8, 18:10 UTCJul 8, 20:20 UTC2h 10m
2026-07-08 N28PK DBQ → DBQ Jul 8, 16:35 UTCJul 8, 17:20 UTC45m
2026-07-08 N28PK DBQ → DBQ Jul 8, 14:40 UTCJul 8, 15:50 UTC1h 10m
2026-07-08 N28PK DBQ → DBQ Jul 8, 12:35 UTCJul 8, 13:35 UTC1h 0m
2026-07-08 N28PK DBQ → DBQ Jul 8, 03:00 UTCJul 8, 03:30 UTC30m
2026-07-08 N28PK DBQ → DBQ Jul 8, 01:05 UTCJul 8, 02:05 UTC1h 0m
2026-07-08 N28PK - Jul 8, 00:15 UTCJul 8, 00:20 UTC5m
2026-07-07 N28PK - Jul 7, 23:15 UTCJul 7, 23:40 UTC25m
2026-07-07 N28PK DBQ → DBQ Jul 7, 19:30 UTCJul 7, 20:30 UTC1h 0m
2026-07-07 N28PK DBQ → DBQ Jul 7, 17:50 UTCJul 7, 18:30 UTC40m
2026-07-07 N28PK DBQ → DBQ Jul 7, 15:05 UTCJul 7, 17:00 UTC1h 55m
2026-07-07 N28PK DBQ → DBQ Jul 7, 12:30 UTCJul 7, 14:10 UTC1h 40m
2026-07-02 N28PK DBQ → DBQ Jul 2, 17:05 UTCJul 2, 17:45 UTC40m
2026-07-02 N28PK DBQ → DBQ Jul 2, 14:30 UTCJul 2, 15:25 UTC55m
2026-07-02 N28PK DBQ → DBQ Jul 2, 12:40 UTCJul 2, 13:30 UTC50m

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 N28PK page for operator, model, and routing details .

Mode-S A2CCF1 frequently asked

What is Mode-S code A2CCF1?
A2CCF1 is an ICAO 24-bit transponder address. Allocated to United States. Assigned to N28PK.
Where is Mode-S A2CCF1 registered?
Mode-S code A2CCF1 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 A2CCF1 broadcasting right now?
No active broadcast right now. Last signal was 16h ago.
Hex, octal, and decimal Mode-S codes: what's the difference?
The same 24-bit identifier expressed in different bases: hex A2CCF1, octal 50546361, decimal 10,669,297.
What flights does A2CCF1 operate?
Mode-S A2CCF1 has broadcast 1 distinct callsign, including N28PK.