Apparatus

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sensors Mode-S transponder

AB4FE2

ICAO 24-bit transponder address · allocated to United States

Currently assigned to N828PK · CESSNA 172 Skyhawk · operated by ELIZABETH CITY STATE UNIVERSITY

Hex
AB4FE2
Octal
52647742
Decimal
11,227,106
Country
US
Tail
N828PK
Type
C172
No current signal · last broadcast 1h ago
Flights observed
201
Distinct callsigns
1
Country
US
Last broadcast
1h ago

Last known position

Most recent position reported by Mode-S AB4FE2.

Country allocation

The ICAO 24-bit address AB4FE2 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
N828PK - 201 2026-07-14

Recent flights last 50

DateFlightRouteTakeoffLandingDuration
2026-07-14 N828PK ECG → ECG Jul 14, 12:40 UTCJul 14, 13:20 UTC40m
2026-07-13 N828PK ECG → ECG Jul 13, 19:50 UTCJul 13, 20:45 UTC55m
2026-07-13 N828PK - Jul 13, 17:35 UTCJul 13, 18:40 UTC1h 5m
2026-07-13 N828PK - Jul 13, 14:45 UTCJul 13, 15:55 UTC1h 10m
2026-07-13 N828PK - Jul 13, 13:00 UTCJul 13, 13:45 UTC45m
2026-07-11 N828PK ECG → ECG Jul 11, 17:15 UTCJul 11, 19:00 UTC1h 45m
2026-07-10 N828PK ECG → ECG Jul 10, 18:10 UTCJul 10, 18:55 UTC45m
2026-07-10 N828PK - Jul 10, 14:35 UTCJul 10, 15:45 UTC1h 10m
2026-07-10 N828PK - Jul 10, 12:35 UTCJul 10, 13:45 UTC1h 10m
2026-07-09 N828PK - Jul 9, 21:50 UTCJul 9, 23:00 UTC1h 10m
2026-07-09 N828PK - Jul 9, 17:35 UTCJul 9, 18:20 UTC45m
2026-07-09 N828PK - Jul 9, 15:10 UTCJul 9, 15:45 UTC35m
2026-07-09 N828PK - Jul 9, 12:30 UTCJul 9, 13:35 UTC1h 5m
2026-07-07 N828PK - Jul 7, 19:35 UTCJul 7, 20:35 UTC1h 0m
2026-07-07 N828PK - Jul 7, 15:45 UTCJul 7, 16:30 UTC45m
2026-07-07 N828PK ECG → ECG Jul 7, 12:35 UTCJul 7, 13:50 UTC1h 15m
2026-07-06 N828PK - Jul 6, 18:05 UTCJul 6, 18:40 UTC35m
2026-07-06 N828PK - Jul 6, 12:40 UTCJul 6, 13:50 UTC1h 10m
2026-07-04 N828PK - Jul 4, 03:50 UTCJul 4, 04:10 UTC20m
2026-07-04 N828PK - Jul 4, 01:25 UTCJul 4, 02:10 UTC45m
2026-07-02 N828PK - Jul 2, 22:20 UTCJul 2, 23:50 UTC1h 30m
2026-07-02 N828PK - Jul 2, 20:45 UTCJul 2, 21:45 UTC1h 0m
2026-07-02 N828PK - Jul 2, 19:05 UTCJul 2, 19:55 UTC50m
2026-07-02 N828PK ECG → ECG Jul 2, 17:35 UTCJul 2, 18:25 UTC50m
2026-07-02 N828PK ECG → ECG Jul 2, 16:00 UTCJul 2, 16:45 UTC45m
2026-07-02 N828PK - Jul 2, 13:45 UTCJul 2, 14:00 UTC15m
2026-07-02 N828PK - Jul 2, 12:40 UTCJul 2, 13:10 UTC30m
2026-07-01 N828PK - Jul 1, 19:20 UTCJul 1, 20:45 UTC1h 25m
2026-07-01 N828PK - Jul 1, 17:50 UTCJul 1, 18:45 UTC55m
2026-07-01 N828PK - Jul 1, 16:00 UTCJul 1, 16:40 UTC40m
2026-07-01 N828PK - Jul 1, 14:25 UTCJul 1, 15:15 UTC50m
2026-07-01 N828PK - Jul 1, 12:35 UTCJul 1, 13:40 UTC1h 5m
2026-06-30 N828PK - Jun 30, 17:35 UTCJun 30, 18:50 UTC1h 15m
2026-06-30 N828PK - Jun 30, 16:40 UTCJun 30, 16:55 UTC15m
2026-06-30 N828PK - Jun 30, 15:45 UTCJun 30, 16:00 UTC15m
2026-06-30 N828PK - Jun 30, 12:25 UTCJun 30, 13:55 UTC1h 30m
2026-06-29 N828PK ECG → ECG Jun 29, 21:30 UTCJun 29, 22:35 UTC1h 5m
2026-06-29 N828PK ECG → ECG Jun 29, 15:19 UTCJun 29, 16:04 UTC45m
2026-06-27 N828PK - Jun 27, 15:24 UTCJun 27, 15:45 UTC20m
2026-06-27 N828PK - Jun 27, 14:29 UTCJun 27, 14:49 UTC20m
2026-06-26 N828PK - Jun 26, 21:50 UTCJun 26, 22:49 UTC1h 0m
2026-06-26 N828PK - Jun 26, 17:44 UTCJun 26, 17:54 UTC10m
2026-06-26 N828PK - Jun 26, 14:25 UTCJun 26, 16:44 UTC2h 20m
2026-06-26 N828PK - Jun 26, 12:50 UTCJun 26, 12:59 UTC10m
2026-06-25 N828PK - Jun 25, 19:29 UTCJun 25, 20:49 UTC1h 20m
2026-06-25 N828PK - Jun 25, 17:44 UTCJun 25, 18:19 UTC35m
2026-06-25 N828PK - Jun 25, 15:29 UTCJun 25, 16:55 UTC1h 25m
2026-06-25 N828PK - Jun 25, 12:50 UTCJun 25, 13:35 UTC45m
2026-06-25 N828PK - Jun 25, 01:19 UTCJun 25, 02:39 UTC1h 20m
2026-06-24 N828PK - Jun 24, 20:24 UTCJun 24, 23:00 UTC2h 35m

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 N828PK page for operator, model, and routing details .

Mode-S AB4FE2 frequently asked

What is Mode-S code AB4FE2?
AB4FE2 is an ICAO 24-bit transponder address. Allocated to United States. Assigned to N828PK.
Where is Mode-S AB4FE2 registered?
Mode-S code AB4FE2 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 AB4FE2 broadcasting right now?
No active broadcast right now. Last signal was 1h ago.
Hex, octal, and decimal Mode-S codes: what's the difference?
The same 24-bit identifier expressed in different bases: hex AB4FE2, octal 52647742, decimal 11,227,106.
What flights does AB4FE2 operate?
Mode-S AB4FE2 has broadcast 1 distinct callsign, including N828PK.