Apparatus

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sensors Mode-S transponder

A826C4

ICAO 24-bit transponder address · allocated to United States

Currently assigned to N624TB · PIPER PA-44 Seminole · operated by BOARD OF TRUSTEES OF WESTERN MICHIGAN UNIVERSITY

Hex
A826C4
Octal
52023304
Decimal
11,019,972
Country
US
Tail
N624TB
Type
PA44
Broadcasting now · callsign WMU26 · 2,300 ft
Flights observed
123
Distinct callsigns
1
Country
US
Last broadcast
19h ago

Current position

A826C4 is currently broadcasting. Map zoomed to live position.

Country allocation

The ICAO 24-bit address A826C4 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
WMU26 - 123 2026-07-13

Recent flights last 50

DateFlightRouteTakeoffLandingDuration
2026-07-13 WMU26 - Jul 13, 19:45 UTCJul 13, 21:05 UTC1h 20m
2026-07-13 WMU26 - Jul 13, 18:05 UTCJul 13, 18:50 UTC45m
2026-07-13 WMU26 - Jul 13, 15:50 UTCJul 13, 16:45 UTC55m
2026-07-13 WMU26 - Jul 13, 12:55 UTCJul 13, 14:05 UTC1h 10m
2026-07-11 WMU26 - Jul 11, 14:25 UTCJul 11, 16:10 UTC1h 45m
2026-07-10 WMU26 BTL → BTL Jul 10, 21:55 UTCJul 10, 23:00 UTC1h 5m
2026-07-10 WMU26 BTL → BTL Jul 10, 18:00 UTCJul 10, 19:10 UTC1h 10m
2026-07-10 WMU26 - Jul 10, 14:25 UTCJul 10, 14:55 UTC30m
2026-07-09 WMU26 - Jul 9, 21:50 UTCJul 9, 22:40 UTC50m
2026-07-09 WMU26 - Jul 9, 13:10 UTCJul 9, 14:05 UTC55m
2026-07-09 WMU26 - Jul 9, 01:05 UTCJul 9, 02:15 UTC1h 10m
2026-07-08 WMU26 - Jul 8, 22:10 UTCJul 8, 23:20 UTC1h 10m
2026-07-08 WMU26 - Jul 8, 19:50 UTCJul 8, 21:15 UTC1h 25m
2026-07-08 WMU26 - Jul 8, 18:00 UTCJul 8, 18:45 UTC45m
2026-07-08 WMU26 - Jul 8, 15:50 UTCJul 8, 16:55 UTC1h 5m
2026-07-07 WMU26 - Jul 7, 15:50 UTCJul 7, 17:15 UTC1h 25m
2026-07-07 WMU26 - Jul 7, 13:55 UTCJul 7, 14:50 UTC55m
2026-07-07 WMU26 - Jul 7, 11:15 UTCJul 7, 12:40 UTC1h 25m
2026-07-06 WMU26 - Jul 6, 22:50 UTCJul 6, 23:05 UTC15m
2026-07-06 WMU26 - Jul 6, 21:55 UTCJul 6, 22:20 UTC25m
2026-07-06 WMU26 - Jul 6, 17:50 UTCJul 6, 18:50 UTC1h 0m
2026-07-06 WMU26 - Jul 6, 16:05 UTCJul 6, 17:00 UTC55m
2026-07-06 WMU26 - Jul 6, 12:00 UTCJul 6, 12:30 UTC30m
2026-07-02 WMU26 - Jul 2, 12:55 UTCJul 2, 14:20 UTC1h 25m
2026-07-01 WMU26 - Jul 1, 20:00 UTCJul 1, 21:10 UTC1h 10m
2026-06-29 WMU26 - Jun 29, 22:24 UTCJun 29, 23:25 UTC1h 0m
2026-06-25 WMU26 - Jun 25, 15:50 UTCJun 25, 16:59 UTC1h 10m
2026-06-24 WMU26 - Jun 24, 03:19 UTCJun 24, 04:44 UTC1h 25m
2026-06-24 WMU26 - Jun 24, 00:09 UTCJun 24, 01:49 UTC1h 40m
2026-06-23 WMU26 - Jun 23, 20:04 UTCJun 23, 21:59 UTC1h 55m
2026-06-23 WMU26 - Jun 23, 16:14 UTCJun 23, 17:09 UTC55m
2026-06-23 WMU26 - Jun 23, 01:40 UTCJun 23, 03:29 UTC1h 50m
2026-06-22 WMU26 - Jun 22, 21:59 UTCJun 23, 00:00 UTC2h 0m
2026-06-22 WMU26 - Jun 22, 20:00 UTCJun 22, 21:05 UTC1h 5m
2026-06-11 WMU26 - Jun 11, 19:15 UTCJun 11, 20:30 UTC1h 15m
2026-06-11 WMU26 - Jun 11, 15:50 UTCJun 11, 17:00 UTC1h 10m
2026-06-10 WMU26 - Jun 10, 20:15 UTCJun 10, 20:55 UTC40m
2026-06-08 WMU26 - Jun 8, 14:00 UTCJun 8, 15:15 UTC1h 15m
2026-06-05 WMU26 - Jun 5, 13:20 UTCJun 5, 14:25 UTC1h 5m
2026-06-04 WMU26 - Jun 4, 23:10 UTCJun 4, 23:30 UTC20m
2026-06-04 WMU26 - Jun 4, 21:55 UTCJun 4, 22:40 UTC45m
2026-06-04 WMU26 - Jun 4, 18:35 UTCJun 4, 19:00 UTC25m
2026-06-04 WMU26 - Jun 4, 14:15 UTCJun 4, 14:45 UTC30m
2026-06-03 WMU26 - Jun 3, 19:50 UTCJun 3, 21:00 UTC1h 10m
2026-06-03 WMU26 - Jun 3, 17:45 UTCJun 3, 18:50 UTC1h 5m
2026-06-03 WMU26 - Jun 3, 13:40 UTCJun 3, 15:00 UTC1h 20m
2026-06-02 WMU26 - Jun 2, 15:50 UTCJun 2, 16:55 UTC1h 5m
2026-06-02 WMU26 - Jun 2, 02:00 UTCJun 2, 03:50 UTC1h 50m
2026-06-01 WMU26 - Jun 1, 19:50 UTCJun 1, 21:05 UTC1h 15m
2026-06-01 WMU26 - Jun 1, 14:10 UTCJun 1, 15:00 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 N624TB page for operator, model, and routing details .

Mode-S A826C4 frequently asked

What is Mode-S code A826C4?
A826C4 is an ICAO 24-bit transponder address. Allocated to United States. Assigned to N624TB.
Where is Mode-S A826C4 registered?
Mode-S code A826C4 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 A826C4 broadcasting right now?
Yes. Mode-S A826C4 is currently airborne.
Hex, octal, and decimal Mode-S codes: what's the difference?
The same 24-bit identifier expressed in different bases: hex A826C4, octal 52023304, decimal 11,019,972.
What flights does A826C4 operate?
Mode-S A826C4 has broadcast 1 distinct callsign, including WMU26.