Apparatus

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sensors Mode-S transponder

A5F7E9

ICAO 24-bit transponder address · allocated to United States

Currently assigned to N484ER · CESSNA 172 Skyhawk · operated by WISCONSIN AVIATION-FOUR LAKES INC

Hex
A5F7E9
Octal
51373751
Decimal
10,876,905
Country
US
Tail
N484ER
Type
C172
No current signal · last broadcast 11h ago
Flights observed
149
Distinct callsigns
1
Country
US
Last broadcast
11h ago

Last known position

Most recent position reported by Mode-S A5F7E9.

Country allocation

The ICAO 24-bit address A5F7E9 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
N484ER - 149 2026-07-21

Recent flights last 50

DateFlightRouteTakeoffLandingDuration
2026-07-21 N484ER - Jul 21, 18:25 UTCJul 21, 19:45 UTC1h 20m
2026-07-21 N484ER - Jul 21, 15:45 UTCJul 21, 16:50 UTC1h 5m
2026-07-21 N484ER - Jul 21, 12:15 UTCJul 21, 13:25 UTC1h 10m
2026-07-21 N484ER - Jul 21, 00:30 UTCJul 21, 00:55 UTC25m
2026-07-20 N484ER MSN → MSN Jul 20, 21:00 UTCJul 20, 22:35 UTC1h 35m
2026-07-19 N484ER - Jul 19, 00:45 UTCJul 19, 02:00 UTC1h 15m
2026-07-18 N484ER - Jul 18, 22:40 UTCJul 18, 23:55 UTC1h 15m
2026-07-18 N484ER - Jul 18, 20:25 UTCJul 18, 21:40 UTC1h 15m
2026-07-18 N484ER - Jul 18, 15:10 UTCJul 18, 16:30 UTC1h 20m
2026-07-18 N484ER MSN → MSN Jul 18, 12:35 UTCJul 18, 13:50 UTC1h 15m
2026-07-17 N484ER - Jul 17, 21:10 UTCJul 17, 21:50 UTC40m
2026-07-16 N484ER - Jul 16, 00:20 UTCJul 16, 01:15 UTC55m
2026-07-15 N484ER - Jul 15, 21:05 UTCJul 15, 22:15 UTC1h 10m
2026-07-07 N484ER - Jul 7, 21:40 UTCJul 7, 23:05 UTC1h 25m
2026-07-07 N484ER - Jul 7, 19:50 UTCJul 7, 20:50 UTC1h 0m
2026-07-07 N484ER - Jul 7, 15:15 UTCJul 7, 18:25 UTC3h 10m
2026-07-06 N484ER - Jul 6, 17:25 UTCJul 6, 19:45 UTC2h 20m
2026-07-05 N484ER - Jul 5, 14:40 UTCJul 5, 16:20 UTC1h 40m
2026-07-02 N484ER - Jul 2, 15:55 UTCJul 2, 16:15 UTC20m
2026-06-29 N484ER MSN → MSN Jun 29, 16:00 UTCJun 29, 16:50 UTC50m
2026-06-27 N484ER MSN → MSN Jun 27, 23:00 UTCJun 28, 00:25 UTC1h 25m
2026-06-27 N484ER - Jun 27, 14:45 UTCJun 27, 16:10 UTC1h 25m
2026-06-26 N484ER - Jun 26, 17:35 UTCJun 26, 19:14 UTC1h 40m
2026-06-25 N484ER - Jun 25, 18:10 UTCJun 25, 19:29 UTC1h 20m
2026-06-25 N484ER - Jun 25, 13:14 UTCJun 25, 14:09 UTC55m
2026-06-25 N484ER - Jun 25, 01:24 UTCJun 25, 03:20 UTC1h 55m
2026-06-23 N484ER MSN → MSN Jun 23, 23:55 UTCJun 24, 01:14 UTC1h 20m
2026-06-23 N484ER - Jun 23, 21:05 UTCJun 23, 22:55 UTC1h 50m
2026-06-23 N484ER - Jun 23, 18:14 UTCJun 23, 19:29 UTC1h 15m
2026-06-23 N484ER - Jun 23, 15:19 UTCJun 23, 16:35 UTC1h 15m
2026-06-23 N484ER - Jun 23, 12:20 UTCJun 23, 13:50 UTC1h 30m
2026-06-22 N484ER - Jun 22, 21:10 UTCJun 22, 22:10 UTC1h 0m
2026-06-22 N484ER - Jun 22, 17:50 UTCJun 22, 18:04 UTC15m
2026-06-22 N484ER - Jun 22, 14:29 UTCJun 22, 15:24 UTC55m
2026-06-21 N484ER - Jun 21, 17:05 UTCJun 21, 17:54 UTC50m
2026-06-21 N484ER - Jun 21, 14:54 UTCJun 21, 15:44 UTC50m
2026-06-20 N484ER - Jun 20, 23:29 UTCJun 21, 00:10 UTC40m
2026-06-20 N484ER - Jun 20, 20:40 UTCJun 20, 22:05 UTC1h 25m
2026-06-20 N484ER - Jun 20, 17:59 UTCJun 20, 19:29 UTC1h 30m
2026-06-20 N484ER - Jun 20, 15:54 UTCJun 20, 16:44 UTC50m
2026-06-19 N484ER - Jun 19, 20:04 UTCJun 19, 20:49 UTC45m
2026-06-19 N484ER - Jun 19, 15:54 UTCJun 19, 17:09 UTC1h 15m
2026-06-18 N484ER MSN → MSN Jun 18, 21:05 UTCJun 18, 21:15 UTC10m
2026-06-18 N484ER - Jun 18, 18:10 UTCJun 18, 19:40 UTC1h 30m
2026-06-16 N484ER - Jun 16, 15:35 UTCJun 16, 17:10 UTC1h 35m
2026-06-16 N484ER MSN → MSN Jun 16, 13:25 UTCJun 16, 14:05 UTC40m
2026-06-16 N484ER - Jun 16, 01:45 UTCJun 16, 02:04 UTC20m
2026-06-16 N484ER - Jun 16, 00:55 UTCJun 16, 01:40 UTC45m
2026-06-15 N484ER MSN → MSN Jun 15, 22:59 UTCJun 15, 23:25 UTC25m
2026-06-15 N484ER - Jun 15, 18:10 UTCJun 15, 19:05 UTC55m

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 N484ER page for operator, model, and routing details .

Mode-S A5F7E9 frequently asked

What is Mode-S code A5F7E9?
A5F7E9 is an ICAO 24-bit transponder address. Allocated to United States. Assigned to N484ER.
Where is Mode-S A5F7E9 registered?
Mode-S code A5F7E9 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 A5F7E9 broadcasting right now?
No active broadcast right now. Last signal was 11h ago.
Hex, octal, and decimal Mode-S codes: what's the difference?
The same 24-bit identifier expressed in different bases: hex A5F7E9, octal 51373751, decimal 10,876,905.
What flights does A5F7E9 operate?
Mode-S A5F7E9 has broadcast 1 distinct callsign, including N484ER.