Apparatus

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sensors Mode-S transponder

AAF0E4

ICAO 24-bit transponder address · allocated to United States

Currently assigned to N804BT · CESSNA 172 Skyhawk · operated by FLORES OMAR JAVIER

Hex
AAF0E4
Octal
52570344
Decimal
11,202,788
Country
US
Tail
N804BT
Type
C172
No current signal · last broadcast 5d ago
Flights observed
220
Distinct callsigns
2
Country
US
Last broadcast
5d ago

Last known position

Most recent position reported by Mode-S AAF0E4.

Country allocation

The ICAO 24-bit address AAF0E4 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 2 distinct

Callsign Airline Flights Last seen
1804BL - 208 2026-07-26
N804BL - 12 2026-04-28

Recent flights last 50

DateFlightRouteTakeoffLandingDuration
2026-07-26 1804BL - Jul 26, 12:50 UTCJul 26, 14:10 UTC1h 20m
2026-07-25 1804BL - Jul 25, 17:20 UTCJul 25, 18:30 UTC1h 10m
2026-07-25 1804BL - Jul 25, 12:05 UTCJul 25, 13:05 UTC1h 0m
2026-07-25 1804BL - Jul 25, 03:30 UTCJul 25, 05:00 UTC1h 30m
2026-07-24 1804BL - Jul 24, 20:25 UTCJul 24, 21:10 UTC45m
2026-07-24 1804BL - Jul 24, 19:00 UTCJul 24, 19:30 UTC30m
2026-07-24 1804BL - Jul 24, 18:15 UTCJul 24, 18:55 UTC40m
2026-07-24 1804BL - Jul 24, 16:05 UTCJul 24, 16:40 UTC35m
2026-07-24 1804BL - Jul 24, 13:30 UTCJul 24, 14:55 UTC1h 25m
2026-07-24 1804BL - Jul 24, 04:45 UTCJul 24, 06:00 UTC1h 15m
2026-07-24 1804BL - Jul 24, 02:35 UTCJul 24, 03:10 UTC35m
2026-07-24 1804BL - Jul 24, 00:45 UTCJul 24, 01:45 UTC1h 0m
2026-07-23 1804BL - Jul 23, 14:30 UTCJul 23, 15:45 UTC1h 15m
2026-07-23 1804BL - Jul 23, 03:30 UTCJul 23, 04:35 UTC1h 5m
2026-07-22 1804BL - Jul 22, 22:15 UTCJul 23, 00:45 UTC2h 30m
2026-07-22 1804BL - Jul 22, 20:50 UTCJul 22, 21:40 UTC50m
2026-07-22 1804BL - Jul 22, 18:50 UTCJul 22, 19:40 UTC50m
2026-07-22 1804BL - Jul 22, 16:05 UTCJul 22, 16:45 UTC40m
2026-07-22 1804BL - Jul 22, 13:30 UTCJul 22, 14:50 UTC1h 20m
2026-07-21 1804BL - Jul 21, 21:45 UTCJul 21, 22:45 UTC1h 0m
2026-07-21 1804BL - Jul 21, 19:15 UTCJul 21, 20:00 UTC45m
2026-07-21 1804BL - Jul 21, 16:35 UTCJul 21, 17:15 UTC40m
2026-07-21 1804BL - Jul 21, 02:35 UTCJul 21, 04:10 UTC1h 35m
2026-07-19 1804BL - Jul 19, 13:20 UTCJul 19, 14:35 UTC1h 15m
2026-07-19 1804BL - Jul 19, 07:45 UTCJul 19, 08:30 UTC45m
2026-07-19 1804BL - Jul 19, 07:05 UTCJul 19, 07:40 UTC35m
2026-07-19 1804BL - Jul 19, 03:00 UTCJul 19, 03:40 UTC40m
2026-07-17 1804BL - Jul 17, 20:15 UTCJul 17, 21:10 UTC55m
2026-07-17 1804BL - Jul 17, 17:40 UTCJul 17, 18:25 UTC45m
2026-07-17 1804BL - Jul 17, 15:44 UTCJul 17, 16:44 UTC1h 0m
2026-07-17 1804BL - Jul 17, 13:29 UTCJul 17, 14:44 UTC1h 15m
2026-07-15 1804BL - Jul 15, 22:40 UTCJul 15, 23:45 UTC1h 5m
2026-07-15 1804BL - Jul 15, 20:30 UTCJul 15, 21:30 UTC1h 0m
2026-07-14 1804BL - Jul 14, 14:05 UTCJul 14, 15:25 UTC1h 20m
2026-07-14 1804BL - Jul 14, 00:30 UTCJul 14, 01:25 UTC55m
2026-07-13 1804BL - Jul 13, 22:40 UTCJul 13, 23:30 UTC50m
2026-07-13 1804BL - Jul 13, 20:45 UTCJul 13, 21:50 UTC1h 5m
2026-07-13 1804BL - Jul 13, 13:20 UTCJul 13, 14:50 UTC1h 30m
2026-07-12 1804BL - Jul 12, 15:01 UTCJul 12, 16:01 UTC1h 0m
2026-07-10 1804BL - Jul 10, 00:45 UTCJul 10, 01:30 UTC45m
2026-07-09 1804BL - Jul 9, 20:35 UTCJul 9, 21:30 UTC55m
2026-07-09 1804BL - Jul 9, 17:30 UTCJul 9, 18:45 UTC1h 15m
2026-07-09 1804BL - Jul 9, 15:55 UTCJul 9, 16:40 UTC45m
2026-07-09 1804BL - Jul 9, 00:15 UTCJul 9, 00:30 UTC15m
2026-07-08 1804BL - Jul 8, 14:25 UTCJul 8, 15:15 UTC50m
2026-07-08 1804BL - Jul 8, 13:15 UTCJul 8, 13:45 UTC30m
2026-07-07 1804BL - Jul 7, 23:35 UTCJul 8, 01:30 UTC1h 55m
2026-07-07 1804BL - Jul 7, 18:25 UTCJul 7, 18:55 UTC30m
2026-07-07 1804BL - Jul 7, 16:00 UTCJul 7, 17:15 UTC1h 15m
2026-07-07 1804BL - Jul 7, 12:35 UTCJul 7, 14:50 UTC2h 15m

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 N804BT page for operator, model, and routing details .

Mode-S AAF0E4 frequently asked

What is Mode-S code AAF0E4?
AAF0E4 is an ICAO 24-bit transponder address. Allocated to United States. Assigned to N804BT.
Where is Mode-S AAF0E4 registered?
Mode-S code AAF0E4 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 AAF0E4 broadcasting right now?
No active broadcast right now. Last signal was 5d ago.
Hex, octal, and decimal Mode-S codes: what's the difference?
The same 24-bit identifier expressed in different bases: hex AAF0E4, octal 52570344, decimal 11,202,788.
What flights does AAF0E4 operate?
Mode-S AAF0E4 has broadcast 2 distinct callsigns, including 1804BL, N804BL.