Apparatus

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sensors Mode-S transponder

AB5C85

ICAO 24-bit transponder address · allocated to United States

Currently assigned to N831ER · CESSNA 172 Skyhawk · operated by EMBRY RIDDLE AERONAUTICAL UNIVERSITY

Hex
AB5C85
Octal
52656205
Decimal
11,230,341
Country
US
Tail
N831ER
Type
C172
No current signal · last broadcast 4h ago
Flights observed
228
Distinct callsigns
2
Country
US
Last broadcast
4h ago

Last known position

Most recent position reported by Mode-S AB5C85.

Country allocation

The ICAO 24-bit address AB5C85 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
ERU831 - 227 2026-07-14
B2T GHNO - 1 2026-04-28

Recent flights last 50

DateFlightRouteTakeoffLandingDuration
2026-07-14 ERU831 - Jul 14, 10:50 UTCJul 14, 12:25 UTC1h 35m
2026-07-13 ERU831 - Jul 13, 18:00 UTCJul 13, 18:55 UTC55m
2026-07-13 ERU831 - Jul 13, 15:00 UTCJul 13, 16:25 UTC1h 25m
2026-07-13 ERU831 - Jul 13, 12:45 UTCJul 13, 13:50 UTC1h 5m
2026-07-11 ERU831 - Jul 11, 23:05 UTCJul 12, 00:05 UTC1h 0m
2026-07-11 ERU831 - Jul 11, 15:45 UTCJul 11, 17:35 UTC1h 50m
2026-07-11 ERU831 - Jul 11, 13:00 UTCJul 11, 14:10 UTC1h 10m
2026-07-11 ERU831 - Jul 11, 02:10 UTCJul 11, 03:15 UTC1h 5m
2026-07-10 ERU831 - Jul 10, 23:00 UTCJul 11, 00:05 UTC1h 5m
2026-07-10 ERU831 - Jul 10, 17:05 UTCJul 10, 17:30 UTC25m
2026-07-10 ERU831 - Jul 10, 15:50 UTCJul 10, 16:25 UTC35m
2026-07-10 ERU831 - Jul 10, 10:25 UTCJul 10, 11:55 UTC1h 30m
2026-07-09 ERU831 - Jul 9, 20:20 UTCJul 9, 20:50 UTC30m
2026-07-09 ERU831 - Jul 9, 17:50 UTCJul 9, 18:45 UTC55m
2026-07-09 ERU831 - Jul 9, 10:55 UTCJul 9, 13:05 UTC2h 10m
2026-07-08 ERU831 - Jul 8, 14:40 UTCJul 8, 15:45 UTC1h 5m
2026-07-07 ERU831 DAB → DAB Jul 7, 18:45 UTCJul 7, 18:55 UTC10m
2026-07-07 ERU831 - Jul 7, 12:45 UTCJul 7, 14:10 UTC1h 25m
2026-07-06 ERU831 - Jul 6, 14:20 UTCJul 6, 14:45 UTC25m
2026-07-06 ERU831 - Jul 6, 12:20 UTCJul 6, 13:05 UTC45m
2026-07-05 ERU831 - Jul 5, 13:10 UTCJul 5, 14:30 UTC1h 20m
2026-07-04 ERU831 - Jul 4, 15:50 UTCJul 4, 17:30 UTC1h 40m
2026-07-03 ERU831 - Jul 3, 17:30 UTCJul 3, 17:45 UTC15m
2026-07-03 ERU831 - Jul 3, 16:00 UTCJul 3, 16:35 UTC35m
2026-07-03 ERU831 - Jul 3, 13:10 UTCJul 3, 14:35 UTC1h 25m
2026-06-28 ERU831 - Jun 28, 15:34 UTCJun 28, 17:00 UTC1h 25m
2026-06-27 ERU831 - Jun 27, 16:39 UTCJun 27, 17:49 UTC1h 10m
2026-06-27 ERU831 - Jun 27, 14:20 UTCJun 27, 15:00 UTC40m
2026-06-27 ERU831 - Jun 27, 12:39 UTCJun 27, 13:15 UTC35m
2026-06-26 ERU831 - Jun 26, 16:39 UTCJun 26, 17:04 UTC25m
2026-06-26 ERU831 - Jun 26, 14:59 UTCJun 26, 15:29 UTC30m
2026-06-26 ERU831 - Jun 26, 11:00 UTCJun 26, 12:55 UTC1h 55m
2026-06-26 ERU831 - Jun 26, 01:10 UTCJun 26, 01:24 UTC15m
2026-06-25 ERU831 - Jun 25, 18:04 UTCJun 25, 19:24 UTC1h 20m
2026-06-25 ERU831 - Jun 25, 15:20 UTCJun 25, 16:29 UTC1h 10m
2026-06-25 ERU831 - Jun 25, 13:05 UTCJun 25, 13:24 UTC20m
2026-06-25 ERU831 - Jun 25, 11:35 UTCJun 25, 12:35 UTC1h 0m
2026-06-24 ERU831 - Jun 24, 10:55 UTCJun 24, 12:50 UTC1h 55m
2026-06-24 ERU831 - Jun 24, 01:09 UTCJun 24, 04:10 UTC3h 0m
2026-06-23 ERU831 - Jun 23, 22:10 UTCJun 23, 23:00 UTC50m
2026-06-23 ERU831 - Jun 23, 16:39 UTCJun 23, 19:29 UTC2h 50m
2026-06-23 ERU831 - Jun 23, 11:45 UTCJun 23, 11:59 UTC15m
2026-06-23 ERU831 - Jun 23, 10:35 UTCJun 23, 10:59 UTC25m
2026-06-23 ERU831 - Jun 23, 00:00 UTCJun 23, 00:30 UTC30m
2026-06-22 ERU831 - Jun 22, 18:19 UTCJun 22, 19:34 UTC1h 15m
2026-06-22 ERU831 - Jun 22, 11:35 UTCJun 22, 14:29 UTC2h 55m
2026-06-21 ERU831 - Jun 21, 15:09 UTCJun 21, 16:34 UTC1h 25m
2026-06-21 ERU831 - Jun 21, 12:55 UTCJun 21, 13:59 UTC1h 5m
2026-06-20 ERU831 - Jun 20, 14:35 UTCJun 20, 14:50 UTC15m
2026-06-20 ERU831 - Jun 20, 13:04 UTCJun 20, 14:05 UTC1h 0m

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 N831ER page for operator, model, and routing details .

Mode-S AB5C85 frequently asked

What is Mode-S code AB5C85?
AB5C85 is an ICAO 24-bit transponder address. Allocated to United States. Assigned to N831ER.
Where is Mode-S AB5C85 registered?
Mode-S code AB5C85 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 AB5C85 broadcasting right now?
No active broadcast right now. Last signal was 4h ago.
Hex, octal, and decimal Mode-S codes: what's the difference?
The same 24-bit identifier expressed in different bases: hex AB5C85, octal 52656205, decimal 11,230,341.
What flights does AB5C85 operate?
Mode-S AB5C85 has broadcast 2 distinct callsigns, including ERU831, B2T GHNO.