Apparatus

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sensors Mode-S transponder

A13BBF

ICAO 24-bit transponder address · allocated to United States

Currently assigned to N179MR · CIRRUS SR-20 · operated by SHILOH SERVICES INC

Hex
A13BBF
Octal
50235677
Decimal
10,566,591
Country
US
Tail
N179MR
Type
SR20
No current signal · last broadcast Jun 25, 20:45 UTC
Flights observed
35
Distinct callsigns
1
Country
US
Last broadcast
Jun 25, 20:45 UTC

Last known position

Most recent position reported by Mode-S A13BBF.

Country allocation

The ICAO 24-bit address A13BBF 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
N179MR - 35 2026-06-25

Recent flights last 35

DateFlightRouteTakeoffLandingDuration
2026-06-25 N179MR - Jun 25, 20:09 UTCJun 25, 20:45 UTC35m
2026-06-25 N179MR - Jun 25, 18:55 UTCJun 25, 19:15 UTC20m
2026-06-24 N179MR - Jun 24, 20:44 UTCJun 24, 20:54 UTC10m
2026-06-24 N179MR - Jun 24, 19:15 UTCJun 24, 19:39 UTC25m
2026-06-24 N179MR - Jun 24, 18:25 UTCJun 24, 18:44 UTC20m
2026-06-24 N179MR - Jun 24, 16:24 UTCJun 24, 17:29 UTC1h 5m
2026-06-23 N179MR - Jun 23, 18:50 UTCJun 23, 19:50 UTC1h 0m
2026-06-23 N179MR - Jun 23, 17:34 UTCJun 23, 17:59 UTC25m
2026-06-23 N179MR - Jun 23, 16:29 UTCJun 23, 16:50 UTC20m
2026-06-23 N179MR - Jun 23, 15:09 UTCJun 23, 15:34 UTC25m
2026-06-22 N179MR - Jun 22, 20:00 UTCJun 22, 20:19 UTC20m
2026-06-22 N179MR - Jun 22, 18:30 UTCJun 22, 19:05 UTC35m
2026-06-16 N179MR - Jun 16, 18:50 UTCJun 16, 20:05 UTC1h 16m
2026-06-13 N179MR - Jun 13, 01:30 UTCJun 13, 02:00 UTC30m
2026-06-06 N179MR - Jun 6, 18:14 UTCJun 6, 18:25 UTC10m
2026-06-06 N179MR - Jun 6, 17:34 UTCJun 6, 18:09 UTC35m
2026-05-23 N179MR - May 23, 02:30 UTCMay 23, 02:40 UTC10m
2026-05-23 N179MR - May 23, 02:10 UTCMay 23, 02:25 UTC15m
2026-05-23 N179MR - May 23, 01:50 UTCMay 23, 01:55 UTC5m
2026-05-23 N179MR - May 23, 01:35 UTCMay 23, 01:40 UTC5m
2026-05-23 N179MR - May 23, 01:25 UTCMay 23, 01:30 UTC5m
2026-05-22 N179MR - May 22, 21:45 UTCMay 22, 22:05 UTC20m
2026-05-22 N179MR - May 22, 21:30 UTCMay 22, 21:40 UTC10m
2026-05-12 N179MR - May 12, 20:20 UTCMay 12, 22:45 UTC2h 25m
2026-05-12 N179MR - May 12, 19:05 UTCMay 12, 19:35 UTC30m
2026-05-12 N179MR - May 12, 12:55 UTCMay 12, 17:05 UTC4h 10m
2026-05-08 N179MR - May 8, 18:10 UTCMay 8, 19:50 UTC1h 40m
2026-05-08 N179MR - May 8, 14:40 UTCMay 8, 17:10 UTC2h 30m
2026-05-07 N179MR - May 7, 20:50 UTCMay 7, 23:55 UTC3h 5m
2026-05-04 N179MR - May 4, 17:55 UTCMay 4, 18:25 UTC30m
2026-05-04 N179MR - May 4, 13:45 UTCMay 4, 14:20 UTC35m
2026-05-02 N179MR - May 2, 18:35 UTCMay 2, 19:05 UTC30m
2026-05-02 N179MR - May 2, 16:50 UTCMay 2, 17:15 UTC25m
2026-04-19 N179MR - Apr 19, 23:30 UTCApr 20, 00:30 UTC1h 0m
2026-04-15 N179MR - Apr 15, 22:05 UTCApr 15, 22:55 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 N179MR page for operator, model, and routing details .

Mode-S A13BBF frequently asked

What is Mode-S code A13BBF?
A13BBF is an ICAO 24-bit transponder address. Allocated to United States. Assigned to N179MR.
Where is Mode-S A13BBF registered?
Mode-S code A13BBF 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 A13BBF broadcasting right now?
No active broadcast right now. Last signal was Jun 25, 20:45 UTC.
Hex, octal, and decimal Mode-S codes: what's the difference?
The same 24-bit identifier expressed in different bases: hex A13BBF, octal 50235677, decimal 10,566,591.
What flights does A13BBF operate?
Mode-S A13BBF has broadcast 1 distinct callsign, including N179MR.