Apparatus

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sensors Mode-S transponder

A157D9

ICAO 24-bit transponder address · allocated to United States

Currently assigned to N186KB · PIPER PA-28-140/150/160/180 · operated by AIMS COMMUNITY COLLEGE

Hex
A157D9
Octal
50253731
Decimal
10,573,785
Country
US
Tail
N186KB
Type
P28A
No current signal · last broadcast 1d ago
Flights observed
141
Distinct callsigns
1
Country
US
Last broadcast
1d ago

Last known position

Most recent position reported by Mode-S A157D9.

Country allocation

The ICAO 24-bit address A157D9 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
RTY186 - 141 2026-07-26

Recent flights last 50

DateFlightRouteTakeoffLandingDuration
2026-07-26 RTY186 - Jul 26, 16:35 UTCJul 26, 17:05 UTC30m
2026-07-26 RTY186 - Jul 26, 15:25 UTCJul 26, 16:00 UTC35m
2026-07-26 RTY186 FNL → FNL Jul 26, 13:00 UTCJul 26, 14:10 UTC1h 10m
2026-07-25 RTY186 FNL → FNL Jul 25, 16:25 UTCJul 25, 18:05 UTC1h 40m
2026-07-25 RTY186 - Jul 25, 14:45 UTCJul 25, 15:20 UTC35m
2026-07-25 RTY186 - Jul 25, 13:00 UTCJul 25, 13:30 UTC30m
2026-07-24 RTY186 FNL → FNL Jul 24, 15:20 UTCJul 24, 16:40 UTC1h 20m
2026-07-23 RTY186 FNL → FNL Jul 23, 15:25 UTCJul 23, 16:00 UTC35m
2026-07-23 RTY186 FNL → FNL Jul 23, 13:00 UTCJul 23, 14:00 UTC1h 0m
2026-07-22 RTY186 FNL → FNL Jul 22, 17:00 UTCJul 22, 18:45 UTC1h 45m
2026-07-22 RTY186 FNL → FNL Jul 22, 14:20 UTCJul 22, 15:50 UTC1h 30m
2026-07-21 RTY186 FNL → FNL Jul 21, 16:35 UTCJul 21, 17:40 UTC1h 5m
2026-07-16 RTY186 - Jul 16, 23:55 UTCJul 17, 00:30 UTC35m
2026-07-16 RTY186 - Jul 16, 19:40 UTCJul 16, 20:15 UTC35m
2026-07-16 RTY186 - Jul 16, 18:00 UTCJul 16, 18:29 UTC30m
2026-07-16 RTY186 - Jul 16, 14:00 UTCJul 16, 14:35 UTC35m
2026-07-15 RTY186 FNL → FNL Jul 15, 15:20 UTCJul 15, 16:10 UTC50m
2026-07-14 RTY186 FNL → FNL Jul 14, 16:50 UTCJul 14, 17:50 UTC1h 0m
2026-07-14 RTY186 FNL → FNL Jul 14, 14:25 UTCJul 14, 15:50 UTC1h 25m
2026-07-13 RTY186 FNL → FNL Jul 13, 17:15 UTCJul 13, 18:30 UTC1h 15m
2026-07-13 RTY186 FNL → FNL Jul 13, 15:20 UTCJul 13, 16:25 UTC1h 5m
2026-07-13 RTY186 FNL → FNL Jul 13, 12:55 UTCJul 13, 14:20 UTC1h 25m
2026-07-12 RTY186 - Jul 12, 19:45 UTCJul 12, 20:25 UTC40m
2026-07-12 RTY186 - Jul 12, 18:25 UTCJul 12, 18:50 UTC25m
2026-07-12 RTY186 - Jul 12, 16:01 UTCJul 12, 16:10 UTC10m
2026-07-12 RTY186 - Jul 12, 14:35 UTCJul 12, 15:15 UTC40m
2026-07-11 RTY186 FNL → FNL Jul 11, 17:40 UTCJul 11, 19:05 UTC1h 25m
2026-07-11 RTY186 FNL → FNL Jul 11, 14:20 UTCJul 11, 15:40 UTC1h 20m
2026-07-10 RTY186 FNL → FNL Jul 10, 17:50 UTCJul 10, 19:05 UTC1h 15m
2026-07-10 RTY186 FNL → FNL Jul 10, 15:20 UTCJul 10, 16:45 UTC1h 25m
2026-07-10 RTY186 FNL → FNL Jul 10, 12:25 UTCJul 10, 13:35 UTC1h 10m
2026-07-09 RTY186 FNL → FNL Jul 9, 17:25 UTCJul 9, 18:20 UTC55m
2026-07-09 RTY186 FNL → FNL Jul 9, 13:00 UTCJul 9, 14:45 UTC1h 45m
2026-07-07 RTY186 - Jul 7, 20:05 UTCJul 7, 21:15 UTC1h 10m
2026-07-07 RTY186 FNL → FNL Jul 7, 18:05 UTCJul 7, 19:15 UTC1h 10m
2026-07-07 RTY186 FNL → FNL Jul 7, 15:40 UTCJul 7, 16:40 UTC1h 0m
2026-07-07 RTY186 FNL → FNL Jul 7, 13:05 UTCJul 7, 14:20 UTC1h 15m
2026-07-06 RTY186 FNL → FNL Jul 6, 18:05 UTCJul 6, 19:15 UTC1h 10m
2026-07-01 RTY186 FNL → FNL Jul 1, 22:20 UTCJul 1, 23:50 UTC1h 30m
2026-07-01 RTY186 FNL → FNL Jul 1, 19:00 UTCJul 1, 19:40 UTC40m
2026-07-01 RTY186 FNL → FNL Jul 1, 14:35 UTCJul 1, 15:55 UTC1h 20m
2026-06-30 RTY186 FNL → FNL Jun 30, 15:25 UTCJun 30, 16:25 UTC1h 0m
2026-06-30 RTY186 FNL → FNL Jun 30, 12:50 UTCJun 30, 14:15 UTC1h 25m
2026-06-27 RTY186 FNL → FNL Jun 27, 03:25 UTCJun 27, 04:44 UTC1h 20m
2026-06-26 RTY186 FNL → FNL Jun 26, 17:50 UTCJun 26, 18:39 UTC50m
2026-06-26 RTY186 FNL → FNL Jun 26, 13:30 UTCJun 26, 14:55 UTC1h 25m
2026-06-24 RTY186 FNL → FNL Jun 24, 19:29 UTCJun 24, 20:14 UTC45m
2026-06-23 RTY186 FNL → FNL Jun 23, 19:29 UTCJun 23, 20:49 UTC1h 20m
2026-06-23 RTY186 FNL → FNL Jun 23, 17:09 UTCJun 23, 18:20 UTC1h 10m
2026-06-20 RTY186 FNL → FNL Jun 20, 17:04 UTCJun 20, 18:19 UTC1h 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 N186KB page for operator, model, and routing details .

Mode-S A157D9 frequently asked

What is Mode-S code A157D9?
A157D9 is an ICAO 24-bit transponder address. Allocated to United States. Assigned to N186KB.
Where is Mode-S A157D9 registered?
Mode-S code A157D9 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 A157D9 broadcasting right now?
No active broadcast right now. Last signal was 1d ago.
Hex, octal, and decimal Mode-S codes: what's the difference?
The same 24-bit identifier expressed in different bases: hex A157D9, octal 50253731, decimal 10,573,785.
What flights does A157D9 operate?
Mode-S A157D9 has broadcast 1 distinct callsign, including RTY186.