Apparatus

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sensors Mode-S transponder

A18611

ICAO 24-bit transponder address · allocated to United States

Currently assigned to N198BW · operated by FIXED WING HOLDING CO INC

Hex
A18611
Octal
50303021
Decimal
10,585,617
Country
US
Tail
N198BW
Type
C172
No current signal · last broadcast 4h ago
Flights observed
130
Distinct callsigns
1
Country
US
Last broadcast
4h ago

Last known position

Most recent position reported by Mode-S A18611.

Country allocation

The ICAO 24-bit address A18611 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
N198BW - 130 2026-05-29

Recent flights last 50

DateFlightRouteTakeoffLandingDuration
2026-05-29 N198BW - May 29, 19:40 UTCMay 29, 21:05 UTC1h 25m
2026-05-29 N198BW - May 29, 17:50 UTCMay 29, 18:40 UTC50m
2026-05-29 N198BW - May 29, 15:30 UTCMay 29, 16:35 UTC1h 5m
2026-05-28 N198BW HWO → HWO May 28, 19:40 UTCMay 28, 20:50 UTC1h 10m
2026-05-28 N198BW HWO → HWO May 28, 15:55 UTCMay 28, 16:40 UTC45m
2026-05-27 N198BW HWO → HWO May 27, 17:55 UTCMay 27, 18:50 UTC55m
2026-05-26 N198BW - May 26, 01:24 UTCMay 26, 03:15 UTC1h 50m
2026-05-25 N198BW HWO → HWO May 25, 21:45 UTCMay 25, 22:40 UTC55m
2026-05-25 N198BW - May 25, 19:40 UTCMay 25, 20:34 UTC55m
2026-05-25 N198BW HWO → HWO May 25, 17:45 UTCMay 25, 18:45 UTC1h 0m
2026-05-25 N198BW HWO → HWO May 25, 15:35 UTCMay 25, 16:45 UTC1h 10m
2026-05-25 N198BW HWO → HWO May 25, 12:30 UTCMay 25, 13:35 UTC1h 5m
2026-05-24 N198BW - May 24, 23:00 UTCMay 24, 23:40 UTC40m
2026-05-23 N198BW - May 23, 14:10 UTCMay 23, 15:00 UTC50m
2026-05-23 N198BW HWO → HWO May 23, 11:40 UTCMay 23, 13:00 UTC1h 20m
2026-05-23 N198BW - May 23, 01:05 UTCMay 23, 02:55 UTC1h 50m
2026-05-22 N198BW HWO → VNC May 22, 23:20 UTCMay 23, 00:35 UTC1h 15m
2026-05-22 N198BW HWO → HWO May 22, 00:40 UTCMay 22, 01:35 UTC55m
2026-05-21 N198BW HWO → HWO May 21, 13:55 UTCMay 21, 17:00 UTC3h 5m
2026-05-21 N198BW HWO → HWO May 21, 11:45 UTCMay 21, 12:45 UTC1h 0m
2026-05-21 N198BW - May 21, 00:00 UTCMay 21, 01:05 UTC1h 5m
2026-05-20 N198BW HWO → HWO May 20, 21:35 UTCMay 20, 22:50 UTC1h 15m
2026-05-20 N198BW HWO → HWO May 20, 19:55 UTCMay 20, 20:45 UTC50m
2026-05-20 N198BW HWO → HWO May 20, 18:05 UTCMay 20, 18:40 UTC35m
2026-05-20 N198BW HWO → HWO May 20, 15:55 UTCMay 20, 16:40 UTC45m
2026-05-20 N198BW - May 20, 13:50 UTCMay 20, 14:30 UTC40m
2026-05-20 N198BW HWO → HWO May 20, 11:40 UTCMay 20, 12:50 UTC1h 10m
2026-05-19 N198BW - May 19, 21:45 UTCMay 19, 22:45 UTC1h 0m
2026-05-19 N198BW - May 19, 19:45 UTCMay 19, 20:05 UTC20m
2026-05-19 N198BW - May 19, 17:40 UTCMay 19, 18:50 UTC1h 10m
2026-05-19 N198BW HWO → HWO May 19, 15:30 UTCMay 19, 17:05 UTC1h 35m
2026-05-19 N198BW - May 19, 13:25 UTCMay 19, 14:45 UTC1h 20m
2026-05-18 N198BW - May 18, 22:55 UTCMay 18, 23:45 UTC50m
2026-05-18 N198BW HWO → HWO May 18, 12:15 UTCMay 18, 12:40 UTC25m
2026-05-16 N198BW HWO → HWO May 16, 21:45 UTCMay 16, 23:25 UTC1h 40m
2026-05-16 N198BW - May 16, 19:55 UTCMay 16, 21:05 UTC1h 10m
2026-05-16 N198BW HWO → HWO May 16, 17:20 UTCMay 16, 18:15 UTC55m
2026-05-16 N198BW - May 16, 15:25 UTCMay 16, 16:31 UTC1h 5m
2026-05-16 N198BW HWO → HWO May 16, 13:35 UTCMay 16, 14:35 UTC1h 0m
2026-05-16 N198BW HWO → HWO May 16, 11:55 UTCMay 16, 12:31 UTC35m
2026-05-15 N198BW HWO → HWO May 15, 21:50 UTCMay 15, 22:55 UTC1h 5m
2026-05-15 N198BW - May 15, 19:35 UTCMay 15, 20:35 UTC1h 0m
2026-05-15 N198BW - May 15, 17:35 UTCMay 15, 18:25 UTC50m
2026-05-15 N198BW - May 15, 13:40 UTCMay 15, 14:45 UTC1h 5m
2026-05-15 N198BW - May 15, 11:35 UTCMay 15, 12:45 UTC1h 10m
2026-05-14 N198BW HWO → HWO May 14, 21:40 UTCMay 14, 22:40 UTC1h 0m
2026-05-14 N198BW - May 14, 15:50 UTCMay 14, 16:55 UTC1h 5m
2026-05-14 N198BW - May 14, 13:40 UTCMay 14, 14:45 UTC1h 5m
2026-05-14 N198BW HWO → HWO May 14, 11:45 UTCMay 14, 12:45 UTC1h 0m
2026-05-13 N198BW - May 13, 22:40 UTCMay 13, 23:25 UTC45m

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 N198BW page for operator, model, and routing details .

Mode-S A18611 frequently asked

What is Mode-S code A18611?
A18611 is an ICAO 24-bit transponder address. Allocated to United States. Assigned to N198BW.
Where is Mode-S A18611 registered?
Mode-S code A18611 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 A18611 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 A18611, octal 50303021, decimal 10,585,617.
What flights does A18611 operate?
Mode-S A18611 has broadcast 1 distinct callsign, including N198BW.