Apparatus

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sensors Mode-S transponder

A8AF9D

ICAO 24-bit transponder address · allocated to United States

Currently assigned to N659QX · operated by HORIZON AIR INDUSTRIES INC

Hex
A8AF9D
Octal
52127635
Decimal
11,055,005
Country
US
Tail
N659QX
Type
E75L
No current signal · last broadcast Jul 26, 20:50 UTC
Flights observed
661
Distinct callsigns
20
Country
US
Last broadcast
Jul 26, 20:50 UTC

Last known position

Most recent position reported by Mode-S A8AF9D.

Country allocation

The ICAO 24-bit address A8AF9D 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 20 distinct

Callsign Airline Flights Last seen
QXE2180 Horizon Air 9 2026-07-11
QXE2027 - 9 2026-07-14
QXE2407 - 7 2026-07-12
QXE2264 - 7 2026-07-11
QXE2030 - 7 2026-07-12
QXE9988 Horizon Air 6 2026-06-26
QXE2444 Horizon Air 6 2026-05-20
QXE2310 - 6 2026-07-17
QXE2302 - 6 2026-07-06
QXE2285 Horizon Air 6 2026-07-23
QXE2276 - 6 2026-07-17
QXE2262 - 6 2026-07-14
QXE2200 - 6 2026-07-14
QXE2109 - 6 2026-07-15
QXE2076 - 6 2026-07-15
QXE2050 Horizon Air 6 2026-07-18
QXE2028 Horizon Air 6 2026-07-19
QXE2416 - 5 2026-07-19
QXE2376 Horizon Air 5 2026-07-11
QXE2375 - 5 2026-07-11

Recent flights last 50

DateFlightRouteTakeoffLandingDuration
2026-07-26 QXE2221 PDX → OAK Jul 26, 19:05 UTCJul 26, 20:50 UTC1h 45m
2026-07-26 QXE2437 PAE → SAN Jul 26, 15:05 UTCJul 26, 17:15 UTC2h 10m
2026-07-26 QXE2437 PAE → SAN Jul 26, 15:15 UTCJul 26, 17:47 UTC2h 32m
2026-07-26 QXE2083 SEA → OAK Jul 26, 06:10 UTCJul 26, 07:45 UTC1h 36m
2026-07-26 QXE2083 SEA → OAK Jul 26, 06:10 UTCJul 26, 07:44 UTC1h 34m
2026-07-26 QXE2248 SFO → RDM Jul 26, 02:50 UTCJul 26, 05:00 UTC2h 10m
2026-07-25 QXE2279 LAX → PAE Jul 25, 23:05 UTCJul 26, 01:15 UTC2h 10m
2026-07-25 QXE2279 LAX → PAE Jul 25, 23:04 UTCJul 26, 01:05 UTC2h 1m
2026-07-25 QXE2323 PDX → BZN Jul 25, 20:05 UTCJul 25, 22:05 UTC2h 0m
2026-07-25 QXE2324 BOI → SJC Jul 25, 17:20 UTCJul 25, 19:00 UTC1h 40m
2026-07-25 QXE2324 BOI → SJC Jul 25, 17:33 UTCJul 25, 18:49 UTC1h 16m
2026-07-25 QXE2075 RDM → LAX Jul 25, 14:10 UTCJul 25, 16:05 UTC1h 55m
2026-07-25 QXE2094 SEA → SMF Jul 25, 06:05 UTCJul 25, 06:50 UTC45m
2026-07-25 QXE2094 SEA → SMF Jul 25, 06:05 UTCJul 25, 06:51 UTC46m
2026-07-25 QXE2128 SEA → SFO Jul 25, 03:20 UTCJul 25, 05:05 UTC1h 45m
2026-07-25 QXE2129 SEA → SFO Jul 25, 00:30 UTCJul 25, 02:30 UTC2h 0m
2026-07-24 QXE2015 GEG → BOI Jul 24, 22:45 UTCJul 24, 23:15 UTC30m
2026-07-24 QXE2006 OAK → PDX Jul 24, 20:40 UTCJul 24, 21:15 UTC35m
2026-07-24 QXE2006 OAK → PDX Jul 24, 20:49 UTCJul 24, 21:11 UTC22m
2026-07-24 QXE2145 FAI → ANC Jul 24, 17:55 UTCJul 24, 19:20 UTC1h 25m
2026-07-24 QXE2144 SJC → PDX Jul 24, 15:30 UTCJul 24, 16:35 UTC1h 5m
2026-07-24 QXE2452 MFR → SEA Jul 24, 13:10 UTCJul 24, 14:10 UTC1h 0m
2026-07-24 QXE2266 PDX → MFR Jul 24, 05:10 UTCJul 24, 06:10 UTC1h 0m
2026-07-24 QXE2056 SEA → SJC Jul 24, 01:00 UTCJul 24, 02:35 UTC1h 35m
2026-07-23 QXE2056 SEA → SJC Jul 23, 21:55 UTCJul 23, 23:45 UTC1h 50m
2026-07-23 QXE2003 SEA → OAK Jul 23, 20:06 UTCJul 23, 20:35 UTC29m
2026-07-23 QXE2003 SEA → OAK Jul 23, 19:50 UTCJul 23, 20:45 UTC55m
2026-07-23 QXE2225 - Jul 23, 17:45 UTCJul 23, 18:35 UTC50m
2026-07-23 QXE2298 SLC → SAN Jul 23, 15:00 UTCJul 23, 16:15 UTC1h 15m
2026-07-23 QXE2298 SLC → SAN Jul 23, 14:56 UTCJul 23, 16:04 UTC1h 8m
2026-07-23 QXE2285 LAX → SJC Jul 23, 05:15 UTCJul 23, 06:25 UTC1h 10m
2026-07-23 QXE2257 SAN → SFO Jul 23, 03:00 UTCJul 23, 04:15 UTC1h 15m
2026-07-22 QXE2458 LAX → RNO Jul 22, 22:55 UTCJul 23, 00:10 UTC1h 15m
2026-07-22 QXE2459 SEA → SFO Jul 22, 20:40 UTCJul 22, 21:50 UTC1h 10m
2026-07-22 QXE2330 EUG → SEA Jul 22, 18:00 UTCJul 22, 19:30 UTC1h 30m
2026-07-22 QXE2316 SJC → LAX Jul 22, 14:40 UTCJul 22, 16:20 UTC1h 40m
2026-07-22 QXE2316 SJC → LAX Jul 22, 14:49 UTCJul 22, 16:07 UTC1h 18m
2026-07-22 QXE2315 SEA → MSO Jul 22, 04:50 UTCJul 22, 05:25 UTC35m
2026-07-22 QXE2456 SEA → SFO Jul 22, 01:00 UTCJul 22, 02:55 UTC1h 55m
2026-07-21 QXE2093 PDX → SEA Jul 21, 22:00 UTCJul 22, 00:15 UTC2h 15m
2026-07-21 QXE2365 LAX → SFO Jul 21, 19:50 UTCJul 21, 20:30 UTC40m
2026-07-21 QXE2365 LAX → SFO Jul 21, 19:48 UTCJul 21, 20:28 UTC40m
2026-07-21 QXE2126 SJC → SEA Jul 21, 18:20 UTCJul 21, 18:50 UTC30m
2026-07-21 QXE2095 SMF → PDX Jul 21, 15:32 UTCJul 21, 16:47 UTC1h 15m
2026-07-21 QXE2095 SMF → PDX Jul 21, 15:25 UTCJul 21, 16:40 UTC1h 15m
2026-07-21 QXE2156 - Jul 21, 13:10 UTCJul 21, 14:15 UTC1h 5m
2026-07-21 QXE2201 LAX → LAS Jul 21, 05:30 UTCJul 21, 07:05 UTC1h 35m
2026-07-21 QXE2329 LAS → LAX Jul 21, 01:25 UTCJul 21, 03:05 UTC1h 40m
2026-07-20 QXE2125 PDX → MFR Jul 20, 23:55 UTCJul 21, 00:40 UTC45m
2026-07-20 QXE2188 SJC → PDX Jul 20, 20:30 UTCJul 20, 21:50 UTC1h 20m

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 N659QX page for operator, model, and routing details .

Mode-S A8AF9D frequently asked

What is Mode-S code A8AF9D?
A8AF9D is an ICAO 24-bit transponder address. Allocated to United States. Assigned to N659QX.
Where is Mode-S A8AF9D registered?
Mode-S code A8AF9D 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 A8AF9D broadcasting right now?
No active broadcast right now. Last signal was Jul 26, 20:50 UTC.
Hex, octal, and decimal Mode-S codes: what's the difference?
The same 24-bit identifier expressed in different bases: hex A8AF9D, octal 52127635, decimal 11,055,005.
What flights does A8AF9D operate?
Mode-S A8AF9D has broadcast 20 distinct callsigns, including QXE2180, QXE2027, QXE2407, QXE2264, QXE2030.