Apparatus

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sensors Mode-S transponder

A8C489

ICAO 24-bit transponder address · allocated to United States

Currently assigned to N664QX · EMBRAER ERJ-170-200 (long wing) · operated by HORIZON AIR INDUSTRIES INC

Hex
A8C489
Octal
52142211
Decimal
11,060,361
Country
US
Tail
N664QX
Type
E75L
No current signal · last broadcast 1h ago
Flights observed
695
Distinct callsigns
20
Country
US
Last broadcast
1h ago

Last known position

Most recent position reported by Mode-S A8C489.

Country allocation

The ICAO 24-bit address A8C489 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
QXE2148 - 10 2026-07-11
QXE2001 - 10 2026-07-08
QXE2308 - 9 2026-07-09
QXE2013 Horizon Air 8 2026-06-04
QXE2206 - 7 2026-07-02
QXE2154 Horizon Air 7 2026-06-04
QXE2147 - 7 2026-07-11
QXE2027 Horizon Air 7 2026-06-08
QXE2298 - 6 2026-07-05
QXE2190 - 6 2026-07-05
QXE2127 Horizon Air 6 2026-07-03
QXE2015 - 6 2026-06-26
QXE2011 - 6 2026-07-12
QXE2443 Horizon Air 5 2026-05-29
QXE2321 Horizon Air 5 2026-07-04
QXE2320 - 5 2026-07-04
QXE2311 Horizon Air 5 2026-06-03
QXE2302 - 5 2026-07-13
QXE2264 Horizon Air 5 2026-06-12
QXE2238 Horizon Air 5 2026-06-09

Recent flights last 50

DateFlightRouteTakeoffLandingDuration
2026-07-14 QXE2322 - Jul 14, 00:05 UTCJul 14, 01:10 UTC1h 5m
2026-07-13 QXE2359 YYJ → SEA Jul 13, 21:50 UTCJul 13, 22:15 UTC25m
2026-07-13 QXE2359 YYJ → SEA Jul 13, 21:50 UTCJul 13, 22:15 UTC25m
2026-07-13 QXE2149 - Jul 13, 20:20 UTCJul 13, 20:45 UTC25m
2026-07-13 QXE2207 - Jul 13, 17:50 UTCJul 13, 19:05 UTC1h 15m
2026-07-13 QXE2207 FCA → SEA Jul 13, 17:51 UTCJul 13, 18:54 UTC1h 3m
2026-07-13 QXE2183 - Jul 13, 16:00 UTCJul 13, 16:40 UTC40m
2026-07-13 QXE2046 EUG → SEA Jul 13, 13:27 UTCJul 13, 14:02 UTC35m
2026-07-13 QXE2046 EUG → SEA Jul 13, 13:30 UTCJul 13, 14:10 UTC40m
2026-07-13 QXE2047 - Jul 13, 06:15 UTCJul 13, 07:01 UTC45m
2026-07-13 QXE2047 SEA → EUG Jul 13, 06:14 UTCJul 13, 07:00 UTC46m
2026-07-13 QXE2313 - Jul 13, 03:01 UTCJul 13, 03:30 UTC30m
2026-07-13 QXE2302 - Jul 13, 01:15 UTCJul 13, 01:55 UTC40m
2026-07-12 QXE2110 - Jul 12, 22:50 UTCJul 13, 00:05 UTC1h 15m
2026-07-12 QXE2105 - Jul 12, 20:55 UTCJul 12, 21:40 UTC45m
2026-07-12 QXE2262 GEG → SEA Jul 12, 18:55 UTCJul 12, 19:40 UTC45m
2026-07-12 QXE2200 SEA → GEG Jul 12, 17:10 UTCJul 12, 17:50 UTC40m
2026-07-12 QXE2011 - Jul 12, 13:20 UTCJul 12, 13:50 UTC30m
2026-07-12 QXE2009 SEA → YVR Jul 12, 03:20 UTCJul 12, 03:50 UTC30m
2026-07-11 QXE2132 - Jul 11, 23:50 UTCJul 12, 01:00 UTC1h 10m
2026-07-11 QXE2131 - Jul 11, 21:20 UTCJul 11, 22:10 UTC50m
2026-07-11 QXE2133 - Jul 11, 18:10 UTCJul 11, 19:55 UTC1h 45m
2026-07-11 QXE2133 SBP → SEA Jul 11, 18:17 UTCJul 11, 19:53 UTC1h 36m
2026-07-11 QXE2068 - Jul 11, 15:05 UTCJul 11, 17:15 UTC2h 10m
2026-07-11 QXE2148 YYC → SEA Jul 11, 12:10 UTCJul 11, 13:35 UTC1h 25m
2026-07-11 QXE2147 - Jul 11, 03:50 UTCJul 11, 04:55 UTC1h 5m
2026-07-11 QXE2366 - Jul 11, 01:35 UTCJul 11, 02:10 UTC35m
2026-07-10 QXE2367 - Jul 10, 23:55 UTCJul 11, 00:20 UTC25m
2026-07-10 QXE2400 - Jul 10, 21:05 UTCJul 10, 21:55 UTC50m
2026-07-10 QXE2400 SEA → RDM Jul 10, 19:15 UTCJul 10, 20:00 UTC45m
2026-07-10 QXE2325 - Jul 10, 16:35 UTCJul 10, 17:50 UTC1h 15m
2026-07-10 QXE2202 - Jul 10, 14:05 UTCJul 10, 15:05 UTC1h 0m
2026-07-10 QXE2040 HLN → SEA Jul 10, 03:05 UTCJul 10, 04:05 UTC1h 0m
2026-07-10 QXE2037 BOI → BUR Jul 10, 01:05 UTCJul 10, 02:00 UTC55m
2026-07-09 QXE2350 GEG → SEA Jul 9, 23:00 UTCJul 9, 23:45 UTC45m
2026-07-09 QXE2350 GEG → SEA Jul 9, 23:00 UTCJul 9, 23:40 UTC40m
2026-07-09 QXE2259 - Jul 9, 21:05 UTCJul 9, 21:55 UTC50m
2026-07-09 QXE2106 RDM → SFO Jul 9, 19:20 UTCJul 9, 20:20 UTC1h 0m
2026-07-09 QXE2179 EUG → SEA Jul 9, 17:10 UTCJul 9, 18:00 UTC50m
2026-07-09 QXE2072 SEA → FCA Jul 9, 15:17 UTCJul 9, 16:05 UTC48m
2026-07-09 QXE2148 YYC → SEA Jul 9, 12:15 UTCJul 9, 13:30 UTC1h 15m
2026-07-09 QXE2147 SEA → YYC Jul 9, 04:03 UTCJul 9, 04:55 UTC52m
2026-07-09 QXE2147 SEA → YYC Jul 9, 03:50 UTCJul 9, 05:00 UTC1h 10m
2026-07-09 QXE2308 YYC → SEA Jul 9, 01:10 UTCJul 9, 02:30 UTC1h 20m
2026-07-08 QXE2307 SEA → YYC Jul 8, 22:55 UTCJul 9, 00:10 UTC1h 15m
2026-07-08 QXE2000 - Jul 8, 21:10 UTCJul 8, 21:30 UTC20m
2026-07-08 QXE2001 - Jul 8, 19:45 UTCJul 8, 20:00 UTC15m
2026-07-08 QXE2171 RLD → SEA Jul 8, 17:45 UTCJul 8, 18:25 UTC40m
2026-07-08 QXE2195 SEA → BIL Jul 8, 16:15 UTCJul 8, 16:45 UTC30m
2026-07-08 QXE2418 EUG → PDX Jul 8, 14:20 UTCJul 8, 14:55 UTC35m

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 N664QX page for operator, model, and routing details .

Mode-S A8C489 frequently asked

What is Mode-S code A8C489?
A8C489 is an ICAO 24-bit transponder address. Allocated to United States. Assigned to N664QX.
Where is Mode-S A8C489 registered?
Mode-S code A8C489 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 A8C489 broadcasting right now?
No active broadcast right now. Last signal was 1h ago.
Hex, octal, and decimal Mode-S codes: what's the difference?
The same 24-bit identifier expressed in different bases: hex A8C489, octal 52142211, decimal 11,060,361.
What flights does A8C489 operate?
Mode-S A8C489 has broadcast 20 distinct callsigns, including QXE2148, QXE2001, QXE2308, QXE2013, QXE2206.