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
Transponder active on ground
Flights observed
790
Distinct callsigns
20
Country
US
Last broadcast
Jul 26, 21:55 UTC

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 Horizon Air 13 2026-07-24
QXE2147 Horizon Air 12 2026-07-24
QXE2308 Horizon Air 11 2026-07-24
QXE2001 - 10 2026-07-08
QXE2027 Horizon Air 9 2026-07-26
QXE2154 Horizon Air 8 2026-07-25
QXE2133 Horizon Air 8 2026-07-24
QXE2013 Horizon Air 8 2026-06-04
QXE2307 Horizon Air 7 2026-07-23
QXE2306 Horizon Air 7 2026-07-20
QXE2206 - 7 2026-07-02
QXE2161 Horizon Air 7 2026-07-23
QXE2132 Horizon Air 7 2026-07-25
QXE2402 Horizon Air 6 2026-07-19
QXE2298 - 6 2026-07-05
QXE2264 - 6 2026-07-16
QXE2190 - 6 2026-07-05
QXE2166 Horizon Air 6 2026-07-23
QXE2127 Horizon Air 6 2026-07-03
QXE2015 - 6 2026-06-26

Recent flights last 50

DateFlightRouteTakeoffLandingDuration
2026-07-26 QXE2055 GEG → SFO Jul 26, 20:05 UTCJul 26, 21:55 UTC1h 50m
2026-07-26 QXE2054 OAK → PDX Jul 26, 17:45 UTCJul 26, 18:35 UTC50m
2026-07-26 QXE2027 PDX → SFO Jul 26, 14:25 UTCJul 26, 15:15 UTC50m
2026-07-26 QXE2162 SFO → SNA Jul 26, 04:05 UTCJul 26, 05:45 UTC1h 40m
2026-07-26 QXE2284 SEA → FCA Jul 26, 01:10 UTCJul 26, 03:05 UTC1h 55m
2026-07-25 QXE2061 SBP → SEA Jul 25, 23:10 UTCJul 26, 00:10 UTC1h 0m
2026-07-25 QXE2055 GEG → SFO Jul 25, 20:55 UTCJul 25, 22:00 UTC1h 5m
2026-07-25 QXE2054 OAK → PDX Jul 25, 17:50 UTCJul 25, 19:20 UTC1h 30m
2026-07-25 QXE2153 SFO → PHX Jul 25, 13:25 UTCJul 25, 14:25 UTC1h 0m
2026-07-25 QXE2154 PAE → SAN Jul 25, 03:55 UTCJul 25, 04:35 UTC40m
2026-07-25 QXE2132 SEA → SFO Jul 25, 00:00 UTCJul 25, 01:05 UTC1h 5m
2026-07-24 QXE2132 SEA → SFO Jul 24, 23:47 UTCJul 25, 00:59 UTC1h 12m
2026-07-24 QXE2131 PDX → GEG Jul 24, 21:50 UTCJul 24, 22:40 UTC50m
2026-07-24 QXE2133 PDX → SFO Jul 24, 18:50 UTCJul 24, 20:45 UTC1h 55m
2026-07-24 QXE2133 PDX → SFO Jul 24, 18:48 UTCJul 24, 20:35 UTC1h 47m
2026-07-24 QXE2068 SFO → PAE Jul 24, 15:55 UTCJul 24, 17:55 UTC2h 0m
2026-07-24 QXE2148 LAX → SFO Jul 24, 12:35 UTCJul 24, 13:55 UTC1h 20m
2026-07-24 QXE2147 SFO → LAX Jul 24, 06:25 UTCJul 24, 07:35 UTC1h 10m
2026-07-24 QXE2308 SJC → PDX Jul 24, 03:15 UTCJul 24, 04:40 UTC1h 25m
2026-07-23 QXE2307 GEG → SFO Jul 23, 23:40 UTCJul 24, 00:50 UTC1h 10m
2026-07-23 QXE2205 RNO → LAX Jul 23, 21:35 UTCJul 23, 22:15 UTC40m
2026-07-23 QXE2205 RNO → LAX Jul 23, 21:33 UTCJul 23, 22:00 UTC27m
2026-07-23 QXE2181 SEA → GEG Jul 23, 20:00 UTCJul 23, 20:35 UTC35m
2026-07-23 QXE2166 BET → ANC Jul 23, 17:15 UTCJul 23, 18:20 UTC1h 5m
2026-07-23 QXE2161 PDX → BIL Jul 23, 14:45 UTCJul 23, 15:40 UTC55m
2026-07-23 QXE2053 PDX → SEA Jul 23, 12:25 UTCJul 23, 12:45 UTC20m
2026-07-23 QXE2088 SEA → PDX Jul 23, 05:25 UTCJul 23, 05:50 UTC25m
2026-07-23 QXE2335 SFO → PAE Jul 23, 03:05 UTCJul 23, 04:15 UTC1h 10m
2026-07-23 QXE2334 PAE → SFO Jul 23, 01:00 UTCJul 23, 02:15 UTC1h 15m
2026-07-22 QXE2282 GEG → PDX Jul 22, 23:00 UTCJul 22, 23:50 UTC50m
2026-07-22 QXE2255 MSO → PDX Jul 22, 20:20 UTCJul 22, 21:10 UTC50m
2026-07-22 QXE2101 LAX → SFO Jul 22, 17:49 UTCJul 22, 19:06 UTC1h 17m
2026-07-22 QXE2101 LAX → SFO Jul 22, 17:50 UTCJul 22, 19:10 UTC1h 20m
2026-07-22 QXE2100 SEA → PSC Jul 22, 15:35 UTCJul 22, 16:45 UTC1h 10m
2026-07-22 QXE2174 PDX → SFO Jul 22, 13:55 UTCJul 22, 14:35 UTC40m
2026-07-22 QXE2229 PDX → SFO Jul 22, 03:15 UTCJul 22, 04:35 UTC1h 20m
2026-07-22 QXE2082 OAK → SEA Jul 22, 00:55 UTCJul 22, 02:25 UTC1h 30m
2026-07-21 QXE2167 LAX → SJC Jul 21, 23:15 UTCJul 21, 23:45 UTC30m
2026-07-21 QXE2173 SFO → PDX Jul 21, 21:50 UTCJul 21, 22:20 UTC30m
2026-07-21 QXE2216 BOI → SFO Jul 21, 17:45 UTCJul 21, 18:15 UTC30m
2026-07-21 QXE2216 BOI → SFO Jul 21, 17:41 UTCJul 21, 20:01 UTC2h 20m
2026-07-21 QXE2215 SAN → SFO Jul 21, 14:15 UTCJul 21, 16:50 UTC2h 35m
2026-07-21 QXE2098 MFR → PDX Jul 21, 12:21 UTCJul 21, 13:02 UTC41m
2026-07-21 QXE2266 PDX → MFR Jul 21, 05:35 UTCJul 21, 06:20 UTC45m
2026-07-21 QXE2387 SJC → SAN Jul 21, 03:45 UTCJul 21, 04:20 UTC35m
2026-07-20 QXE2132 - Jul 20, 22:00 UTCJul 21, 01:45 UTC3h 44m
2026-07-20 QXE2306 LAX → GEG Jul 20, 20:05 UTCJul 20, 20:40 UTC35m
2026-07-20 QXE2306 LAX → GEG Jul 20, 18:35 UTCJul 20, 19:05 UTC30m
2026-07-20 QXE2166 BET → ANC Jul 20, 16:20 UTCJul 20, 17:25 UTC1h 5m
2026-07-20 QXE2161 PDX → BIL Jul 20, 14:20 UTCJul 20, 15:15 UTC55m

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?
Mode-S A8C489 is currently broadcasting from the ground.
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, QXE2147, QXE2308, QXE2001, QXE2027.