Apparatus

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sensors Mode-S transponder

A8758B

ICAO 24-bit transponder address · allocated to United States

Currently assigned to N644QX · EMBRAER ERJ-170-200 (long wing) · operated by HORIZON AIR INDUSTRIES INC

Hex
A8758B
Octal
52072613
Decimal
11,040,139
Country
US
Tail
N644QX
Type
E75L
No current signal · last broadcast Jul 26, 22:30 UTC
Flights observed
793
Distinct callsigns
20
Country
US
Last broadcast
Jul 26, 22:30 UTC

Last known position

Most recent position reported by Mode-S A8758B.

Country allocation

The ICAO 24-bit address A8758B 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
QXE2160 Horizon Air 12 2026-06-04
QXE2001 - 10 2026-07-19
QXE2456 - 9 2026-07-18
QXE2210 - 9 2026-07-15
QXE2144 Horizon Air 8 2026-07-25
QXE2405 - 7 2026-07-12
QXE2306 Horizon Air 7 2026-07-21
QXE2166 Horizon Air 7 2026-07-21
QXE2060 Horizon Air 7 2026-06-01
QXE2007 - 7 2026-07-19
QXE2274 - 6 2026-07-15
QXE2269 - 6 2026-07-01
QXE2268 - 6 2026-07-01
QXE2186 - 6 2026-07-12
QXE2177 - 6 2026-07-15
QXE2171 Horizon Air 6 2026-06-02
QXE2046 Horizon Air 6 2026-07-25
QXE2006 Horizon Air 6 2026-07-18
QXE2004 - 6 2026-07-02
QXE2459 - 5 2026-07-14

Recent flights last 50

DateFlightRouteTakeoffLandingDuration
2026-07-26 QXE2328 ABQ → PDX Jul 26, 21:05 UTCJul 26, 22:25 UTC1h 20m
2026-07-26 QXE2278 GEG → PDX Jul 26, 16:50 UTCJul 26, 19:25 UTC2h 35m
2026-07-26 QXE2116 SNA → PAE Jul 26, 03:10 UTCJul 26, 05:25 UTC2h 15m
2026-07-25 QXE2019 SEA → PDX Jul 25, 23:40 UTCJul 26, 02:15 UTC2h 35m
2026-07-25 QXE2180 SAN → SFO Jul 25, 21:55 UTCJul 25, 22:35 UTC40m
2026-07-25 QXE2145 FAI → ANC Jul 25, 18:25 UTCJul 25, 19:45 UTC1h 20m
2026-07-25 QXE2145 FAI → ANC Jul 25, 18:20 UTCJul 25, 19:40 UTC1h 20m
2026-07-25 QXE2144 SJC → PDX Jul 25, 16:27 UTCJul 25, 17:20 UTC53m
2026-07-25 QXE2144 SJC → PDX Jul 25, 16:15 UTCJul 25, 16:45 UTC30m
2026-07-25 QXE2046 PHX → SFO Jul 25, 14:20 UTCJul 25, 15:10 UTC50m
2026-07-25 QXE2088 SEA → PDX Jul 25, 06:00 UTCJul 25, 06:25 UTC25m
2026-07-24 QXE2256 PDX → OAK Jul 24, 18:40 UTCJul 24, 20:00 UTC1h 20m
2026-07-24 QXE2080 ANC → PDX Jul 24, 16:00 UTCJul 24, 17:40 UTC1h 40m
2026-07-24 QXE2043 PDX → SBP Jul 24, 12:30 UTCJul 24, 13:00 UTC30m
2026-07-24 QXE2043 PDX → SBP Jul 24, 12:28 UTCJul 24, 13:08 UTC40m
2026-07-24 QXE2223 SJC → BOI Jul 24, 03:25 UTCJul 24, 05:10 UTC1h 45m
2026-07-24 QXE2296 RNO → LAS Jul 24, 01:30 UTCJul 24, 02:20 UTC50m
2026-07-23 QXE2260 SFO → SNA Jul 23, 23:25 UTCJul 24, 00:05 UTC40m
2026-07-23 QXE2176 AKN → ANC Jul 23, 21:15 UTCJul 23, 21:55 UTC40m
2026-07-23 QXE2176 AKN → ANC Jul 23, 21:10 UTCJul 23, 21:54 UTC44m
2026-07-23 QXE2317 PAE → SFO Jul 23, 18:15 UTCJul 23, 20:15 UTC2h 0m
2026-07-23 QXE2317 PAE → SFO Jul 23, 18:15 UTCJul 23, 20:14 UTC1h 59m
2026-07-23 QXE2398 SMF → SAN Jul 23, 13:20 UTCJul 23, 16:35 UTC3h 15m
2026-07-23 QXE2192 PDX → ANC Jul 23, 04:50 UTCJul 23, 08:30 UTC3h 40m
2026-07-23 QXE2372 LAX → SFO Jul 23, 03:15 UTCJul 23, 03:55 UTC40m
2026-07-22 QXE2132 SEA → SFO Jul 22, 23:40 UTCJul 23, 00:50 UTC1h 10m
2026-07-22 QXE2131 PDX → GEG Jul 22, 21:35 UTCJul 22, 22:25 UTC50m
2026-07-22 QXE2131 PDX → GEG Jul 22, 21:29 UTCJul 22, 22:35 UTC1h 6m
2026-07-22 QXE2133 PDX → SFO Jul 22, 18:30 UTCJul 22, 20:20 UTC1h 50m
2026-07-22 QXE2133 PDX → SFO Jul 22, 18:34 UTCJul 22, 20:12 UTC1h 38m
2026-07-22 QXE2068 SFO → PAE Jul 22, 15:30 UTCJul 22, 17:35 UTC2h 5m
2026-07-22 QXE2148 LAX → SFO Jul 22, 12:10 UTCJul 22, 13:30 UTC1h 20m
2026-07-22 QXE2148 LAX → SFO Jul 22, 12:09 UTCJul 22, 13:26 UTC1h 17m
2026-07-22 QXE2147 SFO → LAX Jul 22, 04:05 UTCJul 22, 05:10 UTC1h 5m
2026-07-21 QXE2191 SAN → SFO Jul 21, 22:30 UTCJul 22, 01:20 UTC2h 50m
2026-07-21 QXE2306 LAX → GEG Jul 21, 20:10 UTCJul 21, 20:45 UTC35m
2026-07-21 QXE2306 LAX → GEG Jul 21, 20:08 UTCJul 21, 20:39 UTC31m
2026-07-21 QXE2306 LAX → GEG Jul 21, 18:40 UTCJul 21, 19:15 UTC35m
2026-07-21 QXE2166 BET → ANC Jul 21, 16:10 UTCJul 21, 17:20 UTC1h 10m
2026-07-21 QXE2161 PDX → BIL Jul 21, 14:10 UTCJul 21, 15:05 UTC55m
2026-07-21 QXE2161 PDX → BIL Jul 21, 14:08 UTCJul 21, 15:06 UTC58m
2026-07-21 QXE2053 PDX → SEA Jul 21, 12:25 UTCJul 21, 12:50 UTC25m
2026-07-21 QXE2047 - Jul 21, 06:15 UTCJul 21, 07:00 UTC45m
2026-07-21 QXE2313 - Jul 21, 03:15 UTCJul 21, 03:40 UTC25m
2026-07-21 QXE2302 SEA → PDX Jul 21, 01:15 UTCJul 21, 01:50 UTC35m
2026-07-21 QXE2302 SEA → PDX Jul 21, 01:23 UTCJul 21, 01:43 UTC20m
2026-07-20 QXE2110 SAN → SFO Jul 20, 23:10 UTCJul 21, 00:15 UTC1h 5m
2026-07-20 QXE2105 SFO → SEA Jul 20, 21:10 UTCJul 20, 21:55 UTC45m
2026-07-20 QXE2262 RDM → SEA Jul 20, 19:00 UTCJul 20, 19:45 UTC45m
2026-07-20 QXE2200 RDM → SEA Jul 20, 17:25 UTCJul 20, 18:05 UTC40m

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 N644QX page for operator, model, and routing details .

Mode-S A8758B frequently asked

What is Mode-S code A8758B?
A8758B is an ICAO 24-bit transponder address. Allocated to United States. Assigned to N644QX.
Where is Mode-S A8758B registered?
Mode-S code A8758B 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 A8758B broadcasting right now?
No active broadcast right now. Last signal was Jul 26, 22:30 UTC.
Hex, octal, and decimal Mode-S codes: what's the difference?
The same 24-bit identifier expressed in different bases: hex A8758B, octal 52072613, decimal 11,040,139.
What flights does A8758B operate?
Mode-S A8758B has broadcast 20 distinct callsigns, including QXE2160, QXE2001, QXE2456, QXE2210, QXE2144.