Apparatus

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sensors Mode-S transponder

A85CE8

ICAO 24-bit transponder address · allocated to United States

Currently assigned to N638QX · EMBRAER ERJ-170-200 (long wing) · operated by HORIZON AIR INDUSTRIES INC

Hex
A85CE8
Octal
52056350
Decimal
11,033,832
Country
US
Tail
N638QX
Type
E75L
No current signal · last broadcast Jul 26, 22:00 UTC
Flights observed
773
Distinct callsigns
20
Country
US
Last broadcast
Jul 26, 22:00 UTC

Last known position

Most recent position reported by Mode-S A85CE8.

Country allocation

The ICAO 24-bit address A85CE8 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
QXE2117 - 12 2026-07-03
QXE2416 - 10 2026-07-20
QXE2288 - 9 2026-07-20
QXE2281 - 9 2026-07-20
QXE2003 - 9 2026-07-08
QXE2420 - 8 2026-07-24
QXE2285 - 8 2026-07-18
QXE2137 - 8 2026-07-12
QXE2329 Horizon Air 7 2026-06-26
QXE2210 - 7 2026-07-16
QXE2087 - 7 2026-07-11
QXE2049 Horizon Air 7 2026-07-21
QXE2341 - 6 2026-07-05
QXE2320 - 6 2026-07-21
QXE2252 - 6 2026-07-16
QXE2182 - 6 2026-07-12
QXE2098 Horizon Air 6 2026-07-24
QXE2050 - 6 2026-07-12
QXE2028 Horizon Air 6 2026-07-20
QXE2024 Horizon Air 6 2026-07-20

Recent flights last 50

DateFlightRouteTakeoffLandingDuration
2026-07-26 QXE2323 PDX → BZN Jul 26, 20:25 UTCJul 26, 22:00 UTC1h 35m
2026-07-26 QXE2324 BOI → SJC Jul 26, 17:35 UTCJul 26, 19:20 UTC1h 45m
2026-07-26 QXE2075 RDM → LAX Jul 26, 14:10 UTCJul 26, 16:00 UTC1h 50m
2026-07-26 QXE2075 RDM → LAX Jul 26, 14:05 UTCJul 26, 15:56 UTC1h 51m
2026-07-26 QXE2094 SEA → SMF Jul 26, 06:05 UTCJul 26, 06:45 UTC41m
2026-07-26 QXE2066 SBP → SEA Jul 26, 03:00 UTCJul 26, 04:50 UTC1h 50m
2026-07-26 QXE2064 PDX → SEA Jul 26, 00:05 UTCJul 26, 02:10 UTC2h 5m
2026-07-25 QXE2376 SMF → SEA Jul 25, 19:05 UTCJul 25, 20:40 UTC1h 35m
2026-07-25 QXE2375 GEG → SFO Jul 25, 16:10 UTCJul 25, 18:00 UTC1h 50m
2026-07-25 QXE2347 YVR → PDX Jul 25, 13:35 UTCJul 25, 13:55 UTC20m
2026-07-25 QXE2347 YVR → PDX Jul 25, 13:24 UTCJul 25, 13:41 UTC17m
2026-07-25 QXE2346 PDX → SEA Jul 25, 06:55 UTCJul 25, 07:10 UTC15m
2026-07-25 QXE2346 PDX → SEA Jul 25, 06:41 UTCJul 25, 07:21 UTC40m
2026-07-25 QXE2066 SBP → SEA Jul 25, 03:45 UTCJul 25, 05:35 UTC1h 50m
2026-07-25 QXE2064 PDX → SEA Jul 25, 00:35 UTCJul 25, 02:45 UTC2h 10m
2026-07-24 QXE2275 SJC → PDX Jul 24, 22:55 UTCJul 24, 23:20 UTC25m
2026-07-24 QXE2155 SAN → PAE Jul 24, 21:30 UTCJul 24, 21:45 UTC15m
2026-07-24 QXE2155 SAN → PAE Jul 24, 20:57 UTCJul 24, 21:53 UTC56m
2026-07-24 QXE2241 PAE → SFO Jul 24, 18:50 UTCJul 24, 19:10 UTC20m
2026-07-24 QXE2048 PDX → SFO Jul 24, 17:15 UTCJul 24, 17:40 UTC25m
2026-07-24 QXE2048 PDX → SFO Jul 24, 17:12 UTCJul 24, 17:45 UTC33m
2026-07-24 QXE2420 - Jul 24, 14:35 UTCJul 24, 15:10 UTC35m
2026-07-24 QXE2098 MFR → PDX Jul 24, 12:20 UTCJul 24, 13:00 UTC40m
2026-07-24 QXE2098 MFR → PDX Jul 24, 12:28 UTCJul 24, 12:58 UTC30m
2026-07-24 QXE2461 SEA → MFR Jul 24, 05:50 UTCJul 24, 07:00 UTC1h 10m
2026-07-24 QXE2040 HLN → SEA Jul 24, 03:10 UTCJul 24, 04:05 UTC55m
2026-07-24 QXE2037 BOI → BUR Jul 24, 01:05 UTCJul 24, 02:20 UTC1h 15m
2026-07-23 QXE2015 GEG → BOI Jul 23, 23:30 UTCJul 23, 23:55 UTC25m
2026-07-23 QXE2006 OAK → PDX Jul 23, 21:40 UTCJul 23, 22:10 UTC30m
2026-07-23 QXE2145 FAI → ANC Jul 23, 18:05 UTCJul 23, 19:25 UTC1h 20m
2026-07-23 QXE2144 SJC → PDX Jul 23, 15:45 UTCJul 23, 16:55 UTC1h 10m
2026-07-23 QXE2046 EUG → SEA Jul 23, 13:10 UTCJul 23, 13:55 UTC45m
2026-07-23 QXE2047 SEA → EUG Jul 23, 06:00 UTCJul 23, 06:55 UTC55m
2026-07-23 QXE2128 SEA → SFO Jul 23, 02:00 UTCJul 23, 03:45 UTC1h 45m
2026-07-22 QXE2129 SEA → SFO Jul 22, 23:15 UTCJul 23, 01:10 UTC1h 55m
2026-07-22 QXE2400 SEA → GEG Jul 22, 21:15 UTCJul 22, 21:55 UTC40m
2026-07-22 QXE2400 SEA → GEG Jul 22, 19:35 UTCJul 22, 20:20 UTC45m
2026-07-22 QXE2076 SAN → SFO Jul 22, 17:50 UTCJul 22, 18:30 UTC40m
2026-07-22 QXE2076 SAN → SFO Jul 22, 17:48 UTCJul 22, 18:24 UTC36m
2026-07-22 QXE2079 SEA → OAK Jul 22, 15:17 UTCJul 22, 15:50 UTC33m
2026-07-22 QXE2079 SEA → OAK Jul 22, 15:10 UTCJul 22, 16:00 UTC50m
2026-07-22 QXE2046 EUG → SEA Jul 22, 13:10 UTCJul 22, 13:50 UTC40m
2026-07-22 QXE2046 EUG → SEA Jul 22, 13:19 UTCJul 22, 13:45 UTC26m
2026-07-22 QXE2088 SEA → PDX Jul 22, 04:50 UTCJul 22, 05:15 UTC25m
2026-07-22 QXE2335 SFO → PAE Jul 22, 02:25 UTCJul 22, 03:30 UTC1h 5m
2026-07-22 QXE2334 PAE → SFO Jul 22, 00:10 UTCJul 22, 01:25 UTC1h 15m
2026-07-21 QXE2320 - Jul 21, 20:15 UTCJul 21, 23:05 UTC2h 50m
2026-07-21 QXE2320 TUL → SAN Jul 21, 20:13 UTCJul 21, 23:01 UTC2h 48m
2026-07-21 QXE2321 LAX → SEA Jul 21, 16:35 UTCJul 21, 19:25 UTC2h 50m
2026-07-21 QXE2045 LAX → MFR Jul 21, 14:25 UTCJul 21, 15:15 UTC50m

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 N638QX page for operator, model, and routing details .

Mode-S A85CE8 frequently asked

What is Mode-S code A85CE8?
A85CE8 is an ICAO 24-bit transponder address. Allocated to United States. Assigned to N638QX.
Where is Mode-S A85CE8 registered?
Mode-S code A85CE8 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 A85CE8 broadcasting right now?
No active broadcast right now. Last signal was Jul 26, 22:00 UTC.
Hex, octal, and decimal Mode-S codes: what's the difference?
The same 24-bit identifier expressed in different bases: hex A85CE8, octal 52056350, decimal 11,033,832.
What flights does A85CE8 operate?
Mode-S A85CE8 has broadcast 20 distinct callsigns, including QXE2117, QXE2416, QXE2288, QXE2281, QXE2003.