Apparatus

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sensors Mode-S transponder

A817B1

ICAO 24-bit transponder address · allocated to United States

Currently assigned to N620QX · EMBRAER ERJ-170-200 (long wing) · operated by HORIZON AIR INDUSTRIES INC

Hex
A817B1
Octal
52013661
Decimal
11,016,113
Country
US
Tail
N620QX
Type
E75L
No current signal · last broadcast Jul 26, 21:40 UTC
Flights observed
827
Distinct callsigns
20
Country
US
Last broadcast
Jul 26, 21:40 UTC

Last known position

Most recent position reported by Mode-S A817B1.

Country allocation

The ICAO 24-bit address A817B1 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
QXE2099 Horizon Air 9 2026-05-31
QXE2086 - 9 2026-07-22
QXE2346 - 8 2026-07-10
QXE2333 Horizon Air 8 2026-07-26
QXE2148 - 8 2026-06-26
QXE2100 - 8 2026-07-20
QXE2067 - 8 2026-06-23
QXE2275 - 7 2026-06-18
QXE2171 - 7 2026-07-24
QXE2160 Horizon Air 7 2026-06-06
QXE2101 - 7 2026-07-20
QXE2364 - 6 2026-06-23
QXE2295 Horizon Air 6 2026-06-07
QXE2262 - 6 2026-06-24
QXE2221 - 6 2026-07-18
QXE2175 - 6 2026-07-20
QXE2121 - 6 2026-06-22
QXE2088 - 6 2026-07-17
QXE2444 Horizon Air 5 2026-05-03
QXE2415 Horizon Air 5 2026-07-22

Recent flights last 50

DateFlightRouteTakeoffLandingDuration
2026-07-26 QXE2205 RNO → LAX Jul 26, 21:00 UTCJul 26, 21:35 UTC35m
2026-07-26 QXE2333 SFO → SAN Jul 26, 17:40 UTCJul 26, 19:15 UTC1h 35m
2026-07-26 QXE2333 SFO → SAN Jul 26, 17:40 UTCJul 26, 19:09 UTC1h 29m
2026-07-26 QXE2333 SFO → SAN Jul 26, 15:00 UTCJul 26, 16:25 UTC1h 25m
2026-07-26 QXE2304 YVR → SEA Jul 26, 01:10 UTCJul 26, 02:20 UTC1h 10m
2026-07-25 QXE2035 LAX → PDX Jul 25, 22:20 UTCJul 25, 23:55 UTC1h 35m
2026-07-25 QXE2035 LAX → PDX Jul 25, 22:17 UTCJul 25, 23:52 UTC1h 35m
2026-07-25 QXE2003 SEA → OAK Jul 25, 20:10 UTCJul 25, 21:00 UTC50m
2026-07-25 QXE2003 SEA → OAK Jul 25, 20:10 UTCJul 25, 20:53 UTC43m
2026-07-25 QXE2225 - Jul 25, 18:10 UTCJul 25, 18:55 UTC45m
2026-07-25 QXE2184 SEA → SJC Jul 25, 15:20 UTCJul 25, 16:20 UTC1h 0m
2026-07-25 QXE2198 LAS → PAE Jul 25, 13:00 UTCJul 25, 13:55 UTC55m
2026-07-25 QXE2071 SFO → BOI Jul 25, 04:50 UTCJul 25, 05:30 UTC40m
2026-07-25 QXE2084 PAE → SFO Jul 25, 01:25 UTCJul 25, 03:15 UTC1h 50m
2026-07-24 QXE2353 PSP → SFO Jul 24, 23:10 UTCJul 25, 00:05 UTC55m
2026-07-24 QXE2000 ANC → OTZ Jul 24, 21:30 UTCJul 24, 21:55 UTC25m
2026-07-24 QXE2001 PSP → SFO Jul 24, 20:05 UTCJul 24, 20:20 UTC15m
2026-07-24 QXE2171 - Jul 24, 18:25 UTCJul 24, 19:05 UTC40m
2026-07-24 QXE2171 PSC → SEA Jul 24, 18:22 UTCJul 24, 18:51 UTC29m
2026-07-24 QXE2195 SEA → BIL Jul 24, 17:00 UTCJul 24, 17:30 UTC30m
2026-07-24 QXE2027 PDX → SFO Jul 24, 14:25 UTCJul 24, 15:15 UTC50m
2026-07-24 QXE2057 SJC → PDX Jul 24, 05:05 UTCJul 24, 05:35 UTC30m
2026-07-24 QXE2057 SJC → PDX Jul 24, 05:00 UTCJul 24, 05:30 UTC30m
2026-07-24 QXE2456 SEA → SFO Jul 24, 01:25 UTCJul 24, 03:20 UTC1h 55m
2026-07-23 QXE2093 PDX → SEA Jul 23, 22:00 UTCJul 24, 00:10 UTC2h 10m
2026-07-23 QXE2333 SFO → SAN Jul 23, 17:44 UTCJul 23, 19:14 UTC1h 30m
2026-07-23 QXE2333 SFO → SAN Jul 23, 17:45 UTCJul 23, 19:20 UTC1h 35m
2026-07-23 QXE2333 SFO → SAN Jul 23, 15:00 UTCJul 23, 16:30 UTC1h 30m
2026-07-23 QXE2043 PDX → SBP Jul 23, 12:30 UTCJul 23, 12:55 UTC25m
2026-07-23 QXE2223 SJC → BOI Jul 23, 03:30 UTCJul 23, 05:20 UTC1h 50m
2026-07-23 QXE2296 RNO → LAS Jul 23, 01:50 UTCJul 23, 02:40 UTC50m
2026-07-22 QXE2260 SFO → SNA Jul 22, 23:40 UTCJul 23, 00:25 UTC45m
2026-07-22 QXE2415 SFO → PSP Jul 22, 20:20 UTCJul 22, 22:35 UTC2h 15m
2026-07-22 QXE2086 SAN → RDM Jul 22, 17:20 UTCJul 22, 19:15 UTC1h 55m
2026-07-22 QXE2290 - Jul 22, 15:00 UTCJul 22, 16:20 UTC1h 20m
2026-07-22 QXE2289 MFR → SEA Jul 22, 04:30 UTCJul 22, 05:38 UTC1h 8m
2026-07-22 QXE2289 MFR → SEA Jul 22, 04:30 UTCJul 22, 05:25 UTC55m
2026-07-22 QXE2058 SNA → PDX Jul 22, 02:10 UTCJul 22, 03:30 UTC1h 20m
2026-07-21 QXE2314 SAN → SFO Jul 21, 23:40 UTCJul 22, 00:50 UTC1h 10m
2026-07-21 QXE2050 FAI → ANC Jul 21, 20:30 UTCJul 21, 22:35 UTC2h 5m
2026-07-21 QXE2022 - Jul 21, 17:40 UTCJul 21, 18:15 UTC35m
2026-07-21 QXE2022 PDX → BZN Jul 21, 17:46 UTCJul 21, 18:49 UTC1h 3m
2026-07-21 QXE2002 YVR → PDX Jul 21, 15:45 UTCJul 21, 16:35 UTC50m
2026-07-21 QXE2002 - Jul 21, 15:50 UTCJul 21, 16:40 UTC50m
2026-07-21 QXE2228 PAE → SFO Jul 21, 05:15 UTCJul 21, 06:05 UTC50m
2026-07-21 QXE2228 PAE → SFO Jul 21, 05:09 UTCJul 21, 06:02 UTC53m
2026-07-21 QXE2335 SFO → PAE Jul 21, 02:55 UTCJul 21, 04:00 UTC1h 5m
2026-07-21 QXE2334 PAE → SFO Jul 21, 00:50 UTCJul 21, 02:05 UTC1h 15m
2026-07-20 QXE2282 GEG → PDX Jul 20, 22:50 UTCJul 20, 23:35 UTC45m
2026-07-20 QXE2255 - Jul 20, 20:00 UTCJul 20, 20:55 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 N620QX page for operator, model, and routing details .

Mode-S A817B1 frequently asked

What is Mode-S code A817B1?
A817B1 is an ICAO 24-bit transponder address. Allocated to United States. Assigned to N620QX.
Where is Mode-S A817B1 registered?
Mode-S code A817B1 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 A817B1 broadcasting right now?
No active broadcast right now. Last signal was Jul 26, 21:40 UTC.
Hex, octal, and decimal Mode-S codes: what's the difference?
The same 24-bit identifier expressed in different bases: hex A817B1, octal 52013661, decimal 11,016,113.
What flights does A817B1 operate?
Mode-S A817B1 has broadcast 20 distinct callsigns, including QXE2099, QXE2086, QXE2346, QXE2333, QXE2148.