Apparatus

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sensors Mode-S transponder

A8DD2C

ICAO 24-bit transponder address · allocated to United States

Currently assigned to N670QX · operated by HORIZON AIR INDUSTRIES INC

Hex
A8DD2C
Octal
52156454
Decimal
11,066,668
Country
US
Tail
N670QX
No current signal · last broadcast 20d ago
Flights observed
241
Distinct callsigns
20
Country
US
Last broadcast
20d ago

Last known position

Most recent position reported by Mode-S A8DD2C.

Country allocation

The ICAO 24-bit address A8DD2C 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
QXE2306 Horizon Air 7 2026-07-09
QXE2221 Horizon Air 5 2026-07-22
QXE2088 - 4 2026-07-15
QXE2069 - 4 2026-07-10
QXE9993 - 3 2026-06-20
QXE2475 Horizon Air 3 2026-06-29
QXE2471 - 3 2026-06-29
QXE2399 Horizon Air 3 2026-07-23
QXE2364 - 3 2026-07-08
QXE2299 Horizon Air 3 2026-07-09
QXE2268 Horizon Air 3 2026-07-18
QXE2259 - 3 2026-07-15
QXE2191 Horizon Air 3 2026-07-09
QXE2178 Horizon Air 3 2026-07-23
QXE2154 - 3 2026-07-14
QXE2153 - 3 2026-07-14
QXE2152 - 3 2026-07-12
QXE2135 - 3 2026-07-10
QXE2118 Horizon Air 3 2026-06-25
QXE2116 - 3 2026-07-16

Recent flights last 50

DateFlightRouteTakeoffLandingDuration
2026-07-26 QXE2050 FAI → ANC Jul 26, 17:45 UTCJul 26, 22:20 UTC4h 35m
2026-07-26 QXE2316 SJC → LAX Jul 26, 14:30 UTCJul 26, 16:00 UTC1h 30m
2026-07-26 QXE2315 SEA → MSO Jul 26, 01:05 UTCJul 26, 02:55 UTC1h 50m
2026-07-26 QXE2315 SEA → MSO Jul 26, 01:16 UTCJul 26, 02:53 UTC1h 37m
2026-07-25 QXE2081 SEA → SFO Jul 25, 23:05 UTCJul 25, 23:40 UTC35m
2026-07-25 QXE2328 ABQ → PDX Jul 25, 20:45 UTCJul 25, 22:10 UTC1h 25m
2026-07-25 QXE2278 GEG → PDX Jul 25, 16:55 UTCJul 25, 19:30 UTC2h 35m
2026-07-25 QXE2189 SAN → PAE Jul 25, 02:20 UTCJul 25, 04:35 UTC2h 15m
2026-07-25 QXE2406 FAI → ANC Jul 25, 00:00 UTCJul 25, 01:25 UTC1h 25m
2026-07-24 QXE2405 SJC → PDX Jul 24, 21:48 UTCJul 24, 22:53 UTC1h 5m
2026-07-24 QXE2181 SEA → GEG Jul 24, 20:05 UTCJul 24, 20:35 UTC30m
2026-07-24 QXE2141 AUS → SJC Jul 24, 14:10 UTCJul 24, 18:35 UTC4h 25m
2026-07-24 QXE2065 PDX → SFO Jul 24, 12:15 UTCJul 24, 13:00 UTC45m
2026-07-24 QXE2137 PSP → SFO Jul 24, 06:45 UTCJul 24, 07:35 UTC50m
2026-07-24 QXE2182 RDM → SFO Jul 24, 05:50 UTCJul 24, 06:05 UTC15m
2026-07-24 QXE2182 RDM → SFO Jul 24, 04:40 UTCJul 24, 05:00 UTC20m
2026-07-24 QXE2087 PDX → OAK Jul 24, 00:40 UTCJul 24, 01:00 UTC20m
2026-07-23 QXE2087 PDX → OAK Jul 23, 23:25 UTCJul 23, 23:35 UTC10m
2026-07-23 QXE2157 LAS → LAX Jul 23, 21:20 UTCJul 23, 22:25 UTC1h 5m
2026-07-23 QXE2399 SFO → PAE Jul 23, 19:15 UTCJul 23, 20:30 UTC1h 15m
2026-07-23 QXE2399 SFO → PAE Jul 23, 19:11 UTCJul 23, 20:24 UTC1h 13m
2026-07-23 QXE2178 PDX → ONT Jul 23, 16:25 UTCJul 23, 18:05 UTC1h 40m
2026-07-23 QXE2029 LAX → SFO Jul 23, 03:15 UTCJul 23, 05:15 UTC2h 0m
2026-07-23 QXE2021 RDM → SFO Jul 23, 00:55 UTCJul 23, 01:55 UTC1h 0m
2026-07-22 QXE2221 PDX → OAK Jul 22, 23:00 UTCJul 23, 01:00 UTC2h 0m
2026-07-22 QXE2221 PDX → OAK Jul 22, 22:58 UTCJul 22, 23:45 UTC47m
2026-07-22 QXE2157 LAS → LAX Jul 22, 20:35 UTCJul 22, 21:40 UTC1h 5m
2026-07-22 QXE2399 SFO → PAE Jul 22, 18:20 UTCJul 22, 19:35 UTC1h 15m
2026-07-22 QXE2095 SMF → PDX Jul 22, 15:30 UTCJul 22, 16:55 UTC1h 25m
2026-07-22 QXE2156 SFO → PDX Jul 22, 13:10 UTCJul 22, 14:20 UTC1h 10m
2026-07-22 QXE2201 LAX → LAS Jul 22, 03:13 UTCJul 22, 04:23 UTC1h 10m
2026-07-22 QXE2201 LAX → LAS Jul 22, 02:50 UTCJul 22, 04:25 UTC1h 35m
2026-07-21 QXE2329 LAS → LAX Jul 21, 23:45 UTCJul 22, 01:30 UTC1h 45m
2026-07-21 QXE2329 LAS → LAX Jul 21, 23:45 UTCJul 22, 01:18 UTC1h 33m
2026-07-21 QXE2125 SAN → PDX Jul 21, 22:00 UTCJul 21, 22:50 UTC50m
2026-07-21 QXE2042 MSO → PDX Jul 21, 19:10 UTCJul 21, 20:09 UTC59m
2026-07-21 QXE2168 SFO → BUR Jul 21, 15:40 UTCJul 21, 17:40 UTC2h 0m
2026-07-21 QXE2168 SFO → BUR Jul 21, 15:50 UTCJul 21, 17:53 UTC2h 3m
2026-07-21 QXE2267 SEA → OAK Jul 21, 13:20 UTCJul 21, 14:10 UTC50m
2026-07-21 QXE2312 - Jul 21, 06:20 UTCJul 21, 07:00 UTC40m
2026-07-21 QXE2213 PAE → SFO Jul 21, 04:05 UTCJul 21, 05:10 UTC1h 5m
2026-07-21 QXE2113 - Jul 21, 01:00 UTCJul 21, 02:35 UTC1h 35m
2026-07-20 QXE2221 PDX → OAK Jul 20, 19:20 UTCJul 20, 23:50 UTC4h 30m
2026-07-20 QXE2437 - Jul 20, 15:05 UTCJul 20, 17:45 UTC2h 40m
2026-07-20 QXE2083 - Jul 20, 03:25 UTCJul 20, 05:00 UTC1h 35m
2026-07-20 QXE2063 SFO → SAN Jul 20, 00:30 UTCJul 20, 02:15 UTC1h 45m
2026-07-19 QXE2062 OAK → PDX Jul 19, 21:20 UTCJul 19, 22:35 UTC1h 15m
2026-07-19 QXE2062 OAK → PDX Jul 19, 21:31 UTCJul 19, 22:57 UTC1h 26m
2026-07-19 QXE2139 SNA → PDX Jul 19, 18:15 UTCJul 19, 20:15 UTC2h 0m
2026-07-19 QXE2249 PDX → SEA Jul 19, 15:50 UTCJul 19, 17:25 UTC1h 35m

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 N670QX page for operator, model, and routing details .

Mode-S A8DD2C frequently asked

What is Mode-S code A8DD2C?
A8DD2C is an ICAO 24-bit transponder address. Allocated to United States. Assigned to N670QX.
Where is Mode-S A8DD2C registered?
Mode-S code A8DD2C 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 A8DD2C broadcasting right now?
No active broadcast right now. Last signal was 20d ago.
Hex, octal, and decimal Mode-S codes: what's the difference?
The same 24-bit identifier expressed in different bases: hex A8DD2C, octal 52156454, decimal 11,066,668.
What flights does A8DD2C operate?
Mode-S A8DD2C has broadcast 20 distinct callsigns, including QXE2306, QXE2221, QXE2088, QXE2069, QXE9993.