Apparatus

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sensors Mode-S transponder

A8430D

ICAO 24-bit transponder address · allocated to United States

Currently assigned to N631SK · BOMBARDIER Regional Jet CRJ-700 · operated by SKYWEST AIRLINES INC

Hex
A8430D
Octal
52041415
Decimal
11,027,213
Country
US
Tail
N631SK
Type
CRJ7
No current signal · last broadcast Jul 26, 19:45 UTC
Flights observed
669
Distinct callsigns
20
Country
US
Last broadcast
Jul 26, 19:45 UTC

Last known position

Most recent position reported by Mode-S A8430D.

Country allocation

The ICAO 24-bit address A8430D 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
SKW6311 SkyWest Airlines 10 2026-07-23
SKW6439 SkyWest Airlines 9 2026-05-29
SKW5008 SkyWest Airlines 9 2026-05-16
SKW6383 SkyWest Airlines 8 2026-07-26
SKW6352 - 8 2026-07-15
SKW6285 SkyWest Airlines 8 2026-07-17
SKW6238 - 8 2026-07-21
SKW4953 - 8 2026-07-15
SKW6344 SkyWest Airlines 7 2026-07-19
SKW6275 SkyWest Airlines 7 2026-07-24
SKW6274 - 7 2026-07-06
SKW6245 - 7 2026-07-15
SKW4885 - 7 2026-06-24
SKW6488 SkyWest Airlines 6 2026-06-16
SKW6402 SkyWest Airlines 6 2026-05-20
SKW6379 - 6 2026-07-08
SKW6373 SkyWest Airlines 6 2026-07-03
SKW6317 SkyWest Airlines 6 2026-07-24
SKW6291 - 6 2026-07-11
SKW6261 SkyWest Airlines 6 2026-05-25

Recent flights last 50

DateFlightRouteTakeoffLandingDuration
2026-07-26 SKW6383 ORD → OKC Jul 26, 19:05 UTCJul 26, 19:35 UTC30m
2026-07-26 SKW6383 ORD → OKC Jul 26, 17:40 UTCJul 26, 18:00 UTC20m
2026-07-26 SKW6453 YUM → PHX Jul 26, 13:25 UTCJul 26, 15:45 UTC2h 20m
2026-07-26 SKW6452 ORD → FNT Jul 26, 02:45 UTCJul 26, 05:00 UTC2h 15m
2026-07-25 SKW6383 ORD → OKC Jul 25, 19:00 UTCJul 25, 19:30 UTC30m
2026-07-25 SKW6383 ORD → OKC Jul 25, 19:02 UTCJul 25, 19:22 UTC20m
2026-07-25 SKW6383 ORD → OKC Jul 25, 17:35 UTCJul 25, 18:00 UTC25m
2026-07-25 SKW4939 MAF → PHX Jul 25, 14:55 UTCJul 25, 16:05 UTC1h 10m
2026-07-25 SKW4892 DFW → FSM Jul 25, 02:30 UTCJul 25, 03:55 UTC1h 25m
2026-07-24 SKW6235 SLC → PHX Jul 24, 23:30 UTCJul 25, 00:45 UTC1h 15m
2026-07-24 SKW6235 SLC → PHX Jul 24, 21:40 UTCJul 24, 22:40 UTC1h 0m
2026-07-24 SKW4966 DFW → LCH Jul 24, 18:10 UTCJul 24, 18:55 UTC45m
2026-07-24 SKW4966 DFW → LCH Jul 24, 16:15 UTCJul 24, 17:00 UTC45m
2026-07-24 SKW6275 FAT → PHX Jul 24, 13:35 UTCJul 24, 14:50 UTC1h 15m
2026-07-24 SKW6275 FAT → PHX Jul 24, 13:17 UTCJul 24, 14:50 UTC1h 33m
2026-07-24 SKW6317 PHX → FAT Jul 24, 01:05 UTCJul 24, 02:10 UTC1h 5m
2026-07-24 SKW6317 PHX → FAT Jul 24, 01:14 UTCJul 24, 02:16 UTC1h 2m
2026-07-23 SKW6311 LAX → SFO Jul 23, 22:35 UTCJul 23, 23:55 UTC1h 20m
2026-07-23 SKW6311 LAX → SFO Jul 23, 22:40 UTCJul 23, 23:50 UTC1h 10m
2026-07-23 SKW6311 LAX → SFO Jul 23, 20:30 UTCJul 23, 21:35 UTC1h 5m
2026-07-23 SKW4986 ORD → ICT Jul 23, 18:36 UTCJul 23, 19:01 UTC25m
2026-07-23 SKW4986 ORD → ICT Jul 23, 17:20 UTCJul 23, 17:35 UTC15m
2026-07-23 SKW4939 MAF → PHX Jul 23, 14:40 UTCJul 23, 16:05 UTC1h 25m
2026-07-23 SKW4939 MAF → PHX Jul 23, 14:32 UTCJul 23, 16:00 UTC1h 28m
2026-07-23 SKW5013 ORD → LEX Jul 23, 12:45 UTCJul 23, 13:35 UTC50m
2026-07-23 SKW6437 ASE → ORD Jul 23, 00:00 UTCJul 23, 00:45 UTC45m
2026-07-22 SKW6437 ASE → ORD Jul 22, 23:49 UTCJul 23, 00:42 UTC53m
2026-07-22 SKW6437 ASE → ORD Jul 22, 22:25 UTCJul 22, 23:05 UTC40m
2026-07-22 SKW4965 LCH → DFW Jul 22, 19:25 UTCJul 22, 20:55 UTC1h 30m
2026-07-22 SKW4965 LCH → DFW Jul 22, 16:25 UTCJul 22, 17:45 UTC1h 20m
2026-07-22 SKW6414 SLC → ORD Jul 22, 13:10 UTCJul 22, 15:00 UTC1h 50m
2026-07-22 SKW6414 SLC → ORD Jul 22, 13:13 UTCJul 22, 14:57 UTC1h 44m
2026-07-22 SKW6442 ORD → ASE Jul 22, 02:35 UTCJul 22, 04:30 UTC1h 55m
2026-07-22 SKW6442 ORD → ASE Jul 22, 02:33 UTCJul 22, 04:17 UTC1h 44m
2026-07-21 SKW6421 DFW → PVU Jul 21, 23:55 UTCJul 22, 00:45 UTC50m
2026-07-21 SKW6421 DFW → PVU Jul 21, 23:55 UTCJul 22, 00:34 UTC39m
2026-07-21 SKW6421 DFW → PVU Jul 21, 22:05 UTCJul 21, 22:45 UTC40m
2026-07-21 SKW6238 - Jul 21, 19:40 UTCJul 21, 20:50 UTC1h 10m
2026-07-21 SKW6238 - Jul 21, 17:30 UTCJul 21, 18:40 UTC1h 10m
2026-07-21 SKW6503 ORD → RST Jul 21, 13:30 UTCJul 21, 15:05 UTC1h 35m
2026-07-21 SKW6192 - Jul 21, 00:20 UTCJul 21, 01:35 UTC1h 15m
2026-07-21 SKW6192 DFW → DRO Jul 21, 00:19 UTCJul 21, 01:39 UTC1h 20m
2026-07-20 SKW4967 LAX → JAC Jul 20, 22:20 UTCJul 20, 23:10 UTC50m
2026-07-20 SKW4967 LAX → JAC Jul 20, 20:50 UTCJul 20, 21:30 UTC40m
2026-07-20 SKW6288 MHK → ORD Jul 20, 18:15 UTCJul 20, 19:25 UTC1h 10m
2026-07-20 SKW6288 MHK → ORD Jul 20, 16:05 UTCJul 20, 17:05 UTC1h 0m
2026-07-20 SKW6335 SBN → DFW Jul 20, 12:10 UTCJul 20, 14:00 UTC1h 50m
2026-07-20 SKW6305 DFW → SBN Jul 20, 01:20 UTCJul 20, 03:15 UTC1h 55m
2026-07-19 SKW6337 - Jul 19, 22:25 UTCJul 19, 23:20 UTC55m
2026-07-19 SKW6337 DFW → SHV Jul 19, 21:00 UTCJul 19, 21:30 UTC30m

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 N631SK page for operator, model, and routing details .

Mode-S A8430D frequently asked

What is Mode-S code A8430D?
A8430D is an ICAO 24-bit transponder address. Allocated to United States. Assigned to N631SK.
Where is Mode-S A8430D registered?
Mode-S code A8430D 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 A8430D broadcasting right now?
No active broadcast right now. Last signal was Jul 26, 19:45 UTC.
Hex, octal, and decimal Mode-S codes: what's the difference?
The same 24-bit identifier expressed in different bases: hex A8430D, octal 52041415, decimal 11,027,213.
What flights does A8430D operate?
Mode-S A8430D has broadcast 20 distinct callsigns, including SKW6311, SKW6439, SKW5008, SKW6383, SKW6352.