Apparatus

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sensors Mode-S transponder

A67D17

ICAO 24-bit transponder address · allocated to United States

Currently assigned to N517SY · EMBRAER ERJ-170-200 (long wing) · operated by SKYWEST AIRLINES INC

Hex
A67D17
Octal
51476427
Decimal
10,910,999
Country
US
Tail
N517SY
Type
E75L
No current signal · last broadcast Jul 26, 21:40 UTC
Flights observed
669
Distinct callsigns
20
Country
US
Last broadcast
Jul 26, 21:40 UTC

Last known position

Most recent position reported by Mode-S A67D17.

Country allocation

The ICAO 24-bit address A67D17 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
SKW6278 - 17 2026-07-11
SKW6336 SkyWest Airlines 16 2026-07-25
SKW5005 SkyWest Airlines 16 2026-07-25
SKW6409 SkyWest Airlines 14 2026-07-26
SKW6283 SkyWest Airlines 14 2026-04-28
SKW4925 SkyWest Airlines 14 2026-07-21
SKW6330 SkyWest Airlines 13 2026-07-24
SKW6185 - 13 2026-07-10
SKW4962 SkyWest Airlines 13 2026-07-24
SKW6404 SkyWest Airlines 12 2026-07-20
SKW6307 - 12 2026-07-10
SKW6188 SkyWest Airlines 12 2026-07-25
SKW4983 SkyWest Airlines 12 2026-07-21
SKW6368 - 11 2026-07-07
SKW6221 SkyWest Airlines 11 2026-07-24
SKW4951 SkyWest Airlines 11 2026-07-24
SKW4982 SkyWest Airlines 10 2026-07-21
SKW265W SkyWest Airlines 9 2026-05-15
SKW6475 - 8 2026-06-24
SKW6460 SkyWest Airlines 8 2026-05-06

Recent flights last 50

DateFlightRouteTakeoffLandingDuration
2026-07-26 SKW6409 ORD → DTW Jul 26, 20:40 UTCJul 26, 21:40 UTC1h 0m
2026-07-26 SKW6409 ORD → DTW Jul 26, 16:15 UTCJul 26, 19:05 UTC2h 50m
2026-07-26 SKW4919 SBA → PHX Jul 26, 13:10 UTCJul 26, 14:40 UTC1h 30m
2026-07-26 SKW296Y LAX → ABQ Jul 26, 03:20 UTCJul 26, 05:00 UTC1h 40m
2026-07-26 SKW296Y LAX → ABQ Jul 26, 03:23 UTCJul 26, 04:59 UTC1h 36m
2026-07-26 SKW4946 ORD → BUF Jul 26, 01:35 UTCJul 26, 02:20 UTC45m
2026-07-25 SKW6190 ORD → DTW Jul 25, 23:30 UTCJul 26, 00:25 UTC55m
2026-07-25 SKW6188 ORD → DTW Jul 25, 21:35 UTCJul 25, 22:35 UTC1h 0m
2026-07-25 SKW6188 ORD → DTW Jul 25, 21:24 UTCJul 25, 22:30 UTC1h 6m
2026-07-25 SKW6188 ORD → DTW Jul 25, 19:35 UTCJul 25, 20:30 UTC55m
2026-07-25 SKW6336 PHX → ICT Jul 25, 16:25 UTCJul 25, 17:25 UTC1h 0m
2026-07-25 SKW6336 PHX → ICT Jul 25, 16:24 UTCJul 25, 17:27 UTC1h 3m
2026-07-25 SKW6336 PHX → ICT Jul 25, 14:35 UTCJul 25, 15:30 UTC55m
2026-07-25 SKW5005 PHX → STS Jul 25, 01:50 UTCJul 25, 04:45 UTC2h 55m
2026-07-24 SKW5005 PHX → STS Jul 24, 21:50 UTCJul 25, 00:45 UTC2h 55m
2026-07-24 SKW6330 BTV → ORD Jul 24, 19:20 UTCJul 24, 20:15 UTC55m
2026-07-24 SKW6330 BTV → ORD Jul 24, 19:17 UTCJul 24, 20:14 UTC57m
2026-07-24 SKW6330 BTV → ORD Jul 24, 17:15 UTCJul 24, 18:10 UTC55m
2026-07-24 SKW4951 BNA → ORD Jul 24, 12:15 UTCJul 24, 14:55 UTC2h 40m
2026-07-24 SKW4962 LAX → SAT Jul 24, 02:05 UTCJul 24, 04:45 UTC2h 40m
2026-07-24 SKW6221 FAT → PHX Jul 24, 00:00 UTCJul 24, 00:55 UTC55m
2026-07-23 SKW6221 FAT → PHX Jul 23, 21:55 UTCJul 23, 22:50 UTC55m
2026-07-23 SKW4887 RNO → LAX Jul 23, 18:20 UTCJul 23, 19:50 UTC1h 30m
2026-07-23 SKW4887 RNO → LAX Jul 23, 18:17 UTCJul 23, 19:49 UTC1h 32m
2026-07-23 SKW4887 RNO → LAX Jul 23, 15:50 UTCJul 23, 17:30 UTC1h 40m
2026-07-23 SKW6393 TUS → LAX Jul 23, 13:10 UTCJul 23, 14:15 UTC1h 5m
2026-07-23 SKW6315 LAX → ABQ Jul 23, 03:10 UTCJul 23, 04:30 UTC1h 20m
2026-07-23 SKW6315 LAX → ABQ Jul 23, 03:09 UTCJul 23, 04:18 UTC1h 9m
2026-07-23 SKW6270 LAX → SFO Jul 23, 00:00 UTCJul 23, 02:20 UTC2h 20m
2026-07-22 SKW6270 LAX → SFO Jul 22, 20:45 UTCJul 22, 22:35 UTC1h 50m
2026-07-22 SKW6428 PHX → SLC Jul 22, 18:50 UTCJul 22, 19:50 UTC1h 0m
2026-07-22 SKW6428 PHX → SLC Jul 22, 18:49 UTCJul 22, 19:48 UTC59m
2026-07-22 SKW4911 DFW → DRO Jul 22, 15:50 UTCJul 22, 17:25 UTC1h 35m
2026-07-22 SKW6415 LCH → DFW Jul 22, 00:05 UTCJul 22, 01:10 UTC1h 5m
2026-07-21 SKW6415 LCH → DFW Jul 21, 21:50 UTCJul 21, 22:55 UTC1h 5m
2026-07-21 SKW4925 PHX → HMO Jul 21, 19:30 UTCJul 21, 20:25 UTC55m
2026-07-21 SKW4925 PHX → HMO Jul 21, 17:30 UTCJul 21, 18:30 UTC1h 0m
2026-07-21 SKW4983 CID → PHX Jul 21, 13:05 UTCJul 21, 16:10 UTC3h 5m
2026-07-21 SKW4982 STL → DFW Jul 21, 02:30 UTCJul 21, 05:15 UTC2h 45m
2026-07-20 SKW6220 BFL → PHX Jul 20, 22:45 UTCJul 21, 01:10 UTC2h 24m
2026-07-20 SKW6220 BFL → PHX Jul 20, 18:40 UTCJul 20, 20:40 UTC2h 0m
2026-07-20 SKW6404 SFO → PHX Jul 20, 13:00 UTCJul 20, 14:45 UTC1h 45m
2026-07-20 SKW6260 - Jul 20, 05:50 UTCJul 20, 06:40 UTC50m
2026-07-20 SKW6260 LAX → SFO Jul 20, 05:46 UTCJul 20, 06:43 UTC57m
2026-07-20 SKW4971 DFW → LRD Jul 20, 00:00 UTCJul 20, 03:10 UTC3h 10m
2026-07-19 SKW4971 DFW → LRD Jul 19, 19:45 UTCJul 19, 22:50 UTC3h 5m
2026-07-19 SKW6425 MAF → DFW Jul 19, 17:25 UTCJul 19, 18:05 UTC40m
2026-07-19 SKW6425 MAF → DFW Jul 19, 15:20 UTCJul 19, 16:05 UTC45m
2026-07-19 SKW5005 PHX → STS Jul 19, 01:30 UTCJul 19, 04:30 UTC3h 0m
2026-07-18 SKW5005 PHX → STS Jul 18, 21:20 UTCJul 19, 00:25 UTC3h 5m

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 N517SY page for operator, model, and routing details .

Mode-S A67D17 frequently asked

What is Mode-S code A67D17?
A67D17 is an ICAO 24-bit transponder address. Allocated to United States. Assigned to N517SY.
Where is Mode-S A67D17 registered?
Mode-S code A67D17 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 A67D17 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 A67D17, octal 51476427, decimal 10,910,999.
What flights does A67D17 operate?
Mode-S A67D17 has broadcast 20 distinct callsigns, including SKW6278, SKW6336, SKW5005, SKW6409, SKW6283.