Apparatus

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sensors Mode-S transponder

A34FE6

ICAO 24-bit transponder address · allocated to United States

Currently assigned to N312SY · operated by SKYWEST AIRLINES INC

Hex
A34FE6
Octal
50647746
Decimal
10,702,822
Country
US
Tail
N312SY
Type
E75L
No current signal · last broadcast Jul 26, 20:45 UTC
Flights observed
703
Distinct callsigns
20
Country
US
Last broadcast
Jul 26, 20:45 UTC

Last known position

Most recent position reported by Mode-S A34FE6.

Country allocation

The ICAO 24-bit address A34FE6 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
SKW4121 - 12 2026-06-27
SKW197F - 11 2026-07-06
SKW4026 - 10 2026-07-19
SKW3989 SkyWest Airlines 10 2026-05-28
SKW135K - 10 2026-07-08
SKW4063 - 9 2026-07-13
SKW3660 - 9 2026-07-08
SKW4070 SkyWest Airlines 8 2026-07-24
SKW4005 - 8 2026-07-02
SKW3926 SkyWest Airlines 8 2026-05-20
SKW3560 SkyWest Airlines 8 2026-05-25
SKW3501 SkyWest Airlines 8 2026-05-23
SKW157E - 8 2026-07-06
SKW4177 - 7 2026-06-26
SKW4105 SkyWest Airlines 7 2026-06-01
SKW3958 SkyWest Airlines 7 2026-07-25
SKW3950 - 7 2026-07-13
SKW3783 SkyWest Airlines 7 2026-05-31
SKW3750 SkyWest Airlines 7 2026-04-25
SKW3585 SkyWest Airlines 7 2026-07-18

Recent flights last 50

DateFlightRouteTakeoffLandingDuration
2026-07-26 SKW3744 LAX → OAK Jul 26, 19:40 UTCJul 26, 20:45 UTC1h 5m
2026-07-26 SKW3680 IAD → MSP Jul 26, 15:55 UTCJul 26, 18:35 UTC2h 40m
2026-07-26 SKW118R BOI → SEA Jul 26, 13:05 UTCJul 26, 14:10 UTC1h 5m
2026-07-26 SKW118R BOI → SEA Jul 26, 13:05 UTCJul 26, 14:10 UTC1h 5m
2026-07-26 SKW3688 DTW → CMH Jul 26, 00:00 UTCJul 26, 00:55 UTC55m
2026-07-25 SKW3958 SLC → PSC Jul 25, 21:35 UTCJul 25, 22:40 UTC1h 5m
2026-07-25 SKW3958 SLC → PSC Jul 25, 21:40 UTCJul 25, 22:38 UTC58m
2026-07-25 SKW3773 SEA → SMF Jul 25, 18:50 UTCJul 25, 20:15 UTC1h 25m
2026-07-25 SKW3773 SEA → SMF Jul 25, 18:53 UTCJul 25, 20:14 UTC1h 21m
2026-07-25 SKW3696 BWI → BOS Jul 25, 13:55 UTCJul 25, 16:20 UTC2h 25m
2026-07-25 SKW3677 BOS → EWR Jul 25, 03:10 UTCJul 25, 03:45 UTC35m
2026-07-25 SKW127T MFR → SEA Jul 25, 00:35 UTCJul 25, 01:35 UTC1h 0m
2026-07-24 SKW3770 HPN → ATL Jul 24, 22:30 UTCJul 24, 23:45 UTC1h 15m
2026-07-24 SKW4070 MSP → MSN Jul 24, 19:30 UTCJul 24, 21:35 UTC2h 5m
2026-07-24 SKW4070 MSP → MSN Jul 24, 19:34 UTCJul 24, 21:31 UTC1h 57m
2026-07-24 SKW4070 MSP → MSN Jul 24, 16:15 UTCJul 24, 18:35 UTC2h 20m
2026-07-24 SKW4128 EUG → SEA Jul 24, 13:35 UTCJul 24, 14:20 UTC45m
2026-07-24 SKW3855 MSP → CID Jul 24, 06:50 UTCJul 24, 07:35 UTC45m
2026-07-24 SKW4100 MDW → DTW Jul 24, 04:15 UTCJul 24, 05:50 UTC1h 35m
2026-07-24 SKW4100 MDW → DTW Jul 24, 04:07 UTCJul 24, 05:36 UTC1h 29m
2026-07-24 SKW4100 MDW → DTW Jul 24, 01:15 UTCJul 24, 03:10 UTC1h 55m
2026-07-23 SKW3891 LAX → OAK Jul 23, 22:55 UTCJul 23, 23:35 UTC40m
2026-07-23 SKW3891 LAX → OAK Jul 23, 21:10 UTCJul 23, 21:40 UTC30m
2026-07-23 SKW3824 BMI → ATL Jul 23, 18:45 UTCJul 23, 19:30 UTC45m
2026-07-23 SKW3824 BMI → ATL Jul 23, 16:45 UTCJul 23, 17:30 UTC45m
2026-07-23 SKW3790 RIC → DTW Jul 23, 14:15 UTCJul 23, 15:00 UTC45m
2026-07-23 SKW3677 BOS → EWR Jul 23, 03:35 UTCJul 23, 04:15 UTC40m
2026-07-23 SKW3677 BOS → EWR Jul 23, 03:16 UTCJul 23, 04:13 UTC57m
2026-07-23 SKW4124 EUG → SEA Jul 23, 01:00 UTCJul 23, 01:45 UTC45m
2026-07-23 SKW4124 EUG → SEA Jul 23, 00:56 UTCJul 23, 01:40 UTC44m
2026-07-22 SKW181H ORD → BOS Jul 22, 23:10 UTCJul 23, 00:00 UTC50m
2026-07-22 SKW3754 GEG → SEA Jul 22, 20:30 UTCJul 22, 21:15 UTC45m
2026-07-22 SKW3754 SEA → GEG Jul 22, 19:00 UTCJul 22, 19:35 UTC35m
2026-07-22 SKW3953 JFK → ORD Jul 22, 17:15 UTCJul 22, 17:40 UTC25m
2026-07-22 SKW3953 JFK → ORD Jul 22, 14:55 UTCJul 22, 15:35 UTC40m
2026-07-22 SKW3972 - Jul 22, 13:05 UTCJul 22, 13:30 UTC25m
2026-07-22 SKW4043 HPN → ATL Jul 22, 03:00 UTCJul 22, 04:25 UTC1h 25m
2026-07-22 SKW4043 HPN → ATL Jul 22, 00:20 UTCJul 22, 01:55 UTC1h 35m
2026-07-21 SKW3958 SLC → PSC Jul 21, 21:40 UTCJul 21, 22:40 UTC1h 0m
2026-07-21 SKW3958 SLC → PSC Jul 21, 21:42 UTCJul 21, 22:39 UTC57m
2026-07-21 SKW3773 - Jul 21, 18:55 UTCJul 21, 20:25 UTC1h 30m
2026-07-21 SKW3700 EWR → MSP Jul 21, 16:35 UTCJul 21, 17:40 UTC1h 5m
2026-07-21 SKW3700 EWR → MSP Jul 21, 14:15 UTCJul 21, 15:20 UTC1h 5m
2026-07-21 SKW3759 JFK → BNA Jul 21, 04:05 UTCJul 21, 05:10 UTC1h 5m
2026-07-21 SKW3759 JFK → BNA Jul 21, 01:55 UTCJul 21, 03:00 UTC1h 5m
2026-07-20 SKW3822 MSP → GRB Jul 20, 23:30 UTCJul 21, 00:25 UTC54m
2026-07-20 SKW3822 MSP → GRB Jul 20, 21:45 UTCJul 20, 22:35 UTC50m
2026-07-20 SKW3951 PHX → LAX Jul 20, 19:56 UTCJul 20, 20:34 UTC38m
2026-07-20 SKW3951 - Jul 20, 19:40 UTCJul 20, 20:35 UTC55m
2026-07-20 SKW3951 - Jul 20, 17:35 UTCJul 20, 18:40 UTC1h 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 N312SY page for operator, model, and routing details .

Mode-S A34FE6 frequently asked

What is Mode-S code A34FE6?
A34FE6 is an ICAO 24-bit transponder address. Allocated to United States. Assigned to N312SY.
Where is Mode-S A34FE6 registered?
Mode-S code A34FE6 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 A34FE6 broadcasting right now?
No active broadcast right now. Last signal was Jul 26, 20:45 UTC.
Hex, octal, and decimal Mode-S codes: what's the difference?
The same 24-bit identifier expressed in different bases: hex A34FE6, octal 50647746, decimal 10,702,822.
What flights does A34FE6 operate?
Mode-S A34FE6 has broadcast 20 distinct callsigns, including SKW4121, SKW197F, SKW4026, SKW3989, SKW135K.