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sensors Mode-S transponder

A34878

ICAO 24-bit transponder address · allocated to United States

Currently assigned to N310SY · operated by SKYWEST AIRLINES INC

Hex
A34878
Octal
50644170
Decimal
10,700,920
Country
US
Tail
N310SY
Type
E75L
Broadcasting now · callsign SKW138Y · 31,450 ft
Flights observed
653
Distinct callsigns
20
Country
US
Last broadcast
1h ago

Current position

A34878 is currently broadcasting. Map zoomed to live position.

Country allocation

The ICAO 24-bit address A34878 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
SKW3999 - 14 2026-06-22
SKW3951 - 11 2026-07-09
SKW3759 - 11 2026-07-10
SKW3841 - 10 2026-07-12
SKW3822 - 10 2026-07-09
SKW3929 - 9 2026-07-14
SKW3818 SkyWest Airlines 9 2026-06-22
SKW4099 - 8 2026-06-18
SKW4087 - 8 2026-07-03
SKW3902 - 8 2026-06-17
SKW3828 - 8 2026-07-13
SKW3754 - 8 2026-06-25
SKW3750 - 8 2026-07-02
SKW3712 - 8 2026-07-14
SKW4106 - 7 2026-07-14
SKW4043 - 7 2026-07-11
SKW3802 - 7 2026-06-19
SKW3755 SkyWest Airlines 7 2026-05-26
SKW4112 SkyWest Airlines 6 2026-06-05
SKW4077 - 6 2026-06-18

Recent flights last 50

DateFlightRouteTakeoffLandingDuration
2026-07-14 SKW4106 - Jul 14, 14:40 UTCJul 14, 15:50 UTC1h 10m
2026-07-14 SKW3929 - Jul 14, 05:15 UTCJul 14, 06:05 UTC50m
2026-07-14 SKW3712 SMF → LAX Jul 14, 02:14 UTCJul 14, 03:18 UTC1h 4m
2026-07-14 SKW3712 SMF → LAX Jul 14, 02:20 UTCJul 14, 03:35 UTC1h 15m
2026-07-13 SKW3712 - Jul 13, 23:45 UTCJul 14, 00:40 UTC55m
2026-07-13 SKW3812 SMF → LAX Jul 13, 21:30 UTCJul 13, 22:40 UTC1h 10m
2026-07-13 SKW3812 SMF → LAX Jul 13, 21:24 UTCJul 13, 22:32 UTC1h 8m
2026-07-13 SKW134F - Jul 13, 19:15 UTCJul 13, 20:15 UTC1h 0m
2026-07-13 SKW4451 - Jul 13, 17:10 UTCJul 13, 18:00 UTC50m
2026-07-13 SKW4451 SJC → LAX Jul 13, 17:10 UTCJul 13, 17:59 UTC49m
2026-07-13 SKW4026 SLC → SJC Jul 13, 14:05 UTCJul 13, 15:40 UTC1h 35m
2026-07-13 SKW3828 - Jul 13, 01:01 UTCJul 13, 02:10 UTC1h 10m
2026-07-12 SKW3828 - Jul 12, 23:10 UTCJul 12, 23:35 UTC25m
2026-07-12 SKW3841 SBA → SLC Jul 12, 19:53 UTCJul 12, 21:20 UTC1h 27m
2026-07-12 SKW3841 SBA → SLC Jul 12, 19:50 UTCJul 12, 21:25 UTC1h 35m
2026-07-12 SKW3841 SLC → SBA Jul 12, 17:15 UTCJul 12, 18:55 UTC1h 40m
2026-07-12 SKW4029 - Jul 12, 13:35 UTCJul 12, 15:50 UTC2h 15m
2026-07-12 SKW3703 SLC → OKC Jul 12, 01:55 UTCJul 12, 03:55 UTC2h 0m
2026-07-11 SKW3916 - Jul 11, 23:40 UTCJul 12, 00:15 UTC35m
2026-07-11 SKW4104 - Jul 11, 19:30 UTCJul 11, 20:20 UTC50m
2026-07-11 SKW3953 PDX → SEA Jul 11, 17:00 UTCJul 11, 17:35 UTC35m
2026-07-11 SKW3953 SEA → PDX Jul 11, 14:45 UTCJul 11, 15:20 UTC35m
2026-07-11 SKW3972 - Jul 11, 12:45 UTCJul 11, 13:20 UTC35m
2026-07-11 SKW4017 - Jul 11, 06:05 UTCJul 11, 06:40 UTC35m
2026-07-11 SKW4043 SMF → SEA Jul 11, 03:01 UTCJul 11, 04:20 UTC1h 20m
2026-07-11 SKW4043 SEA → SMF Jul 11, 00:15 UTCJul 11, 01:50 UTC1h 35m
2026-07-10 SKW3958 - Jul 10, 21:45 UTCJul 10, 22:50 UTC1h 5m
2026-07-10 SKW3773 - Jul 10, 18:55 UTCJul 10, 20:35 UTC1h 40m
2026-07-10 SKW3773 LAX → BOI Jul 10, 18:53 UTCJul 10, 20:33 UTC1h 40m
2026-07-10 SKW3700 - Jul 10, 16:35 UTCJul 10, 17:40 UTC1h 5m
2026-07-10 SKW3700 - Jul 10, 14:15 UTCJul 10, 15:20 UTC1h 5m
2026-07-10 SKW3759 SMF → LAX Jul 10, 04:15 UTCJul 10, 05:50 UTC1h 35m
2026-07-10 SKW3759 SMF → LAX Jul 10, 03:59 UTCJul 10, 05:22 UTC1h 23m
2026-07-10 SKW3759 - Jul 10, 01:55 UTCJul 10, 03:00 UTC1h 5m
2026-07-09 SKW3822 - Jul 9, 23:45 UTCJul 10, 00:40 UTC55m
2026-07-09 SKW3822 - Jul 9, 21:50 UTCJul 9, 22:45 UTC55m
2026-07-09 SKW3951 - Jul 9, 19:35 UTCJul 9, 20:30 UTC55m
2026-07-09 SKW3951 - Jul 9, 17:30 UTCJul 9, 18:35 UTC1h 5m
2026-07-09 SKW3696 GEG → LAX Jul 9, 13:35 UTCJul 9, 15:45 UTC2h 10m
2026-07-09 SKW3576 - Jul 9, 04:40 UTCJul 9, 06:55 UTC2h 15m
2026-07-09 SKW3712 - Jul 9, 02:10 UTCJul 9, 03:10 UTC1h 0m
2026-07-09 SKW3712 SMF → LAX Jul 9, 02:08 UTCJul 9, 03:10 UTC1h 2m
2026-07-08 SKW3712 - Jul 8, 23:55 UTCJul 9, 01:00 UTC1h 5m
2026-07-08 SKW3812 - Jul 8, 21:30 UTCJul 8, 22:35 UTC1h 5m
2026-07-08 SKW134F - Jul 8, 19:10 UTCJul 8, 20:15 UTC1h 5m
2026-07-08 SKW4451 SJC → LAX Jul 8, 17:10 UTCJul 8, 18:05 UTC55m
2026-07-08 SKW4451 SJC → LAX Jul 8, 17:01 UTCJul 8, 18:00 UTC59m
2026-07-08 SKW4026 SLC → SJC Jul 8, 14:05 UTCJul 8, 15:40 UTC1h 35m
2026-07-08 SKW3828 - Jul 8, 00:50 UTCJul 8, 02:20 UTC1h 30m
2026-07-07 SKW3828 - Jul 7, 22:35 UTCJul 7, 23:30 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 N310SY page for operator, model, and routing details .

Mode-S A34878 frequently asked

What is Mode-S code A34878?
A34878 is an ICAO 24-bit transponder address. Allocated to United States. Assigned to N310SY.
Where is Mode-S A34878 registered?
Mode-S code A34878 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 A34878 broadcasting right now?
Yes. Mode-S A34878 is currently airborne.
Hex, octal, and decimal Mode-S codes: what's the difference?
The same 24-bit identifier expressed in different bases: hex A34878, octal 50644170, decimal 10,700,920.
What flights does A34878 operate?
Mode-S A34878 has broadcast 20 distinct callsigns, including SKW3999, SKW3951, SKW3759, SKW3841, SKW3822.