Apparatus

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sensors Mode-S transponder

A26801

ICAO 24-bit transponder address · allocated to United States

Currently assigned to N254SY · EMBRAER ERJ-170-200 (long wing) · operated by SKYWEST AIRLINES INC

Hex
A26801
Octal
50464001
Decimal
10,643,457
Country
US
Tail
N254SY
Type
E75L
Broadcasting now · callsign SKW4028 · 19,225 ft
Flights observed
704
Distinct callsigns
20
Country
US
Last broadcast
Jul 26, 20:55 UTC

Current position

A26801 is currently broadcasting. Map zoomed to live position.

Country allocation

The ICAO 24-bit address A26801 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
SKW3767 - 14 2026-06-22
SKW3876 - 11 2026-06-17
SKW3798 - 9 2026-06-26
SKW3669 - 9 2026-06-19
SKW3577 SkyWest Airlines 9 2026-06-22
SKW4177 SkyWest Airlines 8 2026-06-11
SKW4146 - 8 2026-06-21
SKW3908 - 8 2026-07-02
SKW3902 SkyWest Airlines 8 2026-07-26
SKW3802 - 8 2026-07-09
SKW3772 - 8 2026-06-21
SKW3650 SkyWest Airlines 8 2026-06-22
SKW4121 SkyWest Airlines 7 2026-06-11
SKW4101 SkyWest Airlines 7 2026-06-10
SKW4088 - 7 2026-06-14
SKW4063 SkyWest Airlines 7 2026-06-03
SKW4028 - 7 2026-06-18
SKW3966 SkyWest Airlines 7 2026-07-23
SKW3795 SkyWest Airlines 7 2026-05-16
SKW3765 - 7 2026-07-21

Recent flights last 50

DateFlightRouteTakeoffLandingDuration
2026-07-26 SKW3902 DTW → ALB Jul 26, 20:05 UTCJul 26, 20:55 UTC50m
2026-07-26 SKW3716 ATL → AGS Jul 26, 18:20 UTCJul 26, 18:45 UTC25m
2026-07-26 SKW3716 ATL → AGS Jul 26, 16:20 UTCJul 26, 16:50 UTC30m
2026-07-26 SKW3502 YUL → DTW Jul 26, 13:25 UTCJul 26, 14:35 UTC1h 10m
2026-07-26 SKW3846 LAX → TUS Jul 26, 02:55 UTCJul 26, 04:05 UTC1h 10m
2026-07-26 SKW3902 DTW → ALB Jul 26, 00:00 UTCJul 26, 01:05 UTC1h 5m
2026-07-25 SKW3902 DTW → ALB Jul 25, 20:05 UTCJul 25, 21:00 UTC55m
2026-07-25 SKW4106 RNO → LAX Jul 25, 14:35 UTCJul 25, 15:45 UTC1h 10m
2026-07-25 SKW3929 SJC → SLC Jul 25, 06:30 UTCJul 25, 07:25 UTC55m
2026-07-25 SKW3712 LAX → SMF Jul 25, 03:45 UTCJul 25, 04:50 UTC1h 5m
2026-07-24 SKW3712 LAX → SMF Jul 24, 23:50 UTCJul 25, 00:50 UTC1h 0m
2026-07-24 SKW3744 LAX → OAK Jul 24, 20:00 UTCJul 24, 21:05 UTC1h 5m
2026-07-24 SKW3680 IAD → MSP Jul 24, 16:10 UTCJul 24, 19:00 UTC2h 50m
2026-07-24 SKW4036 HPN → ATL Jul 24, 13:25 UTCJul 24, 14:10 UTC45m
2026-07-24 SKW4047 HPN → DTW Jul 24, 05:35 UTCJul 24, 06:15 UTC40m
2026-07-24 SKW4047 HPN → DTW Jul 24, 05:40 UTCJul 24, 06:11 UTC31m
2026-07-24 SKW4031 LAX → ABQ Jul 24, 04:30 UTCJul 24, 04:35 UTC5m
2026-07-24 SKW4031 LAX → ABQ Jul 24, 02:20 UTCJul 24, 04:35 UTC2h 15m
2026-07-24 SKW4031 LAX → ABQ Jul 24, 02:14 UTCJul 24, 04:14 UTC2h 0m
2026-07-23 SKW4031 LAX → ABQ Jul 23, 23:15 UTCJul 24, 01:30 UTC2h 15m
2026-07-23 SKW3966 AUS → CVG Jul 23, 19:30 UTCJul 23, 21:50 UTC2h 20m
2026-07-23 SKW3966 AUS → CVG Jul 23, 16:05 UTCJul 23, 18:30 UTC2h 25m
2026-07-23 SKW3991 ATL → HPN Jul 23, 06:15 UTCJul 23, 07:50 UTC1h 35m
2026-07-23 SKW3991 ATL → HPN Jul 23, 03:20 UTCJul 23, 05:15 UTC1h 55m
2026-07-22 SKW4174 RST → MSP Jul 22, 20:15 UTCJul 22, 23:40 UTC3h 25m
2026-07-22 SKW4444 GEG → SLC Jul 22, 17:00 UTCJul 22, 18:20 UTC1h 20m
2026-07-22 SKW4444 SLC → GEG Jul 22, 14:45 UTCJul 22, 16:05 UTC1h 20m
2026-07-22 SKW4444 SLC → GEG Jul 22, 14:30 UTCJul 22, 15:56 UTC1h 26m
2026-07-22 SKW3937 SEA → MFR Jul 22, 02:20 UTCJul 22, 03:55 UTC1h 35m
2026-07-22 SKW3937 SEA → MFR Jul 22, 00:00 UTCJul 22, 01:25 UTC1h 25m
2026-07-21 SKW3765 - Jul 21, 22:10 UTCJul 21, 22:50 UTC40m
2026-07-21 SKW3765 - Jul 21, 19:55 UTCJul 21, 20:20 UTC25m
2026-07-21 SKW4026 MSP → ATW Jul 21, 17:00 UTCJul 21, 18:30 UTC1h 30m
2026-07-21 SKW4451 - Jul 21, 15:05 UTCJul 21, 15:55 UTC50m
2026-07-21 SKW4115 ABQ → LAX Jul 21, 12:05 UTCJul 21, 13:40 UTC1h 35m
2026-07-21 SKW4098 MDW → MSP Jul 21, 03:55 UTCJul 21, 05:35 UTC1h 40m
2026-07-20 SKW3799 MDW → MSP Jul 20, 23:45 UTCJul 21, 02:10 UTC2h 25m
2026-07-20 SKW3794 SJC → SEA Jul 20, 20:45 UTCJul 20, 22:45 UTC2h 0m
2026-07-20 SKW3755 LAX → SMF Jul 20, 18:30 UTCJul 20, 19:40 UTC1h 10m
2026-07-20 SKW3755 LAX → SMF Jul 20, 16:10 UTCJul 20, 17:10 UTC1h 0m
2026-07-20 SKW3725 SBN → ATL Jul 20, 13:10 UTCJul 20, 14:55 UTC1h 45m
2026-07-20 SKW3692 SLC → OAK Jul 20, 02:55 UTCJul 20, 04:00 UTC1h 5m
2026-07-20 SKW4124 EUG → SEA Jul 20, 00:55 UTCJul 20, 01:35 UTC40m
2026-07-19 SKW181H ORD → BOS Jul 19, 23:00 UTCJul 19, 23:50 UTC50m
2026-07-19 SKW3966 AUS → CVG Jul 19, 19:00 UTCJul 19, 21:10 UTC2h 10m
2026-07-19 SKW3966 AUS → CVG Jul 19, 18:44 UTCJul 19, 21:05 UTC2h 21m
2026-07-19 SKW3966 AUS → CVG Jul 19, 15:05 UTCJul 19, 17:30 UTC2h 25m
2026-07-19 SKW4100 SJC → SEA Jul 19, 03:55 UTCJul 19, 05:25 UTC1h 30m
2026-07-19 SKW4100 SJC → SEA Jul 19, 03:56 UTCJul 19, 05:24 UTC1h 28m
2026-07-19 SKW4100 SEA → SJC Jul 19, 01:00 UTCJul 19, 03:00 UTC2h 0m

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 N254SY page for operator, model, and routing details .

Mode-S A26801 frequently asked

What is Mode-S code A26801?
A26801 is an ICAO 24-bit transponder address. Allocated to United States. Assigned to N254SY.
Where is Mode-S A26801 registered?
Mode-S code A26801 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 A26801 broadcasting right now?
Yes. Mode-S A26801 is currently airborne.
Hex, octal, and decimal Mode-S codes: what's the difference?
The same 24-bit identifier expressed in different bases: hex A26801, octal 50464001, decimal 10,643,457.
What flights does A26801 operate?
Mode-S A26801 has broadcast 20 distinct callsigns, including SKW3767, SKW3876, SKW3798, SKW3669, SKW3577.