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sensors Mode-S transponder

A1801C

ICAO 24-bit transponder address · allocated to United States

Currently assigned to N196SY · EMBRAER ERJ-170-200 (long wing) · operated by SKYWEST AIRLINES INC

Hex
A1801C
Octal
50300034
Decimal
10,584,092
Country
US
Tail
N196SY
Type
E75L
No current signal · last broadcast Jul 26, 22:20 UTC
Flights observed
699
Distinct callsigns
20
Country
US
Last broadcast
Jul 26, 22:20 UTC

Last known position

Most recent position reported by Mode-S A1801C.

Country allocation

The ICAO 24-bit address A1801C 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
SKW3450 - 9 2026-07-10
SKW3495 - 8 2026-07-01
SKW3483 - 7 2026-07-14
SKW3320 - 7 2026-07-22
SKW3066 - 7 2026-06-29
SKW3497 - 6 2026-07-10
SKW3492 - 6 2026-07-01
SKW3489 - 6 2026-07-17
SKW3403 SkyWest Airlines 6 2026-05-08
SKW3372 SkyWest Airlines 6 2026-06-24
SKW3289 - 6 2026-07-02
SKW3260 - 6 2026-07-19
SKW3251 - 6 2026-07-09
SKW847E - 5 2026-07-03
SKW3433 SkyWest Airlines 5 2026-06-02
SKW3413 SkyWest Airlines 5 2026-07-23
SKW3410 - 5 2026-07-07
SKW3404 SkyWest Airlines 5 2026-06-03
SKW3401 SkyWest Airlines 5 2026-05-13
SKW3384 - 5 2026-07-22

Recent flights last 50

DateFlightRouteTakeoffLandingDuration
2026-07-26 SKW3369 PSP → SFO Jul 26, 17:40 UTCJul 26, 22:20 UTC4h 40m
2026-07-26 SKW3480 BZN → SAN Jul 26, 14:15 UTCJul 26, 16:10 UTC1h 55m
2026-07-26 SKW3215 SJD → LAS Jul 26, 02:30 UTCJul 26, 03:20 UTC50m
2026-07-26 SKW3052 SFO → LAX Jul 26, 01:10 UTCJul 26, 01:50 UTC40m
2026-07-25 SKW3421 SFO → LAX Jul 25, 23:06 UTCJul 26, 00:14 UTC1h 8m
2026-07-25 SKW3490 STS → SNA Jul 25, 20:40 UTCJul 25, 21:35 UTC55m
2026-07-25 SKW3100 SBA → PHX Jul 25, 17:50 UTCJul 25, 18:50 UTC1h 0m
2026-07-25 SKW3100 SBA → PHX Jul 25, 17:41 UTCJul 25, 18:49 UTC1h 8m
2026-07-25 SKW3101 FWA → DFW Jul 25, 15:15 UTCJul 25, 16:00 UTC45m
2026-07-25 SKW3026 SEA → IDA Jul 25, 13:20 UTCJul 25, 14:05 UTC45m
2026-07-25 SKW3027 SEA → FAT Jul 25, 03:55 UTCJul 25, 04:35 UTC40m
2026-07-25 SKW3082 ACT → DFW Jul 25, 00:15 UTCJul 25, 01:45 UTC1h 30m
2026-07-24 SKW3083 PDX → STS Jul 24, 21:45 UTCJul 24, 23:05 UTC1h 20m
2026-07-24 SKW3363 SFO → LAX Jul 24, 18:55 UTCJul 24, 20:25 UTC1h 30m
2026-07-24 SKW3362 SEA → SFO Jul 24, 16:20 UTCJul 24, 17:10 UTC50m
2026-07-24 SKW3448 - Jul 24, 13:15 UTCJul 24, 13:35 UTC20m
2026-07-24 SKW3106 SAN → SJC Jul 24, 06:30 UTCJul 24, 07:10 UTC40m
2026-07-24 SKW3280 PSP → SFO Jul 24, 04:15 UTCJul 24, 05:50 UTC1h 35m
2026-07-24 SKW3488 SJC → PDX Jul 24, 01:40 UTCJul 24, 03:10 UTC1h 30m
2026-07-23 SKW3221 EUG → LAX Jul 23, 23:45 UTCJul 24, 00:50 UTC1h 5m
2026-07-23 SKW3346 LAX → SFO Jul 23, 20:40 UTCJul 23, 21:30 UTC50m
2026-07-23 SKW3499 SJC → SAN Jul 23, 16:30 UTCJul 23, 17:40 UTC1h 10m
2026-07-23 SKW3131 - Jul 23, 14:35 UTCJul 23, 15:30 UTC55m
2026-07-23 SKW3131 - Jul 23, 13:50 UTCJul 23, 14:05 UTC15m
2026-07-23 SKW3413 SJC → BOI Jul 23, 03:30 UTCJul 23, 04:45 UTC1h 15m
2026-07-23 SKW3068 SAN → PHX Jul 23, 01:35 UTCJul 23, 02:35 UTC1h 0m
2026-07-22 SKW3221 EUG → LAX Jul 22, 23:25 UTCJul 23, 00:30 UTC1h 5m
2026-07-22 SKW3346 LAX → SFO Jul 22, 20:25 UTCJul 22, 21:15 UTC50m
2026-07-22 SKW3313 OAK → SAN Jul 22, 18:10 UTCJul 22, 19:20 UTC1h 10m
2026-07-22 SKW3320 - Jul 22, 15:25 UTCJul 22, 16:30 UTC1h 5m
2026-07-22 SKW3384 - Jul 22, 13:20 UTCJul 22, 14:25 UTC1h 5m
2026-07-22 SKW3020 SNA → SFO Jul 22, 03:20 UTCJul 22, 05:20 UTC2h 0m
2026-07-22 SKW3020 SNA → SFO Jul 22, 02:53 UTCJul 22, 05:14 UTC2h 21m
2026-07-21 SKW3012 STS → SAN Jul 21, 23:05 UTCJul 22, 01:10 UTC2h 5m
2026-07-21 SKW3439 STS → SAN Jul 21, 20:55 UTCJul 21, 22:10 UTC1h 15m
2026-07-21 SKW833K - Jul 21, 18:50 UTCJul 21, 20:00 UTC1h 10m
2026-07-21 SKW3015 SMF → SAN Jul 21, 16:05 UTCJul 21, 17:15 UTC1h 10m
2026-07-21 SKW3006 SEA → SFO Jul 21, 04:24 UTCJul 21, 05:15 UTC51m
2026-07-21 SKW3006 SEA → SFO Jul 21, 04:10 UTCJul 21, 05:25 UTC1h 15m
2026-07-21 SKW3060 PHX → SAN Jul 21, 02:15 UTCJul 21, 03:05 UTC50m
2026-07-21 SKW3061 LAX → SJC Jul 21, 00:00 UTCJul 21, 01:00 UTC1h 0m
2026-07-20 SKW3084 SBN → DFW Jul 20, 20:10 UTCJul 20, 23:00 UTC2h 50m
2026-07-20 SKW3085 - Jul 20, 16:30 UTCJul 20, 19:00 UTC2h 30m
2026-07-20 SKW3207 MFR → SAN Jul 20, 13:25 UTCJul 20, 15:10 UTC1h 45m
2026-07-20 SKW3321 BOI → SEA Jul 20, 03:05 UTCJul 20, 04:35 UTC1h 30m
2026-07-20 SKW3466 - Jul 20, 00:45 UTCJul 20, 01:55 UTC1h 10m
2026-07-19 SKW3093 - Jul 19, 22:25 UTCJul 19, 23:35 UTC1h 10m
2026-07-19 SKW3223 - Jul 19, 18:35 UTCJul 19, 20:30 UTC1h 55m
2026-07-19 SKW3224 BUR → RDM Jul 19, 15:45 UTCJul 19, 17:30 UTC1h 45m
2026-07-19 SKW3260 EUG → BUR Jul 19, 02:35 UTCJul 19, 04:25 UTC1h 50m

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 N196SY page for operator, model, and routing details .

Mode-S A1801C frequently asked

What is Mode-S code A1801C?
A1801C is an ICAO 24-bit transponder address. Allocated to United States. Assigned to N196SY.
Where is Mode-S A1801C registered?
Mode-S code A1801C 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 A1801C broadcasting right now?
No active broadcast right now. Last signal was Jul 26, 22:20 UTC.
Hex, octal, and decimal Mode-S codes: what's the difference?
The same 24-bit identifier expressed in different bases: hex A1801C, octal 50300034, decimal 10,584,092.
What flights does A1801C operate?
Mode-S A1801C has broadcast 20 distinct callsigns, including SKW3450, SKW3495, SKW3483, SKW3320, SKW3066.