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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
Broadcasting now · callsign SKW3231 · 8,575 ft
Flights observed
620
Distinct callsigns
20
Country
US
Last broadcast
9m ago

Current position

A1801C is currently broadcasting. Map zoomed to live position.

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
SKW3066 - 7 2026-06-29
SKW3497 - 6 2026-07-10
SKW3492 - 6 2026-07-01
SKW3403 SkyWest Airlines 6 2026-05-08
SKW3372 SkyWest Airlines 6 2026-06-24
SKW3320 SkyWest Airlines 6 2026-07-12
SKW3289 - 6 2026-07-02
SKW3251 - 6 2026-07-09
SKW847E - 5 2026-07-03
SKW3433 SkyWest Airlines 5 2026-06-02
SKW3410 - 5 2026-07-07
SKW3404 SkyWest Airlines 5 2026-06-03
SKW3401 SkyWest Airlines 5 2026-05-13
SKW3360 SkyWest Airlines 5 2026-06-18
SKW3262 SkyWest Airlines 5 2026-05-12
SKW3260 - 5 2026-06-18
SKW3250 - 5 2026-07-11

Recent flights last 50

DateFlightRouteTakeoffLandingDuration
2026-07-15 SKW3231 - Jul 15, 00:05 UTCJul 15, 01:00 UTC55m
2026-07-14 SKW3483 - Jul 14, 21:45 UTCJul 14, 23:10 UTC1h 24m
2026-07-14 SKW3121 - Jul 14, 19:25 UTCJul 14, 20:25 UTC1h 0m
2026-07-14 SKW3110 - Jul 14, 16:55 UTCJul 14, 17:55 UTC1h 0m
2026-07-14 SKW3018 SLC → SAN Jul 14, 14:00 UTCJul 14, 15:30 UTC1h 30m
2026-07-14 SKW3291 - Jul 14, 01:00 UTCJul 14, 02:50 UTC1h 50m
2026-07-14 SKW3291 PDX → SLC Jul 14, 00:57 UTCJul 14, 02:30 UTC1h 33m
2026-07-13 SKW3202 GEG → PDX Jul 13, 23:05 UTCJul 13, 23:55 UTC50m
2026-07-13 SKW3202 GEG → PDX Jul 13, 23:10 UTCJul 13, 23:53 UTC43m
2026-07-13 SKW3075 SFO → GEG Jul 13, 20:35 UTCJul 13, 22:05 UTC1h 30m
2026-07-13 SKW3205 - Jul 13, 18:20 UTCJul 13, 19:25 UTC1h 5m
2026-07-13 SKW3235 - Jul 13, 14:40 UTCJul 13, 16:45 UTC2h 5m
2026-07-13 SKW3413 - Jul 13, 02:55 UTCJul 13, 04:05 UTC1h 10m
2026-07-13 SKW3068 - Jul 13, 01:15 UTCJul 13, 02:15 UTC1h 0m
2026-07-12 SKW3311 OAK → SAN Jul 12, 22:10 UTCJul 12, 23:30 UTC1h 20m
2026-07-12 SKW3218 - Jul 12, 20:05 UTCJul 12, 21:05 UTC1h 0m
2026-07-12 SKW3313 OAK → SAN Jul 12, 17:45 UTCJul 12, 19:05 UTC1h 20m
2026-07-12 SKW3320 SJC → PDX Jul 12, 15:30 UTCJul 12, 16:35 UTC1h 5m
2026-07-12 SKW3320 SJC → PDX Jul 12, 15:39 UTCJul 12, 16:30 UTC51m
2026-07-12 SKW3384 SJC → PDX Jul 12, 13:15 UTCJul 12, 14:20 UTC1h 5m
2026-07-12 SKW3384 SJC → PDX Jul 12, 13:18 UTCJul 12, 14:20 UTC1h 2m
2026-07-12 SKW9790 - Jul 12, 01:15 UTCJul 12, 04:15 UTC3h 0m
2026-07-11 SKW3250 SAN → AUS Jul 11, 21:25 UTCJul 12, 00:01 UTC2h 35m
2026-07-11 SKW3111 - Jul 11, 19:00 UTCJul 11, 20:20 UTC1h 20m
2026-07-11 SKW3079 - Jul 11, 16:35 UTCJul 11, 17:45 UTC1h 10m
2026-07-11 SKW3385 - Jul 11, 13:45 UTCJul 11, 14:10 UTC25m
2026-07-11 SKW3102 - Jul 11, 04:45 UTCJul 11, 05:01 UTC15m
2026-07-11 SKW3102 SEA → YYJ Jul 11, 04:53 UTCJul 11, 05:07 UTC14m
2026-07-11 SKW3048 - Jul 11, 03:01 UTCJul 11, 03:40 UTC40m
2026-07-11 SKW3048 EUG → SEA Jul 11, 02:59 UTCJul 11, 03:36 UTC37m
2026-07-11 SKW3107 BUR → EUG Jul 11, 00:25 UTCJul 11, 02:05 UTC1h 40m
2026-07-10 SKW3092 SAN → SJC Jul 10, 22:15 UTCJul 10, 23:15 UTC1h 0m
2026-07-10 SKW3467 - Jul 10, 19:55 UTCJul 10, 21:10 UTC1h 15m
2026-07-10 SKW3450 - Jul 10, 17:45 UTCJul 10, 18:55 UTC1h 10m
2026-07-10 SKW3450 SFO → SNA Jul 10, 17:52 UTCJul 10, 18:45 UTC53m
2026-07-10 SKW3497 - Jul 10, 15:25 UTCJul 10, 16:50 UTC1h 25m
2026-07-10 SKW3497 PSP → SFO Jul 10, 14:52 UTCJul 10, 16:45 UTC1h 53m
2026-07-10 SKW3356 - Jul 10, 03:35 UTCJul 10, 04:35 UTC1h 0m
2026-07-10 SKW3248 SJC → SEA Jul 10, 01:20 UTCJul 10, 02:25 UTC1h 5m
2026-07-09 SKW3494 SNA → SFO Jul 9, 23:20 UTCJul 10, 00:25 UTC1h 5m
2026-07-09 SKW3208 - Jul 9, 19:50 UTCJul 9, 21:45 UTC1h 55m
2026-07-09 SKW3468 - Jul 9, 16:50 UTCJul 9, 18:10 UTC1h 20m
2026-07-09 SKW3251 - Jul 9, 14:20 UTCJul 9, 15:25 UTC1h 5m
2026-07-09 SKW3464 - Jul 9, 02:25 UTCJul 9, 03:35 UTC1h 10m
2026-07-09 SKW3269 SMF → LAX Jul 9, 00:00 UTCJul 9, 01:05 UTC1h 5m
2026-07-08 SKW3269 SMF → LAX Jul 8, 23:46 UTCJul 9, 01:05 UTC1h 19m
2026-07-08 SKW3237 - Jul 8, 21:40 UTCJul 8, 22:45 UTC1h 5m
2026-07-08 SKW3237 SFO → SNA Jul 8, 21:46 UTCJul 8, 22:45 UTC59m
2026-07-08 SKW3347 SAN → SFO Jul 8, 19:15 UTCJul 8, 20:25 UTC1h 10m
2026-07-08 SKW3347 SAN → SFO Jul 8, 19:18 UTCJul 8, 20:20 UTC1h 2m

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?
Yes. Mode-S A1801C is currently airborne.
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, SKW3066, SKW3497.