Apparatus

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sensors Mode-S transponder

A1311E

ICAO 24-bit transponder address · allocated to United States

Currently assigned to N176SY · EMBRAER ERJ-170-200 (long wing) · operated by SKYWEST AIRLINES INC

Hex
A1311E
Octal
50230436
Decimal
10,563,870
Country
US
Tail
N176SY
Type
E75L
No current signal · last broadcast Jul 26, 16:30 UTC
Flights observed
657
Distinct callsigns
20
Country
US
Last broadcast
Jul 26, 16:30 UTC

Last known position

Most recent position reported by Mode-S A1311E.

Country allocation

The ICAO 24-bit address A1311E 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
SKW3304 SkyWest Airlines 14 2026-07-26
SKW3303 SkyWest Airlines 11 2026-07-26
SKW3294 SkyWest Airlines 9 2026-06-27
SKW3324 SkyWest Airlines 8 2026-07-24
SKW3259 SkyWest Airlines 7 2026-05-22
SKW3106 SkyWest Airlines 7 2026-07-19
SKW3074 - 7 2026-06-23
SKW3066 - 7 2026-07-13
SKW3438 SkyWest Airlines 6 2026-07-24
SKW3404 SkyWest Airlines 6 2026-07-25
SKW3360 - 6 2026-07-16
SKW3343 - 6 2026-07-11
SKW3299 - 6 2026-06-19
SKW3285 SkyWest Airlines 6 2026-07-19
SKW3224 - 6 2026-06-25
SKW3067 - 6 2026-07-15
SKW3030 - 6 2026-07-18
SKW3023 SkyWest Airlines 6 2026-04-29
SKW3018 - 6 2026-07-12
SKW3017 - 6 2026-07-16

Recent flights last 50

DateFlightRouteTakeoffLandingDuration
2026-07-26 SKW3304 SEA → SFO Jul 26, 14:15 UTCJul 26, 16:30 UTC2h 15m
2026-07-26 SKW3303 AUS → LAX Jul 26, 02:50 UTCJul 26, 04:30 UTC1h 40m
2026-07-25 SKW3404 SNA → SFO Jul 25, 17:50 UTCJul 26, 00:50 UTC7h 0m
2026-07-25 SKW3304 SEA → SFO Jul 25, 14:15 UTCJul 25, 16:25 UTC2h 10m
2026-07-25 SKW3303 AUS → LAX Jul 25, 03:00 UTCJul 25, 04:50 UTC1h 50m
2026-07-24 SKW3438 SJC → PDX Jul 24, 18:45 UTCJul 25, 00:00 UTC5h 15m
2026-07-24 SKW3324 SNA → SFO Jul 24, 15:30 UTCJul 24, 17:30 UTC2h 0m
2026-07-24 SKW3323 LAX → PDX Jul 24, 02:30 UTCJul 24, 04:05 UTC1h 35m
2026-07-23 SKW3399 SEA → SFO Jul 23, 23:35 UTCJul 24, 01:00 UTC1h 25m
2026-07-23 SKW3398 PDX → SBP Jul 23, 18:45 UTCJul 23, 20:15 UTC1h 30m
2026-07-23 SKW3398 PDX → SBP Jul 23, 18:54 UTCJul 23, 21:09 UTC2h 15m
2026-07-23 SKW3324 SNA → SFO Jul 23, 15:35 UTCJul 23, 17:18 UTC1h 43m
2026-07-23 SKW3324 SNA → SFO Jul 23, 15:25 UTCJul 23, 17:20 UTC1h 55m
2026-07-23 SKW3323 LAX → PDX Jul 23, 01:35 UTCJul 23, 03:20 UTC1h 45m
2026-07-22 SKW3398 PDX → SBP Jul 22, 18:25 UTCJul 23, 00:15 UTC5h 50m
2026-07-22 SKW3480 BZN → SAN Jul 22, 14:15 UTCJul 22, 16:10 UTC1h 55m
2026-07-22 SKW3480 BZN → SAN Jul 22, 14:23 UTCJul 22, 16:05 UTC1h 42m
2026-07-22 SKW3096 EUG → SEA Jul 22, 00:20 UTCJul 22, 02:20 UTC2h 0m
2026-07-21 SKW3095 ACT → DFW Jul 21, 21:05 UTCJul 21, 22:55 UTC1h 50m
2026-07-21 SKW3209 FAT → SEA Jul 21, 18:10 UTCJul 21, 19:40 UTC1h 30m
2026-07-21 SKW3209 FAT → SEA Jul 21, 18:22 UTCJul 21, 19:39 UTC1h 17m
2026-07-21 SKW3116 SLC → SAN Jul 21, 15:15 UTCJul 21, 17:00 UTC1h 45m
2026-07-21 SKW3215 SJD → LAS Jul 21, 02:30 UTCJul 21, 03:15 UTC45m
2026-07-21 SKW3052 SFO → LAX Jul 21, 01:05 UTCJul 21, 01:50 UTC45m
2026-07-21 SKW3052 SFO → LAX Jul 21, 01:13 UTCJul 21, 01:46 UTC33m
2026-07-20 SKW3421 SFO → LAX Jul 20, 23:15 UTCJul 21, 00:10 UTC54m
2026-07-20 SKW3490 STS → SNA Jul 20, 20:10 UTCJul 20, 21:10 UTC1h 0m
2026-07-20 SKW3490 STS → SNA Jul 20, 20:09 UTCJul 20, 21:25 UTC1h 16m
2026-07-20 SKW3100 - Jul 20, 17:40 UTCJul 20, 18:45 UTC1h 5m
2026-07-20 SKW3101 FWA → DFW Jul 20, 15:25 UTCJul 20, 16:10 UTC45m
2026-07-20 SKW3026 - Jul 20, 13:15 UTCJul 20, 13:55 UTC40m
2026-07-20 SKW3027 SEA → FAT Jul 20, 02:55 UTCJul 20, 03:45 UTC50m
2026-07-19 SKW3345 - Jul 19, 22:15 UTCJul 19, 23:05 UTC50m
2026-07-19 SKW3345 ACV → SEA Jul 19, 22:19 UTCJul 19, 23:05 UTC46m
2026-07-19 SKW3220 LAX → EUG Jul 19, 19:50 UTCJul 19, 21:00 UTC1h 10m
2026-07-19 SKW3431 SJC → PSP Jul 19, 17:45 UTCJul 19, 18:10 UTC25m
2026-07-19 SKW3105 LAX → SFO Jul 19, 15:45 UTCJul 19, 16:30 UTC45m
2026-07-19 SKW3106 SAN → SJC Jul 19, 05:15 UTCJul 19, 05:50 UTC35m
2026-07-19 SKW3106 SAN → SJC Jul 19, 05:16 UTCJul 19, 05:50 UTC34m
2026-07-19 SKW3285 LAX → SEA Jul 19, 01:05 UTCJul 19, 02:25 UTC1h 20m
2026-07-18 SKW3285 LAX → SEA Jul 18, 22:25 UTCJul 18, 23:50 UTC1h 25m
2026-07-18 SKW9793 RNO → SEA Jul 18, 19:35 UTCJul 18, 20:40 UTC1h 5m
2026-07-18 SKW9793 RNO → SEA Jul 18, 19:34 UTCJul 18, 20:36 UTC1h 2m
2026-07-18 SKW3115 MCI → PHX Jul 18, 05:00 UTCJul 18, 06:30 UTC1h 30m
2026-07-18 SKW3030 SJC → PDX Jul 18, 01:50 UTCJul 18, 03:05 UTC1h 16m
2026-07-17 SKW3029 - Jul 17, 23:50 UTCJul 18, 00:45 UTC55m
2026-07-17 SKW3123 SLC → SAN Jul 17, 21:05 UTCJul 17, 22:45 UTC1h 40m
2026-07-17 SKW3112 PDX → SLC Jul 17, 18:19 UTCJul 17, 19:55 UTC1h 35m
2026-07-17 SKW3370 - Jul 17, 14:35 UTCJul 17, 16:34 UTC2h 0m
2026-07-17 SKW3370 PSP → PDX Jul 17, 14:35 UTCJul 17, 16:17 UTC1h 42m

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 N176SY page for operator, model, and routing details .

Mode-S A1311E frequently asked

What is Mode-S code A1311E?
A1311E is an ICAO 24-bit transponder address. Allocated to United States. Assigned to N176SY.
Where is Mode-S A1311E registered?
Mode-S code A1311E 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 A1311E broadcasting right now?
No active broadcast right now. Last signal was Jul 26, 16:30 UTC.
Hex, octal, and decimal Mode-S codes: what's the difference?
The same 24-bit identifier expressed in different bases: hex A1311E, octal 50230436, decimal 10,563,870.
What flights does A1311E operate?
Mode-S A1311E has broadcast 20 distinct callsigns, including SKW3304, SKW3303, SKW3294, SKW3324, SKW3259.