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sensors Mode-S transponder

A11AD4

ICAO 24-bit transponder address · allocated to United States

Currently assigned to N170SY · EMBRAER ERJ-170-200 (long wing) · operated by SKYWEST AIRLINES INC

Hex
A11AD4
Octal
50215324
Decimal
10,558,164
Country
US
Tail
N170SY
Type
E75L
No current signal · last broadcast Jul 26, 23:00 UTC
Flights observed
680
Distinct callsigns
20
Country
US
Last broadcast
Jul 26, 23:00 UTC

Last known position

Most recent position reported by Mode-S A11AD4.

Country allocation

The ICAO 24-bit address A11AD4 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
SKW3260 - 10 2026-07-20
SKW3101 SkyWest Airlines 9 2026-06-21
SKW3394 SkyWest Airlines 8 2026-06-01
SKW3102 SkyWest Airlines 7 2026-07-04
SKW3498 - 6 2026-07-13
SKW3438 SkyWest Airlines 6 2026-06-19
SKW3413 SkyWest Airlines 6 2026-07-26
SKW3385 SkyWest Airlines 6 2026-07-04
SKW3370 - 6 2026-07-24
SKW3360 SkyWest Airlines 6 2026-06-16
SKW3300 - 6 2026-07-18
SKW3287 - 6 2026-06-28
SKW3219 - 6 2026-07-19
SKW3068 SkyWest Airlines 6 2026-07-26
SKW3060 SkyWest Airlines 6 2026-07-25
SKW3033 SkyWest Airlines 6 2026-06-09
SKW3026 - 6 2026-07-11
SKW3023 SkyWest Airlines 6 2026-06-13
SKW3432 - 5 2026-07-02
SKW3384 - 5 2026-07-25

Recent flights last 50

DateFlightRouteTakeoffLandingDuration
2026-07-26 SKW3095 ACT → DFW Jul 26, 21:05 UTCJul 26, 23:00 UTC1h 55m
2026-07-26 SKW3209 FAT → SEA Jul 26, 18:15 UTCJul 26, 19:50 UTC1h 35m
2026-07-26 SKW3116 SLC → SAN Jul 26, 15:10 UTCJul 26, 17:00 UTC1h 50m
2026-07-26 SKW3413 SJC → BOI Jul 26, 02:45 UTCJul 26, 03:55 UTC1h 10m
2026-07-26 SKW3068 SAN → PHX Jul 26, 01:02 UTCJul 26, 01:50 UTC48m
2026-07-26 SKW3068 SAN → PHX Jul 26, 00:55 UTCJul 26, 01:55 UTC1h 0m
2026-07-25 SKW3221 EUG → LAX Jul 25, 22:25 UTCJul 25, 23:25 UTC1h 0m
2026-07-25 SKW3346 LAX → SFO Jul 25, 20:05 UTCJul 25, 20:55 UTC50m
2026-07-25 SKW3313 OAK → SAN Jul 25, 17:51 UTCJul 25, 19:02 UTC1h 11m
2026-07-25 SKW3313 OAK → SAN Jul 25, 17:50 UTCJul 25, 19:05 UTC1h 15m
2026-07-25 SKW3320 - Jul 25, 15:25 UTCJul 25, 16:30 UTC1h 5m
2026-07-25 SKW3384 - Jul 25, 13:15 UTCJul 25, 14:20 UTC1h 5m
2026-07-25 SKW3005 SAF → DFW Jul 25, 05:50 UTCJul 25, 06:40 UTC50m
2026-07-25 SKW3060 PHX → SAN Jul 25, 03:15 UTCJul 25, 04:05 UTC50m
2026-07-25 SKW3061 LAX → SJC Jul 25, 00:10 UTCJul 25, 01:10 UTC1h 0m
2026-07-24 SKW3123 LTO → DFW Jul 24, 21:10 UTCJul 24, 22:45 UTC1h 35m
2026-07-24 SKW3112 LAX → PDX Jul 24, 18:20 UTCJul 24, 19:55 UTC1h 35m
2026-07-24 SKW3370 - Jul 24, 14:35 UTCJul 24, 16:40 UTC2h 5m
2026-07-24 SKW3214 SJC → LAX Jul 24, 03:45 UTCJul 24, 06:00 UTC2h 15m
2026-07-24 SKW3124 SFO → LAX Jul 24, 01:45 UTCJul 24, 02:35 UTC50m
2026-07-24 SKW3126 LAX → SFO Jul 24, 00:00 UTCJul 24, 00:45 UTC45m
2026-07-23 SKW3138 YLW → SEA Jul 23, 21:00 UTCJul 23, 21:50 UTC50m
2026-07-23 SKW3254 FSD → ORD Jul 23, 19:00 UTCJul 23, 19:45 UTC45m
2026-07-23 SKW3284 LAX → PDX Jul 23, 15:00 UTCJul 23, 17:20 UTC2h 20m
2026-07-23 SKW3022 ORD → BNA Jul 23, 01:05 UTCJul 23, 03:10 UTC2h 5m
2026-07-22 SKW3202 LAX → PDX Jul 22, 23:15 UTCJul 23, 00:05 UTC50m
2026-07-22 SKW3075 STS → PSP Jul 22, 20:45 UTCJul 22, 22:20 UTC1h 35m
2026-07-22 SKW3205 SAN → SFO Jul 22, 18:45 UTCJul 22, 19:50 UTC1h 5m
2026-07-22 SKW3315 LAX → SEA Jul 22, 13:35 UTCJul 22, 14:55 UTC1h 20m
2026-07-22 SKW3302 - Jul 22, 04:25 UTCJul 22, 05:25 UTC1h 0m
2026-07-22 SKW3060 PHX → SAN Jul 22, 02:20 UTCJul 22, 03:15 UTC55m
2026-07-22 SKW3061 LAX → SJC Jul 22, 00:15 UTCJul 22, 01:15 UTC1h 0m
2026-07-21 SKW3084 SBN → DFW Jul 21, 20:19 UTCJul 21, 22:33 UTC2h 14m
2026-07-21 SKW3084 SBN → DFW Jul 21, 20:10 UTCJul 21, 22:40 UTC2h 30m
2026-07-21 SKW3085 - Jul 21, 16:30 UTCJul 21, 19:05 UTC2h 35m
2026-07-21 SKW3207 MFR → SAN Jul 21, 13:25 UTCJul 21, 15:10 UTC1h 45m
2026-07-21 SKW3321 BOI → SEA Jul 21, 03:05 UTCJul 21, 04:35 UTC1h 30m
2026-07-21 SKW3466 - Jul 21, 00:55 UTCJul 21, 01:55 UTC1h 0m
2026-07-20 SKW3093 - Jul 20, 22:30 UTCJul 20, 23:35 UTC1h 5m
2026-07-20 SKW3223 RDM → BUR Jul 20, 18:35 UTCJul 20, 20:25 UTC1h 50m
2026-07-20 SKW3224 - Jul 20, 15:40 UTCJul 20, 17:15 UTC1h 35m
2026-07-20 SKW3260 EUG → BUR Jul 20, 02:45 UTCJul 20, 04:30 UTC1h 45m
2026-07-20 SKW3199 SAN → SMF Jul 20, 00:50 UTCJul 20, 01:40 UTC50m
2026-07-19 SKW3408 PDX → FAT Jul 19, 23:00 UTCJul 19, 23:25 UTC25m
2026-07-19 SKW3204 SEA → PDX Jul 19, 21:15 UTCJul 19, 21:55 UTC40m
2026-07-19 SKW3204 SEA → PDX Jul 19, 21:06 UTCJul 19, 21:49 UTC43m
2026-07-19 SKW3078 LAX → SFO Jul 19, 19:19 UTCJul 19, 19:43 UTC24m
2026-07-19 SKW3090 BIS → DFW Jul 19, 17:30 UTCJul 19, 18:05 UTC35m
2026-07-19 SKW3219 - Jul 19, 14:20 UTCJul 19, 15:55 UTC1h 35m
2026-07-19 SKW3024 - Jul 19, 02:00 UTCJul 19, 03:25 UTC1h 25m

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 N170SY page for operator, model, and routing details .

Mode-S A11AD4 frequently asked

What is Mode-S code A11AD4?
A11AD4 is an ICAO 24-bit transponder address. Allocated to United States. Assigned to N170SY.
Where is Mode-S A11AD4 registered?
Mode-S code A11AD4 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 A11AD4 broadcasting right now?
No active broadcast right now. Last signal was Jul 26, 23:00 UTC.
Hex, octal, and decimal Mode-S codes: what's the difference?
The same 24-bit identifier expressed in different bases: hex A11AD4, octal 50215324, decimal 10,558,164.
What flights does A11AD4 operate?
Mode-S A11AD4 has broadcast 20 distinct callsigns, including SKW3260, SKW3101, SKW3394, SKW3102, SKW3498.