Apparatus

Try JFK, AAL1290, BAW, or N225AN.

sensors Mode-S transponder

A04F49

ICAO 24-bit transponder address · allocated to United States

Currently assigned to N119SY · EMBRAER ERJ-170-200 (long wing) · operated by SKYWEST AIRLINES INC

Hex
A04F49
Octal
50047511
Decimal
10,506,057
Country
US
Tail
N119SY
Type
E75L
No current signal · last broadcast Jul 26, 21:50 UTC
Flights observed
555
Distinct callsigns
20
Country
US
Last broadcast
Jul 26, 21:50 UTC

Last known position

Most recent position reported by Mode-S A04F49.

Country allocation

The ICAO 24-bit address A04F49 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
SKW5990 SkyWest Airlines 7 2026-06-19
SKW5318 - 7 2026-06-19
SKW5316 SkyWest Airlines 7 2026-06-18
SKW5216 SkyWest Airlines 7 2026-07-23
SKW5871 - 6 2026-06-18
SKW5387 SkyWest Airlines 6 2026-05-07
SKW5381 - 6 2026-07-18
SKW6005 SkyWest Airlines 5 2026-05-28
SKW5511 SkyWest Airlines 5 2026-07-22
SKW5475 SkyWest Airlines 5 2026-07-22
SKW5292 SkyWest Airlines 5 2026-05-07
SKW5284 SkyWest Airlines 5 2026-05-03
SKW5283 SkyWest Airlines 5 2026-05-03
SKW5985 - 4 2026-07-18
SKW5954 - 4 2026-07-20
SKW5934 SkyWest Airlines 4 2026-07-23
SKW5876 - 4 2026-07-09
SKW5875 - 4 2026-07-08
SKW5756 - 4 2026-07-18
SKW5608 - 4 2026-06-21

Recent flights last 50

DateFlightRouteTakeoffLandingDuration
2026-07-26 SKW4805 MSN → ORD Jul 26, 20:05 UTCJul 26, 21:50 UTC1h 45m
2026-07-26 SKW5288 TUL → ORD Jul 26, 16:50 UTCJul 26, 18:20 UTC1h 30m
2026-07-26 SKW4801 IND → ORD Jul 26, 14:10 UTCJul 26, 15:30 UTC1h 20m
2026-07-26 SKW4751 DEN → DIK Jul 26, 11:20 UTCJul 26, 12:35 UTC1h 15m
2026-07-25 SKW4766 CHS → ORD Jul 25, 21:00 UTCJul 25, 22:30 UTC1h 30m
2026-07-25 SKW5806 ORD → TVC Jul 25, 18:30 UTCJul 25, 19:25 UTC55m
2026-07-25 SKW5806 ORD → TVC Jul 25, 18:34 UTCJul 25, 19:19 UTC45m
2026-07-25 SKW5428 SFO → SBP Jul 25, 16:05 UTCJul 25, 17:00 UTC55m
2026-07-25 SKW5790 ORD → CRW Jul 25, 12:00 UTCJul 25, 14:10 UTC2h 10m
2026-07-25 SKW4638 BFL → SFO Jul 25, 01:30 UTCJul 25, 03:30 UTC2h 0m
2026-07-24 SKW4749 DTW → ORD Jul 24, 23:05 UTCJul 24, 23:50 UTC45m
2026-07-24 SKW418R DEN → MSN Jul 24, 20:35 UTCJul 24, 21:20 UTC45m
2026-07-24 SKW418R DEN → MSN Jul 24, 20:35 UTCJul 24, 21:19 UTC44m
2026-07-24 SKW4746 ONT → SFO Jul 24, 18:10 UTCJul 24, 18:55 UTC45m
2026-07-24 SKW4648 MBS → ORD Jul 24, 16:25 UTCJul 24, 17:15 UTC50m
2026-07-24 SKW4648 MBS → ORD Jul 24, 16:18 UTCJul 24, 17:13 UTC55m
2026-07-24 SKW5501 MSY → IAH Jul 24, 12:40 UTCJul 24, 14:00 UTC1h 20m
2026-07-24 SKW5228 OMA → SFO Jul 24, 02:55 UTCJul 24, 04:00 UTC1h 5m
2026-07-24 SKW5228 OMA → SFO Jul 24, 03:03 UTCJul 24, 04:17 UTC1h 14m
2026-07-23 SKW5844 CMH → ORD Jul 23, 22:55 UTCJul 24, 00:40 UTC1h 45m
2026-07-23 SKW5844 CMH → ORD Jul 23, 22:56 UTCJul 24, 00:22 UTC1h 26m
2026-07-23 SKW5999 ORD → HRL Jul 23, 18:20 UTCJul 23, 19:55 UTC1h 35m
2026-07-23 SKW4680 GSP → ORD Jul 23, 15:15 UTCJul 23, 16:55 UTC1h 40m
2026-07-23 SKW4680 GSP → ORD Jul 23, 15:03 UTCJul 23, 16:42 UTC1h 39m
2026-07-23 SKW5216 SJC → DEN Jul 23, 12:30 UTCJul 23, 14:00 UTC1h 30m
2026-07-23 SKW5216 SJC → DEN Jul 23, 12:16 UTCJul 23, 14:09 UTC1h 53m
2026-07-23 SKW5934 ORD → FCA Jul 23, 01:20 UTCJul 23, 02:35 UTC1h 15m
2026-07-22 SKW5591 LAX → FAT Jul 22, 22:40 UTCJul 22, 23:45 UTC1h 5m
2026-07-22 SKW5511 SGF → DEN Jul 22, 18:15 UTCJul 22, 19:34 UTC1h 19m
2026-07-22 SKW5511 SGF → DEN Jul 22, 18:05 UTCJul 22, 19:50 UTC1h 45m
2026-07-22 SKW5475 SFO → MFR Jul 22, 14:50 UTCJul 22, 16:35 UTC1h 45m
2026-07-22 SKW5786 LAX → ASE Jul 22, 11:10 UTCJul 22, 12:30 UTC1h 20m
2026-07-22 SKW5442 SEA → SFO Jul 22, 01:50 UTCJul 22, 03:35 UTC1h 45m
2026-07-21 SKW5654 SUN → ORD Jul 21, 19:30 UTCJul 21, 21:45 UTC2h 15m
2026-07-21 SKW5654 SUN → ORD Jul 21, 19:18 UTCJul 21, 21:30 UTC2h 12m
2026-07-21 SKW5473 SNA → SFO Jul 21, 16:45 UTCJul 21, 18:15 UTC1h 30m
2026-07-21 SKW5473 SNA → SFO Jul 21, 16:20 UTCJul 21, 18:33 UTC2h 13m
2026-07-21 SKW5501 - Jul 21, 12:45 UTCJul 21, 14:20 UTC1h 35m
2026-07-21 SKW5501 LIT → ORD Jul 21, 12:36 UTCJul 21, 14:13 UTC1h 37m
2026-07-21 SKW5228 OMA → SFO Jul 21, 03:20 UTCJul 21, 04:30 UTC1h 10m
2026-07-21 SKW5228 OMA → SFO Jul 21, 03:03 UTCJul 21, 04:30 UTC1h 27m
2026-07-20 SKW5483 MSP → SFO Jul 20, 23:40 UTCJul 21, 00:30 UTC50m
2026-07-20 SKW5483 MSP → SFO Jul 20, 23:37 UTCJul 21, 00:33 UTC56m
2026-07-20 SKW5954 - Jul 20, 21:30 UTCJul 20, 22:20 UTC50m
2026-07-20 SKW5954 ORD → DTW Jul 20, 21:33 UTCJul 20, 22:19 UTC46m
2026-07-20 SKW5976 SHV → IAH Jul 20, 15:05 UTCJul 20, 18:05 UTC3h 0m
2026-07-20 SKW5976 SHV → IAH Jul 20, 14:55 UTCJul 20, 17:37 UTC2h 42m
2026-07-20 SKW6021 TUL → DTW Jul 20, 01:30 UTCJul 20, 03:20 UTC1h 50m
2026-07-19 SKW4749 DAY → ORD Jul 19, 22:35 UTCJul 19, 23:30 UTC55m
2026-07-19 SKW418R DEN → MSN Jul 19, 20:55 UTCJul 19, 21:45 UTC50m

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 N119SY page for operator, model, and routing details .

Mode-S A04F49 frequently asked

What is Mode-S code A04F49?
A04F49 is an ICAO 24-bit transponder address. Allocated to United States. Assigned to N119SY.
Where is Mode-S A04F49 registered?
Mode-S code A04F49 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 A04F49 broadcasting right now?
No active broadcast right now. Last signal was Jul 26, 21:50 UTC.
Hex, octal, and decimal Mode-S codes: what's the difference?
The same 24-bit identifier expressed in different bases: hex A04F49, octal 50047511, decimal 10,506,057.
What flights does A04F49 operate?
Mode-S A04F49 has broadcast 20 distinct callsigns, including SKW5990, SKW5318, SKW5316, SKW5216, SKW5871.