Apparatus

Try JFK, AAL1290, BAW, or N225AN.

sensors Mode-S transponder

A65598

ICAO 24-bit transponder address · allocated to United States

Currently assigned to N507SY · EMBRAER ERJ-170-200 (long wing) · operated by SKYWEST AIRLINES INC

Hex
A65598
Octal
51452630
Decimal
10,900,888
Country
US
Tail
N507SY
Type
E75L
Transponder active on ground
Flights observed
560
Distinct callsigns
20
Country
US
Last broadcast
44m ago

Last known position

Most recent position reported by Mode-S A65598.

Country allocation

The ICAO 24-bit address A65598 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
SKW6368 - 16 2026-07-11
SKW6361 - 14 2026-06-28
SKW6283 SkyWest Airlines 13 2026-05-06
SKW6253 - 12 2026-07-07
SKW5011 SkyWest Airlines 12 2026-05-20
SKW4915 - 12 2026-07-01
SKW6220 - 10 2026-07-11
SKW4925 - 10 2026-07-10
SKW4906 - 10 2026-07-01
SKW6435 SkyWest Airlines 9 2026-07-01
SKW6425 - 9 2026-06-25
SKW6367 - 9 2026-07-13
SKW6336 SkyWest Airlines 9 2026-06-19
SKW6188 - 9 2026-06-19
SKW4983 - 9 2026-07-09
SKW6378 SkyWest Airlines 8 2026-05-20
SKW6307 - 8 2026-06-27
SKW6272 - 8 2026-06-26
SKW6240 SkyWest Airlines 8 2026-05-06
SKW4987 SkyWest Airlines 8 2026-04-14

Recent flights last 50

DateFlightRouteTakeoffLandingDuration
2026-07-14 SKW6453 - Jul 14, 04:55 UTCJul 14, 05:20 UTC25m
2026-07-13 SKW6453 FSD → TUS Jul 13, 23:45 UTCJul 14, 02:55 UTC3h 10m
2026-07-13 SKW9923 PHX → FSD Jul 13, 20:20 UTCJul 13, 22:35 UTC2h 15m
2026-07-13 SKW9923 PHX → FSD Jul 13, 20:10 UTCJul 13, 22:35 UTC2h 25m
2026-07-13 SKW6367 - Jul 13, 18:30 UTCJul 13, 18:55 UTC25m
2026-07-13 SKW6367 TUS → PHX Jul 13, 18:40 UTCJul 13, 18:53 UTC13m
2026-07-13 SKW6367 PHX → TUS Jul 13, 17:15 UTCJul 13, 17:40 UTC25m
2026-07-13 SKW6404 - Jul 13, 13:00 UTCJul 13, 14:45 UTC1h 45m
2026-07-13 SKW6260 LAX → SFO Jul 13, 05:33 UTCJul 13, 06:31 UTC58m
2026-07-13 SKW6260 - Jul 13, 05:20 UTCJul 13, 06:10 UTC50m
2026-07-13 SKW4958 DEN → LAX Jul 13, 00:30 UTCJul 13, 02:35 UTC2h 5m
2026-07-12 SKW4958 - Jul 12, 21:10 UTCJul 12, 23:20 UTC2h 10m
2026-07-12 SKW4977 - Jul 12, 15:35 UTCJul 12, 20:10 UTC4h 35m
2026-07-12 SKW6227 - Jul 12, 11:15 UTCJul 12, 13:55 UTC2h 40m
2026-07-12 SKW6227 OMA → LAX Jul 12, 11:13 UTCJul 12, 13:54 UTC2h 41m
2026-07-12 SKW6420 PHX → OMA Jul 12, 02:26 UTCJul 12, 04:41 UTC2h 15m
2026-07-12 SKW6420 - Jul 12, 02:30 UTCJul 12, 04:45 UTC2h 15m
2026-07-11 SKW6220 - Jul 11, 22:40 UTCJul 12, 00:50 UTC2h 10m
2026-07-11 SKW6220 PSC → PHX Jul 11, 22:34 UTCJul 12, 00:50 UTC2h 16m
2026-07-11 SKW6220 - Jul 11, 19:10 UTCJul 11, 21:15 UTC2h 5m
2026-07-11 SKW4970 LAS → PHX Jul 11, 16:50 UTCJul 11, 17:40 UTC50m
2026-07-11 SKW4970 LAS → PHX Jul 11, 16:49 UTCJul 11, 17:36 UTC47m
2026-07-11 SKW4970 PHX → LAS Jul 11, 15:00 UTCJul 11, 15:45 UTC45m
2026-07-11 SKW4893 - Jul 11, 11:15 UTCJul 11, 13:40 UTC2h 25m
2026-07-11 SKW6420 PHX → OMA Jul 11, 02:50 UTCJul 11, 05:05 UTC2h 15m
2026-07-11 SKW6368 - Jul 11, 01:20 UTCJul 11, 01:45 UTC25m
2026-07-11 SKW6368 TUS → PHX Jul 11, 01:05 UTCJul 11, 01:38 UTC33m
2026-07-10 SKW6368 PHX → TUS Jul 10, 23:50 UTCJul 11, 00:20 UTC30m
2026-07-10 SKW4925 HMO → PHX Jul 10, 21:05 UTCJul 10, 21:55 UTC50m
2026-07-10 SKW4925 HMO → PHX Jul 10, 21:02 UTCJul 10, 21:55 UTC53m
2026-07-10 SKW4925 PHX → HMO Jul 10, 19:20 UTCJul 10, 20:10 UTC50m
2026-07-10 SKW4893 - Jul 10, 15:50 UTCJul 10, 18:10 UTC2h 20m
2026-07-10 SKW4893 OMA → PHX Jul 10, 15:47 UTCJul 10, 18:15 UTC2h 28m
2026-07-10 SKW6420 PHX → OMA Jul 10, 03:22 UTCJul 10, 05:48 UTC2h 26m
2026-07-10 SKW6420 PHX → OMA Jul 10, 03:25 UTCJul 10, 06:00 UTC2h 35m
2026-07-09 SKW6415 BUR → PHX Jul 9, 23:55 UTCJul 10, 01:05 UTC1h 10m
2026-07-09 SKW6415 BUR → PHX Jul 9, 23:53 UTCJul 10, 01:00 UTC1h 7m
2026-07-09 SKW6415 PHX → BUR Jul 9, 21:55 UTCJul 9, 23:00 UTC1h 5m
2026-07-09 SKW4925 HMO → PHX Jul 9, 19:15 UTCJul 9, 20:05 UTC50m
2026-07-09 SKW4925 PHX → HMO Jul 9, 17:25 UTCJul 9, 18:20 UTC55m
2026-07-09 SKW4983 - Jul 9, 13:00 UTCJul 9, 15:50 UTC2h 50m
2026-07-09 SKW4982 - Jul 9, 02:20 UTCJul 9, 05:25 UTC3h 5m
2026-07-08 SKW6220 - Jul 8, 22:35 UTCJul 9, 00:45 UTC2h 10m
2026-07-08 SKW6220 - Jul 8, 19:15 UTCJul 8, 21:25 UTC2h 10m
2026-07-08 SKW6367 TUS → PHX Jul 8, 17:25 UTCJul 8, 17:55 UTC30m
2026-07-08 SKW6367 PHX → TUS Jul 8, 16:10 UTCJul 8, 16:35 UTC25m
2026-07-08 SKW6360 - Jul 8, 12:35 UTCJul 8, 14:45 UTC2h 10m
2026-07-08 SKW6360 PSC → PHX Jul 8, 12:30 UTCJul 8, 14:40 UTC2h 10m
2026-07-08 SKW6292 - Jul 8, 03:40 UTCJul 8, 05:50 UTC2h 10m
2026-07-07 SKW6253 MFR → PHX Jul 7, 20:40 UTCJul 7, 22:40 UTC2h 0m

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 N507SY page for operator, model, and routing details .

Mode-S A65598 frequently asked

What is Mode-S code A65598?
A65598 is an ICAO 24-bit transponder address. Allocated to United States. Assigned to N507SY.
Where is Mode-S A65598 registered?
Mode-S code A65598 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 A65598 broadcasting right now?
Mode-S A65598 is currently broadcasting from the ground.
Hex, octal, and decimal Mode-S codes: what's the difference?
The same 24-bit identifier expressed in different bases: hex A65598, octal 51452630, decimal 10,900,888.
What flights does A65598 operate?
Mode-S A65598 has broadcast 20 distinct callsigns, including SKW6368, SKW6361, SKW6283, SKW6253, SKW5011.