Apparatus

Try JFK, AAL1290, BAW, or N225AN.

sensors Mode-S transponder

A10D56

ICAO 24-bit transponder address · allocated to United States

Currently assigned to N167SY · EMBRAER ERJ-170-200 (long wing) · operated by SKYWEST AIRLINES INC

Hex
A10D56
Octal
50206526
Decimal
10,554,710
Country
US
Tail
N167SY
Type
E75L
No current signal · last broadcast Jul 26, 21:20 UTC
Flights observed
624
Distinct callsigns
20
Country
US
Last broadcast
Jul 26, 21:20 UTC

Last known position

Most recent position reported by Mode-S A10D56.

Country allocation

The ICAO 24-bit address A10D56 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
SKW5639 SkyWest Airlines 8 2026-05-10
SKW5475 - 8 2026-07-08
SKW5216 SkyWest Airlines 7 2026-07-21
SKW5867 SkyWest Airlines 6 2026-06-14
SKW5664 SkyWest Airlines 6 2026-05-17
SKW5586 - 6 2026-07-18
SKW5414 - 6 2026-07-14
SKW5381 - 6 2026-07-22
SKW5272 SkyWest Airlines 6 2026-05-19
SKW5985 - 5 2026-07-15
SKW5941 - 5 2026-06-23
SKW5844 - 5 2026-07-21
SKW5798 - 5 2026-07-14
SKW5764 SkyWest Airlines 5 2026-05-19
SKW5497 SkyWest Airlines 5 2026-05-17
SKW5413 - 5 2026-07-03
SKW5214 SkyWest Airlines 5 2026-06-09
SKW4719 - 5 2026-06-16
SKW4697 SkyWest Airlines 5 2026-05-19
SKW6020 SkyWest Airlines 4 2026-06-11

Recent flights last 50

DateFlightRouteTakeoffLandingDuration
2026-07-26 SKW5937 SFO → SNA Jul 26, 18:50 UTCJul 26, 21:20 UTC2h 30m
2026-07-26 SKW5905 SFO → SBA Jul 26, 14:30 UTCJul 26, 16:55 UTC2h 25m
2026-07-26 SKW4651 MFR → SFO Jul 26, 11:00 UTCJul 26, 12:30 UTC1h 30m
2026-07-25 SKW5663 SFO → FAT Jul 25, 23:50 UTCJul 26, 01:00 UTC1h 10m
2026-07-25 SKW5398 YOW → ORD Jul 25, 19:45 UTCJul 25, 21:30 UTC1h 45m
2026-07-25 SKW5680 SFO → SBP Jul 25, 15:05 UTCJul 25, 16:45 UTC1h 40m
2026-07-25 SKW5680 SFO → SBP Jul 25, 14:39 UTCJul 25, 17:50 UTC3h 11m
2026-07-25 SKW5902 SFO → GEG Jul 25, 11:45 UTCJul 25, 12:35 UTC50m
2026-07-25 SKW5768 SBN → ORD Jul 25, 01:10 UTCJul 25, 01:35 UTC25m
2026-07-24 SKW6004 ORD → SUN Jul 24, 20:00 UTCJul 24, 22:50 UTC2h 50m
2026-07-24 SKW5574 SJC → LAX Jul 24, 16:20 UTCJul 24, 18:45 UTC2h 25m
2026-07-24 SKW5574 SJC → LAX Jul 24, 16:05 UTCJul 24, 18:47 UTC2h 42m
2026-07-24 SKW5485 RNO → SFO Jul 24, 11:25 UTCJul 24, 12:30 UTC1h 5m
2026-07-24 SKW379P ORD → MCW Jul 24, 03:10 UTCJul 24, 04:05 UTC55m
2026-07-24 SKW6050 ORD → GEG Jul 24, 00:25 UTCJul 24, 01:30 UTC1h 5m
2026-07-24 SKW6050 ORD → GEG Jul 24, 00:04 UTCJul 24, 01:38 UTC1h 34m
2026-07-23 SKW5230 SFO → PSC Jul 23, 22:10 UTCJul 23, 23:00 UTC50m
2026-07-23 SKW5570 SEA → SFO Jul 23, 18:20 UTCJul 23, 19:20 UTC1h 0m
2026-07-23 SKW5684 - Jul 23, 15:40 UTCJul 23, 16:50 UTC1h 10m
2026-07-23 SKW5786 LAX → ASE Jul 23, 10:15 UTCJul 23, 12:35 UTC2h 20m
2026-07-22 SKW5442 SEA → SFO Jul 22, 23:20 UTCJul 23, 01:10 UTC1h 50m
2026-07-22 SKW5381 - Jul 22, 18:25 UTCJul 22, 19:20 UTC55m
2026-07-22 SKW5381 DTW → ORD Jul 22, 18:26 UTCJul 22, 19:02 UTC36m
2026-07-22 SKW5756 - Jul 22, 16:30 UTCJul 22, 17:20 UTC50m
2026-07-22 SKW5811 BOS → ORD Jul 22, 12:15 UTCJul 22, 13:45 UTC1h 30m
2026-07-22 SKW5331 IAH → CMH Jul 22, 03:30 UTCJul 22, 05:10 UTC1h 40m
2026-07-21 SKW5844 OKC → ORD Jul 21, 22:40 UTCJul 22, 00:30 UTC1h 50m
2026-07-21 SKW5999 ORD → HRL Jul 21, 18:25 UTCJul 21, 20:15 UTC1h 50m
2026-07-21 SKW4680 GSP → ORD Jul 21, 14:55 UTCJul 21, 17:10 UTC2h 15m
2026-07-21 SKW5216 SJC → DEN Jul 21, 11:50 UTCJul 21, 13:15 UTC1h 25m
2026-07-20 SKW5844 OKC → ORD Jul 20, 22:50 UTCJul 21, 01:15 UTC2h 25m
2026-07-20 SKW5844 OKC → ORD Jul 20, 22:52 UTCJul 21, 00:59 UTC2h 7m
2026-07-20 SKW5999 ORD → HRL Jul 20, 18:10 UTCJul 20, 19:45 UTC1h 35m
2026-07-20 SKW4680 GSP → ORD Jul 20, 15:00 UTCJul 20, 16:40 UTC1h 40m
2026-07-20 SKW5216 SJC → DEN Jul 20, 11:50 UTCJul 20, 13:15 UTC1h 25m
2026-07-20 SKW5216 SJC → DEN Jul 20, 11:56 UTCJul 20, 13:18 UTC1h 22m
2026-07-19 SKW5265 - Jul 19, 11:20 UTCJul 19, 12:25 UTC1h 5m
2026-07-18 SKW5638 SFO → SMF Jul 18, 22:22 UTCJul 18, 23:03 UTC41m
2026-07-18 SKW5638 SFO → SMF Jul 18, 22:15 UTCJul 18, 23:05 UTC50m
2026-07-18 SKW5928 MFR → SFO Jul 18, 19:55 UTCJul 18, 20:50 UTC55m
2026-07-18 SKW5586 - Jul 18, 16:05 UTCJul 18, 16:40 UTC35m
2026-07-18 SKW5586 ORD → TVC Jul 18, 16:18 UTCJul 18, 16:42 UTC24m
2026-07-18 SKW5811 - Jul 18, 12:35 UTCJul 18, 14:15 UTC1h 40m
2026-07-18 SKW5331 IAH → CMH Jul 18, 04:35 UTCJul 18, 05:55 UTC1h 20m
2026-07-18 SKW5331 IAH → CMH Jul 18, 04:44 UTCJul 18, 06:21 UTC1h 37m
2026-07-18 SKW5390 MSO → SFO Jul 18, 01:45 UTCJul 18, 02:50 UTC1h 6m
2026-07-17 SKW5871 - Jul 17, 22:49 UTCJul 17, 23:50 UTC1h 0m
2026-07-17 SKW4746 - Jul 17, 19:55 UTCJul 17, 21:10 UTC1h 15m
2026-07-17 SKW4746 CVG → ORD Jul 17, 18:14 UTCJul 17, 20:50 UTC2h 36m
2026-07-17 SKW4648 - Jul 17, 16:00 UTCJul 17, 16:44 UTC45m

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 N167SY page for operator, model, and routing details .

Mode-S A10D56 frequently asked

What is Mode-S code A10D56?
A10D56 is an ICAO 24-bit transponder address. Allocated to United States. Assigned to N167SY.
Where is Mode-S A10D56 registered?
Mode-S code A10D56 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 A10D56 broadcasting right now?
No active broadcast right now. Last signal was Jul 26, 21:20 UTC.
Hex, octal, and decimal Mode-S codes: what's the difference?
The same 24-bit identifier expressed in different bases: hex A10D56, octal 50206526, decimal 10,554,710.
What flights does A10D56 operate?
Mode-S A10D56 has broadcast 20 distinct callsigns, including SKW5639, SKW5475, SKW5216, SKW5867, SKW5664.