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sensors Mode-S transponder

A7D7B5

ICAO 24-bit transponder address · allocated to United States

Currently assigned to N604SK · BOMBARDIER Regional Jet CRJ-700 · operated by SKYWEST AIRLINES INC

Hex
A7D7B5
Octal
51753665
Decimal
10,999,733
Country
US
Tail
N604SK
Type
CRJ7
Broadcasting now · callsign SKW6209 · 1,375 ft
Flights observed
741
Distinct callsigns
20
Country
US
Last broadcast
Jul 26, 03:50 UTC

Current position

A7D7B5 is currently broadcasting. Map zoomed to live position.

Country allocation

The ICAO 24-bit address A7D7B5 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
SKW6437 SkyWest Airlines 10 2026-06-02
SKW6398 - 10 2026-07-11
SKW6274 - 10 2026-07-07
SKW4892 SkyWest Airlines 10 2026-07-24
SKW6450 SkyWest Airlines 9 2026-05-09
SKW6340 SkyWest Airlines 9 2026-06-18
SKW6251 SkyWest Airlines 9 2026-05-08
SKW6229 SkyWest Airlines 9 2026-05-09
SKW6326 - 8 2026-07-17
SKW6302 SkyWest Airlines 8 2026-06-03
SKW4984 SkyWest Airlines 8 2026-06-03
SKW4886 - 8 2026-07-04
SKW6458 SkyWest Airlines 7 2026-04-24
SKW6439 SkyWest Airlines 7 2026-04-27
SKW6329 - 7 2026-06-17
SKW6263 - 7 2026-07-14
SKW6256 SkyWest Airlines 7 2026-07-25
SKW6250 - 7 2026-07-16
SKW6244 - 7 2026-07-15
SKW5013 - 7 2026-06-28

Recent flights last 50

DateFlightRouteTakeoffLandingDuration
2026-07-26 SKW6198 OKC → ORD Jul 26, 02:25 UTCJul 26, 03:50 UTC1h 25m
2026-07-26 SKW6198 OKC → ORD Jul 26, 02:23 UTCJul 26, 03:46 UTC1h 23m
2026-07-25 SKW6256 ORD → MSN Jul 25, 21:30 UTCJul 25, 22:10 UTC40m
2026-07-25 SKW6256 ORD → MSN Jul 25, 19:45 UTCJul 25, 20:25 UTC40m
2026-07-25 SKW9910 LAX → SFO Jul 25, 17:55 UTCJul 25, 18:45 UTC50m
2026-07-24 SKW4892 DFW → FSM Jul 24, 02:15 UTCJul 24, 03:15 UTC1h 0m
2026-07-24 SKW4892 DFW → FSM Jul 24, 02:11 UTCJul 24, 03:32 UTC1h 21m
2026-07-24 SKW6359 PHX → STS Jul 24, 00:45 UTCJul 24, 01:15 UTC30m
2026-07-23 SKW6359 PHX → STS Jul 23, 23:10 UTCJul 23, 23:30 UTC20m
2026-07-23 SKW6394 LAX → DEN Jul 23, 20:50 UTCJul 23, 21:15 UTC25m
2026-07-23 SKW6394 LAX → DEN Jul 23, 20:47 UTCJul 23, 22:00 UTC1h 13m
2026-07-23 SKW6394 LAX → DEN Jul 23, 18:55 UTCJul 23, 20:00 UTC1h 5m
2026-07-23 SKW6375 - Jul 23, 15:20 UTCJul 23, 16:40 UTC1h 20m
2026-07-23 SKW6374 DFW → SJT Jul 23, 03:50 UTCJul 23, 05:10 UTC1h 20m
2026-07-23 SKW6298 LAX → SFO Jul 23, 01:00 UTCJul 23, 01:50 UTC50m
2026-07-23 SKW6298 LAX → SFO Jul 23, 01:02 UTCJul 23, 01:47 UTC45m
2026-07-22 SKW6513 FLG → PHX Jul 22, 22:10 UTCJul 22, 23:45 UTC1h 35m
2026-07-22 SKW5012 IAH → PHX Jul 22, 19:35 UTCJul 22, 21:20 UTC1h 45m
2026-07-22 SKW5012 IAH → PHX Jul 22, 16:35 UTCJul 22, 18:05 UTC1h 30m
2026-07-22 SKW6265 SFO → LAX Jul 22, 14:05 UTCJul 22, 15:10 UTC1h 5m
2026-07-22 SKW6265 SFO → LAX Jul 22, 14:08 UTCJul 22, 15:04 UTC56m
2026-07-21 SKW6346 ORD → BNA Jul 21, 23:55 UTCJul 22, 00:55 UTC1h 0m
2026-07-21 SKW6346 ORD → BNA Jul 21, 23:50 UTCJul 22, 00:51 UTC1h 1m
2026-07-21 SKW5012 IAH → PHX Jul 21, 20:25 UTCJul 21, 22:10 UTC1h 45m
2026-07-21 SKW5012 IAH → PHX Jul 21, 16:40 UTCJul 21, 18:10 UTC1h 30m
2026-07-21 SKW6265 SFO → LAX Jul 21, 14:20 UTCJul 21, 15:20 UTC1h 0m
2026-07-21 SKW4908 LAX → SMF Jul 21, 05:15 UTCJul 21, 06:20 UTC1h 5m
2026-07-21 SKW4945 TXK → DFW Jul 21, 01:45 UTCJul 21, 03:15 UTC1h 30m
2026-07-21 SKW4945 TXK → DFW Jul 21, 01:46 UTCJul 21, 03:06 UTC1h 20m
2026-07-20 SKW4947 IDA → PHX Jul 20, 23:50 UTCJul 21, 00:45 UTC55m
2026-07-20 SKW4947 IDA → PHX Jul 20, 23:49 UTCJul 21, 00:40 UTC51m
2026-07-20 SKW6517 PHX → SBA Jul 20, 20:35 UTCJul 20, 22:35 UTC2h 0m
2026-07-20 SKW6273 HOU → DFW Jul 20, 17:30 UTCJul 20, 19:10 UTC1h 40m
2026-07-20 SKW6273 HOU → DFW Jul 20, 17:28 UTCJul 20, 18:59 UTC1h 31m
2026-07-20 SKW6232 SMF → PHX Jul 20, 15:25 UTCJul 20, 15:55 UTC30m
2026-07-20 SKW6232 SMF → PHX Jul 20, 15:19 UTCJul 20, 15:43 UTC24m
2026-07-20 SKW6232 SMF → PHX Jul 20, 13:30 UTCJul 20, 13:55 UTC25m
2026-07-20 SKW6465 DTW → ORD Jul 20, 10:50 UTCJul 20, 11:40 UTC50m
2026-07-19 SKW4931 - Jul 19, 01:15 UTCJul 19, 02:05 UTC50m
2026-07-19 SKW4931 ORD → DTW Jul 19, 01:12 UTCJul 19, 02:04 UTC52m
2026-07-18 SKW4833 - Jul 18, 22:20 UTCJul 18, 23:45 UTC1h 25m
2026-07-18 SKW4833 LWB → ORD Jul 18, 22:13 UTCJul 18, 23:40 UTC1h 27m
2026-07-18 SKW4830 - Jul 18, 19:05 UTCJul 18, 19:40 UTC35m
2026-07-18 SKW4830 CLT → LWB Jul 18, 19:04 UTCJul 18, 19:22 UTC18m
2026-07-18 SKW6247 - Jul 18, 13:50 UTCJul 18, 14:45 UTC55m
2026-07-18 SKW6247 CMH → CLT Jul 18, 13:49 UTCJul 18, 14:45 UTC56m
2026-07-18 SKW6247 - Jul 18, 11:50 UTCJul 18, 12:40 UTC50m
2026-07-18 SKW4827 - Jul 18, 09:30 UTCJul 18, 10:10 UTC40m
2026-07-18 SKW4827 SHD → CLT Jul 18, 09:26 UTCJul 18, 10:12 UTC46m
2026-07-18 SKW4832 - Jul 18, 00:19 UTCJul 18, 01:45 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 N604SK page for operator, model, and routing details .

Mode-S A7D7B5 frequently asked

What is Mode-S code A7D7B5?
A7D7B5 is an ICAO 24-bit transponder address. Allocated to United States. Assigned to N604SK.
Where is Mode-S A7D7B5 registered?
Mode-S code A7D7B5 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 A7D7B5 broadcasting right now?
Yes. Mode-S A7D7B5 is currently airborne.
Hex, octal, and decimal Mode-S codes: what's the difference?
The same 24-bit identifier expressed in different bases: hex A7D7B5, octal 51753665, decimal 10,999,733.
What flights does A7D7B5 operate?
Mode-S A7D7B5 has broadcast 20 distinct callsigns, including SKW6437, SKW6398, SKW6274, SKW4892, SKW6450.