Apparatus

Try JFK, AAL1290, BAW, or N225AN.

sensors Mode-S transponder

A7E691

ICAO 24-bit transponder address · allocated to United States

Currently assigned to N608SK · BOMBARDIER Regional Jet CRJ-700 · operated by SKYWEST AIRLINES INC

Hex
A7E691
Octal
51763221
Decimal
11,003,537
Country
US
Tail
N608SK
Type
CRJ7
No current signal · last broadcast Jul 26, 21:45 UTC
Flights observed
715
Distinct callsigns
20
Country
US
Last broadcast
Jul 26, 21:45 UTC

Last known position

Most recent position reported by Mode-S A7E691.

Country allocation

The ICAO 24-bit address A7E691 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
SKW6459 - 14 2026-06-25
SKW6439 SkyWest Airlines 14 2026-06-10
SKW4969 SkyWest Airlines 13 2026-07-26
SKW4913 - 10 2026-07-19
SKW6458 SkyWest Airlines 9 2026-04-26
SKW6450 SkyWest Airlines 9 2026-06-11
SKW6232 - 9 2026-07-16
SKW6229 SkyWest Airlines 9 2026-06-12
SKW6384 SkyWest Airlines 8 2026-05-14
SKW6196 SkyWest Airlines 8 2026-06-10
SKW6352 SkyWest Airlines 7 2026-06-07
SKW6273 - 7 2026-07-16
SKW6226 - 7 2026-07-17
SKW4954 - 7 2026-07-12
SKW6517 - 6 2026-07-16
SKW6457 SkyWest Airlines 6 2026-04-22
SKW6440 SkyWest Airlines 6 2026-06-23
SKW6383 SkyWest Airlines 6 2026-07-07
SKW6379 SkyWest Airlines 6 2026-06-12
SKW6373 SkyWest Airlines 6 2026-05-20

Recent flights last 50

DateFlightRouteTakeoffLandingDuration
2026-07-26 SKW6249 PHX → GJT Jul 26, 20:25 UTCJul 26, 21:35 UTC1h 10m
2026-07-26 SKW6249 PHX → GJT Jul 26, 18:35 UTCJul 26, 19:30 UTC55m
2026-07-26 SKW4969 DFW → LRD Jul 26, 14:05 UTCJul 26, 14:15 UTC10m
2026-07-26 SKW4969 DFW → LRD Jul 26, 14:10 UTCJul 26, 15:12 UTC1h 2m
2026-07-26 SKW4969 DFW → LRD Jul 26, 12:35 UTCJul 26, 13:25 UTC50m
2026-07-26 SKW6358 MKE → ORD Jul 26, 10:50 UTCJul 26, 11:25 UTC35m
2026-07-24 SKW4888 SJC → PHX Jul 24, 00:55 UTCJul 24, 01:20 UTC25m
2026-07-23 SKW6411 SFO → LAX Jul 23, 19:35 UTCJul 23, 22:05 UTC2h 30m
2026-07-23 SKW6411 SFO → LAX Jul 23, 19:29 UTCJul 23, 21:50 UTC2h 21m
2026-07-23 SKW6219 LAX → DEN Jul 23, 16:00 UTCJul 23, 18:10 UTC2h 10m
2026-07-23 SKW6219 LAX → DEN Jul 23, 15:31 UTCJul 23, 18:16 UTC2h 45m
2026-07-23 SKW6195 ELP → ORD Jul 23, 13:55 UTCJul 23, 14:20 UTC25m
2026-07-23 SKW4999 BPT → DFW Jul 23, 04:55 UTCJul 23, 05:24 UTC29m
2026-07-23 SKW4999 BPT → DFW Jul 23, 05:00 UTCJul 23, 05:25 UTC25m
2026-07-23 SKW6295 PHX → SFO Jul 23, 00:05 UTCJul 23, 01:25 UTC1h 20m
2026-07-22 SKW6295 PHX → SFO Jul 22, 21:45 UTCJul 22, 23:00 UTC1h 15m
2026-07-22 SKW6299 ORD → STL Jul 22, 19:20 UTCJul 22, 20:15 UTC55m
2026-07-22 SKW6299 ORD → STL Jul 22, 19:07 UTCJul 22, 20:17 UTC1h 10m
2026-07-22 SKW6299 ORD → STL Jul 22, 16:35 UTCJul 22, 17:50 UTC1h 15m
2026-07-22 SKW6335 SBN → DFW Jul 22, 12:20 UTCJul 22, 14:15 UTC1h 55m
2026-07-22 SKW6335 SBN → DFW Jul 22, 12:16 UTCJul 22, 14:11 UTC1h 55m
2026-07-22 SKW6305 DFW → SBN Jul 22, 01:20 UTCJul 22, 03:10 UTC1h 50m
2026-07-21 SKW5010 ORD → FSD Jul 21, 20:10 UTCJul 21, 22:25 UTC2h 15m
2026-07-21 SKW5010 ORD → FSD Jul 21, 20:07 UTCJul 21, 22:22 UTC2h 15m
2026-07-21 SKW6417 DFW → ICT Jul 21, 16:10 UTCJul 21, 18:30 UTC2h 20m
2026-07-21 SKW4974 CMH → ORD Jul 21, 13:00 UTCJul 21, 13:55 UTC55m
2026-07-21 SKW4972 CVG → DFW Jul 21, 02:25 UTCJul 21, 03:05 UTC40m
2026-07-21 SKW4972 CVG → DFW Jul 21, 02:10 UTCJul 21, 03:00 UTC50m
2026-07-20 SKW4909 - Jul 20, 23:35 UTCJul 21, 00:30 UTC55m
2026-07-20 SKW4909 - Jul 20, 21:35 UTCJul 20, 22:30 UTC55m
2026-07-20 SKW4989 DFW → CVG Jul 20, 18:45 UTCJul 20, 20:00 UTC1h 15m
2026-07-20 SKW4989 DFW → CVG Jul 20, 18:44 UTCJul 20, 19:55 UTC1h 11m
2026-07-20 SKW4989 DFW → CVG Jul 20, 16:15 UTCJul 20, 17:35 UTC1h 20m
2026-07-20 SKW6213 - Jul 20, 12:40 UTCJul 20, 13:25 UTC45m
2026-07-20 SKW4941 PHX → MRY Jul 20, 01:35 UTCJul 20, 01:55 UTC20m
2026-07-20 SKW4941 PHX → MRY Jul 20, 01:35 UTCJul 20, 01:53 UTC18m
2026-07-19 SKW4913 - Jul 19, 21:50 UTCJul 19, 23:20 UTC1h 30m
2026-07-19 SKW4913 BUF → ORD Jul 19, 21:46 UTCJul 19, 23:11 UTC1h 25m
2026-07-19 SKW4913 - Jul 19, 19:40 UTCJul 19, 20:45 UTC1h 5m
2026-07-19 SKW6263 - Jul 19, 14:30 UTCJul 19, 15:00 UTC30m
2026-07-19 SKW6263 - Jul 19, 13:05 UTCJul 19, 13:25 UTC20m
2026-07-19 SKW4904 - Jul 19, 10:50 UTCJul 19, 11:50 UTC1h 0m
2026-07-19 SKW4916 - Jul 19, 03:00 UTCJul 19, 03:35 UTC35m
2026-07-19 SKW4916 ORD → FNT Jul 19, 02:56 UTCJul 19, 03:34 UTC38m
2026-07-18 SKW4955 - Jul 18, 20:25 UTCJul 18, 22:30 UTC2h 5m
2026-07-18 SKW4955 ORD → COS Jul 18, 15:30 UTCJul 18, 17:30 UTC2h 0m
2026-07-18 SKW6213 - Jul 18, 13:00 UTCJul 18, 13:25 UTC25m
2026-07-18 SKW6357 ORD → MKE Jul 18, 04:20 UTCJul 18, 04:35 UTC15m
2026-07-18 SKW6211 - Jul 18, 01:54 UTCJul 18, 02:35 UTC40m
2026-07-17 SKW6211 ORD → MKE Jul 17, 23:35 UTCJul 17, 23:55 UTC20m

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 N608SK page for operator, model, and routing details .

Mode-S A7E691 frequently asked

What is Mode-S code A7E691?
A7E691 is an ICAO 24-bit transponder address. Allocated to United States. Assigned to N608SK.
Where is Mode-S A7E691 registered?
Mode-S code A7E691 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 A7E691 broadcasting right now?
No active broadcast right now. Last signal was Jul 26, 21:45 UTC.
Hex, octal, and decimal Mode-S codes: what's the difference?
The same 24-bit identifier expressed in different bases: hex A7E691, octal 51763221, decimal 11,003,537.
What flights does A7E691 operate?
Mode-S A7E691 has broadcast 20 distinct callsigns, including SKW6459, SKW6439, SKW4969, SKW4913, SKW6458.