Apparatus

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sensors Mode-S transponder

A7FBBB

ICAO 24-bit transponder address · allocated to United States

Currently assigned to N613UX · EMBRAER ERJ-170-200 (long wing) · operated by UNITED AIRLINES INC

Hex
A7FBBB
Octal
51775673
Decimal
11,008,955
Country
US
Tail
N613UX
Type
E75L
No current signal · last broadcast Jul 26, 22:45 UTC
Flights observed
692
Distinct callsigns
20
Country
US
Last broadcast
Jul 26, 22:45 UTC

Last known position

Most recent position reported by Mode-S A7FBBB.

Country allocation

The ICAO 24-bit address A7FBBB 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
SKW5491 - 9 2026-07-15
SKW4713 - 9 2026-07-02
SKW5536 - 8 2026-06-27
SKW5469 SkyWest Airlines 8 2026-07-26
SKW5834 SkyWest Airlines 7 2026-05-28
SKW5527 - 7 2026-07-19
SKW5410 SkyWest Airlines 7 2026-05-23
SKW5241 - 7 2026-07-02
SKW4649 SkyWest Airlines 7 2026-06-13
SKW5519 - 6 2026-06-22
SKW5394 - 6 2026-07-01
SKW5295 - 6 2026-06-28
SKW4796 SkyWest Airlines 6 2026-06-13
SKW4676 SkyWest Airlines 6 2026-05-10
SKW5907 SkyWest Airlines 5 2026-05-04
SKW5899 SkyWest Airlines 5 2026-05-23
SKW582Y - 5 2026-07-08
SKW5689 SkyWest Airlines 5 2026-05-04
SKW5673 - 5 2026-07-11
SKW5599 SkyWest Airlines 5 2026-07-20

Recent flights last 50

DateFlightRouteTakeoffLandingDuration
2026-07-26 SKW5469 DEN → PSP Jul 26, 22:35 UTCJul 26, 22:45 UTC10m
2026-07-26 SKW570R ORD → EAU Jul 26, 19:35 UTCJul 26, 20:10 UTC35m
2026-07-26 SKW5266 OKC → IAH Jul 26, 14:30 UTCJul 26, 17:45 UTC3h 15m
2026-07-26 SKW5719 PWM → ORD Jul 26, 01:05 UTCJul 26, 04:10 UTC3h 5m
2026-07-25 SKW5350 RDM → SFO Jul 25, 22:00 UTCJul 25, 23:30 UTC1h 30m
2026-07-25 SKW5337 ORD → SAV Jul 25, 19:25 UTCJul 25, 20:35 UTC1h 10m
2026-07-24 SKW5552 BUR → SFO Jul 24, 22:50 UTCJul 25, 18:00 UTC19h 10m
2026-07-24 SKW5651 SFO → ABQ Jul 24, 21:40 UTCJul 25, 18:00 UTC20h 20m
2026-07-24 SKW5309 SMF → SFO Jul 24, 18:10 UTCJul 24, 19:20 UTC1h 10m
2026-07-24 SKW5218 ABQ → SFO Jul 24, 15:40 UTCJul 24, 16:40 UTC1h 0m
2026-07-24 SKW5364 OKC → ORD Jul 24, 12:30 UTCJul 24, 14:30 UTC2h 0m
2026-07-24 SKW5364 OKC → ORD Jul 24, 12:45 UTCJul 24, 14:21 UTC1h 36m
2026-07-24 SKW4727 DEN → MKE Jul 24, 03:15 UTCJul 24, 04:35 UTC1h 20m
2026-07-24 SKW5418 SAV → ORD Jul 24, 00:55 UTCJul 24, 02:00 UTC1h 5m
2026-07-23 SKW4782 MSN → ORD Jul 23, 22:25 UTCJul 23, 23:25 UTC1h 0m
2026-07-23 SKW4686 LIT → DEN Jul 23, 19:00 UTCJul 23, 20:40 UTC1h 40m
2026-07-23 SKW5369 TYS → ORD Jul 23, 16:00 UTCJul 23, 17:35 UTC1h 35m
2026-07-23 SKW5369 TYS → ORD Jul 23, 15:56 UTCJul 23, 17:55 UTC1h 59m
2026-07-23 SKW5822 ORD → SDF Jul 23, 13:15 UTCJul 23, 14:35 UTC1h 20m
2026-07-22 SKW5219 ORD → GRB Jul 22, 23:40 UTCJul 23, 00:50 UTC1h 10m
2026-07-22 SKW4686 LIT → DEN Jul 22, 18:50 UTCJul 22, 20:35 UTC1h 45m
2026-07-22 SKW4686 LIT → DEN Jul 22, 18:46 UTCJul 22, 20:32 UTC1h 46m
2026-07-22 SKW5369 TYS → ORD Jul 22, 15:55 UTCJul 22, 17:30 UTC1h 35m
2026-07-22 SKW5369 TYS → ORD Jul 22, 15:58 UTCJul 22, 17:30 UTC1h 32m
2026-07-22 SKW5822 ORD → SDF Jul 22, 13:00 UTCJul 22, 14:25 UTC1h 25m
2026-07-22 SKW5822 ORD → SDF Jul 22, 13:10 UTCJul 22, 14:25 UTC1h 15m
2026-07-21 SKW5219 ORD → GRB Jul 21, 22:55 UTCJul 22, 00:10 UTC1h 15m
2026-07-21 SKW5219 ORD → GRB Jul 21, 22:58 UTCJul 22, 00:06 UTC1h 8m
2026-07-21 SKW5292 ORD → MTY Jul 21, 19:35 UTCJul 21, 21:40 UTC2h 5m
2026-07-21 SKW5299 SFO → FAT Jul 21, 17:40 UTCJul 21, 18:20 UTC40m
2026-07-21 SKW4756 SFO → SNA Jul 21, 14:30 UTCJul 21, 16:00 UTC1h 30m
2026-07-21 SKW5441 SFO → SBA Jul 21, 04:30 UTCJul 21, 05:40 UTC1h 10m
2026-07-21 SKW5441 SFO → SBA Jul 21, 04:26 UTCJul 21, 05:48 UTC1h 22m
2026-07-21 SKW5647 SBA → LAX Jul 21, 02:55 UTCJul 21, 03:25 UTC30m
2026-07-21 SKW5862 FAR → DEN Jul 21, 01:10 UTCJul 21, 02:00 UTC50m
2026-07-20 SKW5599 MKE → IAH Jul 20, 22:35 UTCJul 20, 23:45 UTC1h 10m
2026-07-20 SKW5599 MKE → IAH Jul 20, 22:32 UTCJul 20, 23:42 UTC1h 10m
2026-07-20 SKW5507 GSO → DEN Jul 20, 18:00 UTCJul 20, 19:55 UTC1h 55m
2026-07-20 SKW5507 GSO → DEN Jul 20, 18:04 UTCJul 20, 19:49 UTC1h 45m
2026-07-20 SKW481U YWG → DEN Jul 20, 13:55 UTCJul 20, 15:45 UTC1h 50m
2026-07-19 SKW5527 DEN → YWG Jul 19, 23:55 UTCJul 20, 01:40 UTC1h 45m
2026-07-19 SKW5515 GSP → DEN Jul 19, 19:50 UTCJul 19, 20:45 UTC55m
2026-07-19 SKW5515 GSP → DEN Jul 19, 19:59 UTCJul 19, 21:42 UTC1h 43m
2026-07-19 SKW5510 - Jul 19, 17:30 UTCJul 19, 18:55 UTC1h 25m
2026-07-19 SKW5803 - Jul 19, 14:00 UTCJul 19, 16:25 UTC2h 25m
2026-07-19 SKW5597 DEN → ASE Jul 19, 00:20 UTCJul 19, 02:23 UTC2h 3m
2026-07-18 SKW5452 RDD → SFO Jul 18, 21:29 UTCJul 18, 22:00 UTC31m
2026-07-18 SKW5452 - Jul 18, 21:15 UTCJul 18, 22:05 UTC50m
2026-07-18 SKW4701 DEN → MOT Jul 18, 18:05 UTCJul 18, 20:15 UTC2h 10m
2026-07-18 SKW4710 BIS → DEN Jul 18, 14:43 UTCJul 18, 15:43 UTC1h 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 N613UX page for operator, model, and routing details .

Mode-S A7FBBB frequently asked

What is Mode-S code A7FBBB?
A7FBBB is an ICAO 24-bit transponder address. Allocated to United States. Assigned to N613UX.
Where is Mode-S A7FBBB registered?
Mode-S code A7FBBB 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 A7FBBB broadcasting right now?
No active broadcast right now. Last signal was Jul 26, 22:45 UTC.
Hex, octal, and decimal Mode-S codes: what's the difference?
The same 24-bit identifier expressed in different bases: hex A7FBBB, octal 51775673, decimal 11,008,955.
What flights does A7FBBB operate?
Mode-S A7FBBB has broadcast 20 distinct callsigns, including SKW5491, SKW4713, SKW5536, SKW5469, SKW5834.