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sensors Mode-S transponder

AC0CB1

ICAO 24-bit transponder address · allocated to United States

Currently assigned to N876AS · BOMBARDIER Regional Jet CRJ-200 · operated by SKYWEST AIRLINES INC

Hex
AC0CB1
Octal
53006261
Decimal
11,275,441
Country
US
Tail
N876AS
Type
CRJ2
No current signal · last broadcast Jul 26, 22:15 UTC
Flights observed
612
Distinct callsigns
20
Country
US
Last broadcast
Jul 26, 22:15 UTC

Last known position

Most recent position reported by Mode-S AC0CB1.

Country allocation

The ICAO 24-bit address AC0CB1 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
SKW5128 - 9 2026-07-16
SKW5061 - 8 2026-07-10
SKW5887 - 6 2026-07-08
SKW5807 SkyWest Airlines 6 2026-07-18
SKW5118 - 6 2026-07-21
SKW5065 - 6 2026-07-21
SKW5041 - 6 2026-07-21
SKW4677 - 6 2026-06-30
SKW5949 - 5 2026-07-18
SKW5801 - 5 2026-07-18
SKW5466 - 5 2026-06-28
SKW5075 SkyWest Airlines 5 2026-05-10
SKW5067 SkyWest Airlines 5 2026-07-21
SKW5064 SkyWest Airlines 5 2026-06-11
SKW6076 - 4 2026-07-10
SKW6062 SkyWest Airlines 4 2026-06-12
SKW5953 - 4 2026-07-08
SKW5861 - 4 2026-06-30
SKW5640 SkyWest Airlines 4 2026-05-30
SKW5563 SkyWest Airlines 4 2026-07-18

Recent flights last 50

DateFlightRouteTakeoffLandingDuration
2026-07-26 SKW5907 ORD → MLI Jul 26, 21:50 UTCJul 26, 22:15 UTC25m
2026-07-25 SKW5198 IAH → MBS Jul 25, 16:15 UTCJul 25, 16:55 UTC40m
2026-07-25 SKW5198 IAH → MBS Jul 25, 16:14 UTCJul 25, 16:41 UTC27m
2026-07-24 SKW727R ORD → DAY Jul 24, 17:15 UTCJul 24, 18:00 UTC45m
2026-07-24 SKW5213 ORD → LEX Jul 24, 14:10 UTCJul 24, 15:10 UTC1h 0m
2026-07-24 SKW476T ORD → CAK Jul 24, 00:00 UTCJul 24, 01:15 UTC1h 15m
2026-07-23 SKW5017 DEC → ORD Jul 23, 19:30 UTCJul 23, 20:15 UTC45m
2026-07-23 SKW5017 DEC → ORD Jul 23, 19:22 UTCJul 23, 20:05 UTC43m
2026-07-23 SKW465C - Jul 23, 17:10 UTCJul 23, 17:50 UTC40m
2026-07-23 SKW5402 MKE → ORD Jul 23, 14:00 UTCJul 23, 14:30 UTC30m
2026-07-23 SKW5581 ORD → BNA Jul 23, 11:25 UTCJul 23, 11:45 UTC20m
2026-07-22 SKW4685 EUG → SFO Jul 22, 22:50 UTCJul 23, 00:10 UTC1h 20m
2026-07-22 SKW5437 PHX → SFO Jul 22, 18:15 UTCJul 22, 19:20 UTC1h 5m
2026-07-22 SKW5526 - Jul 22, 15:25 UTCJul 22, 16:55 UTC1h 30m
2026-07-22 SKW5375 ORD → MSN Jul 22, 12:50 UTCJul 22, 13:55 UTC1h 5m
2026-07-22 SKW5043 - Jul 22, 11:10 UTCJul 22, 11:30 UTC20m
2026-07-21 SKW5070 ORD → LAF Jul 21, 17:51 UTCJul 21, 17:54 UTC3m
2026-07-21 SKW5070 - Jul 21, 17:35 UTCJul 21, 18:05 UTC30m
2026-07-21 SKW5065 - Jul 21, 14:35 UTCJul 21, 16:15 UTC1h 40m
2026-07-21 SKW5065 LYH → ORD Jul 21, 14:45 UTCJul 21, 15:59 UTC1h 14m
2026-07-21 SKW5038 IAD → LYH Jul 21, 12:36 UTCJul 21, 13:08 UTC32m
2026-07-21 SKW5025 MGW → IAD Jul 21, 10:40 UTCJul 21, 11:20 UTC40m
2026-07-21 SKW5025 MGW → IAD Jul 21, 10:49 UTCJul 21, 11:15 UTC26m
2026-07-21 SKW5118 IAD → MGW Jul 21, 04:17 UTCJul 21, 04:36 UTC19m
2026-07-21 SKW5118 IAD → MGW Jul 21, 04:10 UTCJul 21, 04:45 UTC35m
2026-07-21 SKW5041 - Jul 21, 03:00 UTCJul 21, 03:35 UTC35m
2026-07-21 SKW5041 LYH → IAD Jul 21, 02:55 UTCJul 21, 03:29 UTC34m
2026-07-21 SKW5067 SGU → DEN Jul 21, 00:15 UTCJul 21, 01:40 UTC1h 25m
2026-07-20 SKW5134 MGW → ORD Jul 20, 00:25 UTCJul 20, 01:40 UTC1h 15m
2026-07-20 SKW5134 MGW → ORD Jul 20, 00:28 UTCJul 20, 01:26 UTC58m
2026-07-19 SKW5138 ORD → MGW Jul 19, 17:20 UTCJul 19, 18:20 UTC1h 0m
2026-07-19 SKW4670 - Jul 19, 12:30 UTCJul 19, 13:35 UTC1h 5m
2026-07-19 SKW6097 MDT → MKE Jul 19, 01:35 UTCJul 19, 03:10 UTC1h 35m
2026-07-18 SKW5563 BIH → SFO Jul 18, 21:15 UTCJul 18, 22:25 UTC1h 10m
2026-07-18 SKW5563 BIH → SFO Jul 18, 20:14 UTCJul 18, 22:27 UTC2h 13m
2026-07-18 SKW5807 PIA → ORD Jul 18, 15:50 UTCJul 18, 16:25 UTC35m
2026-07-18 SKW5949 ORD → PIA Jul 18, 14:19 UTCJul 18, 14:58 UTC39m
2026-07-18 SKW5949 - Jul 18, 14:30 UTCJul 18, 15:00 UTC30m
2026-07-18 SKW5801 - Jul 18, 11:25 UTCJul 18, 12:35 UTC1h 10m
2026-07-18 SKW4784 - Jul 18, 01:20 UTCJul 18, 02:35 UTC1h 15m
2026-07-18 SKW4784 ORD → CRW Jul 18, 01:33 UTCJul 18, 02:34 UTC1h 1m
2026-07-17 SKW5335 PNS → DEN Jul 17, 22:29 UTCJul 18, 00:04 UTC1h 35m
2026-07-17 SKW5282 - Jul 17, 17:44 UTCJul 17, 19:05 UTC1h 20m
2026-07-17 SKW5282 IAH → ICT Jul 17, 17:32 UTCJul 17, 19:02 UTC1h 30m
2026-07-17 SKW5530 - Jul 17, 00:04 UTCJul 17, 00:55 UTC50m
2026-07-16 SKW5368 - Jul 16, 21:50 UTCJul 16, 22:40 UTC50m
2026-07-16 SKW5128 - Jul 16, 18:50 UTCJul 16, 20:09 UTC1h 20m
2026-07-16 SKW5128 MGM → IAH Jul 16, 18:28 UTCJul 16, 20:08 UTC1h 40m
2026-07-16 SKW436K - Jul 16, 16:05 UTCJul 16, 17:25 UTC1h 20m
2026-07-16 SKW436K IAH → MGM Jul 16, 16:02 UTCJul 16, 17:30 UTC1h 28m

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 N876AS page for operator, model, and routing details .

Mode-S AC0CB1 frequently asked

What is Mode-S code AC0CB1?
AC0CB1 is an ICAO 24-bit transponder address. Allocated to United States. Assigned to N876AS.
Where is Mode-S AC0CB1 registered?
Mode-S code AC0CB1 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 AC0CB1 broadcasting right now?
No active broadcast right now. Last signal was Jul 26, 22:15 UTC.
Hex, octal, and decimal Mode-S codes: what's the difference?
The same 24-bit identifier expressed in different bases: hex AC0CB1, octal 53006261, decimal 11,275,441.
What flights does AC0CB1 operate?
Mode-S AC0CB1 has broadcast 20 distinct callsigns, including SKW5128, SKW5061, SKW5887, SKW5807, SKW5118.