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sensors Mode-S transponder

ABF6A4

ICAO 24-bit transponder address · allocated to United States

Currently assigned to N870DC · BOMBARDIER Regional Jet CRJ-700 · operated by SKYWEST AIRLINES INC

Hex
ABF6A4
Octal
52773244
Decimal
11,269,796
Country
US
Tail
N870DC
Type
CRJ7
Transponder active on ground
Flights observed
563
Distinct callsigns
20
Country
US
Last broadcast
53m ago

Last known position

Most recent position reported by Mode-S ABF6A4.

Country allocation

The ICAO 24-bit address ABF6A4 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
SKW4965 SkyWest Airlines 12 2026-06-16
SKW4996 - 11 2026-06-28
SKW4963 - 11 2026-07-12
SKW6256 - 10 2026-07-12
SKW6445 SkyWest Airlines 9 2026-05-04
SKW6284 SkyWest Airlines 9 2026-06-19
SKW6390 - 8 2026-06-25
SKW6194 - 8 2026-06-26
SKW4942 SkyWest Airlines 8 2026-05-29
SKW4894 - 8 2026-07-13
SKW6385 - 7 2026-06-26
SKW6373 SkyWest Airlines 7 2026-04-26
SKW6233 SkyWest Airlines 7 2026-06-09
SKW5006 - 6 2026-06-24
SKW4989 SkyWest Airlines 6 2026-05-29
SKW6517 - 5 2026-06-29
SKW6376 - 5 2026-07-09
SKW6348 - 5 2026-07-06
SKW6342 SkyWest Airlines 5 2026-06-15
SKW6310 - 5 2026-06-24

Recent flights last 50

DateFlightRouteTakeoffLandingDuration
2026-07-14 SKW4939 - Jul 14, 14:50 UTCJul 14, 16:10 UTC1h 20m
2026-07-14 SKW4892 PHX → MAF Jul 14, 05:15 UTCJul 14, 06:35 UTC1h 20m
2026-07-13 SKW6354 SMF → PHX Jul 13, 23:25 UTCJul 14, 01:10 UTC1h 45m
2026-07-13 SKW6354 PHX → SMF Jul 13, 20:45 UTCJul 13, 22:20 UTC1h 35m
2026-07-13 SKW4986 - Jul 13, 19:05 UTCJul 13, 19:35 UTC30m
2026-07-13 SKW4986 - Jul 13, 17:40 UTCJul 13, 18:00 UTC20m
2026-07-13 SKW4939 - Jul 13, 15:05 UTCJul 13, 16:30 UTC1h 25m
2026-07-13 SKW5013 - Jul 13, 13:25 UTCJul 13, 14:10 UTC45m
2026-07-13 SKW5013 DFW → MAF Jul 13, 12:51 UTCJul 13, 14:11 UTC1h 20m
2026-07-13 SKW4930 - Jul 13, 10:15 UTCJul 13, 11:00 UTC45m
2026-07-13 SKW4885 DFW → SJT Jul 13, 06:32 UTCJul 13, 06:57 UTC25m
2026-07-13 SKW4885 - Jul 13, 06:20 UTCJul 13, 06:50 UTC30m
2026-07-13 SKW4894 - Jul 13, 04:20 UTCJul 13, 05:01 UTC40m
2026-07-13 SKW4894 LBB → DFW Jul 13, 04:17 UTCJul 13, 05:00 UTC43m
2026-07-12 SKW4894 - Jul 12, 23:45 UTCJul 13, 00:50 UTC1h 5m
2026-07-12 SKW6256 - Jul 12, 21:05 UTCJul 12, 22:10 UTC1h 5m
2026-07-12 SKW6256 SWO → DFW Jul 12, 21:13 UTCJul 12, 21:58 UTC45m
2026-07-12 SKW6256 - Jul 12, 19:25 UTCJul 12, 20:05 UTC40m
2026-07-12 SKW4963 - Jul 12, 16:50 UTCJul 12, 18:15 UTC1h 25m
2026-07-12 SKW4963 - Jul 12, 14:30 UTCJul 12, 15:50 UTC1h 20m
2026-07-12 SKW6408 - Jul 12, 11:50 UTCJul 12, 13:10 UTC1h 20m
2026-07-12 SKW6408 COS → DFW Jul 12, 11:41 UTCJul 12, 13:06 UTC1h 25m
2026-07-12 SKW6267 DFW → COS Jul 12, 02:40 UTCJul 12, 04:10 UTC1h 30m
2026-07-12 SKW6267 DFW → COS Jul 12, 02:32 UTCJul 12, 04:08 UTC1h 36m
2026-07-12 SKW4936 - Jul 12, 00:35 UTCJul 12, 01:25 UTC50m
2026-07-12 SKW4936 BPT → DFW Jul 12, 00:30 UTCJul 12, 01:24 UTC54m
2026-07-11 SKW4936 - Jul 11, 22:50 UTCJul 11, 23:35 UTC45m
2026-07-11 SKW6511 SHV → DFW Jul 11, 19:57 UTCJul 11, 20:12 UTC15m
2026-07-11 SKW6511 - Jul 11, 19:20 UTCJul 11, 19:40 UTC20m
2026-07-11 SKW9911 - Jul 11, 16:40 UTCJul 11, 17:10 UTC30m
2026-07-11 SKW9911 DFW → SHV Jul 11, 16:48 UTCJul 11, 17:14 UTC26m
2026-07-11 SKW6203 OKC → DFW Jul 11, 13:35 UTCJul 11, 14:05 UTC30m
2026-07-11 SKW238P PHX → OKC Jul 11, 02:30 UTCJul 11, 04:25 UTC1h 55m
2026-07-10 SKW6459 - Jul 10, 23:30 UTCJul 11, 01:10 UTC1h 40m
2026-07-10 SKW6459 - Jul 10, 20:40 UTCJul 10, 22:25 UTC1h 45m
2026-07-10 SKW6369 - Jul 10, 19:05 UTCJul 10, 19:25 UTC20m
2026-07-10 SKW6369 TUS → PHX Jul 10, 18:54 UTCJul 10, 19:24 UTC30m
2026-07-10 SKW6369 PHX → TUS Jul 10, 17:25 UTCJul 10, 17:50 UTC25m
2026-07-10 SKW6375 - Jul 10, 13:00 UTCJul 10, 14:30 UTC1h 30m
2026-07-10 SKW6375 MRY → PHX Jul 10, 12:56 UTCJul 10, 14:25 UTC1h 29m
2026-07-10 SKW6374 PHX → MRY Jul 10, 04:02 UTCJul 10, 05:29 UTC1h 27m
2026-07-10 SKW6374 - Jul 10, 04:05 UTCJul 10, 05:35 UTC1h 30m
2026-07-10 SKW6298 - Jul 10, 01:10 UTCJul 10, 02:10 UTC1h 0m
2026-07-10 SKW6298 SAF → PHX Jul 10, 00:57 UTCJul 10, 02:08 UTC1h 11m
2026-07-09 SKW6513 - Jul 9, 22:15 UTCJul 9, 23:45 UTC1h 30m
2026-07-09 SKW6513 LAX → SAF Jul 9, 22:10 UTCJul 9, 23:50 UTC1h 40m
2026-07-09 SKW6376 - Jul 9, 20:00 UTCJul 9, 21:15 UTC1h 15m
2026-07-09 SKW6376 LAX → TUS Jul 9, 17:40 UTCJul 9, 18:55 UTC1h 15m
2026-07-09 SKW6290 PDX → LAX Jul 9, 14:05 UTCJul 9, 16:05 UTC2h 0m
2026-07-09 SKW6290 PDX → LAX Jul 9, 14:05 UTCJul 9, 15:59 UTC1h 54m

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 N870DC page for operator, model, and routing details .

Mode-S ABF6A4 frequently asked

What is Mode-S code ABF6A4?
ABF6A4 is an ICAO 24-bit transponder address. Allocated to United States. Assigned to N870DC.
Where is Mode-S ABF6A4 registered?
Mode-S code ABF6A4 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 ABF6A4 broadcasting right now?
Mode-S ABF6A4 is currently broadcasting from the ground.
Hex, octal, and decimal Mode-S codes: what's the difference?
The same 24-bit identifier expressed in different bases: hex ABF6A4, octal 52773244, decimal 11,269,796.
What flights does ABF6A4 operate?
Mode-S ABF6A4 has broadcast 20 distinct callsigns, including SKW4965, SKW4996, SKW4963, SKW6256, SKW6445.