Apparatus

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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
No current signal · last broadcast Jul 26, 22:25 UTC
Flights observed
644
Distinct callsigns
20
Country
US
Last broadcast
Jul 26, 22:25 UTC

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
SKW4942 - 9 2026-07-16
SKW6390 - 8 2026-06-25
SKW6194 - 8 2026-06-26
SKW4894 - 8 2026-07-13
SKW6385 - 7 2026-06-26
SKW6373 SkyWest Airlines 7 2026-04-26
SKW6233 SkyWest Airlines 7 2026-06-09
SKW9912 SkyWest Airlines 6 2026-07-24
SKW6391 SkyWest Airlines 6 2026-07-24
SKW6232 SkyWest Airlines 6 2026-07-25
SKW5006 - 6 2026-06-24
SKW4989 SkyWest Airlines 6 2026-05-29
SKW6517 - 5 2026-06-29
SKW6403 SkyWest Airlines 5 2026-07-22

Recent flights last 50

DateFlightRouteTakeoffLandingDuration
2026-07-26 SKW4833 LWB → ORD Jul 26, 21:10 UTCJul 26, 22:25 UTC1h 15m
2026-07-26 SKW4830 CLT → LWB Jul 26, 19:50 UTCJul 26, 20:20 UTC30m
2026-07-26 SKW6228 MRY → PHX Jul 26, 14:35 UTCJul 26, 16:05 UTC1h 30m
2026-07-26 SKW6228 MRY → PHX Jul 26, 12:05 UTCJul 26, 13:25 UTC1h 20m
2026-07-26 SKW4827 SHD → CLT Jul 26, 09:35 UTCJul 26, 10:20 UTC45m
2026-07-26 SKW4832 ORD → SHD Jul 26, 02:20 UTCJul 26, 03:35 UTC1h 15m
2026-07-25 SKW6291 SJC → LAX Jul 25, 23:55 UTCJul 26, 00:45 UTC50m
2026-07-25 SKW6291 SJC → LAX Jul 25, 22:00 UTCJul 25, 22:50 UTC50m
2026-07-25 SKW6379 ORD → OKC Jul 25, 18:45 UTCJul 25, 19:25 UTC40m
2026-07-25 SKW6379 ORD → OKC Jul 25, 18:43 UTCJul 25, 19:14 UTC31m
2026-07-25 SKW6379 ORD → OKC Jul 25, 17:10 UTCJul 25, 17:40 UTC30m
2026-07-25 SKW6232 SMF → PHX Jul 25, 15:50 UTCJul 25, 15:55 UTC5m
2026-07-25 SKW6232 SMF → PHX Jul 25, 15:25 UTCJul 25, 15:55 UTC30m
2026-07-25 SKW6232 SMF → PHX Jul 25, 15:12 UTCJul 25, 15:34 UTC22m
2026-07-25 SKW6232 SMF → PHX Jul 25, 13:40 UTCJul 25, 14:10 UTC30m
2026-07-25 SKW6465 DTW → ORD Jul 25, 11:00 UTCJul 25, 11:55 UTC55m
2026-07-25 SKW4931 LAX → PHX Jul 25, 00:10 UTCJul 25, 00:55 UTC45m
2026-07-25 SKW4931 LAX → PHX Jul 25, 00:07 UTCJul 25, 00:52 UTC45m
2026-07-24 SKW4987 ORD → CVG Jul 24, 21:55 UTCJul 24, 22:35 UTC40m
2026-07-24 SKW4987 ORD → CVG Jul 24, 20:20 UTCJul 24, 21:00 UTC40m
2026-07-24 SKW6391 TUS → LAX Jul 24, 18:30 UTCJul 24, 19:00 UTC30m
2026-07-24 SKW6391 TUS → LAX Jul 24, 18:28 UTCJul 24, 18:47 UTC19m
2026-07-24 SKW9912 BPT → IAH Jul 24, 17:05 UTCJul 24, 17:35 UTC30m
2026-07-24 SKW9912 BPT → IAH Jul 24, 16:50 UTCJul 24, 17:30 UTC40m
2026-07-24 SKW4953 DFW → SWO Jul 24, 14:40 UTCJul 24, 15:35 UTC55m
2026-07-24 SKW4953 DFW → SWO Jul 24, 12:55 UTCJul 24, 13:45 UTC50m
2026-07-24 SKW4976 ORD → DTW Jul 24, 09:45 UTCJul 24, 11:00 UTC1h 15m
2026-07-24 SKW4976 ORD → DTW Jul 24, 09:41 UTCJul 24, 11:01 UTC1h 20m
2026-07-24 SKW6498 ORD → LEX Jul 24, 03:30 UTCJul 24, 04:20 UTC50m
2026-07-24 SKW6380 OKC → ORD Jul 24, 00:10 UTCJul 24, 01:00 UTC50m
2026-07-23 SKW6380 OKC → ORD Jul 23, 22:45 UTCJul 23, 23:20 UTC35m
2026-07-23 SKW4955 ORD → MKE Jul 23, 18:55 UTCJul 23, 20:55 UTC2h 0m
2026-07-23 SKW4955 ORD → MKE Jul 23, 18:50 UTCJul 23, 20:53 UTC2h 3m
2026-07-23 SKW4955 ORD → MKE Jul 23, 15:30 UTCJul 23, 17:45 UTC2h 15m
2026-07-23 SKW6216 GUC → DFW Jul 23, 11:25 UTCJul 23, 12:45 UTC1h 20m
2026-07-23 SKW5001 SPI → ORD Jul 23, 00:25 UTCJul 23, 01:25 UTC1h 0m
2026-07-22 SKW6411 SFO → LAX Jul 22, 19:25 UTCJul 22, 21:25 UTC2h 0m
2026-07-22 SKW6411 SFO → LAX Jul 22, 18:57 UTCJul 22, 21:24 UTC2h 27m
2026-07-22 SKW6219 LAX → DEN Jul 22, 15:30 UTCJul 22, 17:35 UTC2h 5m
2026-07-22 SKW6219 LAX → DEN Jul 22, 15:32 UTCJul 22, 17:47 UTC2h 15m
2026-07-22 SKW6403 SAF → DFW Jul 22, 12:40 UTCJul 22, 13:50 UTC1h 10m
2026-07-22 SKW6403 SAF → DFW Jul 22, 12:24 UTCJul 22, 13:47 UTC1h 23m
2026-07-22 SKW6436 DFW → SAF Jul 22, 02:25 UTCJul 22, 03:35 UTC1h 10m
2026-07-22 SKW6410 DFW → HOU Jul 22, 00:20 UTCJul 22, 01:05 UTC45m
2026-07-21 SKW6205 - Jul 21, 21:35 UTCJul 21, 23:20 UTC1h 45m
2026-07-21 SKW6427 ORD → ASE Jul 21, 17:20 UTCJul 21, 19:25 UTC2h 5m
2026-07-21 SKW6363 DFW → BRO Jul 21, 14:50 UTCJul 21, 15:50 UTC1h 0m
2026-07-21 SKW6363 DFW → BRO Jul 21, 14:42 UTCJul 21, 15:30 UTC48m
2026-07-21 SKW6363 DFW → BRO Jul 21, 13:00 UTCJul 21, 13:50 UTC50m
2026-07-19 SKW9909 - Jul 19, 15:55 UTCJul 19, 17:55 UTC2h 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 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?
No active broadcast right now. Last signal was Jul 26, 22:25 UTC.
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.