Apparatus

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sensors Mode-S transponder

AC6A1F

ICAO 24-bit transponder address · allocated to United States

Currently assigned to N8997Q · BOEING 737 MAX 8 · operated by SOUTHWEST AIRLINES CO

Hex
AC6A1F
Octal
53065037
Decimal
11,299,359
Country
US
Tail
N8997Q
Type
B38M
No current signal · last broadcast Jul 26, 21:45 UTC
Flights observed
744
Distinct callsigns
20
Country
US
Last broadcast
Jul 26, 21:45 UTC

Last known position

Most recent position reported by Mode-S AC6A1F.

Country allocation

The ICAO 24-bit address AC6A1F 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
SWA1524 - 6 2026-06-21
SWA575 Southwest Airlines 4 2026-05-21
SWA4806 Southwest Airlines 4 2026-04-17
SWA3936 - 4 2026-06-25
SWA3900 Southwest Airlines 4 2026-05-09
SWA3701 Southwest Airlines 4 2026-04-28
SWA369 Southwest Airlines 4 2026-04-15
SWA3492 Southwest Airlines 4 2026-07-23
SWA3481 Southwest Airlines 4 2026-05-27
SWA336 Southwest Airlines 4 2026-04-16
SWA2293 - 4 2026-07-11
SWA2190 Southwest Airlines 4 2026-04-20
SWA1514 Southwest Airlines 4 2026-06-06
SWA706 Southwest Airlines 3 2026-07-24
SWA660 - 3 2026-06-27
SWA544 - 3 2026-06-26
SWA51 Southwest Airlines 3 2026-06-07
SWA4252 Southwest Airlines 3 2026-04-16
SWA3867 - 3 2026-04-13
SWA3723 Southwest Airlines 3 2026-06-28

Recent flights last 50

DateFlightRouteTakeoffLandingDuration
2026-07-26 SWA1784 BLI → OAK Jul 26, 21:05 UTCJul 26, 21:45 UTC40m
2026-07-26 SWA165 SAN → AUS Jul 26, 18:20 UTCJul 26, 19:55 UTC1h 35m
2026-07-26 SWA165 SAN → AUS Jul 26, 16:35 UTCJul 26, 17:20 UTC45m
2026-07-26 SWA1271 AUS → MCO Jul 26, 14:40 UTCJul 26, 15:20 UTC40m
2026-07-26 SWA1271 AUS → MCO Jul 26, 12:45 UTCJul 26, 13:25 UTC40m
2026-07-26 SWA4543 LAS → TUS Jul 26, 11:15 UTCJul 26, 11:50 UTC35m
2026-07-26 SWA4195 CVG → PHX Jul 26, 01:05 UTCJul 26, 01:55 UTC50m
2026-07-26 SWA4195 CVG → PHX Jul 26, 01:03 UTCJul 26, 01:50 UTC47m
2026-07-25 SWA2334 SAN → SFO Jul 25, 22:00 UTCJul 26, 00:15 UTC2h 15m
2026-07-25 SWA2334 SAN → SFO Jul 25, 21:55 UTCJul 26, 00:14 UTC2h 19m
2026-07-25 SWA4972 MDW → OAK Jul 25, 19:45 UTCJul 25, 20:45 UTC1h 0m
2026-07-25 SWA4972 MDW → OAK Jul 25, 19:21 UTCJul 25, 20:40 UTC1h 19m
2026-07-25 SWA163 PHX → SJC Jul 25, 17:00 UTCJul 25, 18:00 UTC1h 0m
2026-07-25 SWA163 PHX → SJC Jul 25, 14:05 UTCJul 25, 15:55 UTC1h 50m
2026-07-25 SWA163 PHX → SJC Jul 25, 11:10 UTCJul 25, 12:50 UTC1h 40m
2026-07-25 SWA858 DEN → FLL Jul 25, 04:00 UTCJul 25, 04:45 UTC45m
2026-07-25 SWA3425 SJC → LAX Jul 25, 02:20 UTCJul 25, 03:05 UTC45m
2026-07-24 SWA706 BHM → BWI Jul 24, 21:40 UTCJul 25, 01:35 UTC3h 55m
2026-07-24 SWA706 BHM → BWI Jul 24, 21:35 UTCJul 25, 01:25 UTC3h 50m
2026-07-24 SWA706 BHM → BWI Jul 24, 18:30 UTCJul 24, 19:55 UTC1h 25m
2026-07-24 SWA4264 SJC → PDX Jul 24, 13:25 UTCJul 24, 16:55 UTC3h 30m
2026-07-24 SWA370 PHX → BUR Jul 24, 09:45 UTCJul 24, 11:55 UTC2h 10m
2026-07-24 SWA2248 ONT → MDW Jul 24, 03:00 UTCJul 24, 06:10 UTC3h 10m
2026-07-23 SWA4240 SJC → SAN Jul 23, 23:25 UTCJul 24, 01:50 UTC2h 25m
2026-07-23 SWA4625 BUR → SJC Jul 23, 20:35 UTCJul 23, 21:50 UTC1h 15m
2026-07-23 SWA155 DAL → MCI Jul 23, 17:25 UTCJul 23, 19:20 UTC1h 55m
2026-07-23 SWA155 DAL → MCI Jul 23, 15:25 UTCJul 23, 16:15 UTC50m
2026-07-23 SWA1280 BOS → BWI Jul 23, 11:30 UTCJul 23, 13:55 UTC2h 25m
2026-07-23 SWA3492 OAK → LGB Jul 23, 02:40 UTCJul 23, 05:15 UTC2h 35m
2026-07-23 SWA3492 OAK → LGB Jul 23, 02:37 UTCJul 23, 05:11 UTC2h 34m
2026-07-22 SWA3981 SEA → SAN Jul 22, 23:05 UTCJul 23, 01:40 UTC2h 35m
2026-07-22 SWA3981 STL → SEA Jul 22, 17:25 UTCJul 22, 21:10 UTC3h 45m
2026-07-22 SWA2901 RDU → TPA Jul 22, 15:15 UTCJul 22, 16:05 UTC50m
2026-07-22 SWA3178 GEG → SJC Jul 22, 11:25 UTCJul 22, 11:50 UTC25m
2026-07-22 SWA2377 SJC → SNA Jul 22, 02:55 UTCJul 22, 05:25 UTC2h 30m
2026-07-22 SWA2377 SJC → SNA Jul 22, 02:51 UTCJul 22, 05:50 UTC2h 59m
2026-07-21 SWA1323 STL → SRQ Jul 21, 23:35 UTCJul 22, 01:55 UTC2h 20m
2026-07-21 SWA1323 STL → SRQ Jul 21, 20:20 UTCJul 21, 22:30 UTC2h 10m
2026-07-21 SWA3953 HAV → TPA Jul 21, 17:25 UTCJul 21, 18:15 UTC50m
2026-07-21 SWA3953 HAV → TPA Jul 21, 17:08 UTCJul 21, 18:06 UTC58m
2026-07-21 SWA3952 TPA → HAV Jul 21, 14:15 UTCJul 21, 14:55 UTC40m
2026-07-21 SWA3952 TPA → HAV Jul 21, 14:10 UTCJul 21, 15:11 UTC1h 1m
2026-07-21 SWA3985 MDW → BNA Jul 21, 10:15 UTCJul 21, 12:10 UTC1h 55m
2026-07-21 SWA1756 PHX → ELP Jul 21, 02:10 UTCJul 21, 03:45 UTC1h 35m
2026-07-20 SWA2975 LAX → SMF Jul 20, 22:35 UTCJul 21, 00:20 UTC1h 44m
2026-07-20 SWA2975 LAX → SMF Jul 20, 20:15 UTCJul 20, 21:15 UTC1h 0m
2026-07-20 SWA3746 DCA → MDW Jul 20, 17:35 UTCJul 20, 19:00 UTC1h 25m
2026-07-20 SWA3746 DCA → MDW Jul 20, 17:33 UTCJul 20, 18:53 UTC1h 21m
2026-07-20 SWA3827 PVD → FLL Jul 20, 15:15 UTCJul 20, 16:30 UTC1h 15m
2026-07-20 SWA3165 STL → LGA Jul 20, 13:15 UTCJul 20, 14:10 UTC55m

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 N8997Q page for operator, model, and routing details .

Mode-S AC6A1F frequently asked

What is Mode-S code AC6A1F?
AC6A1F is an ICAO 24-bit transponder address. Allocated to United States. Assigned to N8997Q.
Where is Mode-S AC6A1F registered?
Mode-S code AC6A1F 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 AC6A1F 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 AC6A1F, octal 53065037, decimal 11,299,359.
What flights does AC6A1F operate?
Mode-S AC6A1F has broadcast 20 distinct callsigns, including SWA1524, SWA575, SWA4806, SWA3936, SWA3900.