Apparatus

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sensors Mode-S transponder

AC6227

ICAO 24-bit transponder address · allocated to United States

Currently assigned to N8973S · BOEING 737 MAX 8 · operated by SOUTHWEST AIRLINES CO

Hex
AC6227
Octal
53061047
Decimal
11,297,319
Country
US
Tail
N8973S
Type
B38M
No current signal · last broadcast 1h ago
Flights observed
700
Distinct callsigns
20
Country
US
Last broadcast
1h ago

Last known position

Most recent position reported by Mode-S AC6227.

Country allocation

The ICAO 24-bit address AC6227 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
SWA805 - 4 2026-04-13
SWA513 - 4 2026-04-13
SWA512 Southwest Airlines 4 2026-04-16
SWA4684 Southwest Airlines 4 2026-06-23
SWA4478 Southwest Airlines 4 2026-06-10
SWA3682 Southwest Airlines 4 2026-04-30
SWA3337 Southwest Airlines 4 2026-06-11
SWA3196 - 4 2026-06-13
SWA1587 - 4 2026-06-15
SWA1582 Southwest Airlines 4 2026-04-17
SWA1343 Southwest Airlines 4 2026-04-22
SWA1049 Southwest Airlines 4 2026-06-09
SWA875 Southwest Airlines 3 2026-06-10
SWA548 Southwest Airlines 3 2026-05-30
SWA544 Southwest Airlines 3 2026-05-16
SWA499 - 3 2026-07-02
SWA472 Southwest Airlines 3 2026-04-14
SWA4650 Southwest Airlines 3 2026-04-18
SWA4594 Southwest Airlines 3 2026-06-03
SWA4573 Southwest Airlines 3 2026-04-21

Recent flights last 50

DateFlightRouteTakeoffLandingDuration
2026-07-14 SWA426 - Jul 14, 18:00 UTCJul 14, 19:45 UTC1h 45m
2026-07-14 SWA1377 DAL → PDX Jul 14, 13:25 UTCJul 14, 16:40 UTC3h 15m
2026-07-14 SWA2661 MDW → DAL Jul 14, 10:15 UTCJul 14, 11:55 UTC1h 40m
2026-07-14 SWA2044 - Jul 14, 03:40 UTCJul 14, 05:40 UTC2h 0m
2026-07-14 SWA3573 - Jul 14, 01:45 UTCJul 14, 02:20 UTC35m
2026-07-13 SWA4834 MCO → SAT Jul 13, 22:35 UTCJul 14, 00:56 UTC2h 21m
2026-07-13 SWA4834 - Jul 13, 22:35 UTCJul 14, 00:55 UTC2h 20m
2026-07-13 SWA1817 - Jul 13, 15:20 UTCJul 13, 19:20 UTC4h 0m
2026-07-13 SWA2954 - Jul 13, 10:40 UTCJul 13, 13:35 UTC2h 55m
2026-07-13 SWA2954 MKE → PHX Jul 13, 10:39 UTCJul 13, 13:36 UTC2h 58m
2026-07-13 SWA265 STL → MKE Jul 13, 03:22 UTCJul 13, 04:14 UTC52m
2026-07-13 SWA265 STL → MKE Jul 13, 03:25 UTCJul 13, 04:15 UTC50m
2026-07-12 SWA2888 - Jul 12, 23:55 UTCJul 13, 02:25 UTC2h 30m
2026-07-12 SWA2888 MIA → STL Jul 12, 23:55 UTCJul 13, 02:09 UTC2h 14m
2026-07-12 SWA3959 DEN → MIA Jul 12, 18:59 UTCJul 12, 22:21 UTC3h 22m
2026-07-12 SWA3959 - Jul 12, 19:01 UTCJul 12, 22:25 UTC3h 25m
2026-07-12 SWA3042 OAK → DEN Jul 12, 15:35 UTCJul 12, 17:35 UTC2h 0m
2026-07-12 SWA4838 PHX → OAK Jul 12, 12:40 UTCJul 12, 14:10 UTC1h 30m
2026-07-12 SWA4838 PHX → OAK Jul 12, 12:41 UTCJul 12, 14:03 UTC1h 23m
2026-07-12 SWA643 - Jul 12, 04:40 UTCJul 12, 07:40 UTC3h 0m
2026-07-11 SWA924 LAS → BNA Jul 11, 23:55 UTCJul 12, 03:05 UTC3h 10m
2026-07-11 SWA924 LAS → BNA Jul 11, 23:55 UTCJul 12, 03:01 UTC3h 6m
2026-07-11 SWA1571 - Jul 11, 21:45 UTCJul 11, 22:25 UTC40m
2026-07-11 SWA3875 - Jul 11, 17:35 UTCJul 11, 20:20 UTC2h 45m
2026-07-11 SWA3875 MCI → LAX Jul 11, 17:34 UTCJul 11, 20:21 UTC2h 48m
2026-07-11 SWA3875 - Jul 11, 13:50 UTCJul 11, 16:25 UTC2h 35m
2026-07-11 SWA3941 - Jul 11, 10:20 UTCJul 11, 11:45 UTC1h 25m
2026-07-11 SWA3941 STL → FLL Jul 11, 10:16 UTCJul 11, 12:35 UTC2h 19m
2026-07-11 SWA3317 DEN → STL Jul 11, 04:30 UTCJul 11, 06:10 UTC1h 40m
2026-07-11 SWA3063 MSP → DEN Jul 11, 01:10 UTCJul 11, 02:40 UTC1h 30m
2026-07-10 SWA1639 - Jul 10, 22:05 UTCJul 10, 23:35 UTC1h 30m
2026-07-10 SWA1639 DEN → MSP Jul 10, 22:03 UTCJul 10, 23:32 UTC1h 29m
2026-07-10 SWA2226 - Jul 10, 19:30 UTCJul 10, 21:05 UTC1h 36m
2026-07-10 SWA2794 - Jul 10, 14:40 UTCJul 10, 18:00 UTC3h 20m
2026-07-10 SWA1442 DCA → MDW Jul 10, 12:10 UTCJul 10, 13:40 UTC1h 30m
2026-07-10 SWA3908 STL → DCA Jul 10, 01:40 UTCJul 10, 03:15 UTC1h 35m
2026-07-10 SWA3908 STL → DCA Jul 10, 01:35 UTCJul 10, 03:09 UTC1h 35m
2026-07-09 SWA4661 - Jul 9, 22:55 UTCJul 9, 23:50 UTC55m
2026-07-09 SWA4974 - Jul 9, 20:55 UTCJul 9, 21:55 UTC1h 0m
2026-07-09 SWA3290 - Jul 9, 17:45 UTCJul 9, 19:50 UTC2h 5m
2026-07-09 SWA3290 - Jul 9, 15:50 UTCJul 9, 16:40 UTC50m
2026-07-09 SWA3707 - Jul 9, 13:40 UTCJul 9, 14:40 UTC1h 0m
2026-07-09 SWA3707 SJC → SNA Jul 9, 13:39 UTCJul 9, 14:35 UTC56m
2026-07-09 SWA4936 - Jul 9, 04:15 UTCJul 9, 05:10 UTC55m
2026-07-09 SWA1748 DEN → SNA Jul 9, 01:24 UTCJul 9, 03:17 UTC1h 53m
2026-07-09 SWA1748 - Jul 9, 01:25 UTCJul 9, 03:20 UTC1h 55m
2026-07-08 SWA164 - Jul 8, 19:55 UTCJul 8, 23:35 UTC3h 40m
2026-07-08 SWA164 - Jul 8, 17:40 UTCJul 8, 18:40 UTC1h 0m
2026-07-08 SWA164 MCO → BWI Jul 8, 14:35 UTCJul 8, 16:25 UTC1h 50m
2026-07-08 SWA565 SJC → RNO Jul 8, 12:05 UTCJul 8, 13:25 UTC1h 20m

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 N8973S page for operator, model, and routing details .

Mode-S AC6227 frequently asked

What is Mode-S code AC6227?
AC6227 is an ICAO 24-bit transponder address. Allocated to United States. Assigned to N8973S.
Where is Mode-S AC6227 registered?
Mode-S code AC6227 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 AC6227 broadcasting right now?
No active broadcast right now. Last signal was 1h ago.
Hex, octal, and decimal Mode-S codes: what's the difference?
The same 24-bit identifier expressed in different bases: hex AC6227, octal 53061047, decimal 11,297,319.
What flights does AC6227 operate?
Mode-S AC6227 has broadcast 20 distinct callsigns, including SWA805, SWA513, SWA512, SWA4684, SWA4478.