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sensors Mode-S transponder

AC6668

ICAO 24-bit transponder address · allocated to United States

Currently assigned to N8987Q · BOEING 737 MAX 8 · operated by SOUTHWEST AIRLINES CO

Hex
AC6668
Octal
53063150
Decimal
11,298,408
Country
US
Tail
N8987Q
Type
B38M
Broadcasting now · callsign SWA1142 · 32,775 ft
Flights observed
680
Distinct callsigns
20
Country
US
Last broadcast
1h ago

Current position

AC6668 is currently broadcasting. Map zoomed to live position.

Country allocation

The ICAO 24-bit address AC6668 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
SWA642 Southwest Airlines 5 2026-06-05
SWA1564 - 5 2026-06-24
SWA888 Southwest Airlines 4 2026-05-23
SWA752 Southwest Airlines 4 2026-04-29
SWA55 - 4 2026-06-21
SWA2013 - 4 2026-06-15
SWA1794 - 4 2026-04-13
SWA1048 - 4 2026-07-14
SWA927 - 3 2026-06-25
SWA873 Southwest Airlines 3 2026-04-21
SWA784 Southwest Airlines 3 2026-04-29
SWA4517 Southwest Airlines 3 2026-05-07
SWA4478 Southwest Airlines 3 2026-05-07
SWA4445 - 3 2026-07-09
SWA4206 - 3 2026-07-12
SWA4053 - 3 2026-07-09
SWA4035 Southwest Airlines 3 2026-06-26
SWA3804 Southwest Airlines 3 2026-05-15
SWA3753 Southwest Airlines 3 2026-05-24
SWA3750 Southwest Airlines 3 2026-04-30

Recent flights last 50

DateFlightRouteTakeoffLandingDuration
2026-07-14 SWA3263 - Jul 14, 18:20 UTCJul 14, 19:45 UTC1h 25m
2026-07-14 SWA3263 - Jul 14, 16:20 UTCJul 14, 17:15 UTC55m
2026-07-14 SWA3489 SJC → SAN Jul 14, 13:50 UTCJul 14, 14:55 UTC1h 5m
2026-07-14 SWA3337 - Jul 14, 04:50 UTCJul 14, 06:20 UTC1h 30m
2026-07-14 SWA1048 - Jul 14, 02:55 UTCJul 14, 03:15 UTC20m
2026-07-14 SWA1048 PDX → PHX Jul 14, 00:20 UTCJul 14, 03:15 UTC2h 55m
2026-07-14 SWA1048 PDX → PHX Jul 14, 00:16 UTCJul 14, 02:36 UTC2h 20m
2026-07-13 SWA1048 BWI → PDX Jul 13, 18:00 UTCJul 13, 22:50 UTC4h 50m
2026-07-13 SWA4252 AUS → BWI Jul 13, 14:00 UTCJul 13, 16:50 UTC2h 50m
2026-07-13 SWA2594 MCO → AUS Jul 13, 10:50 UTCJul 13, 13:00 UTC2h 10m
2026-07-13 SWA1635 - Jul 13, 03:01 UTCJul 13, 03:45 UTC45m
2026-07-13 SWA1635 - Jul 13, 01:15 UTCJul 13, 01:30 UTC15m
2026-07-12 SWA1656 - Jul 12, 23:40 UTCJul 12, 23:50 UTC10m
2026-07-12 SWA1656 MCO → SJU Jul 12, 21:20 UTCJul 12, 23:46 UTC2h 26m
2026-07-12 SWA1656 - Jul 12, 21:25 UTCJul 12, 21:55 UTC30m
2026-07-12 SWA4206 - Jul 12, 17:10 UTCJul 12, 19:10 UTC2h 0m
2026-07-12 SWA4206 TYS → MCO Jul 12, 17:05 UTCJul 12, 19:10 UTC2h 6m
2026-07-12 SWA4206 - Jul 12, 15:30 UTCJul 12, 15:55 UTC25m
2026-07-12 SWA1954 - Jul 12, 12:25 UTCJul 12, 14:10 UTC1h 45m
2026-07-12 SWA1861 - Jul 12, 09:15 UTCJul 12, 11:20 UTC2h 5m
2026-07-12 SWA3585 - Jul 12, 00:45 UTCJul 12, 02:55 UTC2h 10m
2026-07-11 SWA1828 - Jul 11, 22:40 UTCJul 11, 23:45 UTC1h 5m
2026-07-11 SWA1828 MYR → PIT Jul 11, 22:35 UTCJul 11, 23:44 UTC1h 9m
2026-07-11 SWA1828 - Jul 11, 18:30 UTCJul 11, 21:15 UTC2h 45m
2026-07-11 SWA2548 - Jul 11, 15:55 UTCJul 11, 17:15 UTC1h 20m
2026-07-11 SWA2563 - Jul 11, 12:30 UTCJul 11, 14:35 UTC2h 5m
2026-07-11 SWA3070 OAK → PHX Jul 11, 04:30 UTCJul 11, 06:03 UTC1h 34m
2026-07-11 SWA3070 OAK → PHX Jul 11, 04:30 UTCJul 11, 06:05 UTC1h 35m
2026-07-11 SWA3853 - Jul 11, 02:30 UTCJul 11, 03:30 UTC1h 0m
2026-07-11 SWA3853 SNA → OAK Jul 11, 02:26 UTCJul 11, 03:23 UTC57m
2026-07-10 SWA901 - Jul 10, 22:45 UTCJul 11, 01:15 UTC2h 30m
2026-07-10 SWA867 BWI → AUS Jul 10, 18:15 UTCJul 10, 21:20 UTC3h 5m
2026-07-10 SWA2383 - Jul 10, 12:35 UTCJul 10, 17:00 UTC4h 25m
2026-07-10 SWA2383 LAX → BWI Jul 10, 12:30 UTCJul 10, 16:58 UTC4h 28m
2026-07-10 SWA2269 STL → LAX Jul 10, 04:02 UTCJul 10, 07:28 UTC3h 27m
2026-07-10 SWA2269 - Jul 10, 04:05 UTCJul 10, 07:35 UTC3h 30m
2026-07-10 SWA754 BOS → STL Jul 10, 00:15 UTCJul 10, 02:50 UTC2h 35m
2026-07-10 SWA754 BOS → STL Jul 10, 00:13 UTCJul 10, 02:56 UTC2h 43m
2026-07-09 SWA4997 - Jul 9, 20:35 UTCJul 9, 23:00 UTC2h 25m
2026-07-09 SWA4997 MCI → BOS Jul 9, 20:30 UTCJul 9, 22:56 UTC2h 27m
2026-07-09 SWA4327 - Jul 9, 17:15 UTCJul 9, 18:20 UTC1h 5m
2026-07-09 SWA4327 DAL → MCI Jul 9, 17:10 UTCJul 9, 18:18 UTC1h 8m
2026-07-09 SWA4053 - Jul 9, 15:25 UTCJul 9, 16:05 UTC40m
2026-07-09 SWA4445 DAL → TUL Jul 9, 13:40 UTCJul 9, 14:20 UTC40m
2026-07-09 SWA4188 - Jul 9, 11:20 UTCJul 9, 12:30 UTC1h 10m
2026-07-09 SWA4188 MCI → DAL Jul 9, 11:19 UTCJul 9, 12:33 UTC1h 14m
2026-07-09 SWA1589 DEN → MCI Jul 9, 03:01 UTCJul 9, 04:25 UTC1h 24m
2026-07-09 SWA1589 - Jul 9, 03:05 UTCJul 9, 04:25 UTC1h 20m
2026-07-09 SWA2687 ONT → DEN Jul 9, 00:00 UTCJul 9, 01:45 UTC1h 45m
2026-07-09 SWA2687 ONT → DEN Jul 9, 00:00 UTCJul 9, 01:45 UTC1h 45m

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 N8987Q page for operator, model, and routing details .

Mode-S AC6668 frequently asked

What is Mode-S code AC6668?
AC6668 is an ICAO 24-bit transponder address. Allocated to United States. Assigned to N8987Q.
Where is Mode-S AC6668 registered?
Mode-S code AC6668 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 AC6668 broadcasting right now?
Yes. Mode-S AC6668 is currently airborne.
Hex, octal, and decimal Mode-S codes: what's the difference?
The same 24-bit identifier expressed in different bases: hex AC6668, octal 53063150, decimal 11,298,408.
What flights does AC6668 operate?
Mode-S AC6668 has broadcast 20 distinct callsigns, including SWA642, SWA1564, SWA888, SWA752, SWA55.