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sensors Mode-S transponder

AC4C44

ICAO 24-bit transponder address · allocated to United States

Currently assigned to N8916Q · BOEING 737 MAX 8 · operated by SOUTHWEST AIRLINES CO

Hex
AC4C44
Octal
53046104
Decimal
11,291,716
Country
US
Tail
N8916Q
Type
B38M
Broadcasting now · callsign SWA696 · 18,050 ft
Flights observed
652
Distinct callsigns
20
Country
US
Last broadcast
1h ago

Current position

AC4C44 is currently broadcasting. Map zoomed to live position.

Country allocation

The ICAO 24-bit address AC4C44 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
SWA163 - 5 2026-06-20
SWA981 - 4 2026-07-07
SWA942 Southwest Airlines 4 2026-06-06
SWA776 Southwest Airlines 4 2026-04-17
SWA560 Southwest Airlines 4 2026-06-11
SWA4806 Southwest Airlines 4 2026-05-21
SWA3844 - 4 2026-06-23
SWA3521 Southwest Airlines 4 2026-05-04
SWA2839 Southwest Airlines 4 2026-04-26
SWA1850 Southwest Airlines 4 2026-06-02
SWA1322 - 4 2026-07-07
SWA947 Southwest Airlines 3 2026-05-15
SWA706 Southwest Airlines 3 2026-06-12
SWA586 - 3 2026-06-23
SWA513 Southwest Airlines 3 2026-05-12
SWA4972 Southwest Airlines 3 2026-06-20
SWA488 - 3 2026-06-29
SWA4795 Southwest Airlines 3 2026-06-25
SWA4195 - 3 2026-06-21
SWA3795 Southwest Airlines 3 2026-04-20

Recent flights last 50

DateFlightRouteTakeoffLandingDuration
2026-07-14 SWA3217 - Jul 14, 00:45 UTCJul 14, 02:20 UTC1h 35m
2026-07-13 SWA3286 DEN → PHL Jul 13, 20:29 UTCJul 13, 23:41 UTC3h 12m
2026-07-13 SWA3286 DEN → PHL Jul 13, 20:30 UTCJul 13, 23:50 UTC3h 20m
2026-07-13 SWA3399 AUS → DEN Jul 13, 17:25 UTCJul 13, 19:15 UTC1h 50m
2026-07-13 SWA3399 AUS → DEN Jul 13, 17:26 UTCJul 13, 19:13 UTC1h 48m
2026-07-13 SWA2363 SJC → AUS Jul 13, 13:20 UTCJul 13, 16:20 UTC3h 0m
2026-07-13 SWA2659 - Jul 13, 04:05 UTCJul 13, 07:40 UTC3h 35m
2026-07-13 SWA2659 MDW → SJC Jul 13, 04:01 UTCJul 13, 07:35 UTC3h 34m
2026-07-13 SWA2659 - Jul 13, 01:01 UTCJul 13, 02:45 UTC1h 45m
2026-07-12 SWA2047 - Jul 12, 22:35 UTCJul 12, 23:50 UTC1h 15m
2026-07-12 SWA2047 BNA → CHS Jul 12, 22:34 UTCJul 12, 23:46 UTC1h 12m
2026-07-12 SWA3245 - Jul 12, 19:35 UTCJul 12, 21:10 UTC1h 35m
2026-07-12 SWA1960 - Jul 12, 15:40 UTCJul 12, 18:25 UTC2h 45m
2026-07-12 SWA1960 HOU → BWI Jul 12, 15:34 UTCJul 12, 18:22 UTC2h 48m
2026-07-12 SWA3246 - Jul 12, 11:45 UTCJul 12, 14:30 UTC2h 45m
2026-07-12 SWA2385 - Jul 12, 05:10 UTCJul 12, 09:40 UTC4h 30m
2026-07-12 SWA3948 - Jul 12, 01:25 UTCJul 12, 02:55 UTC1h 30m
2026-07-11 SWA2012 LAS → SLC Jul 11, 23:20 UTCJul 12, 00:10 UTC50m
2026-07-11 SWA2012 - Jul 11, 20:40 UTCJul 11, 22:20 UTC1h 40m
2026-07-11 SWA2012 - Jul 11, 18:30 UTCJul 11, 19:35 UTC1h 5m
2026-07-11 SWA2483 LGB → HOU Jul 11, 14:08 UTCJul 11, 17:15 UTC3h 7m
2026-07-11 SWA2483 - Jul 11, 14:10 UTCJul 11, 17:05 UTC2h 55m
2026-07-11 SWA4983 SLC → LGB Jul 11, 02:55 UTCJul 11, 04:20 UTC1h 25m
2026-07-11 SWA4810 SAN → SLC Jul 11, 00:24 UTCJul 11, 01:48 UTC1h 24m
2026-07-11 SWA4810 - Jul 11, 00:25 UTCJul 11, 01:50 UTC1h 25m
2026-07-10 SWA4486 - Jul 10, 19:00 UTCJul 10, 21:40 UTC2h 41m
2026-07-10 SWA1223 - Jul 10, 15:45 UTCJul 10, 17:35 UTC1h 50m
2026-07-10 SWA3419 - Jul 10, 14:15 UTCJul 10, 14:35 UTC20m
2026-07-10 SWA3419 DEN → COS Jul 10, 14:13 UTCJul 10, 14:36 UTC23m
2026-07-10 SWA1186 - Jul 10, 10:15 UTCJul 10, 12:55 UTC2h 40m
2026-07-10 SWA1289 - Jul 10, 02:20 UTCJul 10, 04:30 UTC2h 10m
2026-07-09 SWA1403 DCA → DAL Jul 9, 22:55 UTCJul 10, 01:30 UTC2h 35m
2026-07-09 SWA281 AUS → DCA Jul 9, 18:25 UTCJul 9, 21:15 UTC2h 50m
2026-07-09 SWA281 - Jul 9, 14:05 UTCJul 9, 16:35 UTC2h 30m
2026-07-09 SWA1704 - Jul 9, 05:30 UTCJul 9, 07:20 UTC1h 50m
2026-07-09 SWA2675 MDW → DEN Jul 9, 01:35 UTCJul 9, 04:00 UTC2h 25m
2026-07-09 SWA2675 MDW → DEN Jul 9, 01:35 UTCJul 9, 04:25 UTC2h 50m
2026-07-08 SWA360 AUS → MDW Jul 8, 20:30 UTCJul 8, 22:45 UTC2h 15m
2026-07-08 SWA3475 - Jul 8, 16:45 UTCJul 8, 19:15 UTC2h 30m
2026-07-08 SWA3103 - Jul 8, 11:20 UTCJul 8, 14:50 UTC3h 30m
2026-07-08 SWA3103 MDW → SAN Jul 8, 11:19 UTCJul 8, 14:50 UTC3h 31m
2026-07-08 SWA3766 - Jul 8, 01:10 UTCJul 8, 02:40 UTC1h 30m
2026-07-07 SWA4411 - Jul 7, 20:10 UTCJul 7, 22:35 UTC2h 25m
2026-07-07 SWA4411 HOU → RDU Jul 7, 20:05 UTCJul 7, 22:19 UTC2h 14m
2026-07-07 SWA981 - Jul 7, 16:00 UTCJul 7, 18:30 UTC2h 30m
2026-07-07 SWA4205 SLC → LAS Jul 7, 12:55 UTCJul 7, 13:50 UTC55m
2026-07-07 SWA2229 - Jul 7, 03:30 UTCJul 7, 04:45 UTC1h 15m
2026-07-07 SWA1322 LAS → LGB Jul 7, 01:45 UTCJul 7, 02:30 UTC45m
2026-07-07 SWA1322 LAS → LGB Jul 7, 01:45 UTCJul 7, 02:26 UTC41m
2026-07-06 SWA1322 - Jul 6, 22:05 UTCJul 7, 00:25 UTC2h 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 N8916Q page for operator, model, and routing details .

Mode-S AC4C44 frequently asked

What is Mode-S code AC4C44?
AC4C44 is an ICAO 24-bit transponder address. Allocated to United States. Assigned to N8916Q.
Where is Mode-S AC4C44 registered?
Mode-S code AC4C44 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 AC4C44 broadcasting right now?
Yes. Mode-S AC4C44 is currently airborne.
Hex, octal, and decimal Mode-S codes: what's the difference?
The same 24-bit identifier expressed in different bases: hex AC4C44, octal 53046104, decimal 11,291,716.
What flights does AC4C44 operate?
Mode-S AC4C44 has broadcast 20 distinct callsigns, including SWA163, SWA981, SWA942, SWA776, SWA560.