Apparatus

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sensors Mode-S transponder

AC53F8

ICAO 24-bit transponder address · allocated to United States

Currently assigned to N8938Q · BOEING 737 MAX 8 · operated by SOUTHWEST AIRLINES CO

Hex
AC53F8
Octal
53051770
Decimal
11,293,688
Country
US
Tail
N8938Q
Type
B38M
No current signal · last broadcast Jul 26, 22:00 UTC
Flights observed
684
Distinct callsigns
20
Country
US
Last broadcast
Jul 26, 22:00 UTC

Last known position

Most recent position reported by Mode-S AC53F8.

Country allocation

The ICAO 24-bit address AC53F8 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
SWA336 Southwest Airlines 5 2026-04-15
SWA2708 - 5 2026-07-18
SWA2640 - 5 2026-07-12
SWA898 Southwest Airlines 4 2026-05-05
SWA783 - 4 2026-07-14
SWA4297 - 4 2026-07-13
SWA4252 Southwest Airlines 4 2026-05-03
SWA4143 - 4 2026-07-09
SWA3475 Southwest Airlines 4 2026-06-01
SWA2918 Southwest Airlines 4 2026-05-16
SWA255 - 4 2026-07-07
SWA239 Southwest Airlines 4 2026-07-26
SWA2125 Southwest Airlines 4 2026-05-30
SWA1973 - 4 2026-04-13
SWA713 Southwest Airlines 3 2026-06-13
SWA705 Southwest Airlines 3 2026-05-17
SWA4514 - 3 2026-07-17
SWA4510 Southwest Airlines 3 2026-06-08
SWA451 Southwest Airlines 3 2026-04-22
SWA4493 Southwest Airlines 3 2026-07-19

Recent flights last 50

DateFlightRouteTakeoffLandingDuration
2026-07-26 SWA1251 OAK → BUR Jul 26, 21:50 UTCJul 26, 22:00 UTC10m
2026-07-26 SWA2548 SEA → OAK Jul 26, 19:00 UTCJul 26, 20:20 UTC1h 20m
2026-07-26 SWA1586 AUS → MDW Jul 26, 16:20 UTCJul 26, 17:25 UTC1h 5m
2026-07-26 SWA239 LAX → SJC Jul 26, 13:30 UTCJul 26, 15:05 UTC1h 35m
2026-07-26 SWA239 LAX → SJC Jul 26, 11:05 UTCJul 26, 12:20 UTC1h 15m
2026-07-26 SWA1756 PHX → ELP Jul 26, 00:52 UTCJul 26, 02:27 UTC1h 35m
2026-07-26 SWA1756 PHX → ELP Jul 26, 00:55 UTCJul 26, 02:30 UTC1h 35m
2026-07-25 SWA3641 SJC → LAX Jul 25, 21:35 UTCJul 25, 23:35 UTC2h 0m
2026-07-25 SWA3641 SJC → LAX Jul 25, 21:33 UTCJul 25, 23:29 UTC1h 57m
2026-07-25 SWA185 ATL → LGA Jul 25, 18:40 UTCJul 25, 20:10 UTC1h 30m
2026-07-25 SWA185 ATL → LGA Jul 25, 18:39 UTCJul 25, 20:07 UTC1h 29m
2026-07-25 SWA403 JAX → BWI Jul 25, 16:20 UTCJul 25, 17:35 UTC1h 15m
2026-07-25 SWA3844 LGA → MDW Jul 25, 12:50 UTCJul 25, 15:05 UTC2h 15m
2026-07-25 SWA4188 BOS → BWI Jul 25, 10:30 UTCJul 25, 11:45 UTC1h 15m
2026-07-25 SWA2266 SJC → SAN Jul 25, 03:45 UTCJul 25, 06:00 UTC2h 15m
2026-07-25 SWA2266 SJC → SAN Jul 25, 00:45 UTCJul 25, 01:50 UTC1h 5m
2026-07-24 SWA2350 LAS → FAT Jul 24, 22:30 UTCJul 24, 23:30 UTC1h 0m
2026-07-24 SWA2350 LAS → FAT Jul 24, 22:25 UTCJul 24, 23:27 UTC1h 2m
2026-07-24 SWA4676 RSW → MSP Jul 24, 20:15 UTCJul 24, 21:15 UTC1h 0m
2026-07-24 SWA4685 MDW → BOI Jul 24, 18:15 UTCJul 24, 19:05 UTC50m
2026-07-24 SWA4685 MDW → BOI Jul 24, 15:40 UTCJul 24, 16:50 UTC1h 10m
2026-07-24 SWA1943 ATL → MSY Jul 24, 12:50 UTCJul 24, 14:30 UTC1h 40m
2026-07-24 SWA954 MEM → DAL Jul 24, 04:00 UTCJul 24, 05:55 UTC1h 55m
2026-07-24 SWA954 MEM → DAL Jul 24, 03:56 UTCJul 24, 05:58 UTC2h 2m
2026-07-24 SWA3766 TPA → ALB Jul 24, 01:25 UTCJul 24, 02:50 UTC1h 25m
2026-07-23 SWA183 OAK → LAS Jul 23, 23:35 UTCJul 24, 00:25 UTC50m
2026-07-23 SWA183 OAK → LAS Jul 23, 20:55 UTCJul 23, 22:15 UTC1h 20m
2026-07-23 SWA651 AUS → OAK Jul 23, 17:20 UTCJul 23, 19:20 UTC2h 0m
2026-07-23 SWA4319 HRL → DAL Jul 23, 14:25 UTCJul 23, 16:05 UTC1h 40m
2026-07-23 SWA4319 HRL → DAL Jul 23, 14:24 UTCJul 23, 16:05 UTC1h 41m
2026-07-23 SWA1791 BWI → BUF Jul 23, 12:10 UTCJul 23, 13:15 UTC1h 5m
2026-07-23 SWA3373 BWI → HOU Jul 23, 03:25 UTCJul 23, 04:25 UTC1h 0m
2026-07-23 SWA196 BWI → ALB Jul 23, 00:50 UTCJul 23, 02:25 UTC1h 35m
2026-07-22 SWA4176 SJC → SAN Jul 22, 20:54 UTCJul 22, 23:18 UTC2h 24m
2026-07-22 SWA4176 SJC → SAN Jul 22, 21:00 UTCJul 22, 23:20 UTC2h 20m
2026-07-22 SWA4346 BUF → RSW Jul 22, 18:00 UTCJul 22, 19:40 UTC1h 40m
2026-07-22 SWA4346 BUF → RSW Jul 22, 18:00 UTCJul 22, 19:35 UTC1h 36m
2026-07-22 SWA2869 BDL → MDW Jul 22, 15:40 UTCJul 22, 16:45 UTC1h 5m
2026-07-22 SWA4154 SJC → ONT Jul 22, 11:45 UTCJul 22, 13:30 UTC1h 45m
2026-07-22 SWA2686 BWI → PWM Jul 22, 02:17 UTCJul 22, 05:11 UTC2h 54m
2026-07-22 SWA2686 BWI → PWM Jul 22, 02:20 UTCJul 22, 05:15 UTC2h 55m
2026-07-21 SWA278 PHL → STL Jul 21, 22:35 UTCJul 22, 00:35 UTC2h 0m
2026-07-21 SWA278 PHL → STL Jul 21, 22:33 UTCJul 22, 00:35 UTC2h 2m
2026-07-21 SWA940 DAL → MAF Jul 21, 20:19 UTCJul 21, 21:12 UTC53m
2026-07-21 SWA940 DAL → MAF Jul 21, 20:20 UTCJul 21, 21:15 UTC55m
2026-07-21 SWA3752 HOU → MDW Jul 21, 15:30 UTCJul 21, 19:20 UTC3h 50m
2026-07-21 SWA1537 PHL → STL Jul 21, 12:55 UTCJul 21, 13:55 UTC1h 0m
2026-07-21 SWA2339 BNA → MDW Jul 21, 01:00 UTCJul 21, 04:25 UTC3h 25m
2026-07-20 SWA2339 BNA → MDW Jul 20, 22:45 UTCJul 20, 23:55 UTC1h 9m
2026-07-20 SWA3862 ONT → OAK Jul 20, 20:40 UTCJul 20, 21:35 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 N8938Q page for operator, model, and routing details .

Mode-S AC53F8 frequently asked

What is Mode-S code AC53F8?
AC53F8 is an ICAO 24-bit transponder address. Allocated to United States. Assigned to N8938Q.
Where is Mode-S AC53F8 registered?
Mode-S code AC53F8 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 AC53F8 broadcasting right now?
No active broadcast right now. Last signal was Jul 26, 22:00 UTC.
Hex, octal, and decimal Mode-S codes: what's the difference?
The same 24-bit identifier expressed in different bases: hex AC53F8, octal 53051770, decimal 11,293,688.
What flights does AC53F8 operate?
Mode-S AC53F8 has broadcast 20 distinct callsigns, including SWA336, SWA2708, SWA2640, SWA898, SWA783.