Apparatus

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sensors Mode-S transponder

AC53B2

ICAO 24-bit transponder address · allocated to United States

Currently assigned to N8936Q · BOEING 737 MAX 8 · operated by SOUTHWEST AIRLINES CO

Hex
AC53B2
Octal
53051662
Decimal
11,293,618
Country
US
Tail
N8936Q
Type
B38M
Transponder active on ground
Flights observed
764
Distinct callsigns
20
Country
US
Last broadcast
Jul 26, 22:30 UTC

Last known position

Most recent position reported by Mode-S AC53B2.

Country allocation

The ICAO 24-bit address AC53B2 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
SWA426 - 5 2026-07-20
SWA765 Southwest Airlines 4 2026-07-20
SWA756 - 4 2026-07-11
SWA608 Southwest Airlines 4 2026-07-19
SWA4988 - 4 2026-07-16
SWA4472 Southwest Airlines 4 2026-05-03
SWA4341 Southwest Airlines 4 2026-06-10
SWA3042 Southwest Airlines 4 2026-06-08
SWA2674 - 4 2026-07-21
SWA2462 - 4 2026-06-22
SWA2367 - 4 2026-06-14
SWA1498 - 4 2026-06-29
SWA656 Southwest Airlines 3 2026-07-23
SWA626 - 3 2026-06-29
SWA563 - 3 2026-07-03
SWA4669 Southwest Airlines 3 2026-05-21
SWA4509 Southwest Airlines 3 2026-04-24
SWA4299 - 3 2026-07-07
SWA4206 - 3 2026-07-05
SWA389 - 3 2026-07-20

Recent flights last 50

DateFlightRouteTakeoffLandingDuration
2026-07-26 SWA1422 RDU → MDW Jul 26, 21:15 UTCJul 26, 22:30 UTC1h 15m
2026-07-26 SWA1422 RDU → MDW Jul 26, 17:05 UTCJul 26, 20:15 UTC3h 10m
2026-07-26 SWA19 PHX → DAL Jul 26, 13:55 UTCJul 26, 16:00 UTC2h 5m
2026-07-26 SWA199 SJC → BUR Jul 26, 10:05 UTCJul 26, 12:10 UTC2h 5m
2026-07-26 SWA199 SJC → BUR Jul 26, 10:05 UTCJul 26, 12:05 UTC2h 1m
2026-07-26 SWA2279 AUS → MDW Jul 26, 02:10 UTCJul 26, 05:10 UTC3h 0m
2026-07-26 SWA2279 AUS → MDW Jul 26, 02:05 UTCJul 26, 05:01 UTC2h 56m
2026-07-26 SWA2279 AUS → MDW Jul 26, 00:00 UTCJul 26, 00:55 UTC55m
2026-07-25 SWA2104 STL → LGA Jul 25, 21:30 UTCJul 25, 22:20 UTC50m
2026-07-25 SWA2104 STL → LGA Jul 25, 21:28 UTCJul 25, 22:20 UTC52m
2026-07-25 SWA1536 BWI → BOS Jul 25, 17:30 UTCJul 25, 20:05 UTC2h 35m
2026-07-25 SWA1536 BWI → BOS Jul 25, 17:29 UTCJul 25, 20:03 UTC2h 34m
2026-07-25 SWA1536 BWI → BOS Jul 25, 15:25 UTCJul 25, 16:15 UTC50m
2026-07-25 SWA3378 LGB → OAK Jul 25, 13:10 UTCJul 25, 14:10 UTC1h 0m
2026-07-25 SWA4073 PHX → DAL Jul 25, 09:50 UTCJul 25, 12:00 UTC2h 10m
2026-07-25 SWA4073 PHX → DAL Jul 25, 09:45 UTCJul 25, 12:00 UTC2h 15m
2026-07-25 SWA46 HOU → DAL Jul 25, 00:50 UTCJul 25, 03:20 UTC2h 30m
2026-07-24 SWA1323 STL → SRQ Jul 24, 22:20 UTCJul 24, 23:25 UTC1h 5m
2026-07-24 SWA4795 PHX → RDU Jul 24, 19:30 UTCJul 24, 21:10 UTC1h 40m
2026-07-24 SWA4795 PHX → RDU Jul 24, 17:15 UTCJul 24, 18:25 UTC1h 10m
2026-07-24 SWA4572 HOU → LAS Jul 24, 13:06 UTCJul 24, 16:10 UTC3h 4m
2026-07-24 SWA4572 HOU → LAS Jul 24, 13:10 UTCJul 24, 16:05 UTC2h 55m
2026-07-23 SWA2564 BUR → SJC Jul 23, 23:30 UTCJul 24, 01:50 UTC2h 20m
2026-07-23 SWA3798 OAK → LAS Jul 23, 19:10 UTCJul 23, 21:55 UTC2h 45m
2026-07-23 SWA3166 SJC → SAN Jul 23, 17:00 UTCJul 23, 18:00 UTC1h 0m
2026-07-23 SWA1660 SLC → DEN Jul 23, 14:14 UTCJul 23, 16:00 UTC1h 46m
2026-07-23 SWA1660 SLC → DEN Jul 23, 14:15 UTCJul 23, 16:05 UTC1h 50m
2026-07-23 SWA1970 - Jul 23, 10:45 UTCJul 23, 12:45 UTC2h 0m
2026-07-23 SWA656 PHX → SAN Jul 23, 01:10 UTCJul 23, 02:15 UTC1h 5m
2026-07-22 SWA656 PHX → SAN Jul 22, 20:05 UTCJul 22, 22:55 UTC2h 50m
2026-07-22 SWA656 PHX → SAN Jul 22, 17:55 UTCJul 22, 18:45 UTC50m
2026-07-22 SWA3464 ATL → MSY Jul 22, 15:55 UTCJul 22, 16:35 UTC40m
2026-07-22 SWA4469 AUS → SAN Jul 22, 12:15 UTCJul 22, 14:35 UTC2h 20m
2026-07-21 SWA3633 OAK → SEA Jul 21, 20:55 UTCJul 22, 00:10 UTC3h 15m
2026-07-21 SWA3633 OAK → SEA Jul 21, 20:54 UTCJul 22, 00:08 UTC3h 14m
2026-07-21 SWA2674 - Jul 21, 16:45 UTCJul 21, 19:45 UTC3h 0m
2026-07-21 SWA1474 BOS → MDW Jul 21, 13:20 UTCJul 21, 15:10 UTC1h 50m
2026-07-21 SWA2649 - Jul 21, 03:10 UTCJul 21, 05:05 UTC1h 55m
2026-07-21 SWA2366 SJC → BUR Jul 21, 01:40 UTCJul 21, 02:20 UTC40m
2026-07-20 SWA3283 PHX → LAS Jul 20, 23:50 UTCJul 21, 00:35 UTC45m
2026-07-20 SWA765 CLE → BWI Jul 20, 21:20 UTCJul 20, 22:13 UTC53m
2026-07-20 SWA765 CLE → BWI Jul 20, 21:20 UTCJul 20, 22:15 UTC55m
2026-07-20 SWA389 AUS → SAN Jul 20, 17:35 UTCJul 20, 20:00 UTC2h 25m
2026-07-20 SWA1848 BWI → MHT Jul 20, 13:40 UTCJul 20, 16:20 UTC2h 40m
2026-07-20 SWA426 - Jul 20, 10:15 UTCJul 20, 12:20 UTC2h 5m
2026-07-20 SWA4564 DAL → CMH Jul 20, 01:45 UTCJul 20, 03:45 UTC2h 0m
2026-07-19 SWA1839 MDW → CLT Jul 19, 22:20 UTCJul 20, 00:30 UTC2h 10m
2026-07-19 SWA4304 RSW → ALB Jul 19, 17:55 UTCJul 19, 20:45 UTC2h 50m
2026-07-19 SWA2965 BWI → DEN Jul 19, 15:10 UTCJul 19, 16:35 UTC1h 25m
2026-07-19 SWA1243 DAL → DEN Jul 19, 12:55 UTCJul 19, 14:05 UTC1h 10m

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 N8936Q page for operator, model, and routing details .

Mode-S AC53B2 frequently asked

What is Mode-S code AC53B2?
AC53B2 is an ICAO 24-bit transponder address. Allocated to United States. Assigned to N8936Q.
Where is Mode-S AC53B2 registered?
Mode-S code AC53B2 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 AC53B2 broadcasting right now?
Mode-S AC53B2 is currently broadcasting from the ground.
Hex, octal, and decimal Mode-S codes: what's the difference?
The same 24-bit identifier expressed in different bases: hex AC53B2, octal 53051662, decimal 11,293,618.
What flights does AC53B2 operate?
Mode-S AC53B2 has broadcast 20 distinct callsigns, including SWA426, SWA765, SWA756, SWA608, SWA4988.