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sensors Mode-S transponder

AC08B1

ICAO 24-bit transponder address · allocated to United States

Currently assigned to N8748Q · BOEING 737 MAX 8 · operated by UMB BANK NA TRUSTEE

Hex
AC08B1
Octal
53004261
Decimal
11,274,417
Country
US
Tail
N8748Q
Type
B38M
Broadcasting now · callsign SWA1524 · 4,125 ft
Flights observed
567
Distinct callsigns
20
Country
US
Last broadcast
1h ago

Current position

AC08B1 is currently broadcasting. Map zoomed to live position.

Country allocation

The ICAO 24-bit address AC08B1 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
SWA2332 Southwest Airlines 9 2026-06-03
SWA2525 Southwest Airlines 7 2026-06-03
SWA3218 - 6 2026-07-07
SWA1916 - 6 2026-07-07
SWA3783 Southwest Airlines 5 2026-06-10
SWA2711 Southwest Airlines 5 2026-06-13
SWA2321 Southwest Airlines 5 2026-06-23
SWA1775 Southwest Airlines 5 2026-05-28
SWA3409 Southwest Airlines 4 2026-05-28
SWA4279 Southwest Airlines 3 2026-05-05
SWA4251 - 3 2026-07-12
SWA409 - 3 2026-06-28
SWA4012 Southwest Airlines 3 2026-06-22
SWA3993 Southwest Airlines 3 2026-05-15
SWA3982 - 3 2026-04-14
SWA3804 Southwest Airlines 3 2026-05-09
SWA3781 - 3 2026-07-01
SWA3731 - 3 2026-07-12
SWA3728 Southwest Airlines 3 2026-06-16
SWA3484 - 3 2026-04-13

Recent flights last 50

DateFlightRouteTakeoffLandingDuration
2026-07-15 SWA1524 - Jul 15, 00:15 UTCJul 15, 02:10 UTC1h 55m
2026-07-14 SWA1524 DSM → MDW Jul 14, 21:45 UTCJul 14, 22:40 UTC55m
2026-07-14 SWA1524 - Jul 14, 19:15 UTCJul 14, 20:35 UTC1h 20m
2026-07-14 SWA3261 - Jul 14, 16:35 UTCJul 14, 18:00 UTC1h 25m
2026-07-14 SWA3261 - Jul 14, 14:25 UTCJul 14, 15:20 UTC55m
2026-07-14 SWA744 - Jul 14, 03:30 UTCJul 14, 05:20 UTC1h 50m
2026-07-13 SWA3002 ATL → DEN Jul 13, 23:45 UTCJul 14, 02:20 UTC2h 35m
2026-07-13 SWA2107 - Jul 13, 20:45 UTCJul 13, 21:55 UTC1h 10m
2026-07-13 SWA2107 IND → ATL Jul 13, 20:40 UTCJul 13, 21:57 UTC1h 17m
2026-07-13 SWA3186 - Jul 13, 16:25 UTCJul 13, 19:25 UTC3h 0m
2026-07-13 SWA3186 SJC → PHX Jul 13, 13:40 UTCJul 13, 15:10 UTC1h 30m
2026-07-13 SWA1728 DEN → SJC Jul 13, 03:50 UTCJul 13, 05:50 UTC2h 0m
2026-07-13 SWA4639 - Jul 13, 00:30 UTCJul 13, 02:25 UTC1h 55m
2026-07-12 SWA1203 - Jul 12, 19:01 UTCJul 12, 22:20 UTC3h 20m
2026-07-12 SWA602 BWI → SJO Jul 12, 13:20 UTCJul 12, 17:30 UTC4h 10m
2026-07-12 SWA4251 TPA → BWI Jul 12, 09:35 UTCJul 12, 11:35 UTC2h 0m
2026-07-12 SWA4251 TPA → BWI Jul 12, 09:34 UTCJul 12, 11:29 UTC1h 55m
2026-07-12 SWA3731 - Jul 12, 02:20 UTCJul 12, 03:15 UTC55m
2026-07-12 SWA3731 - Jul 12, 00:40 UTCJul 12, 00:55 UTC15m
2026-07-12 SWA3731 SJU → TPA Jul 12, 00:39 UTCJul 12, 03:10 UTC2h 31m
2026-07-11 SWA1103 - Jul 11, 23:00 UTCJul 11, 23:20 UTC20m
2026-07-11 SWA1103 - Jul 11, 19:45 UTCJul 11, 21:15 UTC1h 30m
2026-07-11 SWA3896 - Jul 11, 13:50 UTCJul 11, 18:15 UTC4h 25m
2026-07-11 SWA1089 - Jul 11, 01:50 UTCJul 11, 06:40 UTC4h 50m
2026-07-11 SWA1089 BWI → SAN Jul 11, 01:47 UTCJul 11, 06:36 UTC4h 49m
2026-07-10 SWA1610 CUN → BWI Jul 10, 20:45 UTCJul 10, 23:45 UTC3h 0m
2026-07-10 SWA1609 BWI → CUN Jul 10, 16:15 UTCJul 10, 19:15 UTC3h 0m
2026-07-10 SWA421 - Jul 10, 13:10 UTCJul 10, 14:05 UTC55m
2026-07-10 SWA869 - Jul 10, 11:00 UTCJul 10, 11:50 UTC50m
2026-07-10 SWA1501 DEN → BWI Jul 10, 06:20 UTCJul 10, 09:20 UTC3h 0m
2026-07-10 SWA3267 PHX → DEN Jul 10, 03:50 UTCJul 10, 05:10 UTC1h 20m
2026-07-10 SWA4557 ABQ → PHX Jul 10, 01:40 UTCJul 10, 02:35 UTC55m
2026-07-10 SWA4557 ABQ → PHX Jul 10, 01:40 UTCJul 10, 02:36 UTC56m
2026-07-09 SWA4528 - Jul 9, 20:45 UTCJul 10, 00:15 UTC3h 30m
2026-07-09 SWA4528 BWI → ABQ Jul 9, 20:44 UTCJul 10, 00:21 UTC3h 37m
2026-07-09 SWA2744 - Jul 9, 17:25 UTCJul 9, 18:50 UTC1h 25m
2026-07-09 SWA2744 OAK → MDW Jul 9, 12:35 UTCJul 9, 16:05 UTC3h 30m
2026-07-09 SWA4554 - Jul 9, 04:05 UTCJul 9, 04:55 UTC50m
2026-07-08 SWA1326 - Jul 8, 11:25 UTCJul 8, 13:55 UTC2h 30m
2026-07-08 SWA1326 DAL → LAX Jul 8, 11:20 UTCJul 8, 13:53 UTC2h 33m
2026-07-07 SWA3218 - Jul 7, 23:00 UTCJul 8, 01:55 UTC2h 55m
2026-07-07 SWA3218 PHL → DAL Jul 7, 22:56 UTCJul 8, 01:50 UTC2h 54m
2026-07-07 SWA3218 PHL → PHL Jul 7, 22:40 UTCJul 7, 22:55 UTC15m
2026-07-07 SWA3218 - Jul 7, 21:45 UTCJul 7, 21:50 UTC5m
2026-07-07 SWA2034 - Jul 7, 19:20 UTCJul 7, 21:15 UTC1h 55m
2026-07-07 SWA2034 - Jul 7, 16:00 UTCJul 7, 17:55 UTC1h 55m
2026-07-07 SWA204 - Jul 7, 12:45 UTCJul 7, 14:30 UTC1h 45m
2026-07-07 SWA1916 - Jul 7, 05:25 UTCJul 7, 06:50 UTC1h 25m
2026-07-06 SWA1916 - Jul 6, 23:15 UTCJul 7, 04:05 UTC4h 50m
2026-07-06 SWA1865 - Jul 6, 20:55 UTCJul 6, 21:10 UTC15m

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 N8748Q page for operator, model, and routing details .

Mode-S AC08B1 frequently asked

What is Mode-S code AC08B1?
AC08B1 is an ICAO 24-bit transponder address. Allocated to United States. Assigned to N8748Q.
Where is Mode-S AC08B1 registered?
Mode-S code AC08B1 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 AC08B1 broadcasting right now?
Yes. Mode-S AC08B1 is currently airborne.
Hex, octal, and decimal Mode-S codes: what's the difference?
The same 24-bit identifier expressed in different bases: hex AC08B1, octal 53004261, decimal 11,274,417.
What flights does AC08B1 operate?
Mode-S AC08B1 has broadcast 20 distinct callsigns, including SWA2332, SWA2525, SWA3218, SWA1916, SWA3783.