Apparatus

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sensors Mode-S transponder

AC00B1

ICAO 24-bit transponder address · allocated to United States

Currently assigned to N8724J · BOEING 737 MAX 8 · operated by UMB BANK NA TRUSTEE

Hex
AC00B1
Octal
53000261
Decimal
11,272,369
Country
US
Tail
N8724J
Type
B38M
No current signal · last broadcast Jul 26, 22:15 UTC
Flights observed
720
Distinct callsigns
20
Country
US
Last broadcast
Jul 26, 22:15 UTC

Last known position

Most recent position reported by Mode-S AC00B1.

Country allocation

The ICAO 24-bit address AC00B1 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
SWA2396 - 6 2026-07-05
SWA808 Southwest Airlines 5 2026-06-01
SWA2151 Southwest Airlines 5 2026-06-05
SWA665 - 4 2026-06-25
SWA587 Southwest Airlines 4 2026-05-20
SWA55 Southwest Airlines 4 2026-04-28
SWA510 Southwest Airlines 4 2026-04-15
SWA3895 Southwest Airlines 4 2026-06-02
SWA3807 Southwest Airlines 4 2026-05-05
SWA3693 - 4 2026-04-13
SWA2821 Southwest Airlines 4 2026-07-25
SWA2656 Southwest Airlines 4 2026-05-21
SWA1987 Southwest Airlines 4 2026-06-03
SWA1914 - 4 2026-06-19
SWA971 - 3 2026-07-12
SWA946 Southwest Airlines 3 2026-07-22
SWA869 Southwest Airlines 3 2026-05-30
SWA589 Southwest Airlines 3 2026-06-08
SWA501 Southwest Airlines 3 2026-05-17
SWA489 Southwest Airlines 3 2026-06-12

Recent flights last 50

DateFlightRouteTakeoffLandingDuration
2026-07-26 SWA451 SNA → SJC Jul 26, 20:40 UTCJul 26, 22:15 UTC1h 35m
2026-07-26 SWA2604 MCO → MDW Jul 26, 17:55 UTCJul 26, 19:30 UTC1h 35m
2026-07-26 SWA2604 MCO → MDW Jul 26, 17:52 UTCJul 26, 19:26 UTC1h 34m
2026-07-26 SWA3483 MDW → ALB Jul 26, 14:30 UTCJul 26, 16:20 UTC1h 50m
2026-07-26 SWA3471 DEN → SAN Jul 26, 10:15 UTCJul 26, 12:20 UTC2h 5m
2026-07-26 SWA4709 MCO → JAN Jul 26, 01:00 UTCJul 26, 01:30 UTC30m
2026-07-26 SWA4709 MCO → JAN Jul 26, 00:57 UTCJul 26, 01:28 UTC31m
2026-07-25 SWA104 RSW → BWI Jul 25, 21:35 UTCJul 25, 23:45 UTC2h 10m
2026-07-25 SWA104 RSW → BWI Jul 25, 21:30 UTCJul 25, 23:44 UTC2h 15m
2026-07-25 SWA3192 LAS → SFO Jul 25, 18:10 UTCJul 25, 20:35 UTC2h 25m
2026-07-25 SWA2147 SFO → BUR Jul 25, 14:40 UTCJul 25, 17:00 UTC2h 20m
2026-07-25 SWA4544 LAS → PDX Jul 25, 11:15 UTCJul 25, 13:25 UTC2h 10m
2026-07-25 SWA4544 LAS → PDX Jul 25, 11:13 UTCJul 25, 13:25 UTC2h 12m
2026-07-25 SWA2821 MCI → OAK Jul 25, 02:05 UTCJul 25, 04:10 UTC2h 5m
2026-07-25 SWA2821 MCI → OAK Jul 25, 02:00 UTCJul 25, 04:05 UTC2h 5m
2026-07-24 SWA1447 OGG → SJC Jul 24, 23:30 UTCJul 25, 01:00 UTC1h 30m
2026-07-24 SWA3515 LGB → DAL Jul 24, 21:10 UTCJul 24, 22:20 UTC1h 10m
2026-07-24 SWA856 PIT → DAL Jul 24, 18:15 UTCJul 24, 19:55 UTC1h 40m
2026-07-24 SWA856 PIT → DAL Jul 24, 18:13 UTCJul 24, 19:55 UTC1h 42m
2026-07-24 SWA2571 DAL → MDW Jul 24, 16:10 UTCJul 24, 17:10 UTC1h 0m
2026-07-24 SWA1343 SJC → SEA Jul 24, 13:45 UTCJul 24, 14:55 UTC1h 10m
2026-07-24 SWA1343 SJC → SEA Jul 24, 13:43 UTCJul 24, 14:52 UTC1h 9m
2026-07-24 SWA4458 STL → OMA Jul 24, 11:25 UTCJul 24, 12:40 UTC1h 15m
2026-07-24 SWA4458 STL → OMA Jul 24, 11:12 UTCJul 24, 12:40 UTC1h 28m
2026-07-24 SWA1980 LAX → MCI Jul 24, 03:55 UTCJul 24, 05:05 UTC1h 10m
2026-07-24 SWA1980 LAX → MCI Jul 24, 03:50 UTCJul 24, 05:15 UTC1h 25m
2026-07-24 SWA4604 ATL → STL Jul 24, 00:10 UTCJul 24, 02:35 UTC2h 25m
2026-07-23 SWA3470 TPA → PHL Jul 23, 21:05 UTCJul 23, 23:10 UTC2h 5m
2026-07-23 SWA3470 TPA → PHL Jul 23, 21:00 UTCJul 23, 23:08 UTC2h 8m
2026-07-23 SWA2137 MDW → PHL Jul 23, 18:05 UTCJul 23, 20:05 UTC2h 0m
2026-07-23 SWA2137 MDW → PHL Jul 23, 18:01 UTCJul 23, 20:00 UTC1h 59m
2026-07-23 SWA1552 SJC → GEG Jul 23, 15:00 UTCJul 23, 16:55 UTC1h 55m
2026-07-23 SWA2942 BDL → MDW Jul 23, 10:35 UTCJul 23, 12:40 UTC2h 5m
2026-07-23 SWA3300 MDW → MEM Jul 23, 02:30 UTCJul 23, 05:30 UTC3h 0m
2026-07-23 SWA3300 MDW → MEM Jul 23, 02:27 UTCJul 23, 05:27 UTC3h 0m
2026-07-23 SWA4972 MDW → OAK Jul 23, 00:15 UTCJul 23, 00:50 UTC35m
2026-07-22 SWA4972 MDW → OAK Jul 22, 23:53 UTCJul 23, 00:45 UTC52m
2026-07-22 SWA946 PHX → DAL Jul 22, 21:15 UTCJul 22, 22:05 UTC50m
2026-07-22 SWA946 PHX → DAL Jul 22, 21:12 UTCJul 22, 22:22 UTC1h 10m
2026-07-22 SWA1784 BLI → OAK Jul 22, 18:05 UTCJul 22, 19:40 UTC1h 35m
2026-07-22 SWA1784 BLI → OAK Jul 22, 18:00 UTCJul 22, 19:37 UTC1h 37m
2026-07-22 SWA3032 LAS → OAK Jul 22, 15:10 UTCJul 22, 16:40 UTC1h 30m
2026-07-22 SWA1787 MDW → BOS Jul 22, 12:10 UTCJul 22, 13:40 UTC1h 30m
2026-07-22 SWA1787 MDW → BOS Jul 22, 12:09 UTCJul 22, 13:34 UTC1h 25m
2026-07-22 SWA2399 LAS → BUR Jul 22, 01:35 UTCJul 22, 03:05 UTC1h 30m
2026-07-21 SWA4553 MDW → SDF Jul 21, 02:55 UTCJul 21, 03:45 UTC50m
2026-07-21 SWA4553 MDW → SDF Jul 21, 02:54 UTCJul 21, 03:41 UTC48m
2026-07-21 SWA4415 PHX → CLE Jul 21, 01:30 UTCJul 21, 02:10 UTC40m
2026-07-20 SWA4097 OAK → BUR Jul 20, 21:35 UTCJul 21, 00:30 UTC2h 55m
2026-07-20 SWA4097 OAK → BUR Jul 20, 21:32 UTCJul 21, 00:23 UTC2h 51m

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 N8724J page for operator, model, and routing details .

Mode-S AC00B1 frequently asked

What is Mode-S code AC00B1?
AC00B1 is an ICAO 24-bit transponder address. Allocated to United States. Assigned to N8724J.
Where is Mode-S AC00B1 registered?
Mode-S code AC00B1 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 AC00B1 broadcasting right now?
No active broadcast right now. Last signal was Jul 26, 22:15 UTC.
Hex, octal, and decimal Mode-S codes: what's the difference?
The same 24-bit identifier expressed in different bases: hex AC00B1, octal 53000261, decimal 11,272,369.
What flights does AC00B1 operate?
Mode-S AC00B1 has broadcast 20 distinct callsigns, including SWA2396, SWA808, SWA2151, SWA665, SWA587.