Apparatus

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sensors Mode-S transponder

AC42BF

ICAO 24-bit transponder address · allocated to United States

Currently assigned to N8898L · BOEING 737 MAX 8 · operated by SOUTHWEST AIRLINES CO

Hex
AC42BF
Octal
53041277
Decimal
11,289,279
Country
US
Tail
N8898L
Type
B38M
Broadcasting now · callsign SWA183 · 41,000 ft
Flights observed
704
Distinct callsigns
20
Country
US
Last broadcast
Jul 26, 21:45 UTC

Current position

AC42BF is currently broadcasting. Map zoomed to live position.

Country allocation

The ICAO 24-bit address AC42BF 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
SWA2328 - 7 2026-07-16
SWA745 - 5 2026-07-11
SWA714 Southwest Airlines 5 2026-05-13
SWA2863 Southwest Airlines 5 2026-05-02
SWA2618 Southwest Airlines 5 2026-04-17
SWA998 Southwest Airlines 4 2026-05-13
SWA4124 Southwest Airlines 4 2026-05-21
SWA409 - 4 2026-06-25
SWA3190 Southwest Airlines 4 2026-07-22
SWA2754 Southwest Airlines 4 2026-04-18
SWA2576 - 4 2026-04-13
SWA2536 Southwest Airlines 4 2026-06-03
SWA2391 - 4 2026-07-09
SWA1975 - 4 2026-07-01
SWA937 - 3 2026-07-02
SWA8506 Southwest Airlines 3 2026-06-09
SWA4930 Southwest Airlines 3 2026-06-16
SWA4570 Southwest Airlines 3 2026-06-17
SWA4450 - 3 2026-06-26
SWA4175 - 3 2026-06-30

Recent flights last 50

DateFlightRouteTakeoffLandingDuration
2026-07-26 SWA3095 LAS → OAK Jul 26, 20:55 UTCJul 26, 21:45 UTC50m
2026-07-26 SWA1183 LAS → SFO Jul 26, 17:25 UTCJul 26, 19:35 UTC2h 10m
2026-07-26 SWA487 ORD → DAL Jul 26, 14:25 UTCJul 26, 15:45 UTC1h 20m
2026-07-26 SWA487 ORD → DAL Jul 26, 14:21 UTCJul 26, 15:42 UTC1h 21m
2026-07-26 SWA2447 BWI → LAS Jul 26, 11:20 UTCJul 26, 13:00 UTC1h 40m
2026-07-26 SWA360 BOS → STL Jul 26, 00:25 UTCJul 26, 02:05 UTC1h 40m
2026-07-25 SWA360 BOS → STL Jul 25, 20:55 UTCJul 25, 23:10 UTC2h 15m
2026-07-25 SWA360 BOS → STL Jul 25, 20:53 UTCJul 25, 23:04 UTC2h 12m
2026-07-25 SWA2476 PHL → MDW Jul 25, 17:05 UTCJul 25, 19:45 UTC2h 40m
2026-07-25 SWA943 SJC → BNA Jul 25, 15:10 UTCJul 25, 16:05 UTC55m
2026-07-25 SWA3066 OAK → SAN Jul 25, 12:30 UTCJul 25, 14:05 UTC1h 35m
2026-07-25 SWA4042 OMA → PHX Jul 25, 03:40 UTCJul 25, 07:33 UTC3h 53m
2026-07-25 SWA4042 OMA → PHX Jul 25, 03:45 UTCJul 25, 07:35 UTC3h 50m
2026-07-24 SWA428 LAS → BUR Jul 24, 23:25 UTCJul 25, 01:25 UTC2h 0m
2026-07-24 SWA428 LAS → BUR Jul 24, 21:50 UTCJul 24, 22:40 UTC50m
2026-07-24 SWA1892 AUS → MSY Jul 24, 19:30 UTCJul 24, 20:40 UTC1h 10m
2026-07-24 SWA4849 ORD → BWI Jul 24, 17:10 UTCJul 24, 18:30 UTC1h 20m
2026-07-24 SWA4849 ORD → BWI Jul 24, 17:09 UTCJul 24, 18:23 UTC1h 14m
2026-07-24 SWA4009 DCA → MDW Jul 24, 13:55 UTCJul 24, 16:00 UTC2h 5m
2026-07-24 SWA4009 DCA → MDW Jul 24, 13:53 UTCJul 24, 15:56 UTC2h 3m
2026-07-24 SWA4929 BWI → LAX Jul 24, 11:15 UTCJul 24, 13:10 UTC1h 55m
2026-07-23 SWA3528 BUR → OAK Jul 23, 23:40 UTCJul 24, 03:45 UTC4h 5m
2026-07-23 SWA1139 AUS → FLL Jul 23, 20:18 UTCJul 23, 22:25 UTC2h 7m
2026-07-23 SWA1139 AUS → FLL Jul 23, 16:25 UTCJul 23, 22:30 UTC6h 5m
2026-07-23 SWA2723 PHX → MDW Jul 23, 12:15 UTCJul 23, 15:20 UTC3h 5m
2026-07-23 SWA1225 PHX → SJC Jul 23, 02:55 UTCJul 23, 04:50 UTC1h 55m
2026-07-22 SWA2334 SAN → SFO Jul 22, 22:10 UTCJul 23, 00:10 UTC2h 0m
2026-07-22 SWA2334 SAN → SFO Jul 22, 22:09 UTCJul 23, 00:12 UTC2h 3m
2026-07-22 SWA2334 SAN → SFO Jul 22, 19:50 UTCJul 22, 20:35 UTC45m
2026-07-22 SWA1328 LAX → SFO Jul 22, 17:45 UTCJul 22, 18:50 UTC1h 5m
2026-07-22 SWA1328 LAX → SFO Jul 22, 17:42 UTCJul 22, 18:44 UTC1h 2m
2026-07-22 SWA3014 BUR → SJC Jul 22, 15:50 UTCJul 22, 16:40 UTC50m
2026-07-22 SWA3014 BUR → SJC Jul 22, 11:15 UTCJul 22, 14:50 UTC3h 35m
2026-07-22 SWA3190 HOU → BNA Jul 22, 02:25 UTCJul 22, 05:20 UTC2h 55m
2026-07-22 SWA3190 HOU → BNA Jul 22, 02:20 UTCJul 22, 05:14 UTC2h 54m
2026-07-21 SWA3190 HOU → BNA Jul 21, 22:05 UTCJul 22, 00:55 UTC2h 50m
2026-07-21 SWA3190 HOU → BNA Jul 21, 15:05 UTCJul 21, 20:25 UTC5h 20m
2026-07-21 SWA1956 BUR → SJC Jul 21, 11:05 UTCJul 21, 13:05 UTC2h 0m
2026-07-21 SWA4405 BWI → MDW Jul 21, 02:35 UTCJul 21, 04:50 UTC2h 15m
2026-07-20 SWA4489 LAS → DAL Jul 20, 23:15 UTCJul 21, 01:40 UTC2h 24m
2026-07-20 SWA4278 SMF → LAS Jul 20, 20:22 UTCJul 20, 21:33 UTC1h 12m
2026-07-20 SWA4278 SMF → LAS Jul 20, 20:25 UTCJul 20, 21:40 UTC1h 15m
2026-07-20 SWA4007 OAK → LAS Jul 20, 18:00 UTCJul 20, 19:05 UTC1h 5m
2026-07-20 SWA4007 OAK → LAS Jul 20, 17:57 UTCJul 20, 19:01 UTC1h 4m
2026-07-20 SWA4135 - Jul 20, 15:15 UTCJul 20, 16:55 UTC1h 40m
2026-07-20 SWA4135 SAN → BOI Jul 20, 15:11 UTCJul 20, 16:50 UTC1h 39m
2026-07-20 SWA4806 LAS → MCI Jul 20, 12:55 UTCJul 20, 14:05 UTC1h 10m
2026-07-20 SWA1409 DAL → AMA Jul 20, 02:40 UTCJul 20, 05:30 UTC2h 50m
2026-07-19 SWA2615 DCA → AUS Jul 19, 22:40 UTCJul 20, 01:40 UTC3h 0m
2026-07-19 SWA2364 AUS → DCA Jul 19, 17:50 UTCJul 19, 21:10 UTC3h 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 N8898L page for operator, model, and routing details .

Mode-S AC42BF frequently asked

What is Mode-S code AC42BF?
AC42BF is an ICAO 24-bit transponder address. Allocated to United States. Assigned to N8898L.
Where is Mode-S AC42BF registered?
Mode-S code AC42BF 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 AC42BF broadcasting right now?
Yes. Mode-S AC42BF is currently airborne.
Hex, octal, and decimal Mode-S codes: what's the difference?
The same 24-bit identifier expressed in different bases: hex AC42BF, octal 53041277, decimal 11,289,279.
What flights does AC42BF operate?
Mode-S AC42BF has broadcast 20 distinct callsigns, including SWA2328, SWA745, SWA714, SWA2863, SWA2618.