Apparatus

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sensors Mode-S transponder

ABC455

ICAO 24-bit transponder address · allocated to United States

Currently assigned to N8574Z · BOEING 737-800 · operated by BANK OF UTAH TRUSTEE

Hex
ABC455
Octal
52742125
Decimal
11,256,917
Country
US
Tail
N8574Z
Type
B738
No current signal · last broadcast 3h ago
Flights observed
617
Distinct callsigns
20
Country
US
Last broadcast
3h ago

Last known position

Most recent position reported by Mode-S ABC455.

Country allocation

The ICAO 24-bit address ABC455 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
SWA334 - 7 2026-07-13
SWA2569 - 5 2026-04-15
SWA436 - 4 2026-07-13
SWA4017 Southwest Airlines 4 2026-05-05
SWA2016 Southwest Airlines 4 2026-05-09
SWA191 - 4 2026-04-13
SWA1441 - 4 2026-06-19
SWA1193 - 4 2026-07-13
SWA54 - 3 2026-04-13
SWA4812 Southwest Airlines 3 2026-07-01
SWA479 Southwest Airlines 3 2026-05-01
SWA4444 - 3 2026-06-30
SWA4392 Southwest Airlines 3 2026-07-03
SWA4314 - 3 2026-04-14
SWA3919 Southwest Airlines 3 2026-04-20
SWA3884 - 3 2026-07-12
SWA3800 Southwest Airlines 3 2026-05-15
SWA3761 - 3 2026-07-05
SWA3578 Southwest Airlines 3 2026-04-15
SWA3543 Southwest Airlines 3 2026-06-25

Recent flights last 50

DateFlightRouteTakeoffLandingDuration
2026-07-14 SWA2647 - Jul 14, 23:50 UTCJul 15, 01:35 UTC1h 45m
2026-07-14 SWA4106 BOS → MDW Jul 14, 20:45 UTCJul 14, 22:45 UTC1h 59m
2026-07-14 SWA2704 - Jul 14, 15:30 UTCJul 14, 19:15 UTC3h 45m
2026-07-14 SWA2704 AUS → BOS Jul 14, 15:30 UTCJul 14, 19:36 UTC4h 6m
2026-07-14 SWA555 - Jul 14, 11:35 UTCJul 14, 14:20 UTC2h 45m
2026-07-14 SWA46 DAL → FLL Jul 14, 00:35 UTCJul 14, 03:10 UTC2h 35m
2026-07-14 SWA46 DAL → FLL Jul 14, 00:33 UTCJul 14, 03:05 UTC2h 32m
2026-07-13 SWA2354 DEN → DAL Jul 13, 18:10 UTCJul 13, 19:40 UTC1h 30m
2026-07-13 SWA436 - Jul 13, 14:35 UTCJul 13, 16:55 UTC2h 20m
2026-07-13 SWA436 - Jul 13, 12:15 UTCJul 13, 13:25 UTC1h 10m
2026-07-13 SWA1193 - Jul 13, 09:20 UTCJul 13, 11:00 UTC1h 40m
2026-07-13 SWA334 LAS → CMH Jul 13, 02:39 UTCJul 13, 06:17 UTC3h 38m
2026-07-13 SWA334 LAS → CMH Jul 13, 02:40 UTCJul 13, 06:20 UTC3h 40m
2026-07-13 SWA334 - Jul 13, 00:25 UTCJul 13, 01:10 UTC45m
2026-07-12 SWA334 - Jul 12, 20:25 UTCJul 12, 22:55 UTC2h 30m
2026-07-12 SWA2096 - Jul 12, 18:15 UTCJul 12, 19:10 UTC55m
2026-07-12 SWA570 - Jul 12, 16:15 UTCJul 12, 17:05 UTC50m
2026-07-12 SWA3884 - Jul 12, 13:40 UTCJul 12, 15:15 UTC1h 35m
2026-07-12 SWA1842 - Jul 12, 10:45 UTCJul 12, 12:30 UTC1h 45m
2026-07-11 SWA603 - Jul 11, 23:50 UTCJul 12, 00:45 UTC55m
2026-07-11 SWA2234 LAS → BNA Jul 11, 19:20 UTCJul 11, 22:35 UTC3h 15m
2026-07-11 SWA2234 LAS → BNA Jul 11, 19:16 UTCJul 11, 22:56 UTC3h 40m
2026-07-11 SWA2234 SPQ → LAS Jul 11, 17:05 UTCJul 11, 17:50 UTC45m
2026-07-11 SWA1199 BZN → LGB Jul 11, 13:40 UTCJul 11, 15:49 UTC2h 9m
2026-07-11 SWA1199 DEN → LGB Jul 11, 05:05 UTCJul 11, 15:55 UTC10h 50m
2026-07-11 SWA3198 PDX → DEN Jul 11, 01:15 UTCJul 11, 03:10 UTC1h 55m
2026-07-10 SWA2126 LAS → PDX Jul 10, 22:20 UTCJul 11, 00:15 UTC1h 55m
2026-07-10 SWA2126 - Jul 10, 17:20 UTCJul 10, 20:40 UTC3h 20m
2026-07-10 SWA537 BNA → IND Jul 10, 15:30 UTCJul 10, 16:20 UTC50m
2026-07-10 SWA3107 OKC → BNA Jul 10, 12:45 UTCJul 10, 14:15 UTC1h 30m
2026-07-10 SWA3107 OKC → BNA Jul 10, 12:44 UTCJul 10, 14:07 UTC1h 23m
2026-07-10 SWA4641 - Jul 10, 04:10 UTCJul 10, 05:10 UTC1h 0m
2026-07-10 SWA4641 HOU → OKC Jul 10, 04:05 UTCJul 10, 05:01 UTC56m
2026-07-10 SWA3988 - Jul 10, 01:15 UTCJul 10, 02:35 UTC1h 20m
2026-07-09 SWA3988 - Jul 9, 22:45 UTCJul 10, 00:15 UTC1h 30m
2026-07-09 SWA3880 - Jul 9, 19:55 UTCJul 9, 21:55 UTC2h 0m
2026-07-09 SWA3880 SRQ → STL Jul 9, 19:53 UTCJul 9, 21:51 UTC1h 58m
2026-07-09 SWA677 BNA → SRQ Jul 9, 17:20 UTCJul 9, 19:00 UTC1h 40m
2026-07-09 SWA2997 - Jul 9, 15:00 UTCJul 9, 16:10 UTC1h 10m
2026-07-09 SWA2997 MYR → BNA Jul 9, 14:50 UTCJul 9, 16:01 UTC1h 11m
2026-07-09 SWA2997 - Jul 9, 12:45 UTCJul 9, 13:40 UTC55m
2026-07-09 SWA420 - Jul 9, 09:55 UTCJul 9, 10:55 UTC1h 0m
2026-07-09 SWA1593 MDW → BDL Jul 9, 00:00 UTCJul 9, 01:40 UTC1h 40m
2026-07-09 SWA1593 MDW → BDL Jul 9, 00:00 UTCJul 9, 01:37 UTC1h 37m
2026-07-08 SWA3112 PHL → MDW Jul 8, 21:10 UTCJul 8, 22:45 UTC1h 35m
2026-07-08 SWA3112 PHL → MDW Jul 8, 21:06 UTCJul 8, 22:38 UTC1h 33m
2026-07-08 SWA3157 - Jul 8, 16:45 UTCJul 8, 19:55 UTC3h 10m
2026-07-08 SWA2943 - Jul 8, 13:20 UTCJul 8, 15:15 UTC1h 55m
2026-07-08 SWA2943 LAX → DEN Jul 8, 13:20 UTCJul 8, 15:11 UTC1h 51m
2026-07-08 SWA2625 - Jul 8, 03:15 UTCJul 8, 04:00 UTC45m

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 N8574Z page for operator, model, and routing details .

Mode-S ABC455 frequently asked

What is Mode-S code ABC455?
ABC455 is an ICAO 24-bit transponder address. Allocated to United States. Assigned to N8574Z.
Where is Mode-S ABC455 registered?
Mode-S code ABC455 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 ABC455 broadcasting right now?
No active broadcast right now. Last signal was 3h ago.
Hex, octal, and decimal Mode-S codes: what's the difference?
The same 24-bit identifier expressed in different bases: hex ABC455, octal 52742125, decimal 11,256,917.
What flights does ABC455 operate?
Mode-S ABC455 has broadcast 20 distinct callsigns, including SWA334, SWA2569, SWA436, SWA4017, SWA2016.