Apparatus

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sensors Mode-S transponder

ABC0E4

ICAO 24-bit transponder address · allocated to United States

Currently assigned to N8566Z · BOEING 737-800 · operated by UMB BANK NA TRUSTEE

Hex
ABC0E4
Octal
52740344
Decimal
11,256,036
Country
US
Tail
N8566Z
Type
B738
No current signal · last broadcast 2h ago
Flights observed
682
Distinct callsigns
20
Country
US
Last broadcast
2h ago

Last known position

Most recent position reported by Mode-S ABC0E4.

Country allocation

The ICAO 24-bit address ABC0E4 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
SWA4055 Southwest Airlines 5 2026-05-04
SWA1122 Southwest Airlines 5 2026-06-10
SWA679 - 4 2026-06-28
SWA4539 - 4 2026-07-14
SWA4233 Southwest Airlines 4 2026-06-12
SWA3158 Southwest Airlines 4 2026-05-10
SWA174 Southwest Airlines 4 2026-05-27
SWA578 - 3 2026-07-04
SWA556 Southwest Airlines 3 2026-06-06
SWA553 Southwest Airlines 3 2026-06-19
SWA5047 Southwest Airlines 3 2026-07-03
SWA494 Southwest Airlines 3 2026-04-15
SWA4747 - 3 2026-07-10
SWA473 - 3 2026-06-27
SWA4017 Southwest Airlines 3 2026-05-07
SWA3726 Southwest Airlines 3 2026-06-14
SWA3722 - 3 2026-04-13
SWA3658 - 3 2026-06-15
SWA3437 Southwest Airlines 3 2026-05-17
SWA343 Southwest Airlines 3 2026-06-02

Recent flights last 50

DateFlightRouteTakeoffLandingDuration
2026-07-14 SWA5072 STL → DEN Jul 14, 18:50 UTCJul 14, 20:35 UTC1h 45m
2026-07-14 SWA5071 MCO → STL Jul 14, 15:45 UTCJul 14, 17:45 UTC2h 0m
2026-07-14 SWA5070 STL → MCO Jul 14, 12:45 UTCJul 14, 14:40 UTC1h 55m
2026-07-14 SWA4539 LAS → STL Jul 14, 02:50 UTCJul 14, 05:45 UTC2h 55m
2026-07-14 SWA4539 BOI → OAK Jul 14, 02:50 UTCJul 14, 05:47 UTC2h 57m
2026-07-14 SWA4539 - Jul 14, 00:25 UTCJul 14, 01:40 UTC1h 15m
2026-07-13 SWA4539 - Jul 13, 22:10 UTCJul 13, 23:35 UTC1h 25m
2026-07-13 SWA1491 - Jul 13, 19:35 UTCJul 13, 21:00 UTC1h 25m
2026-07-13 SWA1491 DEN → BOI Jul 13, 19:34 UTCJul 13, 20:57 UTC1h 23m
2026-07-13 SWA2944 - Jul 13, 15:35 UTCJul 13, 17:25 UTC1h 50m
2026-07-13 SWA2944 MKE → DEN Jul 13, 15:32 UTCJul 13, 17:21 UTC1h 50m
2026-07-13 SWA585 - Jul 13, 13:25 UTCJul 13, 14:35 UTC1h 10m
2026-07-13 SWA585 BNA → MKE Jul 13, 13:23 UTCJul 13, 14:34 UTC1h 11m
2026-07-13 SWA3349 - Jul 13, 11:15 UTCJul 13, 12:05 UTC50m
2026-07-13 SWA4435 - Jul 13, 03:10 UTCJul 13, 04:15 UTC1h 5m
2026-07-13 SWA4435 BWI → CVG Jul 13, 03:09 UTCJul 13, 04:10 UTC1h 1m
2026-07-13 SWA1697 - Jul 13, 00:05 UTCJul 13, 02:15 UTC2h 10m
2026-07-12 SWA4899 - Jul 12, 20:01 UTCJul 12, 22:30 UTC2h 30m
2026-07-12 SWA4673 - Jul 12, 17:55 UTCJul 12, 18:55 UTC1h 0m
2026-07-12 SWA1489 - Jul 12, 15:40 UTCJul 12, 16:45 UTC1h 5m
2026-07-12 SWA1489 BNA → PIT Jul 12, 15:36 UTCJul 12, 16:40 UTC1h 4m
2026-07-12 SWA4344 MSY → BNA Jul 12, 12:45 UTCJul 12, 14:15 UTC1h 30m
2026-07-12 SWA4344 MSY → BNA Jul 12, 12:42 UTCJul 12, 14:08 UTC1h 26m
2026-07-12 SWA1591 - Jul 12, 10:01 UTCJul 12, 11:25 UTC1h 25m
2026-07-12 SWA1591 FLL → MSY Jul 12, 09:57 UTCJul 12, 11:31 UTC1h 34m
2026-07-12 SWA1459 - Jul 12, 01:35 UTCJul 12, 02:15 UTC40m
2026-07-11 SWA4311 MSY → MCO Jul 11, 22:50 UTCJul 12, 00:15 UTC1h 25m
2026-07-11 SWA1643 - Jul 11, 19:30 UTCJul 11, 21:40 UTC2h 10m
2026-07-11 SWA3042 OAK → DEN Jul 11, 16:05 UTCJul 11, 18:05 UTC2h 0m
2026-07-11 SWA1650 - Jul 11, 05:25 UTCJul 11, 07:35 UTC2h 10m
2026-07-11 SWA3266 PHX → DEN Jul 11, 02:30 UTCJul 11, 03:55 UTC1h 25m
2026-07-10 SWA3266 - Jul 10, 23:55 UTCJul 11, 01:25 UTC1h 30m
2026-07-10 SWA443 GEG → SJC Jul 10, 20:50 UTCJul 10, 22:45 UTC1h 55m
2026-07-10 SWA302 OAK → ONT Jul 10, 18:20 UTCJul 10, 19:45 UTC1h 25m
2026-07-10 SWA4356 SAN → SMF Jul 10, 16:05 UTCJul 10, 17:15 UTC1h 10m
2026-07-10 SWA4356 - Jul 10, 16:10 UTCJul 10, 17:15 UTC1h 5m
2026-07-10 SWA3489 SJC → SAN Jul 10, 13:37 UTCJul 10, 14:42 UTC1h 5m
2026-07-10 SWA3489 SJC → SAN Jul 10, 13:40 UTCJul 10, 14:45 UTC1h 5m
2026-07-10 SWA2040 SEA → SJC Jul 10, 03:35 UTCJul 10, 05:15 UTC1h 40m
2026-07-10 SWA2040 SEA → SJC Jul 10, 03:33 UTCJul 10, 05:15 UTC1h 42m
2026-07-10 SWA4747 - Jul 10, 00:55 UTCJul 10, 02:30 UTC1h 35m
2026-07-10 SWA4747 OAK → SEA Jul 10, 00:53 UTCJul 10, 02:25 UTC1h 32m
2026-07-09 SWA4747 - Jul 9, 22:45 UTCJul 9, 23:35 UTC50m
2026-07-09 SWA4259 DEN → LGB Jul 9, 19:40 UTCJul 9, 21:45 UTC2h 5m
2026-07-09 SWA4259 DEN → LGB Jul 9, 19:40 UTCJul 9, 21:38 UTC1h 58m
2026-07-09 SWA4312 - Jul 9, 16:35 UTCJul 9, 18:25 UTC1h 50m
2026-07-09 SWA523 LGA → STL Jul 9, 13:25 UTCJul 9, 15:28 UTC2h 3m
2026-07-09 SWA523 LGA → STL Jul 9, 13:25 UTCJul 9, 15:30 UTC2h 5m
2026-07-09 SWA2801 - Jul 9, 10:35 UTCJul 9, 12:15 UTC1h 40m
2026-07-09 SWA4035 LAS → OMA Jul 9, 02:10 UTCJul 9, 04:20 UTC2h 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 N8566Z page for operator, model, and routing details .

Mode-S ABC0E4 frequently asked

What is Mode-S code ABC0E4?
ABC0E4 is an ICAO 24-bit transponder address. Allocated to United States. Assigned to N8566Z.
Where is Mode-S ABC0E4 registered?
Mode-S code ABC0E4 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 ABC0E4 broadcasting right now?
No active broadcast right now. Last signal was 2h ago.
Hex, octal, and decimal Mode-S codes: what's the difference?
The same 24-bit identifier expressed in different bases: hex ABC0E4, octal 52740344, decimal 11,256,036.
What flights does ABC0E4 operate?
Mode-S ABC0E4 has broadcast 20 distinct callsigns, including SWA4055, SWA1122, SWA679, SWA4539, SWA4233.