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 Jul 26, 23:00 UTC
Flights observed
778
Distinct callsigns
20
Country
US
Last broadcast
Jul 26, 23:00 UTC

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
SWA553 - 4 2026-07-20
SWA4539 - 4 2026-07-14
SWA4233 Southwest Airlines 4 2026-06-12
SWA3847 - 4 2026-07-19
SWA3158 Southwest Airlines 4 2026-05-10
SWA2992 Southwest Airlines 4 2026-07-20
SWA174 Southwest Airlines 4 2026-05-27
SWA1628 - 4 2026-07-15
SWA578 - 3 2026-07-04
SWA56 Southwest Airlines 3 2026-07-19
SWA556 Southwest Airlines 3 2026-06-06
SWA5047 Southwest Airlines 3 2026-07-03
SWA494 Southwest Airlines 3 2026-04-15
SWA4780 Southwest Airlines 3 2026-07-20
SWA4747 - 3 2026-07-10
SWA473 - 3 2026-06-27
SWA4684 Southwest Airlines 3 2026-07-21

Recent flights last 50

DateFlightRouteTakeoffLandingDuration
2026-07-26 SWA939 PHX → AUS Jul 26, 22:00 UTCJul 26, 23:00 UTC1h 0m
2026-07-26 SWA2729 BWI → BUF Jul 26, 19:30 UTCJul 26, 20:45 UTC1h 15m
2026-07-26 SWA3186 DCA → PVD Jul 26, 15:10 UTCJul 26, 18:20 UTC3h 10m
2026-07-26 SWA4201 SNA → AUS Jul 26, 11:55 UTCJul 26, 13:40 UTC1h 45m
2026-07-26 SWA4641 EUG → OAK Jul 26, 02:45 UTCJul 26, 03:40 UTC55m
2026-07-25 SWA2460 DEN → OKC Jul 25, 22:21 UTCJul 26, 01:35 UTC3h 14m
2026-07-25 SWA2460 DEN → OKC Jul 25, 22:25 UTCJul 26, 01:35 UTC3h 10m
2026-07-25 SWA1966 TUS → HOU Jul 25, 18:50 UTCJul 25, 20:45 UTC1h 55m
2026-07-25 SWA1966 TUS → HOU Jul 25, 18:48 UTCJul 25, 20:46 UTC1h 59m
2026-07-25 SWA2156 PHL → MDW Jul 25, 16:05 UTCJul 25, 17:15 UTC1h 10m
2026-07-25 SWA2156 PHL → MDW Jul 25, 16:01 UTCJul 25, 17:10 UTC1h 9m
2026-07-25 SWA4499 BWI → BOS Jul 25, 13:05 UTCJul 25, 14:50 UTC1h 45m
2026-07-25 SWA4499 BWI → BOS Jul 25, 13:01 UTCJul 25, 14:47 UTC1h 46m
2026-07-25 SWA3153 BWI → CVG Jul 25, 07:20 UTCJul 25, 10:40 UTC3h 20m
2026-07-25 SWA3692 BNA → VPS Jul 25, 04:00 UTCJul 25, 04:50 UTC50m
2026-07-25 SWA4185 MSY → DAL Jul 25, 02:05 UTCJul 25, 03:00 UTC55m
2026-07-24 SWA1088 MSY → LGA Jul 24, 20:10 UTCJul 25, 01:00 UTC4h 50m
2026-07-24 SWA1088 MSY → LGA Jul 24, 20:07 UTCJul 25, 00:48 UTC4h 41m
2026-07-24 SWA3458 LAX → SFO Jul 24, 17:55 UTCJul 24, 18:45 UTC50m
2026-07-24 SWA2802 BWI → SYR Jul 24, 15:35 UTCJul 24, 16:25 UTC50m
2026-07-24 SWA3735 PVD → MDW Jul 24, 06:40 UTCJul 24, 10:10 UTC3h 30m
2026-07-24 SWA3735 PVD → MDW Jul 24, 06:37 UTCJul 24, 10:05 UTC3h 28m
2026-07-24 SWA4633 HOU → TPA Jul 24, 03:15 UTCJul 24, 05:35 UTC2h 20m
2026-07-23 SWA4306 BWI → MDW Jul 23, 22:55 UTCJul 24, 01:50 UTC2h 55m
2026-07-23 SWA4306 BWI → MDW Jul 23, 22:51 UTCJul 24, 01:44 UTC2h 54m
2026-07-23 SWA3512 SJC → LAX Jul 23, 20:40 UTCJul 23, 21:45 UTC1h 5m
2026-07-23 SWA4954 SAN → RNO Jul 23, 18:10 UTCJul 23, 19:15 UTC1h 5m
2026-07-23 SWA4954 - Jul 23, 18:10 UTCJul 23, 19:15 UTC1h 5m
2026-07-23 SWA1699 RDU → DAL Jul 23, 15:00 UTCJul 23, 16:50 UTC1h 50m
2026-07-23 SWA2114 ATL → DEN Jul 23, 10:50 UTCJul 23, 13:25 UTC2h 35m
2026-07-23 SWA1542 DEN → OAK Jul 23, 02:00 UTCJul 23, 03:40 UTC1h 40m
2026-07-23 SWA1542 DEN → OAK Jul 23, 01:58 UTCJul 23, 03:38 UTC1h 41m
2026-07-22 SWA1542 DEN → OAK Jul 22, 21:55 UTCJul 23, 00:45 UTC2h 50m
2026-07-22 SWA2655 DAL → LGA Jul 22, 19:34 UTCJul 22, 20:47 UTC1h 13m
2026-07-22 SWA2655 DAL → LGA Jul 22, 19:35 UTCJul 22, 20:45 UTC1h 10m
2026-07-22 SWA2140 MDW → DCA Jul 22, 17:15 UTCJul 22, 18:15 UTC1h 0m
2026-07-22 SWA2140 MDW → DCA Jul 22, 17:12 UTCJul 22, 18:12 UTC1h 1m
2026-07-22 SWA2100 - Jul 22, 15:15 UTCJul 22, 16:10 UTC55m
2026-07-22 SWA2578 LAS → PHX Jul 22, 11:30 UTCJul 22, 13:25 UTC1h 55m
2026-07-22 SWA2578 LAS → PHX Jul 22, 11:05 UTCJul 22, 13:20 UTC2h 15m
2026-07-22 SWA1409 DAL → AMA Jul 22, 01:00 UTCJul 22, 03:25 UTC2h 25m
2026-07-22 SWA1409 DAL → AMA Jul 22, 00:59 UTCJul 22, 03:20 UTC2h 21m
2026-07-21 SWA4397 - Jul 21, 19:50 UTCJul 21, 23:10 UTC3h 20m
2026-07-21 SWA2275 DEN → AUS Jul 21, 16:40 UTCJul 21, 18:35 UTC1h 55m
2026-07-21 SWA2454 BUR → SLC Jul 21, 11:20 UTCJul 21, 15:05 UTC3h 45m
2026-07-21 SWA4684 DEN → SFO Jul 21, 01:50 UTCJul 21, 03:45 UTC1h 55m
2026-07-21 SWA4684 DEN → SFO Jul 21, 01:47 UTCJul 21, 03:35 UTC1h 48m
2026-07-20 SWA4684 DEN → SFO Jul 20, 23:05 UTCJul 21, 00:45 UTC1h 39m
2026-07-20 SWA553 DEN → AUS Jul 20, 20:05 UTCJul 20, 21:55 UTC1h 50m
2026-07-20 SWA2992 DEN → LGA Jul 20, 16:05 UTCJul 20, 18:20 UTC2h 15m

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 Jul 26, 23:00 UTC.
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, SWA553, SWA4539.