Apparatus

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sensors Mode-S transponder

ABBCA1

ICAO 24-bit transponder address · allocated to United States

Currently assigned to N8552Z · BOEING 737-800 · operated by SOUTHWEST AIRLINES CO

Hex
ABBCA1
Octal
52736241
Decimal
11,254,945
Country
US
Tail
N8552Z
Type
B738
No current signal · last broadcast Jul 26, 21:10 UTC
Flights observed
674
Distinct callsigns
20
Country
US
Last broadcast
Jul 26, 21:10 UTC

Last known position

Most recent position reported by Mode-S ABBCA1.

Country allocation

The ICAO 24-bit address ABBCA1 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
SWA52 Southwest Airlines 5 2026-07-25
SWA4611 Southwest Airlines 5 2026-06-27
SWA3428 - 5 2026-06-25
SWA906 - 4 2026-07-12
SWA765 - 4 2026-07-03
SWA4047 Southwest Airlines 4 2026-06-10
SWA2749 - 4 2026-06-25
SWA2130 Southwest Airlines 4 2026-04-17
SWA995 Southwest Airlines 3 2026-07-25
SWA982 - 3 2026-07-18
SWA742 - 3 2026-07-11
SWA642 - 3 2026-07-01
SWA4938 Southwest Airlines 3 2026-07-02
SWA4392 - 3 2026-07-06
SWA4177 Southwest Airlines 3 2026-06-10
SWA3807 Southwest Airlines 3 2026-05-26
SWA3717 - 3 2026-07-15
SWA3566 Southwest Airlines 3 2026-06-19
SWA3163 Southwest Airlines 3 2026-07-26
SWA3027 Southwest Airlines 3 2026-06-16

Recent flights last 50

DateFlightRouteTakeoffLandingDuration
2026-07-26 SWA2401 SAN → SJC Jul 26, 18:10 UTCJul 26, 21:05 UTC2h 55m
2026-07-26 SWA3163 GSP → ATL Jul 26, 15:25 UTCJul 26, 16:20 UTC55m
2026-07-26 SWA3163 GSP → ATL Jul 26, 15:25 UTCJul 26, 16:45 UTC1h 20m
2026-07-26 SWA3163 GSP → ATL Jul 26, 10:15 UTCJul 26, 14:15 UTC4h 0m
2026-07-26 SWA3408 MSY → HOU Jul 26, 01:25 UTCJul 26, 02:35 UTC1h 10m
2026-07-26 SWA3408 MSY → HOU Jul 26, 01:24 UTCJul 26, 02:34 UTC1h 10m
2026-07-25 SWA2692 AUS → MIA Jul 25, 14:20 UTCJul 25, 23:15 UTC8h 55m
2026-07-25 SWA995 MDW → SDF Jul 25, 10:45 UTCJul 25, 12:15 UTC1h 30m
2026-07-25 SWA52 DAL → OAK Jul 25, 02:45 UTCJul 25, 05:10 UTC2h 25m
2026-07-25 SWA52 DAL → OAK Jul 25, 02:42 UTCJul 25, 05:08 UTC2h 26m
2026-07-24 SWA2221 BWI → ALB Jul 24, 03:35 UTCJul 24, 05:50 UTC2h 15m
2026-07-24 SWA2221 BWI → ALB Jul 24, 03:30 UTCJul 24, 05:52 UTC2h 22m
2026-07-24 SWA2404 SAN → OAK Jul 24, 01:45 UTCJul 24, 02:30 UTC45m
2026-07-23 SWA3004 MSY → MDW Jul 23, 20:50 UTCJul 24, 00:15 UTC3h 25m
2026-07-23 SWA3004 MSY → MDW Jul 23, 18:20 UTCJul 23, 19:40 UTC1h 20m
2026-07-23 SWA3947 STL → MCO Jul 23, 15:30 UTCJul 23, 17:20 UTC1h 50m
2026-07-23 SWA3947 STL → MCO Jul 23, 15:29 UTCJul 23, 17:15 UTC1h 46m
2026-07-23 SWA274 ELP → DAL Jul 23, 12:45 UTCJul 23, 14:05 UTC1h 20m
2026-07-23 SWA274 ELP → DAL Jul 23, 10:55 UTCJul 23, 11:35 UTC40m
2026-07-23 SWA775 AUS → OAK Jul 23, 04:20 UTCJul 23, 06:25 UTC2h 5m
2026-07-23 SWA4120 LAS → SAN Jul 23, 00:10 UTCJul 23, 02:50 UTC2h 40m
2026-07-22 SWA4334 PVD → MCO Jul 22, 19:35 UTCJul 22, 23:05 UTC3h 30m
2026-07-22 SWA2992 DEN → LGA Jul 22, 16:05 UTCJul 22, 18:20 UTC2h 15m
2026-07-22 SWA4780 BWI → MHT Jul 22, 13:55 UTCJul 22, 15:15 UTC1h 20m
2026-07-22 SWA3937 MSY → MCI Jul 22, 11:20 UTCJul 22, 12:10 UTC50m
2026-07-21 SWA8516 SJC → LAS Jul 21, 22:55 UTCJul 21, 23:40 UTC45m
2026-07-21 SWA8516 SJC → LAS Jul 21, 22:51 UTCJul 21, 23:38 UTC47m
2026-07-21 SWA4349 BUR → SFO Jul 21, 16:20 UTCJul 21, 18:35 UTC2h 15m
2026-07-21 SWA2379 TPA → ALB Jul 21, 12:25 UTCJul 21, 15:05 UTC2h 40m
2026-07-21 SWA3364 PVD → BWI Jul 21, 03:25 UTCJul 21, 07:05 UTC3h 40m
2026-07-21 SWA3441 MCO → MHT Jul 21, 00:20 UTCJul 21, 01:55 UTC1h 35m
2026-07-21 SWA3441 MCO → MHT Jul 21, 00:19 UTCJul 21, 01:50 UTC1h 31m
2026-07-20 SWA1693 ABQ → HOU Jul 20, 20:25 UTCJul 20, 23:15 UTC2h 50m
2026-07-20 SWA392 BUR → SJC Jul 20, 14:40 UTCJul 20, 19:05 UTC4h 25m
2026-07-20 SWA392 BUR → SJC Jul 20, 11:30 UTCJul 20, 13:30 UTC2h 0m
2026-07-20 SWA4641 - Jul 20, 04:20 UTCJul 20, 05:15 UTC55m
2026-07-20 SWA3631 PHL → DEN Jul 20, 01:25 UTCJul 20, 02:40 UTC1h 15m
2026-07-19 SWA1421 BWI → BDL Jul 19, 23:00 UTCJul 20, 00:20 UTC1h 20m
2026-07-19 SWA1421 BWI → BDL Jul 19, 20:20 UTCJul 19, 22:00 UTC1h 40m
2026-07-19 SWA4178 - Jul 19, 17:05 UTCJul 19, 18:45 UTC1h 40m
2026-07-19 SWA2689 DEN → RNO Jul 19, 14:13 UTCJul 19, 16:00 UTC1h 47m
2026-07-19 SWA2689 - Jul 19, 14:15 UTCJul 19, 16:00 UTC1h 45m
2026-07-19 SWA950 IND → PHX Jul 19, 09:30 UTCJul 19, 12:40 UTC3h 10m
2026-07-19 SWA950 IND → PHX Jul 19, 09:30 UTCJul 19, 12:30 UTC3h 0m
2026-07-19 SWA161 - Jul 19, 02:30 UTCJul 19, 03:20 UTC50m
2026-07-19 SWA161 BWI → RDU Jul 19, 02:29 UTCJul 19, 03:16 UTC47m
2026-07-18 SWA4148 MDW → FLL Jul 18, 20:11 UTCJul 19, 01:09 UTC4h 58m
2026-07-18 SWA4148 MDW → FLL Jul 18, 20:15 UTCJul 19, 01:20 UTC5h 5m
2026-07-18 SWA4648 - Jul 18, 15:35 UTCJul 18, 19:05 UTC3h 30m
2026-07-18 SWA982 - Jul 18, 12:45 UTCJul 18, 14:00 UTC1h 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 N8552Z page for operator, model, and routing details .

Mode-S ABBCA1 frequently asked

What is Mode-S code ABBCA1?
ABBCA1 is an ICAO 24-bit transponder address. Allocated to United States. Assigned to N8552Z.
Where is Mode-S ABBCA1 registered?
Mode-S code ABBCA1 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 ABBCA1 broadcasting right now?
No active broadcast right now. Last signal was Jul 26, 21:10 UTC.
Hex, octal, and decimal Mode-S codes: what's the difference?
The same 24-bit identifier expressed in different bases: hex ABBCA1, octal 52736241, decimal 11,254,945.
What flights does ABBCA1 operate?
Mode-S ABBCA1 has broadcast 20 distinct callsigns, including SWA52, SWA4611, SWA3428, SWA906, SWA765.