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sensors Mode-S transponder

ABBD2D

ICAO 24-bit transponder address · allocated to United States

Currently assigned to N8556Z · BOEING 737-800 · operated by SOUTHWEST AIRLINES CO

Hex
ABBD2D
Octal
52736455
Decimal
11,255,085
Country
US
Tail
N8556Z
Type
B738
No current signal · last broadcast 14m ago
Flights observed
580
Distinct callsigns
20
Country
US
Last broadcast
14m ago

Last known position

Most recent position reported by Mode-S ABBD2D.

Country allocation

The ICAO 24-bit address ABBD2D 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
SWA946 - 5 2026-06-15
SWA2192 - 5 2026-06-16
SWA947 Southwest Airlines 4 2026-06-03
SWA734 - 4 2026-06-29
SWA409 Southwest Airlines 4 2026-06-12
SWA3563 - 4 2026-06-20
SWA2876 - 4 2026-07-14
SWA2844 - 4 2026-06-30
SWA2708 Southwest Airlines 4 2026-04-15
SWA2214 - 4 2026-06-30
SWA873 Southwest Airlines 3 2026-06-07
SWA4632 Southwest Airlines 3 2026-06-16
SWA4605 Southwest Airlines 3 2026-04-18
SWA4428 Southwest Airlines 3 2026-06-05
SWA427 - 3 2026-07-13
SWA4127 - 3 2026-06-28
SWA4047 - 3 2026-07-13
SWA3484 Southwest Airlines 3 2026-04-16
SWA3389 Southwest Airlines 3 2026-06-13
SWA3327 Southwest Airlines 3 2026-04-14

Recent flights last 50

DateFlightRouteTakeoffLandingDuration
2026-07-14 SWA3580 LAS → CMH Jul 14, 17:30 UTCJul 14, 21:15 UTC3h 45m
2026-07-14 SWA3580 ONT → LAS Jul 14, 15:35 UTCJul 14, 16:20 UTC45m
2026-07-14 SWA4879 SJC → ONT Jul 14, 13:35 UTCJul 14, 14:30 UTC55m
2026-07-14 SWA2500 LGB → SJC Jul 14, 02:55 UTCJul 14, 03:45 UTC50m
2026-07-14 SWA2876 - Jul 14, 00:50 UTCJul 14, 01:55 UTC1h 5m
2026-07-13 SWA2876 - Jul 13, 20:05 UTCJul 13, 22:55 UTC2h 50m
2026-07-13 SWA427 - Jul 13, 16:45 UTCJul 13, 18:35 UTC1h 50m
2026-07-13 SWA427 - Jul 13, 15:00 UTCJul 13, 15:50 UTC50m
2026-07-13 SWA3717 - Jul 13, 11:35 UTCJul 13, 13:20 UTC1h 45m
2026-07-13 SWA3717 - Jul 13, 09:50 UTCJul 13, 10:00 UTC10m
2026-07-13 SWA4047 - Jul 13, 05:01 UTCJul 13, 05:10 UTC10m
2026-07-13 SWA4047 - Jul 13, 02:25 UTCJul 13, 03:20 UTC55m
2026-07-13 SWA4047 TPA → SJU Jul 13, 02:22 UTCJul 13, 05:06 UTC2h 44m
2026-07-12 SWA1291 DAL → TPA Jul 12, 22:50 UTCJul 13, 00:55 UTC2h 5m
2026-07-12 SWA1291 DAL → TPA Jul 12, 22:47 UTCJul 13, 00:56 UTC2h 9m
2026-07-12 SWA3597 - Jul 12, 20:25 UTCJul 12, 21:15 UTC50m
2026-07-12 SWA3597 STL → DAL Jul 12, 20:24 UTCJul 12, 21:38 UTC1h 14m
2026-07-12 SWA2902 - Jul 12, 18:20 UTCJul 12, 19:05 UTC45m
2026-07-12 SWA2902 MDW → STL Jul 12, 18:20 UTCJul 12, 19:04 UTC45m
2026-07-12 SWA4573 LGA → MDW Jul 12, 15:20 UTCJul 12, 17:01 UTC1h 40m
2026-07-12 SWA2013 - Jul 12, 11:01 UTCJul 12, 13:55 UTC2h 55m
2026-07-12 SWA4052 - Jul 12, 02:40 UTCJul 12, 04:25 UTC1h 45m
2026-07-11 SWA931 - Jul 11, 23:35 UTCJul 12, 01:25 UTC1h 50m
2026-07-11 SWA2301 - Jul 11, 20:40 UTCJul 11, 22:45 UTC2h 5m
2026-07-11 SWA2301 SRQ → PIT Jul 11, 20:37 UTCJul 11, 22:43 UTC2h 6m
2026-07-11 SWA2301 - Jul 11, 17:50 UTCJul 11, 19:50 UTC2h 0m
2026-07-11 SWA510 - Jul 11, 15:00 UTCJul 11, 16:40 UTC1h 40m
2026-07-11 SWA1406 - Jul 11, 12:30 UTCJul 11, 13:55 UTC1h 25m
2026-07-11 SWA2388 LAX → DAL Jul 11, 02:10 UTCJul 11, 04:55 UTC2h 45m
2026-07-11 SWA2388 PHX → LAX Jul 11, 00:20 UTCJul 11, 01:20 UTC1h 0m
2026-07-10 SWA3304 - Jul 10, 20:45 UTCJul 10, 22:45 UTC2h 0m
2026-07-10 SWA126 - Jul 10, 16:40 UTCJul 10, 18:25 UTC1h 45m
2026-07-10 SWA126 ABQ → HOU Jul 10, 16:38 UTCJul 10, 18:25 UTC1h 47m
2026-07-10 SWA4943 - Jul 10, 14:10 UTCJul 10, 15:40 UTC1h 30m
2026-07-10 SWA4943 LAX → ABQ Jul 10, 14:10 UTCJul 10, 15:37 UTC1h 27m
2026-07-10 SWA332 - Jul 10, 10:15 UTCJul 10, 12:55 UTC2h 40m
2026-07-10 SWA2600 - Jul 10, 03:05 UTCJul 10, 05:20 UTC2h 15m
2026-07-10 SWA3431 - Jul 10, 00:45 UTCJul 10, 02:10 UTC1h 25m
2026-07-09 SWA1071 BWI → RDU Jul 9, 23:00 UTCJul 9, 23:50 UTC50m
2026-07-09 SWA1071 BWI → RDU Jul 9, 23:00 UTCJul 9, 23:43 UTC43m
2026-07-09 SWA267 - Jul 9, 16:50 UTCJul 9, 20:00 UTC3h 10m
2026-07-09 SWA4548 - Jul 9, 12:40 UTCJul 9, 14:35 UTC1h 55m
2026-07-09 SWA1315 DEN → PHX Jul 9, 04:28 UTCJul 9, 05:50 UTC1h 22m
2026-07-09 SWA1315 DEN → PHX Jul 9, 04:30 UTCJul 9, 05:55 UTC1h 25m
2026-07-09 SWA1256 - Jul 9, 00:30 UTCJul 9, 02:40 UTC2h 10m
2026-07-09 SWA1256 OMA → DEN Jul 9, 00:26 UTCJul 9, 02:36 UTC2h 11m
2026-07-08 SWA1256 - Jul 8, 19:45 UTCJul 8, 22:45 UTC3h 0m
2026-07-08 SWA160 - Jul 8, 17:10 UTCJul 8, 18:35 UTC1h 25m
2026-07-08 SWA3228 PHX → ABQ Jul 8, 15:15 UTCJul 8, 16:05 UTC50m
2026-07-07 SWA3703 - Jul 7, 18:20 UTCJul 7, 19:15 UTC55m

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 N8556Z page for operator, model, and routing details .

Mode-S ABBD2D frequently asked

What is Mode-S code ABBD2D?
ABBD2D is an ICAO 24-bit transponder address. Allocated to United States. Assigned to N8556Z.
Where is Mode-S ABBD2D registered?
Mode-S code ABBD2D 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 ABBD2D broadcasting right now?
No active broadcast right now. Last signal was 14m ago.
Hex, octal, and decimal Mode-S codes: what's the difference?
The same 24-bit identifier expressed in different bases: hex ABBD2D, octal 52736455, decimal 11,255,085.
What flights does ABBD2D operate?
Mode-S ABBD2D has broadcast 20 distinct callsigns, including SWA946, SWA2192, SWA947, SWA734, SWA409.