Apparatus

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sensors Mode-S transponder

ABBD0A

ICAO 24-bit transponder address · allocated to United States

Currently assigned to N8555Z · BOEING 737-800 · operated by SOUTHWEST AIRLINES CO

Hex
ABBD0A
Octal
52736412
Decimal
11,255,050
Country
US
Tail
N8555Z
Type
B738
Broadcasting now · callsign SWA2355 · 35,000 ft
Flights observed
722
Distinct callsigns
20
Country
US
Last broadcast
Jul 26, 22:30 UTC

Current position

ABBD0A is currently broadcasting. Map zoomed to live position.

Country allocation

The ICAO 24-bit address ABBD0A 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
SWA4450 - 6 2026-07-03
SWA1143 - 6 2026-06-26
SWA719 - 5 2026-04-13
SWA701 Southwest Airlines 4 2026-06-13
SWA553 Southwest Airlines 4 2026-06-11
SWA485 Southwest Airlines 4 2026-06-04
SWA4367 - 4 2026-06-26
SWA3484 Southwest Airlines 4 2026-04-29
SWA1558 Southwest Airlines 4 2026-06-03
SWA1349 Southwest Airlines 4 2026-06-11
SWA898 - 3 2026-06-26
SWA753 - 3 2026-06-15
SWA752 Southwest Airlines 3 2026-04-25
SWA597 Southwest Airlines 3 2026-05-12
SWA579 Southwest Airlines 3 2026-06-09
SWA4806 Southwest Airlines 3 2026-07-22
SWA4241 Southwest Airlines 3 2026-06-27
SWA423 - 3 2026-06-26
SWA4033 - 3 2026-07-03
SWA3976 - 3 2026-06-17

Recent flights last 50

DateFlightRouteTakeoffLandingDuration
2026-07-26 SWA2518 BWI → ALB Jul 26, 21:00 UTCJul 26, 22:30 UTC1h 30m
2026-07-26 SWA1546 PVD → TPA Jul 26, 15:25 UTCJul 26, 19:25 UTC4h 0m
2026-07-26 SWA745 SJC → SEA Jul 26, 11:30 UTCJul 26, 13:40 UTC2h 10m
2026-07-26 SWA745 SJC → SEA Jul 26, 11:30 UTCJul 26, 13:33 UTC2h 3m
2026-07-25 SWA4930 MHT → TPA Jul 25, 21:50 UTCJul 26, 02:55 UTC5h 5m
2026-07-25 SWA458 SJC → SAN Jul 25, 19:55 UTCJul 25, 20:40 UTC45m
2026-07-25 SWA1295 SEA → SJC Jul 25, 16:30 UTCJul 25, 17:40 UTC1h 10m
2026-07-25 SWA3977 MSY → HOU Jul 25, 14:20 UTCJul 25, 15:20 UTC1h 0m
2026-07-25 SWA1823 MCO → MKE Jul 25, 04:03 UTCJul 25, 05:26 UTC1h 23m
2026-07-25 SWA1530 SRQ → DAL Jul 25, 00:10 UTCJul 25, 05:25 UTC5h 15m
2026-07-24 SWA1893 MDW → BDL Jul 24, 20:50 UTCJul 24, 23:05 UTC2h 15m
2026-07-24 SWA1893 MDW → BDL Jul 24, 20:46 UTCJul 24, 22:59 UTC2h 13m
2026-07-24 SWA1893 MDW → BDL Jul 24, 19:15 UTCJul 24, 19:45 UTC30m
2026-07-24 SWA4573 BWI → SYR Jul 24, 16:00 UTCJul 24, 18:00 UTC2h 0m
2026-07-24 SWA2013 BUR → OAK Jul 24, 11:25 UTCJul 24, 14:35 UTC3h 10m
2026-07-23 SWA3225 PHX → MDW Jul 23, 22:00 UTCJul 24, 01:00 UTC3h 0m
2026-07-23 SWA4235 BNA → LGA Jul 23, 19:35 UTCJul 23, 20:30 UTC55m
2026-07-23 SWA2427 SYR → BWI Jul 23, 17:25 UTCJul 23, 18:25 UTC1h 0m
2026-07-23 SWA2427 SYR → BWI Jul 23, 17:24 UTCJul 23, 18:20 UTC56m
2026-07-23 SWA2427 SYR → BWI Jul 23, 15:05 UTCJul 23, 16:00 UTC55m
2026-07-23 SWA1379 DAL → PHX Jul 23, 11:10 UTCJul 23, 13:10 UTC2h 0m
2026-07-23 SWA1436 SJC → ONT Jul 23, 02:25 UTCJul 23, 04:25 UTC2h 0m
2026-07-23 SWA1436 SJC → ONT Jul 23, 02:24 UTCJul 23, 04:27 UTC2h 3m
2026-07-22 SWA4426 DEN → BOS Jul 22, 23:45 UTCJul 23, 01:35 UTC1h 50m
2026-07-22 SWA769 MHT → MCO Jul 22, 19:20 UTCJul 22, 22:00 UTC2h 40m
2026-07-22 SWA769 MHT → MCO Jul 22, 19:17 UTCJul 22, 21:50 UTC2h 33m
2026-07-22 SWA4958 LGA → BNA Jul 22, 17:32 UTCJul 22, 18:27 UTC55m
2026-07-22 SWA4958 LGA → BNA Jul 22, 17:35 UTCJul 22, 18:30 UTC55m
2026-07-22 SWA3537 - Jul 22, 15:45 UTCJul 22, 16:40 UTC55m
2026-07-22 SWA4806 LAS → MCI Jul 22, 13:35 UTCJul 22, 14:50 UTC1h 15m
2026-07-22 SWA29 HOU → IND Jul 22, 05:00 UTCJul 22, 05:25 UTC25m
2026-07-22 SWA4285 BWI → SJU Jul 22, 02:10 UTCJul 22, 03:40 UTC1h 30m
2026-07-21 SWA1166 MCI → LGA Jul 21, 23:45 UTCJul 22, 01:20 UTC1h 35m
2026-07-21 SWA1166 MCI → LGA Jul 21, 23:45 UTCJul 22, 01:17 UTC1h 32m
2026-07-21 SWA1166 MCI → LGA Jul 21, 21:10 UTCJul 21, 22:40 UTC1h 30m
2026-07-21 SWA2548 SEA → OAK Jul 21, 18:35 UTCJul 21, 19:55 UTC1h 20m
2026-07-21 SWA3290 MDW → BOS Jul 21, 15:20 UTCJul 21, 17:30 UTC2h 10m
2026-07-21 SWA2066 MDW → STL Jul 21, 04:25 UTCJul 21, 06:35 UTC2h 10m
2026-07-21 SWA1190 MHT → BWI Jul 21, 01:25 UTCJul 21, 03:30 UTC2h 5m
2026-07-21 SWA1190 MHT → BWI Jul 21, 01:20 UTCJul 21, 03:28 UTC2h 8m
2026-07-20 SWA1509 SJC → DAL Jul 20, 22:10 UTCJul 21, 00:30 UTC2h 19m
2026-07-20 SWA3666 MCO → IND Jul 20, 20:40 UTCJul 20, 20:50 UTC10m
2026-07-20 SWA3666 MCO → IND Jul 20, 18:10 UTCJul 20, 20:50 UTC2h 40m
2026-07-20 SWA3666 MCO → IND Jul 20, 18:10 UTCJul 20, 20:22 UTC2h 12m
2026-07-20 SWA398 LAS → SFO Jul 20, 14:05 UTCJul 20, 17:00 UTC2h 55m
2026-07-20 SWA4683 OAK → SEA Jul 20, 11:25 UTCJul 20, 12:50 UTC1h 25m
2026-07-20 SWA982 LAS → ABQ Jul 20, 05:55 UTCJul 20, 07:05 UTC1h 10m
2026-07-20 SWA3935 STL → LAS Jul 20, 01:40 UTCJul 20, 04:25 UTC2h 45m
2026-07-19 SWA3677 DEN → OAK Jul 19, 21:10 UTCJul 20, 00:30 UTC3h 20m
2026-07-19 SWA3677 DEN → OAK Jul 19, 21:10 UTCJul 20, 00:28 UTC3h 18m

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 N8555Z page for operator, model, and routing details .

Mode-S ABBD0A frequently asked

What is Mode-S code ABBD0A?
ABBD0A is an ICAO 24-bit transponder address. Allocated to United States. Assigned to N8555Z.
Where is Mode-S ABBD0A registered?
Mode-S code ABBD0A 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 ABBD0A broadcasting right now?
Yes. Mode-S ABBD0A is currently airborne.
Hex, octal, and decimal Mode-S codes: what's the difference?
The same 24-bit identifier expressed in different bases: hex ABBD0A, octal 52736412, decimal 11,255,050.
What flights does ABBD0A operate?
Mode-S ABBD0A has broadcast 20 distinct callsigns, including SWA4450, SWA1143, SWA719, SWA701, SWA553.