Apparatus

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sensors Mode-S transponder

ABB9B2

ICAO 24-bit transponder address · allocated to United States

Currently assigned to N8548P · BOEING 737-800 · operated by SOUTHWEST AIRLINES CO

Hex
ABB9B2
Octal
52734662
Decimal
11,254,194
Country
US
Tail
N8548P
Type
B738
No current signal · last broadcast Jul 26, 22:20 UTC
Flights observed
756
Distinct callsigns
20
Country
US
Last broadcast
Jul 26, 22:20 UTC

Last known position

Most recent position reported by Mode-S ABB9B2.

Country allocation

The ICAO 24-bit address ABB9B2 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
SWA2126 Southwest Airlines 7 2026-07-24
SWA2076 - 6 2026-04-13
SWA4231 - 5 2026-06-27
SWA503 - 4 2026-06-28
SWA2383 - 4 2026-04-13
SWA2211 Southwest Airlines 4 2026-05-19
SWA1599 - 4 2026-06-22
SWA1524 - 4 2026-07-19
SWA1141 Southwest Airlines 4 2026-05-19
SWA1049 Southwest Airlines 4 2026-07-22
SWA894 - 3 2026-04-16
SWA852 Southwest Airlines 3 2026-05-02
SWA705 - 3 2026-07-07
SWA611 - 3 2026-07-11
SWA522 - 3 2026-07-13
SWA4189 Southwest Airlines 3 2026-06-13
SWA3688 Southwest Airlines 3 2026-04-16
SWA36 Southwest Airlines 3 2026-06-19
SWA3567 Southwest Airlines 3 2026-05-01
SWA3397 Southwest Airlines 3 2026-07-21

Recent flights last 50

DateFlightRouteTakeoffLandingDuration
2026-07-26 SWA1363 LAX → OAK Jul 26, 21:15 UTCJul 26, 22:20 UTC1h 5m
2026-07-26 SWA1601 SAN → SJC Jul 26, 18:05 UTCJul 26, 20:00 UTC1h 55m
2026-07-26 SWA1601 SAN → SJC Jul 26, 18:05 UTCJul 26, 19:58 UTC1h 53m
2026-07-26 SWA9000 DAL → HOU Jul 26, 15:00 UTCJul 26, 16:50 UTC1h 50m
2026-07-26 SWA1393 SJC → AUS Jul 26, 11:20 UTCJul 26, 13:40 UTC2h 20m
2026-07-26 SWA4445 BNA → PIT Jul 26, 01:40 UTCJul 26, 04:25 UTC2h 45m
2026-07-25 SWA3440 MDW → LAS Jul 25, 22:20 UTCJul 26, 00:35 UTC2h 15m
2026-07-25 SWA4271 HDN → BNA Jul 25, 19:10 UTCJul 25, 21:20 UTC2h 10m
2026-07-25 SWA2548 SEA → OAK Jul 25, 15:40 UTCJul 25, 16:55 UTC1h 15m
2026-07-25 SWA2548 SEA → OAK Jul 25, 15:36 UTCJul 25, 16:54 UTC1h 18m
2026-07-25 SWA2563 SRQ → ATL Jul 25, 12:20 UTCJul 25, 14:35 UTC2h 15m
2026-07-25 SWA1685 SNA → PHX Jul 25, 04:25 UTCJul 25, 05:45 UTC1h 20m
2026-07-25 SWA3198 TPA → PVD Jul 25, 01:05 UTCJul 25, 03:05 UTC2h 0m
2026-07-24 SWA2126 MDW → BOS Jul 24, 22:15 UTCJul 25, 00:00 UTC1h 45m
2026-07-24 SWA2126 MDW → BOS Jul 24, 17:05 UTCJul 24, 20:35 UTC3h 30m
2026-07-24 SWA537 AUS → MSY Jul 24, 15:20 UTCJul 24, 16:00 UTC40m
2026-07-24 SWA3107 ORD → RSW Jul 24, 12:45 UTCJul 24, 14:00 UTC1h 15m
2026-07-24 SWA4087 MKE → SRQ Jul 24, 02:55 UTCJul 24, 04:45 UTC1h 50m
2026-07-24 SWA4087 MKE → SRQ Jul 24, 02:53 UTCJul 24, 04:40 UTC1h 47m
2026-07-24 SWA878 SAN → SFO Jul 24, 00:15 UTCJul 24, 01:55 UTC1h 40m
2026-07-23 SWA3519 OAK → BUR Jul 23, 22:00 UTCJul 23, 23:00 UTC1h 0m
2026-07-23 SWA3075 SAN → SJC Jul 23, 19:45 UTCJul 23, 20:55 UTC1h 10m
2026-07-23 SWA4166 SJC → LAX Jul 23, 17:30 UTCJul 23, 18:30 UTC1h 0m
2026-07-23 SWA4166 SJC → LAX Jul 23, 17:27 UTCJul 23, 18:27 UTC1h 1m
2026-07-23 SWA1460 SAN → HOU Jul 23, 14:55 UTCJul 23, 16:10 UTC1h 15m
2026-07-23 SWA3629 SFO → LAX Jul 23, 12:05 UTCJul 23, 13:30 UTC1h 25m
2026-07-23 SWA1843 PHX → BWI Jul 23, 06:35 UTCJul 23, 08:00 UTC1h 25m
2026-07-23 SWA1843 PHX → BWI Jul 23, 03:20 UTCJul 23, 05:25 UTC2h 5m
2026-07-22 SWA1049 MDW → SDF Jul 22, 23:35 UTCJul 23, 01:50 UTC2h 15m
2026-07-22 SWA1049 MDW → SDF Jul 22, 18:40 UTCJul 22, 20:10 UTC1h 30m
2026-07-22 SWA1049 MDW → SDF Jul 22, 16:05 UTCJul 22, 17:35 UTC1h 30m
2026-07-22 SWA1049 MDW → SDF Jul 22, 11:20 UTCJul 22, 14:55 UTC3h 35m
2026-07-22 SWA1887 OAK → BUR Jul 22, 02:50 UTCJul 22, 05:25 UTC2h 35m
2026-07-22 SWA1887 OAK → BUR Jul 22, 02:45 UTCJul 22, 05:40 UTC2h 55m
2026-07-21 SWA3397 STL → BOS Jul 21, 16:20 UTCJul 21, 20:15 UTC3h 55m
2026-07-21 SWA3397 STL → BOS Jul 21, 13:10 UTCJul 21, 14:40 UTC1h 30m
2026-07-21 SWA2289 - Jul 21, 05:45 UTCJul 21, 06:45 UTC1h 0m
2026-07-21 SWA963 DEN → SEA Jul 21, 02:15 UTCJul 21, 04:35 UTC2h 20m
2026-07-20 SWA2334 SAN → SFO Jul 20, 22:55 UTCJul 21, 01:20 UTC2h 24m
2026-07-20 SWA2334 SAN → SFO Jul 20, 20:55 UTCJul 20, 21:35 UTC40m
2026-07-20 SWA2260 LIH → LAS Jul 20, 18:50 UTCJul 20, 19:35 UTC45m
2026-07-20 SWA3601 PHX → ORD Jul 20, 16:50 UTCJul 20, 17:40 UTC50m
2026-07-20 SWA3601 PHX → ORD Jul 20, 14:50 UTCJul 20, 15:50 UTC1h 0m
2026-07-20 SWA367 BOS → MDW Jul 20, 12:10 UTCJul 20, 13:45 UTC1h 35m
2026-07-20 SWA2862 BUR → SJC Jul 20, 04:00 UTCJul 20, 06:10 UTC2h 10m
2026-07-20 SWA2862 BUR → SJC Jul 20, 03:58 UTCJul 20, 06:09 UTC2h 11m
2026-07-19 SWA2862 BUR → SJC Jul 19, 23:45 UTCJul 20, 02:40 UTC2h 55m
2026-07-19 SWA1524 - Jul 19, 21:35 UTCJul 19, 22:25 UTC50m
2026-07-19 SWA1524 DEN → DSM Jul 19, 19:05 UTCJul 19, 20:20 UTC1h 15m
2026-07-19 SWA1972 - Jul 19, 16:05 UTCJul 19, 18:00 UTC1h 55m

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 N8548P page for operator, model, and routing details .

Mode-S ABB9B2 frequently asked

What is Mode-S code ABB9B2?
ABB9B2 is an ICAO 24-bit transponder address. Allocated to United States. Assigned to N8548P.
Where is Mode-S ABB9B2 registered?
Mode-S code ABB9B2 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 ABB9B2 broadcasting right now?
No active broadcast right now. Last signal was Jul 26, 22:20 UTC.
Hex, octal, and decimal Mode-S codes: what's the difference?
The same 24-bit identifier expressed in different bases: hex ABB9B2, octal 52734662, decimal 11,254,194.
What flights does ABB9B2 operate?
Mode-S ABB9B2 has broadcast 20 distinct callsigns, including SWA2126, SWA2076, SWA4231, SWA503, SWA2383.