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sensors Mode-S transponder

ABB19C

ICAO 24-bit transponder address · allocated to United States

Currently assigned to N8523W · BOEING 737-800 · operated by SOUTHWEST AIRLINES CO

Hex
ABB19C
Octal
52730634
Decimal
11,252,124
Country
US
Tail
N8523W
Type
B738
No current signal · last broadcast 4h ago
Flights observed
667
Distinct callsigns
20
Country
US
Last broadcast
4h ago

Last known position

Most recent position reported by Mode-S ABB19C.

Country allocation

The ICAO 24-bit address ABB19C 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
SWA1704 - 7 2026-06-18
SWA2354 Southwest Airlines 6 2026-04-13
SWA1935 - 6 2026-07-03
SWA1790 - 6 2026-07-05
SWA3727 Southwest Airlines 5 2026-04-30
SWA235 - 5 2026-07-04
SWA486 - 4 2026-07-03
SWA366 Southwest Airlines 4 2026-04-16
SWA3215 - 4 2026-07-08
SWA2927 - 4 2026-07-04
SWA2296 Southwest Airlines 4 2026-05-22
SWA1970 Southwest Airlines 4 2026-04-16
SWA1882 Southwest Airlines 4 2026-05-11
SWA1422 Southwest Airlines 4 2026-04-30
SWA958 - 3 2026-06-27
SWA737 - 3 2026-06-19
SWA663 - 3 2026-04-13
SWA654 - 3 2026-07-02
SWA572 Southwest Airlines 3 2026-05-03
SWA4301 Southwest Airlines 3 2026-06-13

Recent flights last 50

DateFlightRouteTakeoffLandingDuration
2026-07-15 SWA4336 - Jul 15, 05:15 UTCJul 15, 06:20 UTC1h 5m
2026-07-15 SWA976 - Jul 15, 00:05 UTCJul 15, 04:05 UTC4h 0m
2026-07-14 SWA3332 - Jul 14, 19:50 UTCJul 14, 22:45 UTC2h 54m
2026-07-14 SWA2263 DEN → AUS Jul 14, 16:35 UTCJul 14, 18:15 UTC1h 40m
2026-07-14 SWA2223 LAS → DEN Jul 14, 13:40 UTCJul 14, 15:05 UTC1h 25m
2026-07-14 SWA2223 LAS → DEN Jul 14, 13:40 UTCJul 14, 15:05 UTC1h 26m
2026-07-14 SWA3936 STL → LAS Jul 14, 04:35 UTCJul 14, 07:25 UTC2h 50m
2026-07-14 SWA3387 - Jul 14, 02:40 UTCJul 14, 03:55 UTC1h 15m
2026-07-13 SWA2067 - Jul 13, 21:55 UTCJul 14, 00:20 UTC2h 25m
2026-07-13 SWA2067 HOU → PIT Jul 13, 21:51 UTCJul 14, 00:12 UTC2h 21m
2026-07-13 SWA3067 - Jul 13, 18:20 UTCJul 13, 20:50 UTC2h 30m
2026-07-13 SWA3770 BNA → PHX Jul 13, 13:35 UTCJul 13, 16:35 UTC3h 0m
2026-07-13 SWA4581 - Jul 13, 10:55 UTCJul 13, 12:05 UTC1h 10m
2026-07-13 SWA4581 DTW → BNA Jul 13, 10:53 UTCJul 13, 11:59 UTC1h 6m
2026-07-13 SWA1600 - Jul 13, 02:40 UTCJul 13, 03:45 UTC1h 5m
2026-07-13 SWA1600 BWI → DTW Jul 13, 02:40 UTCJul 13, 03:45 UTC1h 5m
2026-07-12 SWA1387 MCO → BWI Jul 12, 23:30 UTCJul 13, 01:30 UTC2h 0m
2026-07-12 SWA1387 MCO → BWI Jul 12, 23:26 UTCJul 13, 01:24 UTC1h 59m
2026-07-12 SWA783 - Jul 12, 20:40 UTCJul 12, 21:25 UTC45m
2026-07-12 SWA782 - Jul 12, 15:01 UTCJul 12, 16:45 UTC1h 45m
2026-07-12 SWA782 MCO → PUJ Jul 12, 15:00 UTCJul 12, 17:17 UTC2h 17m
2026-07-12 SWA3799 - Jul 12, 05:25 UTCJul 12, 10:05 UTC4h 40m
2026-07-12 SWA136 DEN → SMF Jul 12, 02:15 UTCJul 12, 04:15 UTC2h 0m
2026-07-11 SWA3803 SAV → DEN Jul 11, 21:40 UTCJul 12, 00:45 UTC3h 5m
2026-07-11 SWA3803 SAV → DEN Jul 11, 21:38 UTCJul 12, 00:45 UTC3h 8m
2026-07-11 SWA2919 - Jul 11, 18:20 UTCJul 11, 20:05 UTC1h 45m
2026-07-11 SWA2919 MDW → SAV Jul 11, 18:15 UTCJul 11, 20:02 UTC1h 47m
2026-07-11 SWA2673 - Jul 11, 15:50 UTCJul 11, 16:50 UTC1h 0m
2026-07-11 SWA2673 MCO → OMA Jul 11, 11:55 UTCJul 11, 14:30 UTC2h 35m
2026-07-11 SWA4679 - Jul 11, 09:10 UTCJul 11, 10:40 UTC1h 30m
2026-07-11 SWA4679 SDF → MCO Jul 11, 09:06 UTCJul 11, 10:39 UTC1h 33m
2026-07-11 SWA4798 - Jul 11, 02:00 UTCJul 11, 03:40 UTC1h 40m
2026-07-10 SWA3431 - Jul 10, 23:05 UTCJul 11, 00:40 UTC1h 35m
2026-07-10 SWA1071 - Jul 10, 21:05 UTCJul 10, 22:15 UTC1h 10m
2026-07-10 SWA267 - Jul 10, 17:05 UTCJul 10, 20:10 UTC3h 5m
2026-07-10 SWA3034 OAK → AUS Jul 10, 12:55 UTCJul 10, 16:00 UTC3h 5m
2026-07-10 SWA2289 LAS → OAK Jul 10, 05:00 UTCJul 10, 06:10 UTC1h 10m
2026-07-10 SWA354 - Jul 10, 00:30 UTCJul 10, 03:55 UTC3h 25m
2026-07-09 SWA492 - Jul 9, 21:10 UTCJul 9, 23:35 UTC2h 25m
2026-07-09 SWA1121 - Jul 9, 18:00 UTCJul 9, 20:00 UTC2h 0m
2026-07-09 SWA1121 - Jul 9, 15:40 UTCJul 9, 16:55 UTC1h 15m
2026-07-09 SWA830 MDW → MHT Jul 9, 12:45 UTCJul 9, 14:30 UTC1h 45m
2026-07-09 SWA1243 - Jul 9, 09:10 UTCJul 9, 11:40 UTC2h 30m
2026-07-09 SWA4831 STL → RSW Jul 9, 00:20 UTCJul 9, 02:30 UTC2h 10m
2026-07-08 SWA4341 - Jul 8, 22:50 UTCJul 8, 23:25 UTC35m
2026-07-08 SWA480 - Jul 8, 19:30 UTCJul 8, 21:25 UTC1h 55m
2026-07-08 SWA4562 BNA → DCA Jul 8, 16:45 UTCJul 8, 18:05 UTC1h 20m
2026-07-08 SWA3215 - Jul 8, 14:10 UTCJul 8, 15:45 UTC1h 35m
2026-07-08 SWA634 - Jul 8, 02:10 UTCJul 8, 03:40 UTC1h 30m
2026-07-08 SWA634 BNA → PHL Jul 8, 02:07 UTCJul 8, 03:35 UTC1h 28m

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 N8523W page for operator, model, and routing details .

Mode-S ABB19C frequently asked

What is Mode-S code ABB19C?
ABB19C is an ICAO 24-bit transponder address. Allocated to United States. Assigned to N8523W.
Where is Mode-S ABB19C registered?
Mode-S code ABB19C 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 ABB19C broadcasting right now?
No active broadcast right now. Last signal was 4h ago.
Hex, octal, and decimal Mode-S codes: what's the difference?
The same 24-bit identifier expressed in different bases: hex ABB19C, octal 52730634, decimal 11,252,124.
What flights does ABB19C operate?
Mode-S ABB19C has broadcast 20 distinct callsigns, including SWA1704, SWA2354, SWA1935, SWA1790, SWA3727.