Apparatus

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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
Broadcasting now · callsign SWA8500 · -200 ft
Flights observed
754
Distinct callsigns
20
Country
US
Last broadcast
Jul 26, 22:45 UTC

Current position

ABB19C is currently broadcasting. Map zoomed to live position.

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
SWA4581 Southwest Airlines 4 2026-07-25
SWA366 Southwest Airlines 4 2026-04-16
SWA3215 - 4 2026-07-08
SWA2927 - 4 2026-07-04
SWA2919 - 4 2026-07-17
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

Recent flights last 50

DateFlightRouteTakeoffLandingDuration
2026-07-26 SWA1880 ATL → PHL Jul 26, 22:20 UTCJul 26, 22:45 UTC25m
2026-07-26 SWA1880 ATL → PHL Jul 26, 19:35 UTCJul 26, 21:05 UTC1h 30m
2026-07-26 SWA3538 TPA → BNA Jul 26, 17:45 UTCJul 26, 18:40 UTC55m
2026-07-26 SWA2695 OAK → BUR Jul 26, 11:55 UTCJul 26, 16:05 UTC4h 10m
2026-07-26 SWA4874 PHX → BWI Jul 26, 05:15 UTCJul 26, 09:40 UTC4h 26m
2026-07-26 SWA2475 SJC → BUR Jul 26, 02:45 UTCJul 26, 03:30 UTC45m
2026-07-26 SWA2475 SJC → BUR Jul 26, 02:38 UTCJul 26, 03:25 UTC47m
2026-07-25 SWA2475 SJC → BUR Jul 25, 21:45 UTCJul 26, 01:40 UTC3h 55m
2026-07-25 SWA261 DCA → MSY Jul 25, 19:15 UTCJul 25, 20:40 UTC1h 25m
2026-07-25 SWA4049 DEN → MCO Jul 25, 16:05 UTCJul 25, 18:00 UTC1h 55m
2026-07-25 SWA4049 DEN → MCO Jul 25, 16:00 UTCJul 25, 18:00 UTC2h 0m
2026-07-25 SWA684 PHL → TPA Jul 25, 13:35 UTCJul 25, 14:55 UTC1h 20m
2026-07-25 SWA4581 BNA → BOS Jul 25, 10:40 UTCJul 25, 11:55 UTC1h 15m
2026-07-25 SWA4581 BNA → BOS Jul 25, 10:38 UTCJul 25, 11:46 UTC1h 8m
2026-07-25 SWA2210 SJC → PHX Jul 25, 03:05 UTCJul 25, 04:15 UTC1h 10m
2026-07-25 SWA2607 MCO → ALB Jul 25, 00:00 UTCJul 25, 01:40 UTC1h 40m
2026-07-24 SWA2607 MCO → ALB Jul 24, 23:56 UTCJul 25, 01:39 UTC1h 43m
2026-07-24 SWA2566 BNA → LGA Jul 24, 20:20 UTCJul 24, 22:30 UTC2h 10m
2026-07-24 SWA4887 RNO → SJC Jul 24, 18:00 UTCJul 24, 19:05 UTC1h 5m
2026-07-24 SWA4887 RNO → SJC Jul 24, 17:56 UTCJul 24, 19:06 UTC1h 10m
2026-07-24 SWA1988 DEN → OAK Jul 24, 15:00 UTCJul 24, 16:45 UTC1h 45m
2026-07-24 SWA1988 DEN → OAK Jul 24, 14:54 UTCJul 24, 16:41 UTC1h 47m
2026-07-24 SWA3246 SJC → PHX Jul 24, 11:15 UTCJul 24, 13:55 UTC2h 40m
2026-07-24 SWA467 SJC → SAN Jul 24, 01:40 UTCJul 24, 03:00 UTC1h 20m
2026-07-24 SWA467 SJC → SAN Jul 24, 01:40 UTCJul 24, 03:08 UTC1h 28m
2026-07-23 SWA2597 SJC → LAX Jul 23, 22:06 UTCJul 24, 00:07 UTC2h 1m
2026-07-23 SWA2597 SJC → LAX Jul 23, 22:10 UTCJul 24, 00:10 UTC2h 0m
2026-07-23 SWA3220 DEN → SNA Jul 23, 16:55 UTCJul 23, 20:30 UTC3h 35m
2026-07-23 SWA3220 DEN → SNA Jul 23, 16:50 UTCJul 23, 20:25 UTC3h 35m
2026-07-23 SWA4901 - Jul 23, 14:15 UTCJul 23, 15:35 UTC1h 20m
2026-07-22 SWA768 SJC → AUS Jul 22, 23:20 UTCJul 23, 00:45 UTC1h 25m
2026-07-22 SWA768 SJC → AUS Jul 22, 23:16 UTCJul 23, 00:35 UTC1h 19m
2026-07-22 SWA2259 OAK → LAX Jul 22, 19:43 UTCJul 22, 22:15 UTC2h 32m
2026-07-22 SWA2259 OAK → LAX Jul 22, 19:45 UTCJul 22, 22:15 UTC2h 30m
2026-07-22 SWA3042 OAK → GEG Jul 22, 16:20 UTCJul 22, 18:25 UTC2h 5m
2026-07-22 SWA4947 LGB → OAK Jul 22, 14:10 UTCJul 22, 15:00 UTC50m
2026-07-22 SWA744 BWI → SAT Jul 22, 03:15 UTCJul 22, 04:20 UTC1h 5m
2026-07-22 SWA744 BWI → SAT Jul 22, 03:10 UTCJul 22, 04:14 UTC1h 4m
2026-07-22 SWA3549 BUR → LAS Jul 22, 01:15 UTCJul 22, 02:20 UTC1h 5m
2026-07-21 SWA2956 SMF → LAS Jul 21, 20:15 UTCJul 22, 00:00 UTC3h 45m
2026-07-21 SWA4337 SMF → LAS Jul 21, 16:05 UTCJul 21, 19:05 UTC3h 0m
2026-07-21 SWA4179 LAS → BNA Jul 21, 13:10 UTCJul 21, 15:00 UTC1h 50m
2026-07-21 SWA384 DEN → BNA Jul 21, 05:10 UTCJul 21, 06:30 UTC1h 20m
2026-07-21 SWA4186 DEN → BOS Jul 21, 02:50 UTCJul 21, 03:50 UTC1h 0m
2026-07-20 SWA40 HOU → DAL Jul 20, 23:15 UTCJul 21, 01:50 UTC2h 34m
2026-07-20 SWA40 HOU → DAL Jul 20, 23:15 UTCJul 21, 01:49 UTC2h 35m
2026-07-20 SWA40 HOU → DAL Jul 20, 21:25 UTCJul 20, 22:10 UTC45m
2026-07-20 SWA4254 DAL → CHS Jul 20, 17:20 UTCJul 20, 19:50 UTC2h 30m
2026-07-20 SWA1267 - Jul 20, 14:55 UTCJul 20, 16:10 UTC1h 15m
2026-07-20 SWA1267 - Jul 20, 13:05 UTCJul 20, 13:55 UTC50m

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?
Yes. Mode-S ABB19C is currently airborne.
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.