Apparatus

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sensors Mode-S transponder

A28C23

ICAO 24-bit transponder address · allocated to United States

Currently assigned to N263WN · BOEING 737-700 · operated by SOUTHWEST AIRLINES CO

Hex
A28C23
Octal
50506043
Decimal
10,652,707
Country
US
Tail
N263WN
Type
B737
Broadcasting now · callsign SWA690 · 8,150 ft
Flights observed
659
Distinct callsigns
20
Country
US
Last broadcast
1h ago

Current position

A28C23 is currently broadcasting. Map zoomed to live position.

Country allocation

The ICAO 24-bit address A28C23 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
SWA3816 Southwest Airlines 7 2026-06-03
SWA2422 - 7 2026-07-10
SWA3257 Southwest Airlines 6 2026-06-11
SWA278 - 6 2026-07-06
SWA735 Southwest Airlines 5 2026-04-29
SWA3526 Southwest Airlines 5 2026-06-09
SWA2154 - 5 2026-07-13
SWA4007 Southwest Airlines 4 2026-06-01
SWA3845 - 4 2026-07-02
SWA3624 Southwest Airlines 4 2026-06-16
SWA3144 Southwest Airlines 4 2026-04-20
SWA2699 Southwest Airlines 4 2026-05-18
SWA2673 - 4 2026-06-15
SWA194 - 4 2026-06-25
SWA1896 Southwest Airlines 4 2026-05-21
SWA149 - 4 2026-07-01
SWA1471 - 4 2026-07-13
SWA1409 Southwest Airlines 4 2026-05-18
SWA1363 Southwest Airlines 4 2026-05-08
SWA1321 Southwest Airlines 4 2026-04-18

Recent flights last 50

DateFlightRouteTakeoffLandingDuration
2026-07-14 SWA690 - Jul 14, 22:10 UTCJul 14, 22:20 UTC10m
2026-07-14 SWA803 - Jul 14, 19:40 UTCJul 14, 20:45 UTC1h 5m
2026-07-14 SWA803 LGB → OAK Jul 14, 18:00 UTCJul 14, 18:50 UTC50m
2026-07-14 SWA803 - Jul 14, 14:15 UTCJul 14, 17:15 UTC3h 0m
2026-07-14 SWA2645 - Jul 14, 02:50 UTCJul 14, 04:45 UTC1h 55m
2026-07-13 SWA3949 STL → MCO Jul 13, 23:15 UTCJul 14, 01:15 UTC2h 0m
2026-07-13 SWA3949 STL → MCO Jul 13, 23:14 UTCJul 14, 01:14 UTC2h 1m
2026-07-13 SWA2740 LGA → STL Jul 13, 19:30 UTCJul 13, 21:30 UTC2h 0m
2026-07-13 SWA2740 LGA → STL Jul 13, 19:30 UTCJul 13, 21:28 UTC1h 58m
2026-07-13 SWA1373 - Jul 13, 16:10 UTCJul 13, 18:10 UTC2h 0m
2026-07-13 SWA1373 DEN → STL Jul 13, 13:30 UTCJul 13, 15:10 UTC1h 40m
2026-07-13 SWA1471 - Jul 13, 10:35 UTCJul 13, 10:45 UTC10m
2026-07-13 SWA1471 SAT → DEN Jul 13, 10:33 UTCJul 13, 12:23 UTC1h 51m
2026-07-13 SWA4260 - Jul 13, 05:31 UTCJul 13, 06:30 UTC1h 0m
2026-07-13 SWA2154 - Jul 13, 03:25 UTCJul 13, 04:25 UTC1h 0m
2026-07-13 SWA2154 - Jul 13, 01:01 UTCJul 13, 02:15 UTC1h 15m
2026-07-12 SWA2154 - Jul 12, 23:05 UTCJul 13, 00:25 UTC1h 20m
2026-07-12 SWA2154 - Jul 12, 20:50 UTCJul 12, 22:10 UTC1h 20m
2026-07-12 SWA2154 PHX → ABQ Jul 12, 19:05 UTCJul 12, 20:01 UTC55m
2026-07-12 SWA1493 SEA → PHX Jul 12, 15:01 UTCJul 12, 17:30 UTC2h 30m
2026-07-12 SWA3856 DEN → SEA Jul 12, 05:35 UTCJul 12, 07:55 UTC2h 20m
2026-07-12 SWA1975 - Jul 12, 02:30 UTCJul 12, 02:45 UTC15m
2026-07-12 SWA1975 HOU → DEN Jul 12, 02:29 UTCJul 12, 04:30 UTC2h 1m
2026-07-12 SWA1810 - Jul 12, 00:30 UTCJul 12, 01:20 UTC50m
2026-07-12 SWA1810 MSY → HOU Jul 12, 00:29 UTCJul 12, 01:21 UTC52m
2026-07-11 SWA1453 - Jul 11, 21:35 UTCJul 11, 23:40 UTC2h 5m
2026-07-11 SWA3478 - Jul 11, 19:10 UTCJul 11, 20:25 UTC1h 15m
2026-07-11 SWA3478 - Jul 11, 14:30 UTCJul 11, 18:10 UTC3h 40m
2026-07-11 SWA4521 ABQ → SAN Jul 11, 05:15 UTCJul 11, 06:45 UTC1h 30m
2026-07-11 SWA4521 ABQ → SAN Jul 11, 05:12 UTCJul 11, 06:36 UTC1h 24m
2026-07-10 SWA237 OAK → ABQ Jul 10, 23:45 UTCJul 11, 01:35 UTC1h 50m
2026-07-10 SWA2422 - Jul 10, 21:30 UTCJul 10, 22:25 UTC55m
2026-07-10 SWA2422 PSP → OAK Jul 10, 21:21 UTCJul 10, 22:25 UTC1h 4m
2026-07-10 SWA2422 - Jul 10, 20:00 UTCJul 10, 20:25 UTC25m
2026-07-10 SWA2422 - Jul 10, 18:00 UTCJul 10, 18:45 UTC45m
2026-07-10 SWA3464 - Jul 10, 16:10 UTCJul 10, 17:00 UTC50m
2026-07-10 SWA4813 - Jul 10, 13:00 UTCJul 10, 14:15 UTC1h 15m
2026-07-10 SWA4191 - Jul 10, 04:50 UTCJul 10, 06:05 UTC1h 15m
2026-07-09 SWA2696 MCO → SAN Jul 9, 23:20 UTCJul 10, 03:45 UTC4h 25m
2026-07-09 SWA3995 - Jul 9, 19:00 UTCJul 9, 21:40 UTC2h 40m
2026-07-09 SWA4999 - Jul 9, 15:20 UTCJul 9, 17:50 UTC2h 30m
2026-07-09 SWA617 - Jul 9, 12:50 UTCJul 9, 13:50 UTC1h 0m
2026-07-08 SWA616 - Jul 8, 22:05 UTCJul 8, 22:40 UTC35m
2026-07-08 SWA616 MCO → NAS Jul 8, 22:02 UTCJul 8, 22:50 UTC48m
2026-07-08 SWA908 - Jul 8, 18:25 UTCJul 8, 20:25 UTC2h 0m
2026-07-08 SWA908 - Jul 8, 16:25 UTCJul 8, 17:30 UTC1h 5m
2026-07-08 SWA2087 - Jul 8, 13:55 UTCJul 8, 15:35 UTC1h 40m
2026-07-08 SWA2087 JAX → STL Jul 8, 13:54 UTCJul 8, 15:35 UTC1h 41m
2026-07-08 SWA8800 - Jul 8, 11:10 UTCJul 8, 12:50 UTC1h 40m
2026-07-08 SWA2355 - Jul 8, 00:15 UTCJul 8, 01:25 UTC1h 10m

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 N263WN page for operator, model, and routing details .

Mode-S A28C23 frequently asked

What is Mode-S code A28C23?
A28C23 is an ICAO 24-bit transponder address. Allocated to United States. Assigned to N263WN.
Where is Mode-S A28C23 registered?
Mode-S code A28C23 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 A28C23 broadcasting right now?
Yes. Mode-S A28C23 is currently airborne.
Hex, octal, and decimal Mode-S codes: what's the difference?
The same 24-bit identifier expressed in different bases: hex A28C23, octal 50506043, decimal 10,652,707.
What flights does A28C23 operate?
Mode-S A28C23 has broadcast 20 distinct callsigns, including SWA3816, SWA2422, SWA3257, SWA278, SWA735.