Apparatus

Try JFK, AAL1290, BAW, or N225AN.

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
No current signal · last broadcast Jul 26, 22:45 UTC
Flights observed
746
Distinct callsigns
20
Country
US
Last broadcast
Jul 26, 22:45 UTC

Last known position

Most recent position reported by Mode-S A28C23.

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
SWA684 - 5 2026-07-17
SWA3526 Southwest Airlines 5 2026-06-09
SWA2154 - 5 2026-07-13
SWA973 Southwest Airlines 4 2026-07-22
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
SWA1432 - 4 2026-07-18

Recent flights last 50

DateFlightRouteTakeoffLandingDuration
2026-07-26 SWA4418 SAN → OAK Jul 26, 20:55 UTCJul 26, 22:45 UTC1h 50m
2026-07-26 SWA2068 OGG → OAK Jul 26, 17:55 UTCJul 26, 19:55 UTC2h 0m
2026-07-26 SWA2068 OGG → OAK Jul 26, 15:45 UTCJul 26, 16:55 UTC1h 10m
2026-07-26 SWA3609 SYR → MCO Jul 26, 12:50 UTCJul 26, 13:35 UTC45m
2026-07-26 SWA671 LGB → DAL Jul 26, 01:05 UTCJul 26, 01:40 UTC35m
2026-07-25 SWA1768 OAK → SNA Jul 25, 23:10 UTCJul 25, 23:40 UTC30m
2026-07-25 SWA1768 OAK → SNA Jul 25, 23:05 UTCJul 25, 23:37 UTC32m
2026-07-25 SWA1768 OAK → SNA Jul 25, 19:55 UTCJul 25, 22:10 UTC2h 15m
2026-07-25 SWA1972 DAL → LAX Jul 25, 16:45 UTCJul 25, 18:45 UTC2h 0m
2026-07-25 SWA1535 BNA → MSY Jul 25, 13:40 UTCJul 25, 15:35 UTC1h 55m
2026-07-25 SWA1220 LAX → OAK Jul 25, 11:45 UTCJul 25, 12:10 UTC25m
2026-07-25 SWA4487 MDW → DAL Jul 25, 04:55 UTCJul 25, 06:15 UTC1h 20m
2026-07-25 SWA4487 MDW → DAL Jul 25, 04:54 UTCJul 25, 06:25 UTC1h 31m
2026-07-25 SWA3745 PHX → OKC Jul 25, 02:55 UTCJul 25, 03:55 UTC1h 0m
2026-07-25 SWA4867 PWM → BWI Jul 25, 00:05 UTCJul 25, 01:17 UTC1h 12m
2026-07-25 SWA4867 PWM → BWI Jul 25, 00:10 UTCJul 25, 01:20 UTC1h 10m
2026-07-24 SWA1299 PVR → PHX Jul 24, 16:45 UTCJul 24, 22:05 UTC5h 20m
2026-07-24 SWA839 LAX → OAK Jul 24, 03:35 UTCJul 24, 04:45 UTC1h 10m
2026-07-24 SWA4174 SAN → OAK Jul 24, 00:35 UTCJul 24, 02:30 UTC1h 55m
2026-07-23 SWA515 PVR → DEN Jul 23, 15:00 UTCJul 23, 20:50 UTC5h 50m
2026-07-23 SWA4456 SJC → PDX Jul 23, 11:35 UTCJul 23, 13:10 UTC1h 35m
2026-07-23 SWA2453 LAS → ELP Jul 23, 02:55 UTCJul 23, 03:35 UTC40m
2026-07-23 SWA792 MDW → SAV Jul 23, 00:30 UTCJul 23, 01:50 UTC1h 20m
2026-07-23 SWA792 MDW → SAV Jul 23, 00:29 UTCJul 23, 01:46 UTC1h 17m
2026-07-22 SWA30 IND → RSW Jul 22, 19:55 UTCJul 22, 23:35 UTC3h 40m
2026-07-22 SWA30 IND → RSW Jul 22, 19:54 UTCJul 22, 23:25 UTC3h 31m
2026-07-22 SWA9 - Jul 22, 18:10 UTCJul 22, 18:55 UTC45m
2026-07-22 SWA9 LAX → LAS Jul 22, 18:05 UTCJul 22, 18:49 UTC45m
2026-07-22 SWA973 LAS → AUS Jul 22, 16:00 UTCJul 22, 16:40 UTC40m
2026-07-22 SWA973 LAS → AUS Jul 22, 13:55 UTCJul 22, 14:50 UTC55m
2026-07-22 SWA4647 STL → BOS Jul 22, 03:00 UTCJul 22, 03:55 UTC55m
2026-07-22 SWA4647 STL → BOS Jul 22, 02:59 UTCJul 22, 03:55 UTC56m
2026-07-22 SWA4116 SMF → LAS Jul 22, 01:05 UTCJul 22, 02:10 UTC1h 5m
2026-07-21 SWA851 STL → LGA Jul 21, 23:25 UTCJul 22, 00:15 UTC50m
2026-07-21 SWA851 STL → LGA Jul 21, 23:20 UTCJul 22, 00:12 UTC52m
2026-07-21 SWA3767 LAS → LAX Jul 21, 21:50 UTCJul 21, 22:45 UTC55m
2026-07-21 SWA2146 PHX → SJC Jul 21, 19:40 UTCJul 21, 20:50 UTC1h 10m
2026-07-21 SWA4239 MSY → DCA Jul 21, 17:25 UTCJul 21, 18:35 UTC1h 10m
2026-07-21 SWA827 BUR → SFO Jul 21, 15:35 UTCJul 21, 16:30 UTC55m
2026-07-21 SWA2196 - Jul 21, 13:30 UTCJul 21, 14:15 UTC45m
2026-07-21 SWA2196 LAS → BUR Jul 21, 13:28 UTCJul 21, 14:10 UTC42m
2026-07-21 SWA4378 SAT → MSY Jul 21, 04:50 UTCJul 21, 07:00 UTC2h 10m
2026-07-21 SWA4378 SAT → MSY Jul 21, 04:49 UTCJul 21, 07:04 UTC2h 15m
2026-07-21 SWA1005 BUR → SMF Jul 21, 02:25 UTCJul 21, 04:05 UTC1h 40m
2026-07-20 SWA1999 PUJ → MDW Jul 20, 19:15 UTCJul 20, 23:15 UTC4h 0m
2026-07-20 SWA782 - Jul 20, 15:15 UTCJul 20, 15:50 UTC35m
2026-07-20 SWA782 MCO → PUJ Jul 20, 15:12 UTCJul 20, 17:24 UTC2h 12m
2026-07-20 SWA4869 PHL → MDW Jul 20, 11:10 UTCJul 20, 13:30 UTC2h 20m
2026-07-20 SWA4776 DEN → SFO Jul 20, 00:45 UTCJul 20, 02:40 UTC1h 55m
2026-07-19 SWA3411 ONT → DAL Jul 19, 20:30 UTCJul 19, 22:50 UTC2h 20m

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?
No active broadcast right now. Last signal was Jul 26, 22:45 UTC.
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.