Apparatus

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sensors Mode-S transponder

A63BF4

ICAO 24-bit transponder address · allocated to United States

Currently assigned to N500WR · BOEING 737-800 · operated by SOUTHWEST AIRLINES CO

Hex
A63BF4
Octal
51435764
Decimal
10,894,324
Country
US
Tail
N500WR
Type
B738
No current signal · last broadcast Jul 26, 23:00 UTC
Flights observed
437
Distinct callsigns
20
Country
US
Last broadcast
Jul 26, 23:00 UTC

Last known position

Most recent position reported by Mode-S A63BF4.

Country allocation

The ICAO 24-bit address A63BF4 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
SWA2997 - 8 2026-07-13
SWA420 - 7 2026-07-13
SWA3988 - 6 2026-07-14
SWA4641 - 5 2026-07-14
SWA3769 - 5 2026-06-26
SWA1929 Southwest Airlines 5 2026-05-04
SWA699 - 4 2026-07-19
SWA677 - 4 2026-07-13
SWA3880 - 4 2026-07-13
SWA3610 Southwest Airlines 4 2026-07-17
SWA1680 Southwest Airlines 4 2026-04-14
SWA846 Southwest Airlines 3 2026-05-05
SWA681 - 3 2026-07-12
SWA656 Southwest Airlines 3 2026-07-21
SWA4665 - 3 2026-07-14
SWA416 Southwest Airlines 3 2026-07-23
SWA4017 - 3 2026-07-18
SWA3936 - 3 2026-07-15
SWA38 - 3 2026-07-08
SWA36 Southwest Airlines 3 2026-07-24

Recent flights last 50

DateFlightRouteTakeoffLandingDuration
2026-07-26 SWA737 BNA → LGA Jul 26, 22:35 UTCJul 26, 23:00 UTC25m
2026-07-26 SWA4975 OAK → LAS Jul 26, 19:15 UTCJul 26, 21:10 UTC1h 55m
2026-07-26 SWA2271 SJC → SNA Jul 26, 15:00 UTCJul 26, 18:00 UTC3h 0m
2026-07-26 SWA4197 BWI → MDW Jul 26, 10:20 UTCJul 26, 13:30 UTC3h 10m
2026-07-26 SWA3231 CVG → MDW Jul 26, 02:35 UTCJul 26, 05:35 UTC3h 0m
2026-07-25 SWA3231 CVG → MDW Jul 25, 23:50 UTCJul 26, 01:25 UTC1h 35m
2026-07-25 SWA4124 OGG → OAK Jul 25, 18:40 UTCJul 25, 22:35 UTC3h 55m
2026-07-25 SWA719 SAN → SJC Jul 25, 14:25 UTCJul 25, 17:30 UTC3h 5m
2026-07-25 SWA4317 HOU → LGA Jul 25, 04:20 UTCJul 25, 05:10 UTC50m
2026-07-25 SWA1050 ATL → BNA Jul 25, 02:45 UTCJul 25, 03:35 UTC50m
2026-07-24 SWA1050 ATL → BNA Jul 24, 20:55 UTCJul 25, 01:10 UTC4h 15m
2026-07-24 SWA103 PHL → MDW Jul 24, 16:10 UTCJul 24, 19:30 UTC3h 20m
2026-07-24 SWA3056 MDW → MSP Jul 24, 14:05 UTCJul 24, 14:55 UTC50m
2026-07-24 SWA3028 MKE → BNA Jul 24, 09:40 UTCJul 24, 11:00 UTC1h 20m
2026-07-24 SWA3028 MKE → BNA Jul 24, 09:30 UTCJul 24, 12:56 UTC3h 26m
2026-07-24 SWA36 CRP → HOU Jul 24, 02:55 UTCJul 24, 04:20 UTC1h 25m
2026-07-24 SWA36 CRP → HOU Jul 24, 00:00 UTCJul 24, 01:45 UTC1h 45m
2026-07-23 SWA36 CRP → HOU Jul 23, 20:20 UTCJul 23, 21:05 UTC45m
2026-07-23 SWA2483 HOU → DEN Jul 23, 16:05 UTCJul 23, 19:00 UTC2h 55m
2026-07-23 SWA2483 HOU → DEN Jul 23, 16:00 UTCJul 23, 18:59 UTC2h 59m
2026-07-23 SWA528 MSY → DAL Jul 23, 13:50 UTCJul 23, 14:55 UTC1h 5m
2026-07-23 SWA416 BUR → SJC Jul 23, 04:25 UTCJul 23, 05:25 UTC1h 0m
2026-07-23 SWA416 BUR → SJC Jul 23, 04:20 UTCJul 23, 05:25 UTC1h 5m
2026-07-22 SWA416 BUR → SJC Jul 22, 23:15 UTCJul 23, 03:25 UTC4h 10m
2026-07-22 SWA685 DAL → ORD Jul 22, 20:40 UTCJul 22, 22:00 UTC1h 20m
2026-07-22 SWA685 DAL → ORD Jul 22, 20:36 UTCJul 22, 21:57 UTC1h 21m
2026-07-22 SWA1059 SFO → PHX Jul 22, 17:55 UTCJul 22, 19:25 UTC1h 30m
2026-07-22 SWA1059 SFO → PHX Jul 22, 17:53 UTCJul 22, 19:21 UTC1h 28m
2026-07-22 SWA1059 SFO → PHX Jul 22, 15:35 UTCJul 22, 16:30 UTC55m
2026-07-22 SWA3761 SAN → OAK Jul 22, 12:50 UTCJul 22, 14:15 UTC1h 25m
2026-07-22 SWA3153 - Jul 22, 10:20 UTCJul 22, 11:25 UTC1h 5m
2026-07-22 SWA1967 HOU → LAX Jul 22, 02:45 UTCJul 22, 05:25 UTC2h 40m
2026-07-21 SWA656 PHX → SAN Jul 21, 23:55 UTCJul 22, 01:00 UTC1h 5m
2026-07-21 SWA656 PHX → SAN Jul 21, 20:00 UTCJul 21, 22:50 UTC2h 50m
2026-07-21 SWA656 PHX → SAN Jul 21, 18:00 UTCJul 21, 18:45 UTC45m
2026-07-21 SWA3464 - Jul 21, 16:00 UTCJul 21, 16:45 UTC45m
2026-07-21 SWA4469 AUS → SAN Jul 21, 12:00 UTCJul 21, 14:25 UTC2h 25m
2026-07-20 SWA178 ALB → MCO Jul 20, 23:55 UTCJul 21, 01:35 UTC1h 40m
2026-07-20 SWA254 AUS → ATL Jul 20, 20:45 UTCJul 20, 22:40 UTC1h 55m
2026-07-20 SWA2728 BWI → MHT Jul 20, 17:15 UTCJul 20, 19:15 UTC2h 0m
2026-07-20 SWA2728 BWI → MHT Jul 20, 12:30 UTCJul 20, 16:10 UTC3h 40m
2026-07-20 SWA3154 LAS → SMF Jul 20, 06:20 UTCJul 20, 07:20 UTC1h 0m
2026-07-20 SWA1562 LAX → PHX Jul 20, 02:05 UTCJul 20, 04:20 UTC2h 15m
2026-07-19 SWA4338 LGB → PHX Jul 19, 22:50 UTCJul 20, 01:10 UTC2h 20m
2026-07-19 SWA203 BWI → BDL Jul 19, 20:25 UTCJul 19, 21:30 UTC1h 5m
2026-07-19 SWA1892 DEN → ABQ Jul 19, 18:30 UTCJul 19, 19:20 UTC50m
2026-07-19 SWA699 - Jul 19, 15:50 UTCJul 19, 17:10 UTC1h 20m
2026-07-19 SWA635 - Jul 19, 13:35 UTCJul 19, 14:40 UTC1h 5m
2026-07-19 SWA3501 SCF → SMF Jul 19, 04:10 UTCJul 19, 05:40 UTC1h 30m
2026-07-19 SWA3501 PHX → SMF Jul 19, 04:06 UTCJul 19, 05:37 UTC1h 31m

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 N500WR page for operator, model, and routing details .

Mode-S A63BF4 frequently asked

What is Mode-S code A63BF4?
A63BF4 is an ICAO 24-bit transponder address. Allocated to United States. Assigned to N500WR.
Where is Mode-S A63BF4 registered?
Mode-S code A63BF4 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 A63BF4 broadcasting right now?
No active broadcast right now. Last signal was Jul 26, 23:00 UTC.
Hex, octal, and decimal Mode-S codes: what's the difference?
The same 24-bit identifier expressed in different bases: hex A63BF4, octal 51435764, decimal 10,894,324.
What flights does A63BF4 operate?
Mode-S A63BF4 has broadcast 20 distinct callsigns, including SWA2997, SWA420, SWA3988, SWA4641, SWA3769.