Apparatus

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sensors Mode-S transponder

A264A4

ICAO 24-bit transponder address · allocated to United States

Currently assigned to N253WN · BOEING 737-700 · operated by SOUTHWEST AIRLINES CO

Hex
A264A4
Octal
50462244
Decimal
10,642,596
Country
US
Tail
N253WN
Type
B737
No current signal · last broadcast 4h ago
Flights observed
370
Distinct callsigns
20
Country
US
Last broadcast
4h ago

Last known position

Most recent position reported by Mode-S A264A4.

Country allocation

The ICAO 24-bit address A264A4 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
SWA352 Southwest Airlines 7 2026-07-02
SWA169 Southwest Airlines 7 2026-04-25
SWA714 - 5 2026-06-28
SWA339 - 5 2026-06-22
SWA1813 - 5 2026-04-13
SWA931 - 4 2026-07-10
SWA4605 - 4 2026-04-13
SWA4333 Southwest Airlines 4 2026-06-30
SWA4154 Southwest Airlines 4 2026-07-01
SWA380 - 4 2026-07-13
SWA17 Southwest Airlines 4 2026-06-23
SWA120 - 4 2026-07-11
SWA793 - 3 2026-07-04
SWA47 Southwest Airlines 3 2026-04-19
SWA418 - 3 2026-06-27
SWA397 - 3 2026-07-14
SWA392 - 3 2026-04-13
SWA356 - 3 2026-06-26
SWA3281 Southwest Airlines 3 2026-04-25
SWA3199 Southwest Airlines 3 2026-04-23

Recent flights last 50

DateFlightRouteTakeoffLandingDuration
2026-07-15 SWA407 SMF → BUR Jul 15, 04:05 UTCJul 15, 05:00 UTC55m
2026-07-15 SWA3603 - Jul 15, 01:45 UTCJul 15, 02:40 UTC55m
2026-07-15 SWA697 OAK → SBA Jul 15, 00:05 UTCJul 15, 00:55 UTC50m
2026-07-14 SWA3700 - Jul 14, 22:05 UTCJul 14, 23:05 UTC59m
2026-07-14 SWA397 - Jul 14, 20:05 UTCJul 14, 21:05 UTC1h 0m
2026-07-14 SWA397 SJC → SNA Jul 14, 20:04 UTCJul 14, 21:04 UTC1h 0m
2026-07-14 SWA397 DEN → SJC Jul 14, 17:10 UTCJul 14, 19:15 UTC2h 5m
2026-07-14 SWA2752 LGB → DEN Jul 14, 14:03 UTCJul 14, 16:01 UTC1h 59m
2026-07-14 SWA2752 LGB → DEN Jul 14, 14:05 UTCJul 14, 16:00 UTC1h 55m
2026-07-14 SWA2031 LAS → LGB Jul 14, 03:10 UTCJul 14, 03:55 UTC45m
2026-07-13 SWA380 - Jul 13, 23:20 UTCJul 14, 00:55 UTC1h 35m
2026-07-13 SWA380 AMA → LAS Jul 13, 23:10 UTCJul 14, 00:47 UTC1h 37m
2026-07-13 SWA380 - Jul 13, 21:30 UTCJul 13, 22:10 UTC40m
2026-07-13 SWA380 - Jul 13, 17:20 UTCJul 13, 19:50 UTC2h 30m
2026-07-13 SWA3375 - Jul 13, 14:15 UTCJul 13, 16:00 UTC1h 45m
2026-07-13 SWA3375 PIT → MCO Jul 13, 14:10 UTCJul 13, 15:59 UTC1h 50m
2026-07-13 SWA4041 TPA → PIT Jul 13, 11:00 UTCJul 13, 13:05 UTC2h 5m
2026-07-13 SWA1045 - Jul 13, 02:10 UTCJul 13, 04:05 UTC1h 55m
2026-07-13 SWA1045 BWI → TPA Jul 13, 02:05 UTCJul 13, 04:06 UTC2h 1m
2026-07-12 SWA1045 DEN → BWI Jul 12, 22:05 UTCJul 13, 01:10 UTC3h 5m
2026-07-12 SWA3113 - Jul 12, 18:45 UTCJul 12, 20:10 UTC1h 25m
2026-07-12 SWA3113 OKC → DEN Jul 12, 18:45 UTCJul 12, 20:06 UTC1h 21m
2026-07-12 SWA3010 DEN → OKC Jul 12, 16:35 UTCJul 12, 17:55 UTC1h 20m
2026-07-12 SWA4118 - Jul 12, 14:20 UTCJul 12, 14:55 UTC35m
2026-07-12 SWA4118 MTJ → DEN Jul 12, 14:13 UTCJul 12, 14:57 UTC45m
2026-07-12 SWA422 - Jul 12, 00:45 UTCJul 12, 01:10 UTC25m
2026-07-11 SWA120 ABQ → DEN Jul 11, 20:15 UTCJul 11, 21:10 UTC55m
2026-07-11 SWA120 DAL → ABQ Jul 11, 17:30 UTCJul 11, 18:50 UTC1h 20m
2026-07-11 SWA120 MSY → DAL Jul 11, 15:20 UTCJul 11, 16:25 UTC1h 5m
2026-07-11 SWA120 - Jul 11, 13:05 UTCJul 11, 14:10 UTC1h 5m
2026-07-11 SWA2972 - Jul 11, 10:45 UTCJul 11, 11:55 UTC1h 10m
2026-07-11 SWA2972 RDU → BNA Jul 11, 10:44 UTCJul 11, 11:56 UTC1h 12m
2026-07-11 SWA2690 MCO → RDU Jul 11, 05:05 UTCJul 11, 06:30 UTC1h 25m
2026-07-11 SWA2690 MCO → RDU Jul 11, 05:05 UTCJul 11, 06:25 UTC1h 20m
2026-07-11 SWA2690 - Jul 11, 01:30 UTCJul 11, 03:50 UTC2h 20m
2026-07-11 SWA1401 - Jul 11, 00:00 UTCJul 11, 00:40 UTC40m
2026-07-10 SWA3394 - Jul 10, 21:35 UTCJul 10, 23:00 UTC1h 25m
2026-07-10 SWA931 AUS → PNS Jul 10, 19:10 UTCJul 10, 20:40 UTC1h 30m
2026-07-10 SWA931 AUS → PNS Jul 10, 19:08 UTCJul 10, 20:46 UTC1h 38m
2026-07-10 SWA931 - Jul 10, 17:35 UTCJul 10, 18:10 UTC35m
2026-07-10 SWA931 - Jul 10, 13:45 UTCJul 10, 17:00 UTC3h 15m
2026-07-10 SWA4695 - Jul 10, 11:40 UTCJul 10, 12:40 UTC1h 0m
2026-07-10 SWA915 - Jul 10, 02:50 UTCJul 10, 03:45 UTC55m
2026-07-10 SWA915 BWI → CLT Jul 10, 02:48 UTCJul 10, 03:44 UTC56m
2026-07-10 SWA4354 - Jul 10, 00:55 UTCJul 10, 01:45 UTC50m
2026-07-09 SWA3789 - Jul 9, 23:10 UTCJul 10, 00:05 UTC55m
2026-07-09 SWA868 - Jul 9, 17:45 UTCJul 9, 19:40 UTC1h 55m
2026-07-09 SWA1003 - Jul 9, 15:45 UTCJul 9, 16:55 UTC1h 10m
2026-07-09 SWA3402 - Jul 9, 13:35 UTCJul 9, 14:45 UTC1h 10m
2026-07-09 SWA4821 - Jul 9, 11:30 UTCJul 9, 12:25 UTC55m

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 N253WN page for operator, model, and routing details .

Mode-S A264A4 frequently asked

What is Mode-S code A264A4?
A264A4 is an ICAO 24-bit transponder address. Allocated to United States. Assigned to N253WN.
Where is Mode-S A264A4 registered?
Mode-S code A264A4 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 A264A4 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 A264A4, octal 50462244, decimal 10,642,596.
What flights does A264A4 operate?
Mode-S A264A4 has broadcast 20 distinct callsigns, including SWA352, SWA169, SWA714, SWA339, SWA1813.