Apparatus

Try JFK, AAL1290, BAW, or N225AN.

sensors Mode-S transponder

AD493B

ICAO 24-bit transponder address · allocated to United States

Currently assigned to N955WN · BOEING 737-700 · operated by SOUTHWEST AIRLINES CO

Hex
AD493B
Octal
53244473
Decimal
11,356,475
Country
US
Tail
N955WN
Type
B737
No current signal · last broadcast Jul 26, 22:45 UTC
Flights observed
788
Distinct callsigns
20
Country
US
Last broadcast
Jul 26, 22:45 UTC

Last known position

Most recent position reported by Mode-S AD493B.

Country allocation

The ICAO 24-bit address AD493B 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
SWA3335 Southwest Airlines 9 2026-06-11
SWA3281 Southwest Airlines 8 2026-05-27
SWA3243 Southwest Airlines 7 2026-06-02
SWA278 - 7 2026-06-23
SWA1372 Southwest Airlines 7 2026-05-20
SWA1192 Southwest Airlines 7 2026-05-20
SWA1502 - 6 2026-07-11
SWA1222 - 6 2026-07-03
SWA380 - 5 2026-07-18
SWA2451 Southwest Airlines 5 2026-05-21
SWA2307 Southwest Airlines 5 2026-07-23
SWA1382 - 5 2026-07-02
SWA1152 Southwest Airlines 5 2026-07-23
SWA860 - 4 2026-07-03
SWA647 Southwest Airlines 4 2026-06-09
SWA4722 Southwest Airlines 4 2026-05-17
SWA4055 Southwest Airlines 4 2026-05-12
SWA3589 Southwest Airlines 4 2026-05-30
SWA3156 - 4 2026-07-01
SWA2784 Southwest Airlines 4 2026-04-28

Recent flights last 50

DateFlightRouteTakeoffLandingDuration
2026-07-26 SWA915 BUR → SJC Jul 26, 21:15 UTCJul 26, 22:45 UTC1h 30m
2026-07-26 SWA1277 LAS → CMH Jul 26, 19:00 UTCJul 26, 20:05 UTC1h 5m
2026-07-26 SWA1277 LAS → CMH Jul 26, 16:20 UTCJul 26, 18:05 UTC1h 45m
2026-07-26 SWA1277 LAS → CMH Jul 26, 14:30 UTCJul 26, 15:20 UTC50m
2026-07-26 SWA3653 MHT → TPA Jul 26, 04:25 UTCJul 26, 05:35 UTC1h 10m
2026-07-25 SWA1101 MDW → CLT Jul 25, 22:05 UTCJul 26, 03:20 UTC5h 15m
2026-07-25 SWA1101 MDW → CLT Jul 25, 19:45 UTCJul 25, 20:50 UTC1h 5m
2026-07-25 SWA1101 MDW → CLT Jul 25, 15:50 UTCJul 25, 18:25 UTC2h 35m
2026-07-25 SWA385 MHT → MDW Jul 25, 12:00 UTCJul 25, 14:25 UTC2h 25m
2026-07-25 SWA385 MHT → MDW Jul 25, 10:20 UTCJul 25, 10:50 UTC30m
2026-07-25 SWA2710 STL → BOS Jul 25, 01:00 UTCJul 25, 01:20 UTC20m
2026-07-24 SWA3656 MCO → MSY Jul 24, 22:25 UTCJul 24, 23:35 UTC1h 10m
2026-07-24 SWA3656 MCO → MSY Jul 24, 19:50 UTCJul 24, 21:30 UTC1h 40m
2026-07-24 SWA3896 MDW → PNS Jul 24, 14:05 UTCJul 24, 18:35 UTC4h 30m
2026-07-24 SWA3822 BNA → CHS Jul 24, 04:05 UTCJul 24, 05:15 UTC1h 10m
2026-07-24 SWA3549 BUR → LAS Jul 24, 01:55 UTCJul 24, 03:00 UTC1h 5m
2026-07-23 SWA4910 BWI → SAN Jul 23, 22:20 UTCJul 24, 00:50 UTC2h 30m
2026-07-23 SWA814 BUR → OAK Jul 23, 18:00 UTCJul 23, 20:30 UTC2h 30m
2026-07-23 SWA814 BUR → OAK Jul 23, 15:40 UTCJul 23, 16:50 UTC1h 10m
2026-07-23 SWA4909 SMF → BUR Jul 23, 13:45 UTCJul 23, 14:35 UTC50m
2026-07-23 SWA1152 BWI → PVD Jul 23, 03:35 UTCJul 23, 04:45 UTC1h 10m
2026-07-23 SWA1152 BWI → PVD Jul 23, 03:33 UTCJul 23, 04:42 UTC1h 9m
2026-07-23 SWA2307 SJC → DAL Jul 23, 00:30 UTCJul 23, 02:15 UTC1h 45m
2026-07-23 SWA2307 SJC → DAL Jul 23, 00:28 UTCJul 23, 02:16 UTC1h 48m
2026-07-22 SWA3644 SFO → LAS Jul 22, 22:00 UTCJul 22, 23:10 UTC1h 10m
2026-07-22 SWA3412 - Jul 22, 19:45 UTCJul 22, 20:45 UTC1h 0m
2026-07-22 SWA2056 OAK → SAN Jul 22, 17:20 UTCJul 22, 18:40 UTC1h 20m
2026-07-22 SWA543 SAN → SJC Jul 22, 14:20 UTCJul 22, 16:05 UTC1h 45m
2026-07-22 SWA2250 OAK → LAS Jul 22, 04:50 UTCJul 22, 05:25 UTC35m
2026-07-22 SWA2250 OAK → LAS Jul 22, 02:15 UTCJul 22, 03:45 UTC1h 30m
2026-07-22 SWA819 SJC → SEA Jul 22, 00:00 UTCJul 22, 01:05 UTC1h 5m
2026-07-21 SWA4540 LAS → SAN Jul 21, 21:45 UTCJul 21, 22:30 UTC45m
2026-07-21 SWA546 BNA → LAS Jul 21, 17:00 UTCJul 21, 20:20 UTC3h 20m
2026-07-21 SWA1761 BWI → BOS Jul 21, 14:45 UTCJul 21, 15:50 UTC1h 5m
2026-07-21 SWA1761 BWI → BOS Jul 21, 12:40 UTCJul 21, 13:35 UTC55m
2026-07-21 SWA2206 MDW → MCO Jul 21, 00:15 UTCJul 21, 04:20 UTC4h 5m
2026-07-21 SWA2206 MDW → MCO Jul 21, 00:15 UTCJul 21, 04:19 UTC4h 4m
2026-07-20 SWA790 DEN → SJC Jul 20, 21:25 UTCJul 20, 22:10 UTC45m
2026-07-20 SWA3661 SJC → BUR Jul 20, 19:15 UTCJul 20, 20:05 UTC50m
2026-07-20 SWA3661 SJC → BUR Jul 20, 19:13 UTCJul 20, 20:03 UTC50m
2026-07-20 SWA3336 PHX → SJC Jul 20, 16:50 UTCJul 20, 18:15 UTC1h 25m
2026-07-20 SWA3336 PHX → SJC Jul 20, 16:50 UTCJul 20, 18:15 UTC1h 25m
2026-07-20 SWA3336 DEN → PHX Jul 20, 14:30 UTCJul 20, 15:55 UTC1h 25m
2026-07-20 SWA1676 - Jul 20, 11:25 UTCJul 20, 12:45 UTC1h 20m
2026-07-20 SWA58 HOU → DAL Jul 20, 06:20 UTCJul 20, 07:00 UTC40m
2026-07-20 SWA58 HOU → DAL Jul 20, 06:18 UTCJul 20, 06:57 UTC39m
2026-07-20 SWA4015 MCI → SRQ Jul 20, 00:50 UTCJul 20, 02:55 UTC2h 5m
2026-07-19 SWA1507 - Jul 19, 20:30 UTCJul 19, 22:25 UTC1h 55m
2026-07-19 SWA1507 - Jul 19, 18:25 UTCJul 19, 19:10 UTC45m
2026-07-19 SWA1507 STL → RDU Jul 19, 15:25 UTCJul 19, 16:55 UTC1h 30m

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 N955WN page for operator, model, and routing details .

Mode-S AD493B frequently asked

What is Mode-S code AD493B?
AD493B is an ICAO 24-bit transponder address. Allocated to United States. Assigned to N955WN.
Where is Mode-S AD493B registered?
Mode-S code AD493B 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 AD493B 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 AD493B, octal 53244473, decimal 11,356,475.
What flights does AD493B operate?
Mode-S AD493B has broadcast 20 distinct callsigns, including SWA3335, SWA3281, SWA3243, SWA278, SWA1372.