Apparatus

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sensors Mode-S transponder

AD2573

ICAO 24-bit transponder address · allocated to United States

Currently assigned to N946WN · BOEING 737-700 · operated by SOUTHWEST AIRLINES CO

Hex
AD2573
Octal
53222563
Decimal
11,347,315
Country
US
Tail
N946WN
Type
B737
No current signal · last broadcast Jul 26, 22:45 UTC
Flights observed
779
Distinct callsigns
20
Country
US
Last broadcast
Jul 26, 22:45 UTC

Last known position

Most recent position reported by Mode-S AD2573.

Country allocation

The ICAO 24-bit address AD2573 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
SWA2137 Southwest Airlines 10 2026-05-30
SWA556 Southwest Airlines 6 2026-07-24
SWA2803 - 6 2026-06-14
SWA1702 - 6 2026-07-24
SWA7 Southwest Airlines 5 2026-05-30
SWA3335 Southwest Airlines 5 2026-07-23
SWA2360 - 5 2026-07-08
SWA1758 Southwest Airlines 5 2026-04-30
SWA133 - 5 2026-07-06
SWA1288 Southwest Airlines 5 2026-06-09
SWA1144 Southwest Airlines 5 2026-04-26
SWA9005 Southwest Airlines 4 2026-07-18
SWA692 - 4 2026-07-02
SWA3937 - 4 2026-07-18
SWA3702 Southwest Airlines 4 2026-07-23
SWA3638 - 4 2026-07-13
SWA3363 Southwest Airlines 4 2026-06-14
SWA3155 - 4 2026-07-21
SWA2700 Southwest Airlines 4 2026-04-28
SWA27 - 4 2026-07-11

Recent flights last 50

DateFlightRouteTakeoffLandingDuration
2026-07-26 SWA1690 SDF → TPA Jul 26, 21:25 UTCJul 26, 22:45 UTC1h 20m
2026-07-26 SWA2092 SNA → OAK Jul 26, 19:05 UTCJul 26, 20:25 UTC1h 20m
2026-07-26 SWA2092 SNA → OAK Jul 26, 19:04 UTCJul 26, 20:27 UTC1h 23m
2026-07-26 SWA1988 DEN → OAK Jul 26, 16:20 UTCJul 26, 18:15 UTC1h 55m
2026-07-26 SWA4498 TUL → PHX Jul 26, 12:35 UTCJul 26, 15:15 UTC2h 40m
2026-07-26 SWA3788 DEN → DAL Jul 26, 03:35 UTCJul 26, 04:35 UTC1h 0m
2026-07-26 SWA3788 DEN → DAL Jul 26, 03:30 UTCJul 26, 04:35 UTC1h 5m
2026-07-25 SWA3350 SJC → BUR Jul 25, 23:10 UTCJul 26, 02:45 UTC3h 35m
2026-07-25 SWA3350 SJC → BUR Jul 25, 23:09 UTCJul 26, 02:40 UTC3h 31m
2026-07-25 SWA1111 BUR → OAK Jul 25, 19:55 UTCJul 25, 21:45 UTC1h 50m
2026-07-25 SWA1111 BUR → OAK Jul 25, 19:54 UTCJul 25, 21:43 UTC1h 50m
2026-07-25 SWA1247 LAS → OAK Jul 25, 17:40 UTCJul 25, 18:45 UTC1h 5m
2026-07-25 SWA1247 LAS → OAK Jul 25, 17:39 UTCJul 25, 18:39 UTC1h 0m
2026-07-25 SWA1934 ISP → BWI Jul 25, 15:45 UTCJul 25, 16:55 UTC1h 10m
2026-07-25 SWA1195 KOA → SJC Jul 25, 11:30 UTCJul 25, 14:20 UTC2h 50m
2026-07-25 SWA2457 MDW → MCO Jul 25, 01:15 UTCJul 25, 04:55 UTC3h 40m
2026-07-25 SWA2457 MDW → MCO Jul 25, 01:13 UTCJul 25, 04:50 UTC3h 37m
2026-07-24 SWA556 HOU → SJC Jul 24, 22:35 UTCJul 25, 00:20 UTC1h 45m
2026-07-24 SWA556 HOU → SJC Jul 24, 20:45 UTCJul 24, 21:35 UTC50m
2026-07-24 SWA2083 - Jul 24, 18:50 UTCJul 24, 19:30 UTC40m
2026-07-24 SWA1702 - Jul 24, 16:45 UTCJul 24, 17:50 UTC1h 5m
2026-07-24 SWA1702 MKE → MCI Jul 24, 16:44 UTCJul 24, 17:49 UTC1h 5m
2026-07-24 SWA1702 - Jul 24, 15:40 UTCJul 24, 16:00 UTC20m
2026-07-24 SWA4316 BWI → SAN Jul 24, 13:35 UTCJul 24, 14:40 UTC1h 5m
2026-07-24 SWA4316 BWI → SAN Jul 24, 13:33 UTCJul 24, 14:31 UTC59m
2026-07-24 SWA1374 DEN → AUS Jul 24, 01:30 UTCJul 24, 02:50 UTC1h 20m
2026-07-23 SWA1374 DEN → AUS Jul 23, 22:10 UTCJul 24, 00:30 UTC2h 20m
2026-07-23 SWA114 LAS → SAN Jul 23, 18:15 UTCJul 23, 20:45 UTC2h 30m
2026-07-23 SWA114 LAS → SAN Jul 23, 16:30 UTCJul 23, 17:15 UTC45m
2026-07-23 SWA114 LAS → SAN Jul 23, 13:35 UTCJul 23, 15:30 UTC1h 55m
2026-07-23 SWA1220 LAX → OAK Jul 23, 11:55 UTCJul 23, 12:20 UTC25m
2026-07-23 SWA3335 LAS → SDF Jul 23, 03:45 UTCJul 23, 05:05 UTC1h 20m
2026-07-23 SWA3335 LAS → SDF Jul 23, 03:44 UTCJul 23, 05:05 UTC1h 21m
2026-07-23 SWA3702 OAK → HOU Jul 23, 02:05 UTCJul 23, 03:00 UTC55m
2026-07-23 SWA3702 OAK → HOU Jul 23, 02:02 UTCJul 23, 02:56 UTC55m
2026-07-22 SWA3702 OAK → HOU Jul 22, 23:55 UTCJul 23, 01:00 UTC1h 5m
2026-07-22 SWA3702 OAK → HOU Jul 22, 21:30 UTCJul 22, 22:15 UTC45m
2026-07-22 SWA4978 MKE → PHX Jul 22, 19:20 UTCJul 22, 20:20 UTC1h 0m
2026-07-22 SWA2753 - Jul 22, 17:30 UTCJul 22, 18:15 UTC45m
2026-07-22 SWA2753 SBA → OAK Jul 22, 17:27 UTCJul 22, 18:10 UTC43m
2026-07-22 SWA3601 PHX → ORD Jul 22, 15:50 UTCJul 22, 16:40 UTC50m
2026-07-22 SWA854 LAS → DAL Jul 22, 03:00 UTCJul 22, 03:55 UTC55m
2026-07-22 SWA678 DAL → LGA Jul 22, 01:10 UTCJul 22, 02:05 UTC55m
2026-07-21 SWA3155 POC → OAK Jul 21, 23:05 UTCJul 21, 23:55 UTC50m
2026-07-21 SWA3155 ONT → OAK Jul 21, 23:02 UTCJul 21, 23:55 UTC53m
2026-07-21 SWA3155 LAS → ONT Jul 21, 21:30 UTCJul 21, 22:05 UTC35m
2026-07-21 SWA3124 BUR → LAS Jul 21, 19:45 UTCJul 21, 20:25 UTC40m
2026-07-21 SWA3124 BUR → LAS Jul 21, 19:41 UTCJul 21, 20:21 UTC40m
2026-07-21 SWA461 BOS → BWI Jul 21, 17:45 UTCJul 21, 18:40 UTC55m
2026-07-21 SWA4356 SJC → GEG Jul 21, 15:30 UTCJul 21, 16:40 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 N946WN page for operator, model, and routing details .

Mode-S AD2573 frequently asked

What is Mode-S code AD2573?
AD2573 is an ICAO 24-bit transponder address. Allocated to United States. Assigned to N946WN.
Where is Mode-S AD2573 registered?
Mode-S code AD2573 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 AD2573 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 AD2573, octal 53222563, decimal 11,347,315.
What flights does AD2573 operate?
Mode-S AD2573 has broadcast 20 distinct callsigns, including SWA2137, SWA556, SWA2803, SWA1702, SWA7.