Apparatus

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sensors Mode-S transponder

AD12E0

ICAO 24-bit transponder address · allocated to United States

Currently assigned to N941WN · BOEING 737-700 · operated by SOUTHWEST AIRLINES CO

Hex
AD12E0
Octal
53211340
Decimal
11,342,560
Country
US
Tail
N941WN
Type
B737
No current signal · last broadcast Jul 26, 21:45 UTC
Flights observed
730
Distinct callsigns
20
Country
US
Last broadcast
Jul 26, 21:45 UTC

Last known position

Most recent position reported by Mode-S AD12E0.

Country allocation

The ICAO 24-bit address AD12E0 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
SWA1418 Southwest Airlines 9 2026-05-26
SWA868 - 6 2026-07-04
SWA371 - 6 2026-06-23
SWA1219 Southwest Airlines 6 2026-05-23
SWA775 Southwest Airlines 5 2026-04-13
SWA3463 Southwest Airlines 5 2026-04-27
SWA2654 Southwest Airlines 5 2026-06-01
SWA9003 - 4 2026-07-14
SWA836 Southwest Airlines 4 2026-07-23
SWA4643 Southwest Airlines 4 2026-05-25
SWA444 - 4 2026-07-04
SWA3548 - 4 2026-04-14
SWA3403 Southwest Airlines 4 2026-05-14
SWA2673 - 4 2026-07-02
SWA2411 - 4 2026-07-17
SWA1645 - 4 2026-06-30
SWA164 - 4 2026-06-12
SWA1472 Southwest Airlines 4 2026-04-15
SWA962 - 3 2026-07-08
SWA858 Southwest Airlines 3 2026-06-11

Recent flights last 50

DateFlightRouteTakeoffLandingDuration
2026-07-26 SWA3345 MHT → MDW Jul 26, 20:35 UTCJul 26, 21:45 UTC1h 10m
2026-07-26 SWA1179 PHX → SFO Jul 26, 17:10 UTCJul 26, 18:55 UTC1h 45m
2026-07-26 SWA3568 MDW → ATL Jul 26, 00:05 UTCJul 26, 01:50 UTC1h 45m
2026-07-25 SWA4834 MCO → MDW Jul 25, 20:20 UTCJul 25, 22:30 UTC2h 10m
2026-07-25 SWA4834 MCO → MDW Jul 25, 20:15 UTCJul 25, 22:26 UTC2h 11m
2026-07-25 SWA215 ATL → MCO Jul 25, 18:00 UTCJul 25, 19:00 UTC1h 0m
2026-07-25 SWA215 ATL → MCO Jul 25, 17:59 UTCJul 25, 18:56 UTC57m
2026-07-25 SWA215 STL → ATL Jul 25, 15:45 UTCJul 25, 17:00 UTC1h 15m
2026-07-25 SWA4809 SJC → LAS Jul 25, 12:55 UTCJul 25, 14:45 UTC1h 50m
2026-07-25 SWA4809 SJC → LAS Jul 25, 12:50 UTCJul 25, 14:37 UTC1h 47m
2026-07-25 SWA4526 LGB → SLC Jul 25, 05:50 UTCJul 25, 08:00 UTC2h 10m
2026-07-25 SWA4526 LGB → SLC Jul 25, 05:45 UTCJul 25, 08:09 UTC2h 24m
2026-07-25 SWA137 STL → JAX Jul 25, 03:15 UTCJul 25, 04:30 UTC1h 15m
2026-07-24 SWA4634 MDW → MSP Jul 24, 22:20 UTCJul 24, 23:10 UTC50m
2026-07-24 SWA3775 DCA → PVD Jul 24, 19:10 UTCJul 24, 21:05 UTC1h 55m
2026-07-24 SWA3775 DCA → PVD Jul 24, 19:10 UTCJul 24, 21:03 UTC1h 53m
2026-07-24 SWA4454 - Jul 24, 16:35 UTCJul 24, 17:35 UTC1h 0m
2026-07-24 SWA1840 BOS → BWI Jul 24, 14:24 UTCJul 24, 15:31 UTC1h 7m
2026-07-24 SWA1840 BOS → BWI Jul 24, 14:25 UTCJul 24, 15:30 UTC1h 5m
2026-07-24 SWA1840 BOS → BWI Jul 24, 12:05 UTCJul 24, 13:10 UTC1h 5m
2026-07-24 SWA291 RNO → SAN Jul 24, 03:35 UTCJul 24, 04:30 UTC55m
2026-07-24 SWA717 RNO → LGB Jul 24, 01:40 UTCJul 24, 02:50 UTC1h 10m
2026-07-24 SWA717 RNO → LGB Jul 24, 01:37 UTCJul 24, 02:44 UTC1h 7m
2026-07-23 SWA776 PHX → DAL Jul 23, 23:20 UTCJul 24, 00:50 UTC1h 30m
2026-07-23 SWA4931 FLL → MDW Jul 23, 21:45 UTCJul 23, 22:30 UTC45m
2026-07-23 SWA836 PHX → SJC Jul 23, 20:00 UTCJul 23, 20:50 UTC50m
2026-07-23 SWA3765 OAK → LAS Jul 23, 18:20 UTCJul 23, 19:15 UTC55m
2026-07-23 SWA3765 OAK → LAS Jul 23, 18:17 UTCJul 23, 19:11 UTC54m
2026-07-23 SWA2638 SNA → SJC Jul 23, 16:30 UTCJul 23, 17:25 UTC55m
2026-07-23 SWA3442 DEN → BOS Jul 23, 14:10 UTCJul 23, 15:10 UTC1h 0m
2026-07-23 SWA3063 SNA → OAK Jul 23, 02:35 UTCJul 23, 05:55 UTC3h 20m
2026-07-22 SWA4017 DAL → ELP Jul 22, 21:40 UTCJul 22, 23:15 UTC1h 35m
2026-07-22 SWA1029 OAK → DEN Jul 22, 19:10 UTCJul 22, 20:30 UTC1h 20m
2026-07-22 SWA1029 OAK → DEN Jul 22, 16:55 UTCJul 22, 17:45 UTC50m
2026-07-22 SWA3716 - Jul 22, 15:00 UTCJul 22, 15:50 UTC50m
2026-07-21 SWA1427 LGA → BNA Jul 21, 23:45 UTCJul 22, 03:25 UTC3h 40m
2026-07-21 SWA1427 LGA → BNA Jul 21, 21:00 UTCJul 21, 22:30 UTC1h 30m
2026-07-21 SWA1908 MCO → DCA Jul 21, 13:55 UTCJul 21, 15:45 UTC1h 50m
2026-07-21 SWA1908 MCO → DCA Jul 21, 13:54 UTCJul 21, 15:44 UTC1h 50m
2026-07-21 SWA212 AUS → BNA Jul 21, 11:50 UTCJul 21, 12:50 UTC1h 0m
2026-07-21 SWA2179 - Jul 21, 06:15 UTCJul 21, 09:50 UTC3h 35m
2026-07-21 SWA1169 HNL → SJC Jul 21, 03:30 UTCJul 21, 04:30 UTC1h 0m
2026-07-21 SWA1169 HNL → SJC Jul 21, 01:30 UTCJul 21, 02:40 UTC1h 10m
2026-07-20 SWA4096 OGG → OAK Jul 20, 22:05 UTCJul 21, 00:15 UTC2h 10m
2026-07-20 SWA859 SLC → DEN Jul 20, 19:00 UTCJul 20, 21:05 UTC2h 5m
2026-07-20 SWA3500 SJC → SAN Jul 20, 15:45 UTCJul 20, 17:55 UTC2h 10m
2026-07-20 SWA1526 SJC → BUR Jul 20, 04:45 UTCJul 20, 05:55 UTC1h 10m
2026-07-20 SWA1526 SJC → BUR Jul 20, 04:45 UTCJul 20, 05:56 UTC1h 11m
2026-07-20 SWA575 TPA → LGA Jul 20, 01:55 UTCJul 20, 03:20 UTC1h 25m
2026-07-19 SWA3585 - Jul 19, 22:10 UTCJul 20, 00:35 UTC2h 25m

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 N941WN page for operator, model, and routing details .

Mode-S AD12E0 frequently asked

What is Mode-S code AD12E0?
AD12E0 is an ICAO 24-bit transponder address. Allocated to United States. Assigned to N941WN.
Where is Mode-S AD12E0 registered?
Mode-S code AD12E0 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 AD12E0 broadcasting right now?
No active broadcast right now. Last signal was Jul 26, 21:45 UTC.
Hex, octal, and decimal Mode-S codes: what's the difference?
The same 24-bit identifier expressed in different bases: hex AD12E0, octal 53211340, decimal 11,342,560.
What flights does AD12E0 operate?
Mode-S AD12E0 has broadcast 20 distinct callsigns, including SWA1418, SWA868, SWA371, SWA1219, SWA775.