Apparatus

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sensors Mode-S transponder

AC712D

ICAO 24-bit transponder address · allocated to United States

Currently assigned to N900WN · BOEING 737-700 · operated by SOUTHWEST AIRLINES CO

Hex
AC712D
Octal
53070455
Decimal
11,301,165
Country
US
Tail
N900WN
Type
B737
No current signal · last broadcast 3h ago
Flights observed
674
Distinct callsigns
20
Country
US
Last broadcast
3h ago

Last known position

Most recent position reported by Mode-S AC712D.

Country allocation

The ICAO 24-bit address AC712D 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
SWA714 - 7 2026-07-10
SWA2379 Southwest Airlines 7 2026-05-05
SWA375 - 5 2026-06-25
SWA19 Southwest Airlines 5 2026-05-08
SWA1227 Southwest Airlines 5 2026-05-06
SWA868 - 4 2026-06-19
SWA866 Southwest Airlines 4 2026-06-02
SWA704 - 4 2026-07-04
SWA670 - 4 2026-06-13
SWA434 - 4 2026-06-28
SWA3546 - 4 2026-06-22
SWA3235 Southwest Airlines 4 2026-04-15
SWA314 Southwest Airlines 4 2026-05-09
SWA2748 Southwest Airlines 4 2026-04-27
SWA2636 Southwest Airlines 4 2026-06-13
SWA2563 - 4 2026-07-13
SWA192 Southwest Airlines 4 2026-07-04
SWA1739 - 4 2026-07-03
SWA1655 Southwest Airlines 4 2026-05-23
SWA1101 - 4 2026-07-11

Recent flights last 50

DateFlightRouteTakeoffLandingDuration
2026-07-14 SWA3473 - Jul 14, 03:10 UTCJul 14, 04:25 UTC1h 15m
2026-07-14 SWA3570 - Jul 14, 00:35 UTCJul 14, 01:50 UTC1h 15m
2026-07-13 SWA4970 - Jul 13, 20:25 UTCJul 13, 22:50 UTC2h 25m
2026-07-13 SWA2563 - Jul 13, 16:30 UTCJul 13, 19:00 UTC2h 30m
2026-07-13 SWA2563 - Jul 13, 13:20 UTCJul 13, 15:35 UTC2h 15m
2026-07-13 SWA3201 SJC → PHX Jul 13, 06:47 UTCJul 13, 08:22 UTC1h 35m
2026-07-13 SWA3201 SJC → PHX Jul 13, 06:50 UTCJul 13, 08:20 UTC1h 30m
2026-07-13 SWA3541 SAN → SJC Jul 13, 05:02 UTCJul 13, 05:56 UTC54m
2026-07-13 SWA3541 - Jul 13, 05:05 UTCJul 13, 06:01 UTC55m
2026-07-13 SWA2851 SFO → SAN Jul 13, 02:35 UTCJul 13, 03:50 UTC1h 15m
2026-07-12 SWA2620 - Jul 12, 23:50 UTCJul 13, 01:01 UTC1h 10m
2026-07-12 SWA2620 SAN → SFO Jul 12, 23:48 UTCJul 13, 00:56 UTC1h 8m
2026-07-12 SWA1293 SJC → SAN Jul 12, 21:15 UTCJul 12, 22:25 UTC1h 10m
2026-07-12 SWA2802 SAN → SJC Jul 12, 19:15 UTCJul 12, 20:10 UTC55m
2026-07-12 SWA2802 SAN → SJC Jul 12, 19:15 UTCJul 12, 20:10 UTC55m
2026-07-12 SWA588 SFO → SAN Jul 12, 17:05 UTCJul 12, 18:20 UTC1h 15m
2026-07-12 SWA4607 SAN → SFO Jul 12, 15:11 UTCJul 12, 16:09 UTC58m
2026-07-12 SWA4607 - Jul 12, 15:15 UTCJul 12, 16:15 UTC1h 0m
2026-07-12 SWA3653 - Jul 12, 06:10 UTCJul 12, 07:20 UTC1h 10m
2026-07-11 SWA1101 - Jul 11, 23:35 UTCJul 12, 03:15 UTC3h 40m
2026-07-11 SWA1101 BWI → SFO Jul 11, 23:34 UTCJul 12, 04:55 UTC5h 22m
2026-07-11 SWA1101 BOS → BWI Jul 11, 21:05 UTCJul 11, 22:30 UTC1h 25m
2026-07-11 SWA1101 - Jul 11, 17:15 UTCJul 11, 19:40 UTC2h 25m
2026-07-11 SWA385 - Jul 11, 12:05 UTCJul 11, 13:15 UTC1h 10m
2026-07-11 SWA385 MCO → MCI Jul 11, 12:01 UTCJul 11, 14:21 UTC2h 20m
2026-07-11 SWA4590 LAS → MCO Jul 11, 06:10 UTCJul 11, 10:20 UTC4h 10m
2026-07-11 SWA1324 SMF → LAS Jul 11, 02:48 UTCJul 11, 03:50 UTC1h 2m
2026-07-11 SWA4500 - Jul 11, 00:50 UTCJul 11, 01:50 UTC1h 0m
2026-07-10 SWA4500 - Jul 10, 23:10 UTCJul 10, 23:50 UTC40m
2026-07-10 SWA714 - Jul 10, 21:10 UTCJul 10, 22:15 UTC1h 5m
2026-07-10 SWA714 - Jul 10, 18:45 UTCJul 10, 20:05 UTC1h 20m
2026-07-10 SWA4601 - Jul 10, 16:00 UTCJul 10, 17:40 UTC1h 40m
2026-07-10 SWA1884 GEG → PHX Jul 10, 12:35 UTCJul 10, 14:45 UTC2h 10m
2026-07-10 SWA2805 SMF → GEG Jul 10, 04:50 UTCJul 10, 06:15 UTC1h 25m
2026-07-10 SWA3550 SAN → SMF Jul 10, 02:40 UTCJul 10, 03:50 UTC1h 10m
2026-07-10 SWA3550 SAN → SMF Jul 10, 02:40 UTCJul 10, 03:51 UTC1h 11m
2026-07-10 SWA3994 - Jul 10, 00:35 UTCJul 10, 01:45 UTC1h 10m
2026-07-09 SWA2407 - Jul 9, 22:25 UTCJul 9, 23:40 UTC1h 15m
2026-07-09 SWA2407 BNA → LAS Jul 9, 18:05 UTCJul 9, 21:25 UTC3h 20m
2026-07-09 SWA2407 MSY → BNA Jul 9, 15:35 UTCJul 9, 16:50 UTC1h 15m
2026-07-09 SWA1796 - Jul 9, 13:00 UTCJul 9, 13:40 UTC40m
2026-07-09 SWA1796 HOU → MSY Jul 9, 12:55 UTCJul 9, 13:37 UTC42m
2026-07-09 SWA3919 - Jul 9, 10:05 UTCJul 9, 11:45 UTC1h 40m
2026-07-09 SWA1338 - Jul 9, 02:15 UTCJul 9, 03:35 UTC1h 20m
2026-07-08 SWA208 - Jul 8, 23:40 UTCJul 9, 00:25 UTC45m
2026-07-08 SWA2757 - Jul 8, 22:00 UTCJul 8, 22:40 UTC40m
2026-07-08 SWA2757 - Jul 8, 19:10 UTCJul 8, 20:50 UTC1h 40m
2026-07-08 SWA2757 - Jul 8, 17:15 UTCJul 8, 18:15 UTC1h 0m
2026-07-08 SWA1052 - Jul 8, 15:30 UTCJul 8, 16:05 UTC35m
2026-07-08 SWA1052 DEN → BWI Jul 8, 11:15 UTCJul 8, 14:20 UTC3h 5m

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 N900WN page for operator, model, and routing details .

Mode-S AC712D frequently asked

What is Mode-S code AC712D?
AC712D is an ICAO 24-bit transponder address. Allocated to United States. Assigned to N900WN.
Where is Mode-S AC712D registered?
Mode-S code AC712D 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 AC712D broadcasting right now?
No active broadcast right now. Last signal was 3h ago.
Hex, octal, and decimal Mode-S codes: what's the difference?
The same 24-bit identifier expressed in different bases: hex AC712D, octal 53070455, decimal 11,301,165.
What flights does AC712D operate?
Mode-S AC712D has broadcast 20 distinct callsigns, including SWA714, SWA2379, SWA375, SWA19, SWA1227.