Apparatus

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sensors Mode-S transponder

AC3ADF

ICAO 24-bit transponder address · allocated to United States

Currently assigned to N8875B · BOEING 737 MAX 8 · operated by SOUTHWEST AIRLINES CO

Hex
AC3ADF
Octal
53035337
Decimal
11,287,263
Country
US
Tail
N8875B
Type
B38M
No current signal · last broadcast Jul 26, 20:40 UTC
Flights observed
692
Distinct callsigns
20
Country
US
Last broadcast
Jul 26, 20:40 UTC

Last known position

Most recent position reported by Mode-S AC3ADF.

Country allocation

The ICAO 24-bit address AC3ADF 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
SWA2280 - 6 2026-07-06
SWA1966 Southwest Airlines 6 2026-06-14
SWA1301 Southwest Airlines 6 2026-06-22
SWA4281 Southwest Airlines 5 2026-07-18
SWA427 - 5 2026-06-25
SWA862 Southwest Airlines 4 2026-05-06
SWA840 Southwest Airlines 4 2026-05-28
SWA3717 - 4 2026-06-25
SWA3152 - 4 2026-06-17
SWA2391 Southwest Airlines 4 2026-06-21
SWA2234 - 4 2026-07-12
SWA2112 - 4 2026-07-13
SWA1933 - 4 2026-04-13
SWA1395 Southwest Airlines 4 2026-05-09
SWA1377 - 4 2026-07-02
SWA1316 - 4 2026-07-16
SWA1223 - 4 2026-04-15
SWA936 - 3 2026-07-11
SWA761 Southwest Airlines 3 2026-07-25
SWA576 - 3 2026-06-24

Recent flights last 50

DateFlightRouteTakeoffLandingDuration
2026-07-26 SWA3245 OAK → DAL Jul 26, 19:20 UTCJul 26, 20:40 UTC1h 20m
2026-07-26 SWA1960 DAL → TPA Jul 26, 15:15 UTCJul 26, 17:55 UTC2h 40m
2026-07-26 SWA3246 SJC → PHX Jul 26, 11:20 UTCJul 26, 13:55 UTC2h 35m
2026-07-25 SWA761 PHX → DEN Jul 25, 22:25 UTCJul 25, 22:55 UTC30m
2026-07-25 SWA761 PHX → DEN Jul 25, 22:21 UTCJul 25, 22:51 UTC30m
2026-07-25 SWA761 PHX → DEN Jul 25, 18:25 UTCJul 25, 21:20 UTC2h 55m
2026-07-25 SWA4325 DEN → SNA Jul 25, 16:50 UTCJul 25, 17:15 UTC25m
2026-07-25 SWA192 STL → DAL Jul 25, 13:30 UTCJul 25, 15:00 UTC1h 30m
2026-07-25 SWA192 STL → DAL Jul 25, 10:45 UTCJul 25, 12:25 UTC1h 40m
2026-07-25 SWA1472 PHX → OAK Jul 25, 02:20 UTCJul 25, 04:40 UTC2h 20m
2026-07-25 SWA1472 PHX → OAK Jul 25, 02:15 UTCJul 25, 04:38 UTC2h 23m
2026-07-24 SWA3617 DEN → OAK Jul 24, 22:45 UTCJul 25, 00:50 UTC2h 5m
2026-07-24 SWA3981 BNA → CHS Jul 24, 17:00 UTCJul 24, 20:55 UTC3h 55m
2026-07-24 SWA3981 BNA → CHS Jul 24, 16:58 UTCJul 24, 20:40 UTC3h 42m
2026-07-24 SWA1411 LGB → OAK Jul 24, 14:30 UTCJul 24, 15:50 UTC1h 20m
2026-07-24 SWA2341 RNO → SAN Jul 24, 10:20 UTCJul 24, 13:20 UTC3h 0m
2026-07-24 SWA2190 LAX → SFO Jul 24, 00:20 UTCJul 24, 03:30 UTC3h 10m
2026-07-24 SWA2190 LAX → SFO Jul 24, 00:19 UTCJul 24, 03:29 UTC3h 11m
2026-07-23 SWA3782 ATL → MSY Jul 23, 18:55 UTCJul 23, 22:20 UTC3h 25m
2026-07-23 SWA3782 ATL → MSY Jul 23, 18:51 UTCJul 23, 22:19 UTC3h 28m
2026-07-23 SWA4362 TPA → LGA Jul 23, 13:40 UTCJul 23, 17:20 UTC3h 40m
2026-07-23 SWA4362 TPA → LGA Jul 23, 13:36 UTCJul 23, 17:15 UTC3h 39m
2026-07-23 SWA3471 DEN → SAN Jul 23, 10:20 UTCJul 23, 12:35 UTC2h 15m
2026-07-23 SWA3471 DEN → SAN Jul 23, 10:17 UTCJul 23, 12:30 UTC2h 13m
2026-07-22 SWA658 PVD → MCO Jul 22, 23:50 UTCJul 23, 01:35 UTC1h 45m
2026-07-22 SWA4658 - Jul 22, 21:05 UTCJul 22, 22:15 UTC1h 10m
2026-07-22 SWA4658 MKE → BNA Jul 22, 21:00 UTCJul 22, 22:10 UTC1h 10m
2026-07-22 SWA203 BWI → BDL Jul 22, 17:05 UTCJul 22, 19:55 UTC2h 50m
2026-07-22 SWA203 BWI → BDL Jul 22, 17:00 UTCJul 22, 19:48 UTC2h 48m
2026-07-22 SWA2895 LAS → SJC Jul 22, 13:40 UTCJul 22, 15:50 UTC2h 10m
2026-07-22 SWA3919 MDW → STL Jul 22, 11:25 UTCJul 22, 12:25 UTC1h 0m
2026-07-22 SWA22 DAL → AMA Jul 22, 00:35 UTCJul 22, 03:10 UTC2h 35m
2026-07-21 SWA639 MCO → PHL Jul 21, 20:05 UTCJul 21, 23:10 UTC3h 5m
2026-07-21 SWA639 MCO → PHL Jul 21, 20:00 UTCJul 21, 23:05 UTC3h 5m
2026-07-21 SWA1370 BWI → ALB Jul 21, 17:35 UTCJul 21, 18:40 UTC1h 5m
2026-07-21 SWA1370 BWI → ALB Jul 21, 15:05 UTCJul 21, 16:20 UTC1h 15m
2026-07-21 SWA1370 BWI → ALB Jul 21, 12:15 UTCJul 21, 13:55 UTC1h 40m
2026-07-21 SWA2304 SEA → MDW Jul 21, 06:50 UTCJul 21, 10:05 UTC3h 15m
2026-07-21 SWA1716 DEN → SEA Jul 21, 02:25 UTCJul 21, 04:50 UTC2h 25m
2026-07-20 SWA3617 DEN → OAK Jul 20, 22:25 UTCJul 21, 00:30 UTC2h 5m
2026-07-20 SWA3981 STL → SEA Jul 20, 17:20 UTCJul 20, 21:05 UTC3h 45m
2026-07-20 SWA1411 LGB → OAK Jul 20, 14:45 UTCJul 20, 16:05 UTC1h 20m
2026-07-20 SWA2341 LGA → DAL Jul 20, 10:25 UTCJul 20, 13:20 UTC2h 55m
2026-07-20 SWA200 BUR → OAK Jul 20, 02:15 UTCJul 20, 04:05 UTC1h 50m
2026-07-19 SWA4684 DEN → SFO Jul 19, 23:20 UTCJul 20, 01:00 UTC1h 40m
2026-07-19 SWA2647 - Jul 19, 19:20 UTCJul 19, 21:50 UTC2h 30m
2026-07-19 SWA2647 SNA → AUS Jul 19, 19:15 UTCJul 19, 21:45 UTC2h 30m
2026-07-19 SWA4175 - Jul 19, 16:05 UTCJul 19, 17:50 UTC1h 45m
2026-07-19 SWA2966 - Jul 19, 13:15 UTCJul 19, 13:45 UTC30m
2026-07-19 SWA2966 LAS → DEN Jul 19, 13:14 UTCJul 19, 14:40 UTC1h 26m

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 N8875B page for operator, model, and routing details .

Mode-S AC3ADF frequently asked

What is Mode-S code AC3ADF?
AC3ADF is an ICAO 24-bit transponder address. Allocated to United States. Assigned to N8875B.
Where is Mode-S AC3ADF registered?
Mode-S code AC3ADF 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 AC3ADF broadcasting right now?
No active broadcast right now. Last signal was Jul 26, 20:40 UTC.
Hex, octal, and decimal Mode-S codes: what's the difference?
The same 24-bit identifier expressed in different bases: hex AC3ADF, octal 53035337, decimal 11,287,263.
What flights does AC3ADF operate?
Mode-S AC3ADF has broadcast 20 distinct callsigns, including SWA2280, SWA1966, SWA1301, SWA4281, SWA427.