Apparatus

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sensors Mode-S transponder

AC425A

ICAO 24-bit transponder address · allocated to United States

Currently assigned to N8895Q · BOEING 737 MAX 8 · operated by SOUTHWEST AIRLINES CO

Hex
AC425A
Octal
53041132
Decimal
11,289,178
Country
US
Tail
N8895Q
Type
B38M
Broadcasting now · callsign SWA2063 · 30,250 ft
Flights observed
771
Distinct callsigns
20
Country
US
Last broadcast
Jul 26, 21:40 UTC

Current position

AC425A is currently broadcasting. Map zoomed to live position.

Country allocation

The ICAO 24-bit address AC425A 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
SWA579 Southwest Airlines 6 2026-06-01
SWA4112 Southwest Airlines 5 2026-04-16
SWA648 - 4 2026-04-13
SWA3193 Southwest Airlines 4 2026-07-23
SWA2727 Southwest Airlines 4 2026-07-21
SWA2717 - 4 2026-06-26
SWA2282 Southwest Airlines 4 2026-05-10
SWA1959 - 4 2026-07-14
SWA1932 Southwest Airlines 4 2026-05-14
SWA185 Southwest Airlines 4 2026-06-09
SWA1417 Southwest Airlines 4 2026-06-14
SWA1292 Southwest Airlines 4 2026-05-14
SWA995 Southwest Airlines 3 2026-04-28
SWA938 - 3 2026-07-15
SWA804 Southwest Airlines 3 2026-07-22
SWA677 Southwest Airlines 3 2026-05-19
SWA586 - 3 2026-07-10
SWA572 - 3 2026-07-12
SWA4020 Southwest Airlines 3 2026-07-23
SWA3890 - 3 2026-07-23

Recent flights last 50

DateFlightRouteTakeoffLandingDuration
2026-07-26 SWA285 BWI → ALB Jul 26, 19:15 UTCJul 26, 21:40 UTC2h 25m
2026-07-26 SWA1253 SAN → OAK Jul 26, 16:45 UTCJul 26, 18:05 UTC1h 20m
2026-07-26 SWA4168 OAK → LAX Jul 26, 13:15 UTCJul 26, 15:35 UTC2h 20m
2026-07-26 SWA4168 OAK → LAX Jul 26, 13:12 UTCJul 26, 15:36 UTC2h 24m
2026-07-26 SWA1644 DEN → SEA Jul 26, 00:33 UTCJul 26, 04:47 UTC4h 15m
2026-07-26 SWA1644 DEN → SEA Jul 26, 00:35 UTCJul 26, 04:55 UTC4h 20m
2026-07-25 SWA4564 MKE → FLL Jul 25, 20:15 UTCJul 25, 22:05 UTC1h 50m
2026-07-25 SWA4564 MKE → FLL Jul 25, 20:14 UTCJul 25, 22:00 UTC1h 46m
2026-07-25 SWA4012 OAK → PDX Jul 25, 16:20 UTCJul 25, 18:50 UTC2h 30m
2026-07-25 SWA3144 PVD → MDW Jul 25, 13:20 UTCJul 25, 15:05 UTC1h 45m
2026-07-25 SWA2862 BUR → SJC Jul 25, 04:15 UTCJul 25, 05:15 UTC1h 0m
2026-07-25 SWA2862 BUR → SJC Jul 25, 00:05 UTCJul 25, 03:10 UTC3h 5m
2026-07-24 SWA3202 SJC → PDX Jul 24, 19:10 UTCJul 24, 22:40 UTC3h 30m
2026-07-24 SWA1667 BNA → PHL Jul 24, 15:55 UTCJul 24, 18:05 UTC2h 10m
2026-07-24 SWA698 BWI → BDL Jul 24, 13:20 UTCJul 24, 14:45 UTC1h 25m
2026-07-24 SWA3806 SEA → OAK Jul 24, 03:55 UTCJul 24, 05:25 UTC1h 30m
2026-07-23 SWA4020 FLL → BWI Jul 23, 22:10 UTCJul 24, 01:50 UTC3h 40m
2026-07-23 SWA4020 FLL → BWI Jul 23, 22:09 UTCJul 24, 01:47 UTC3h 38m
2026-07-23 SWA3193 COS → DEN Jul 23, 19:45 UTCJul 23, 20:50 UTC1h 5m
2026-07-23 SWA3193 COS → DEN Jul 23, 16:25 UTCJul 23, 18:35 UTC2h 10m
2026-07-23 SWA3890 - Jul 23, 13:25 UTCJul 23, 15:05 UTC1h 40m
2026-07-23 SWA3890 RNO → DEN Jul 23, 13:20 UTCJul 23, 15:03 UTC1h 43m
2026-07-23 SWA1137 DCA → PVD Jul 23, 05:40 UTCJul 23, 06:35 UTC55m
2026-07-23 SWA1137 DCA → PVD Jul 23, 00:45 UTCJul 23, 04:35 UTC3h 50m
2026-07-22 SWA804 BWI → ALB Jul 22, 22:00 UTCJul 22, 23:25 UTC1h 25m
2026-07-22 SWA804 BWI → ALB Jul 22, 20:25 UTCJul 22, 23:25 UTC3h 0m
2026-07-22 SWA804 BWI → ALB Jul 22, 20:23 UTCJul 22, 21:45 UTC1h 22m
2026-07-22 SWA4249 HAF → LAS Jul 22, 18:15 UTCJul 22, 19:20 UTC1h 5m
2026-07-22 SWA1350 BWI → MCO Jul 22, 13:20 UTCJul 22, 16:20 UTC3h 0m
2026-07-22 SWA2039 LAS → OAK Jul 22, 10:20 UTCJul 22, 11:35 UTC1h 15m
2026-07-22 SWA1211 SJC → BUR Jul 22, 02:30 UTCJul 22, 04:25 UTC1h 55m
2026-07-21 SWA968 BUR → LAS Jul 21, 22:25 UTCJul 22, 00:25 UTC2h 0m
2026-07-21 SWA968 BUR → LAS Jul 21, 22:23 UTCJul 22, 00:20 UTC1h 58m
2026-07-21 SWA901 SAT → MDW Jul 21, 18:40 UTCJul 21, 21:10 UTC2h 30m
2026-07-21 SWA2727 TPA → PVD Jul 21, 15:15 UTCJul 21, 17:15 UTC2h 0m
2026-07-21 SWA2727 TPA → PVD Jul 21, 15:14 UTCJul 21, 17:13 UTC1h 59m
2026-07-21 SWA3288 - Jul 21, 11:20 UTCJul 21, 13:50 UTC2h 30m
2026-07-21 SWA2700 BWI → BDL Jul 21, 01:30 UTCJul 21, 03:05 UTC1h 35m
2026-07-21 SWA2700 BWI → BDL Jul 21, 01:25 UTCJul 21, 02:57 UTC1h 32m
2026-07-20 SWA3624 - Jul 20, 23:05 UTCJul 20, 23:50 UTC45m
2026-07-20 SWA3624 AUS → CVG Jul 20, 20:05 UTCJul 20, 22:15 UTC2h 10m
2026-07-20 SWA2251 - Jul 20, 16:25 UTCJul 20, 19:00 UTC2h 35m
2026-07-20 SWA2251 LAS → LAX Jul 20, 14:20 UTCJul 20, 15:05 UTC45m
2026-07-20 SWA1231 SFO → BUR Jul 20, 05:35 UTCJul 20, 06:15 UTC40m
2026-07-20 SWA1231 SFO → BUR Jul 20, 03:15 UTCJul 20, 04:30 UTC1h 15m
2026-07-20 SWA2853 SJC → BUR Jul 20, 00:20 UTCJul 20, 02:14 UTC1h 54m
2026-07-20 SWA2853 SJC → BUR Jul 20, 00:20 UTCJul 20, 02:20 UTC2h 0m
2026-07-19 SWA2791 OAK → BUR Jul 19, 19:40 UTCJul 19, 23:05 UTC3h 25m
2026-07-19 SWA4104 RSW → IND Jul 19, 15:40 UTCJul 19, 18:40 UTC3h 0m
2026-07-19 SWA4835 - Jul 19, 12:25 UTCJul 19, 14:25 UTC2h 0m

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 N8895Q page for operator, model, and routing details .

Mode-S AC425A frequently asked

What is Mode-S code AC425A?
AC425A is an ICAO 24-bit transponder address. Allocated to United States. Assigned to N8895Q.
Where is Mode-S AC425A registered?
Mode-S code AC425A 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 AC425A broadcasting right now?
Yes. Mode-S AC425A is currently airborne.
Hex, octal, and decimal Mode-S codes: what's the difference?
The same 24-bit identifier expressed in different bases: hex AC425A, octal 53041132, decimal 11,289,178.
What flights does AC425A operate?
Mode-S AC425A has broadcast 20 distinct callsigns, including SWA579, SWA4112, SWA648, SWA3193, SWA2727.