Apparatus

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sensors Mode-S transponder

AC2439

ICAO 24-bit transponder address · allocated to United States

Currently assigned to N8812Q · BOEING 737 MAX 8 · operated by SOUTHWEST AIRLINES CO

Hex
AC2439
Octal
53022071
Decimal
11,281,465
Country
US
Tail
N8812Q
Type
B38M
Broadcasting now · callsign SWA672 · 36,000 ft
Flights observed
728
Distinct callsigns
20
Country
US
Last broadcast
Jul 26, 21:50 UTC

Current position

AC2439 is currently broadcasting. Map zoomed to live position.

Country allocation

The ICAO 24-bit address AC2439 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
SWA155 Southwest Airlines 6 2026-07-26
SWA3193 Southwest Airlines 5 2026-06-15
SWA745 - 4 2026-06-26
SWA586 Southwest Airlines 4 2026-06-13
SWA582 Southwest Airlines 4 2026-07-21
SWA4716 - 4 2026-07-13
SWA3344 Southwest Airlines 4 2026-05-11
SWA3330 - 4 2026-06-28
SWA2791 Southwest Airlines 4 2026-04-16
SWA1667 Southwest Airlines 4 2026-05-12
SWA1346 Southwest Airlines 4 2026-04-24
SWA1103 - 4 2026-07-01
SWA991 Southwest Airlines 3 2026-06-12
SWA982 Southwest Airlines 3 2026-07-25
SWA961 Southwest Airlines 3 2026-05-11
SWA850 - 3 2026-07-15
SWA706 Southwest Airlines 3 2026-06-05
SWA696 - 3 2026-07-10
SWA4959 Southwest Airlines 3 2026-06-24
SWA4594 - 3 2026-07-06

Recent flights last 50

DateFlightRouteTakeoffLandingDuration
2026-07-26 SWA677 PHL → STL Jul 26, 20:25 UTCJul 26, 21:50 UTC1h 25m
2026-07-26 SWA155 DAL → MCI Jul 26, 17:15 UTCJul 26, 19:00 UTC1h 45m
2026-07-26 SWA155 DAL → MCI Jul 26, 15:20 UTCJul 26, 16:10 UTC50m
2026-07-26 SWA155 DAL → MCI Jul 26, 12:30 UTCJul 26, 14:15 UTC1h 45m
2026-07-26 SWA155 DAL → MCI Jul 26, 12:27 UTCJul 26, 14:14 UTC1h 48m
2026-07-26 SWA302 OAK → ONT Jul 26, 10:05 UTCJul 26, 11:20 UTC1h 15m
2026-07-26 SWA161 SJC → BUR Jul 26, 02:25 UTCJul 26, 03:15 UTC50m
2026-07-25 SWA4148 MDW → FLL Jul 25, 20:25 UTCJul 26, 00:48 UTC4h 23m
2026-07-25 SWA4148 MDW → FLL Jul 25, 20:30 UTCJul 26, 01:00 UTC4h 30m
2026-07-25 SWA4648 MDW → MSY Jul 25, 15:30 UTCJul 25, 19:00 UTC3h 30m
2026-07-25 SWA982 IND → BWI Jul 25, 12:50 UTCJul 25, 14:00 UTC1h 10m
2026-07-25 SWA982 IND → BWI Jul 25, 12:45 UTCJul 25, 13:54 UTC1h 9m
2026-07-25 SWA982 IND → BWI Jul 25, 10:45 UTCJul 25, 11:35 UTC50m
2026-07-25 SWA1961 SAN → SJC Jul 25, 02:00 UTCJul 25, 04:35 UTC2h 35m
2026-07-25 SWA4255 PHX → CLE Jul 25, 00:30 UTCJul 25, 01:02 UTC32m
2026-07-25 SWA4255 PHX → CLE Jul 25, 00:30 UTCJul 25, 01:05 UTC35m
2026-07-24 SWA3655 MCI → DAL Jul 24, 20:05 UTCJul 24, 23:10 UTC3h 5m
2026-07-24 SWA3162 RSW → MDW Jul 24, 18:00 UTCJul 24, 18:50 UTC50m
2026-07-24 SWA4179 LAS → BNA Jul 24, 16:20 UTCJul 24, 16:55 UTC35m
2026-07-24 SWA2365 SJC → SEA Jul 24, 11:00 UTCJul 24, 15:00 UTC4h 0m
2026-07-24 SWA2365 SJC → SEA Jul 24, 10:55 UTCJul 24, 14:53 UTC3h 58m
2026-07-24 SWA2567 SJC → SNA Jul 24, 03:10 UTCJul 24, 05:15 UTC2h 5m
2026-07-23 SWA2567 SJC → SNA Jul 23, 23:30 UTCJul 24, 02:10 UTC2h 40m
2026-07-23 SWA4844 SMF → BUR Jul 23, 20:25 UTCJul 23, 21:30 UTC1h 5m
2026-07-23 SWA781 BNA → TPA Jul 23, 17:10 UTCJul 23, 18:40 UTC1h 30m
2026-07-23 SWA2520 BWI → BDL Jul 23, 12:20 UTCJul 23, 15:30 UTC3h 10m
2026-07-23 SWA2520 BWI → BDL Jul 23, 10:10 UTCJul 23, 11:10 UTC1h 0m
2026-07-23 SWA863 BWI → PVD Jul 23, 02:30 UTCJul 23, 04:50 UTC2h 20m
2026-07-23 SWA863 BWI → PVD Jul 23, 02:25 UTCJul 23, 04:41 UTC2h 16m
2026-07-23 SWA3543 ONT → LAS Jul 23, 00:00 UTCJul 23, 01:10 UTC1h 10m
2026-07-22 SWA4975 OAK → LAS Jul 22, 20:50 UTCJul 22, 22:35 UTC1h 45m
2026-07-22 SWA4975 OAK → LAS Jul 22, 20:47 UTCJul 22, 22:26 UTC1h 39m
2026-07-22 SWA188 BWI → FLL Jul 22, 16:50 UTCJul 22, 19:30 UTC2h 40m
2026-07-22 SWA4409 SRQ → IND Jul 22, 13:05 UTCJul 22, 15:25 UTC2h 20m
2026-07-22 SWA4409 SRQ → IND Jul 22, 13:00 UTCJul 22, 15:24 UTC2h 24m
2026-07-22 SWA573 STL → PHL Jul 22, 11:25 UTCJul 22, 11:45 UTC20m
2026-07-21 SWA2733 RDU → BWI Jul 21, 17:40 UTCJul 21, 18:35 UTC55m
2026-07-21 SWA4432 DEN → AUS Jul 21, 13:20 UTCJul 21, 16:15 UTC2h 55m
2026-07-21 SWA185 ATL → LGA Jul 21, 06:30 UTCJul 21, 07:45 UTC1h 15m
2026-07-21 SWA3003 BWI → ALB Jul 21, 02:10 UTCJul 21, 05:25 UTC3h 15m
2026-07-21 SWA582 HOU → LGA Jul 21, 00:25 UTCJul 21, 01:10 UTC45m
2026-07-21 SWA582 HOU → LGA Jul 21, 00:21 UTCJul 21, 01:06 UTC45m
2026-07-20 SWA3619 DEN → BOS Jul 20, 18:55 UTCJul 20, 22:45 UTC3h 50m
2026-07-20 SWA3619 DEN → BOS Jul 20, 18:52 UTCJul 20, 22:44 UTC3h 52m
2026-07-20 SWA739 - Jul 20, 14:50 UTCJul 20, 16:45 UTC1h 55m
2026-07-20 SWA4205 SLC → LAS Jul 20, 12:40 UTCJul 20, 13:35 UTC55m
2026-07-20 SWA4205 SLC → LAS Jul 20, 12:37 UTCJul 20, 13:33 UTC56m
2026-07-20 SWA3326 PDX → OAK Jul 20, 03:30 UTCJul 20, 06:15 UTC2h 45m
2026-07-20 SWA1251 OAK → BUR Jul 20, 00:55 UTCJul 20, 01:40 UTC45m
2026-07-19 SWA1251 OAK → BUR Jul 19, 21:20 UTCJul 19, 23:35 UTC2h 15m

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 N8812Q page for operator, model, and routing details .

Mode-S AC2439 frequently asked

What is Mode-S code AC2439?
AC2439 is an ICAO 24-bit transponder address. Allocated to United States. Assigned to N8812Q.
Where is Mode-S AC2439 registered?
Mode-S code AC2439 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 AC2439 broadcasting right now?
Yes. Mode-S AC2439 is currently airborne.
Hex, octal, and decimal Mode-S codes: what's the difference?
The same 24-bit identifier expressed in different bases: hex AC2439, octal 53022071, decimal 11,281,465.
What flights does AC2439 operate?
Mode-S AC2439 has broadcast 20 distinct callsigns, including SWA155, SWA3193, SWA745, SWA586, SWA582.