Apparatus

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sensors Mode-S transponder

ABFD39

ICAO 24-bit transponder address · allocated to United States

Currently assigned to N8716B · BOEING 737 MAX 8 · operated by SOUTHWEST AIRLINES CO

Hex
ABFD39
Octal
52776471
Decimal
11,271,481
Country
US
Tail
N8716B
Type
B38M
No current signal · last broadcast 2h ago
Flights observed
401
Distinct callsigns
20
Country
US
Last broadcast
2h ago

Last known position

Most recent position reported by Mode-S ABFD39.

Country allocation

The ICAO 24-bit address ABFD39 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
SWA2209 Southwest Airlines 5 2026-05-22
SWA2766 Southwest Airlines 4 2026-05-11
SWA2290 Southwest Airlines 4 2026-05-15
SWA1492 Southwest Airlines 4 2026-05-25
SWA753 - 3 2026-04-13
SWA694 Southwest Airlines 3 2026-04-21
SWA46 Southwest Airlines 3 2026-05-30
SWA4478 - 3 2026-04-16
SWA4064 Southwest Airlines 3 2026-04-19
SWA4020 Southwest Airlines 3 2026-04-28
SWA3705 - 3 2026-04-14
SWA3604 Southwest Airlines 3 2026-04-15
SWA3286 Southwest Airlines 3 2026-05-30
SWA3151 Southwest Airlines 3 2026-06-04
SWA29 Southwest Airlines 3 2026-05-28
SWA2721 Southwest Airlines 3 2026-04-27
SWA2257 Southwest Airlines 3 2026-05-09
SWA2178 Southwest Airlines 3 2026-05-25
SWA1949 Southwest Airlines 3 2026-04-26
SWA1881 Southwest Airlines 3 2026-05-24

Recent flights last 50

DateFlightRouteTakeoffLandingDuration
2026-06-12 SWA1916 MDW → MSY Jun 12, 23:05 UTCJun 12, 23:25 UTC20m
2026-06-12 SWA1865 AUS → MIA Jun 12, 16:05 UTCJun 12, 21:30 UTC5h 25m
2026-06-12 SWA4342 HOU → LAX Jun 12, 13:20 UTCJun 12, 14:01 UTC40m
2026-06-12 SWA3936 PHL → MDW Jun 12, 04:05 UTCJun 12, 07:10 UTC3h 5m
2026-06-12 SWA3936 PHL → MDW Jun 12, 04:02 UTCJun 12, 07:12 UTC3h 10m
2026-06-12 SWA3387 SJC → HNL Jun 12, 01:00 UTCJun 12, 02:25 UTC1h 25m
2026-06-11 SWA2067 STL → CHS Jun 11, 21:30 UTCJun 11, 23:55 UTC2h 25m
2026-06-11 SWA3067 AMA → AUS Jun 11, 18:12 UTCJun 11, 20:19 UTC2h 7m
2026-06-11 SWA3067 AMA → AUS Jun 11, 18:15 UTCJun 11, 20:20 UTC2h 5m
2026-06-11 SWA431 BUR → SJC Jun 11, 14:45 UTCJun 11, 16:15 UTC1h 30m
2026-06-11 SWA2546 DEN → OAK Jun 11, 12:05 UTCJun 11, 13:30 UTC1h 25m
2026-06-11 SWA2546 DEN → OAK Jun 11, 12:01 UTCJun 11, 13:21 UTC1h 20m
2026-06-11 SWA559 SAN → SJC Jun 11, 00:45 UTCJun 11, 03:00 UTC2h 15m
2026-06-10 SWA1416 CVG → BWI Jun 10, 21:45 UTCJun 10, 23:40 UTC1h 55m
2026-06-10 SWA2218 BUR → SJC Jun 10, 18:05 UTCJun 10, 20:15 UTC2h 10m
2026-06-10 SWA2374 OAK → PSP Jun 10, 15:40 UTCJun 10, 16:50 UTC1h 10m
2026-06-10 SWA3046 LAS → ORD Jun 10, 13:15 UTCJun 10, 14:10 UTC55m
2026-06-09 SWA3342 ATL → PHL Jun 9, 22:45 UTCJun 10, 03:50 UTC5h 5m
2026-06-09 SWA2238 PDX → PHX Jun 9, 15:30 UTCJun 9, 21:15 UTC5h 45m
2026-06-09 SWA1915 BUR → DAL Jun 9, 11:25 UTCJun 9, 12:25 UTC1h 0m
2026-06-09 SWA1915 BUR → DAL Jun 9, 07:05 UTCJun 9, 07:25 UTC20m
2026-06-08 SWA3274 BNA → FLL Jun 8, 16:45 UTCJun 8, 18:00 UTC1h 15m
2026-06-08 SWA3274 BNA → FLL Jun 8, 16:43 UTCJun 8, 22:41 UTC5h 58m
2026-06-08 SWA3066 OAK → SAN Jun 8, 12:25 UTCJun 8, 13:55 UTC1h 30m
2026-06-08 SWA1454 LAS → BLI Jun 8, 08:20 UTCJun 8, 09:50 UTC1h 30m
2026-06-08 SWA1525 ELP → AUS Jun 8, 06:25 UTCJun 8, 07:25 UTC1h 0m
2026-06-08 SWA2217 SJC → LAX Jun 8, 02:40 UTCJun 8, 04:45 UTC2h 5m
2026-06-07 SWA3641 SJC → LAX Jun 7, 23:00 UTCJun 8, 01:00 UTC2h 0m
2026-06-07 SWA3641 SJC → LAX Jun 7, 22:59 UTCJun 8, 00:54 UTC1h 56m
2026-06-07 SWA103 PHL → MDW Jun 7, 20:20 UTCJun 7, 21:25 UTC1h 5m
2026-06-07 SWA5077 BWI → BOS Jun 7, 17:35 UTCJun 7, 19:10 UTC1h 35m
2026-06-07 SWA5077 BWI → BOS Jun 7, 17:30 UTCJun 7, 18:58 UTC1h 28m
2026-06-07 SWA5076 BNA → LAS Jun 7, 14:45 UTCJun 7, 16:10 UTC1h 25m
2026-06-06 SWA1914 ONT → OAK Jun 6, 22:15 UTCJun 7, 03:30 UTC5h 15m
2026-06-06 SWA3093 BDL → BWI Jun 6, 20:05 UTCJun 6, 20:25 UTC20m
2026-06-06 SWA574 MCI → LAX Jun 6, 18:14 UTCJun 6, 18:35 UTC20m
2026-06-06 SWA2508 DEN → LBB Jun 6, 16:30 UTCJun 6, 16:39 UTC10m
2026-06-06 SWA2508 DEN → LBB Jun 6, 16:18 UTCJun 6, 16:39 UTC21m
2026-06-06 SWA1925 BDL → BWI Jun 6, 07:45 UTCJun 6, 07:55 UTC10m
2026-06-06 SWA2152 SJC → LGB Jun 6, 05:45 UTCJun 6, 06:10 UTC25m
2026-06-06 SWA2152 SJC → LGB Jun 6, 05:31 UTCJun 6, 06:07 UTC36m
2026-06-06 SWA1906 LAX → SFO Jun 6, 03:40 UTCJun 6, 04:00 UTC20m
2026-06-06 SWA1906 LAX → SFO Jun 6, 03:37 UTCJun 6, 04:14 UTC37m
2026-06-06 SWA661 OAK → PDX Jun 6, 02:20 UTCJun 6, 02:30 UTC10m
2026-06-06 SWA1923 MDW → IAH Jun 6, 00:00 UTCJun 6, 00:10 UTC10m
2026-06-05 SWA1923 MDW → IAH Jun 5, 23:58 UTCJun 6, 00:21 UTC23m
2026-06-05 SWA2734 FLL → MSY Jun 5, 22:05 UTCJun 5, 22:15 UTC10m
2026-06-05 SWA2734 FLL → MSY Jun 5, 21:53 UTCJun 5, 22:14 UTC21m
2026-06-05 SWA1921 SAN → LAS Jun 5, 19:55 UTCJun 5, 20:05 UTC10m
2026-06-05 SWA2167 MDW → PHL Jun 5, 18:14 UTCJun 5, 18:44 UTC30m

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 N8716B page for operator, model, and routing details .

Mode-S ABFD39 frequently asked

What is Mode-S code ABFD39?
ABFD39 is an ICAO 24-bit transponder address. Allocated to United States. Assigned to N8716B.
Where is Mode-S ABFD39 registered?
Mode-S code ABFD39 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 ABFD39 broadcasting right now?
No active broadcast right now. Last signal was 2h ago.
Hex, octal, and decimal Mode-S codes: what's the difference?
The same 24-bit identifier expressed in different bases: hex ABFD39, octal 52776471, decimal 11,271,481.
What flights does ABFD39 operate?
Mode-S ABFD39 has broadcast 20 distinct callsigns, including SWA2209, SWA2766, SWA2290, SWA1492, SWA753.