Apparatus

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sensors Mode-S transponder

ABEF16

ICAO 24-bit transponder address · allocated to United States

Currently assigned to N8681M · BOEING 737-800 · operated by SOUTHWEST AIRLINES CO

Hex
ABEF16
Octal
52767426
Decimal
11,267,862
Country
US
Tail
N8681M
Type
B738
No current signal · last broadcast 2h ago
Flights observed
665
Distinct callsigns
20
Country
US
Last broadcast
2h ago

Last known position

Most recent position reported by Mode-S ABEF16.

Country allocation

The ICAO 24-bit address ABEF16 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
SWA963 - 5 2026-07-07
SWA2786 - 5 2026-06-30
SWA2606 Southwest Airlines 5 2026-04-21
SWA958 - 4 2026-06-30
SWA931 Southwest Airlines 4 2026-06-07
SWA438 Southwest Airlines 4 2026-05-25
SWA3201 Southwest Airlines 4 2026-05-05
SWA2489 Southwest Airlines 4 2026-05-25
SWA2224 Southwest Airlines 4 2026-04-23
SWA1938 Southwest Airlines 4 2026-04-16
SWA1893 - 4 2026-07-10
SWA1882 - 4 2026-06-11
SWA133 Southwest Airlines 4 2026-04-18
SWA1123 - 4 2026-06-27
SWA1010 - 4 2026-06-16
SWA462 - 3 2026-06-24
SWA45 - 3 2026-07-03
SWA4403 - 3 2026-07-10
SWA4359 Southwest Airlines 3 2026-05-25
SWA4313 Southwest Airlines 3 2026-05-17

Recent flights last 50

DateFlightRouteTakeoffLandingDuration
2026-07-14 SWA1034 - Jul 14, 00:45 UTCJul 14, 01:35 UTC50m
2026-07-13 SWA191 ATL → CMH Jul 13, 22:50 UTCJul 14, 00:00 UTC1h 10m
2026-07-13 SWA346 - Jul 13, 19:45 UTCJul 13, 21:10 UTC1h 25m
2026-07-13 SWA4427 - Jul 13, 16:30 UTCJul 13, 17:20 UTC50m
2026-07-13 SWA1519 - Jul 13, 13:45 UTCJul 13, 15:10 UTC1h 25m
2026-07-13 SWA1519 DAL → BNA Jul 13, 13:41 UTCJul 13, 15:01 UTC1h 20m
2026-07-12 SWA1286 - Jul 12, 22:55 UTCJul 13, 01:15 UTC2h 20m
2026-07-12 SWA347 - Jul 12, 19:35 UTCJul 12, 21:50 UTC2h 15m
2026-07-12 SWA2528 - Jul 12, 14:10 UTCJul 12, 15:35 UTC1h 25m
2026-07-12 SWA576 - Jul 12, 10:40 UTCJul 12, 13:05 UTC2h 25m
2026-07-12 SWA3256 DAL → LGA Jul 12, 00:25 UTCJul 12, 03:25 UTC3h 0m
2026-07-12 SWA3256 DAL → LGA Jul 12, 00:23 UTCJul 12, 03:22 UTC2h 59m
2026-07-11 SWA3256 PHX → DAL Jul 11, 21:10 UTCJul 11, 23:15 UTC2h 5m
2026-07-11 SWA3794 - Jul 11, 18:05 UTCJul 11, 19:50 UTC1h 45m
2026-07-11 SWA3794 SAT → PHX Jul 11, 18:04 UTCJul 11, 19:51 UTC1h 47m
2026-07-11 SWA991 - Jul 11, 15:10 UTCJul 11, 17:00 UTC1h 50m
2026-07-11 SWA4256 - Jul 11, 12:15 UTCJul 11, 13:35 UTC1h 20m
2026-07-11 SWA4878 PHX → COS Jul 11, 05:50 UTCJul 11, 07:15 UTC1h 25m
2026-07-11 SWA4878 PHX → COS Jul 11, 05:50 UTCJul 11, 07:11 UTC1h 21m
2026-07-11 SWA4258 DAL → PHX Jul 11, 00:45 UTCJul 11, 02:40 UTC1h 55m
2026-07-10 SWA2219 LAS → DAL Jul 10, 21:00 UTCJul 10, 23:15 UTC2h 15m
2026-07-10 SWA4403 - Jul 10, 16:50 UTCJul 10, 19:30 UTC2h 40m
2026-07-10 SWA4403 - Jul 10, 14:55 UTCJul 10, 15:35 UTC40m
2026-07-10 SWA4403 - Jul 10, 11:15 UTCJul 10, 13:55 UTC2h 40m
2026-07-10 SWA1499 DEN → BWI Jul 10, 04:15 UTCJul 10, 07:25 UTC3h 10m
2026-07-10 SWA1893 - Jul 10, 00:50 UTCJul 10, 02:50 UTC2h 0m
2026-07-10 SWA1893 ICT → DEN Jul 10, 00:46 UTCJul 10, 02:44 UTC1h 58m
2026-07-09 SWA1893 - Jul 9, 20:00 UTCJul 9, 23:10 UTC3h 10m
2026-07-09 SWA1893 - Jul 9, 18:30 UTCJul 9, 18:55 UTC25m
2026-07-09 SWA4573 LGA → MDW Jul 9, 15:25 UTCJul 9, 17:15 UTC1h 50m
2026-07-09 SWA2013 - Jul 9, 11:00 UTCJul 9, 14:00 UTC3h 0m
2026-07-09 SWA4474 - Jul 9, 03:35 UTCJul 9, 05:00 UTC1h 25m
2026-07-09 SWA1142 - Jul 9, 01:00 UTCJul 9, 02:10 UTC1h 10m
2026-07-08 SWA1142 - Jul 8, 20:25 UTCJul 8, 23:10 UTC2h 45m
2026-07-08 SWA3263 - Jul 8, 18:00 UTCJul 8, 19:20 UTC1h 20m
2026-07-08 SWA3263 - Jul 8, 16:05 UTCJul 8, 16:55 UTC50m
2026-07-08 SWA3489 SJC → SAN Jul 8, 13:33 UTCJul 8, 14:39 UTC1h 7m
2026-07-08 SWA3489 - Jul 8, 13:35 UTCJul 8, 14:40 UTC1h 5m
2026-07-08 SWA1232 - Jul 8, 02:25 UTCJul 8, 05:30 UTC3h 5m
2026-07-08 SWA1232 AUS → SJC Jul 8, 02:23 UTCJul 8, 05:30 UTC3h 7m
2026-07-07 SWA2184 LAS → AUS Jul 7, 22:40 UTCJul 8, 00:55 UTC2h 15m
2026-07-07 SWA1136 LAS → LAS Jul 7, 16:55 UTCJul 7, 21:20 UTC4h 25m
2026-07-07 SWA1629 SEA → LAS Jul 7, 13:50 UTCJul 7, 15:45 UTC1h 55m
2026-07-07 SWA963 LAS → SEA Jul 7, 06:20 UTCJul 7, 08:15 UTC1h 55m
2026-07-07 SWA1128 DAL → LAS Jul 7, 02:10 UTCJul 7, 04:35 UTC2h 25m
2026-07-07 SWA1128 DAL → LAS Jul 7, 02:05 UTCJul 7, 04:29 UTC2h 24m
2026-07-06 SWA1219 - Jul 6, 23:25 UTCJul 7, 00:50 UTC1h 25m
2026-07-06 SWA4385 - Jul 6, 20:20 UTCJul 6, 22:10 UTC1h 50m
2026-07-06 SWA4414 - Jul 6, 18:00 UTCJul 6, 19:05 UTC1h 5m
2026-07-06 SWA4128 PHX → SFO Jul 6, 15:55 UTCJul 6, 16:35 UTC40m

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 N8681M page for operator, model, and routing details .

Mode-S ABEF16 frequently asked

What is Mode-S code ABEF16?
ABEF16 is an ICAO 24-bit transponder address. Allocated to United States. Assigned to N8681M.
Where is Mode-S ABEF16 registered?
Mode-S code ABEF16 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 ABEF16 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 ABEF16, octal 52767426, decimal 11,267,862.
What flights does ABEF16 operate?
Mode-S ABEF16 has broadcast 20 distinct callsigns, including SWA963, SWA2786, SWA2606, SWA958, SWA931.