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sensors Mode-S transponder

ABF351

ICAO 24-bit transponder address · allocated to United States

Currently assigned to N8695D · BOEING 737-800 · operated by SOUTHWEST AIRLINES CO

Hex
ABF351
Octal
52771521
Decimal
11,268,945
Country
US
Tail
N8695D
Type
B738
No current signal · last broadcast 1h ago
Flights observed
634
Distinct callsigns
20
Country
US
Last broadcast
1h ago

Last known position

Most recent position reported by Mode-S ABF351.

Country allocation

The ICAO 24-bit address ABF351 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
SWA550 - 5 2026-06-29
SWA4160 - 4 2026-07-03
SWA3610 Southwest Airlines 4 2026-05-29
SWA2120 Southwest Airlines 4 2026-04-18
SWA894 Southwest Airlines 3 2026-05-07
SWA882 Southwest Airlines 3 2026-06-09
SWA712 Southwest Airlines 3 2026-05-06
SWA609 Southwest Airlines 3 2026-04-20
SWA55 Southwest Airlines 3 2026-05-26
SWA4242 - 3 2026-06-25
SWA4194 Southwest Airlines 3 2026-05-01
SWA416 Southwest Airlines 3 2026-05-23
SWA3966 Southwest Airlines 3 2026-04-25
SWA3835 Southwest Airlines 3 2026-05-24
SWA3807 Southwest Airlines 3 2026-05-08
SWA366 Southwest Airlines 3 2026-05-26
SWA3374 Southwest Airlines 3 2026-05-21
SWA3267 - 3 2026-06-20
SWA3168 - 3 2026-06-27
SWA3038 - 3 2026-07-08

Recent flights last 50

DateFlightRouteTakeoffLandingDuration
2026-07-14 SWA4438 - Jul 14, 01:30 UTCJul 14, 02:15 UTC45m
2026-07-13 SWA3561 - Jul 13, 21:15 UTCJul 14, 00:35 UTC3h 20m
2026-07-13 SWA4045 - Jul 13, 17:55 UTCJul 13, 20:20 UTC2h 25m
2026-07-13 SWA650 - Jul 13, 14:55 UTCJul 13, 16:40 UTC1h 45m
2026-07-13 SWA872 MCO → SDF Jul 13, 12:10 UTCJul 13, 13:45 UTC1h 35m
2026-07-13 SWA4872 RSW → MCO Jul 13, 10:20 UTCJul 13, 10:50 UTC30m
2026-07-13 SWA2653 BWI → RSW Jul 13, 01:55 UTCJul 13, 04:15 UTC2h 20m
2026-07-13 SWA2653 BWI → RSW Jul 13, 01:53 UTCJul 13, 04:14 UTC2h 21m
2026-07-12 SWA2653 - Jul 12, 23:05 UTCJul 13, 00:40 UTC1h 35m
2026-07-12 SWA1111 - Jul 12, 19:55 UTCJul 12, 21:40 UTC1h 45m
2026-07-12 SWA3789 MSY → BWI Jul 12, 16:05 UTCJul 12, 18:15 UTC2h 10m
2026-07-12 SWA3312 - Jul 12, 13:55 UTCJul 12, 15:01 UTC1h 5m
2026-07-12 SWA3312 DCA → DAL Jul 12, 10:30 UTCJul 12, 13:05 UTC2h 35m
2026-07-11 SWA4380 - Jul 11, 23:45 UTCJul 12, 01:15 UTC1h 30m
2026-07-11 SWA448 - Jul 11, 20:55 UTCJul 11, 22:30 UTC1h 35m
2026-07-11 SWA448 - Jul 11, 17:20 UTCJul 11, 19:35 UTC2h 15m
2026-07-11 SWA4173 TPA → LAS Jul 11, 12:10 UTCJul 11, 16:10 UTC4h 0m
2026-07-10 SWA4739 DEN → TPA Jul 10, 23:05 UTCJul 11, 02:15 UTC3h 10m
2026-07-10 SWA3146 - Jul 10, 20:00 UTCJul 10, 21:40 UTC1h 40m
2026-07-10 SWA3146 ONT → DEN Jul 10, 19:57 UTCJul 10, 21:39 UTC1h 42m
2026-07-10 SWA4080 - Jul 10, 17:10 UTCJul 10, 18:15 UTC1h 5m
2026-07-10 SWA4080 DEN → ONT Jul 10, 17:06 UTCJul 10, 18:55 UTC1h 49m
2026-07-10 SWA3112 - Jul 10, 14:35 UTCJul 10, 15:50 UTC1h 15m
2026-07-10 SWA3112 OKC → DEN Jul 10, 14:33 UTCJul 10, 15:45 UTC1h 12m
2026-07-10 SWA4490 - Jul 10, 12:40 UTCJul 10, 13:40 UTC1h 0m
2026-07-10 SWA4490 HOU → OKC Jul 10, 12:37 UTCJul 10, 13:37 UTC1h 0m
2026-07-10 SWA4023 - Jul 10, 09:40 UTCJul 10, 11:25 UTC1h 45m
2026-07-10 SWA4023 TPA → HOU Jul 10, 09:37 UTCJul 10, 11:25 UTC1h 48m
2026-07-10 SWA2232 DEN → TPA Jul 10, 02:55 UTCJul 10, 06:10 UTC3h 15m
2026-07-09 SWA2887 - Jul 9, 22:05 UTCJul 10, 01:45 UTC3h 40m
2026-07-09 SWA1506 - Jul 9, 18:35 UTCJul 9, 20:55 UTC2h 20m
2026-07-09 SWA3261 - Jul 9, 16:10 UTCJul 9, 17:30 UTC1h 20m
2026-07-09 SWA4835 - Jul 9, 12:30 UTCJul 9, 14:50 UTC2h 20m
2026-07-09 SWA3311 - Jul 9, 05:55 UTCJul 9, 08:15 UTC2h 20m
2026-07-09 SWA3311 PHX → OMA Jul 9, 05:55 UTCJul 9, 08:13 UTC2h 18m
2026-07-09 SWA2624 DEN → PHX Jul 9, 03:40 UTCJul 9, 05:05 UTC1h 25m
2026-07-08 SWA2549 - Jul 8, 23:45 UTCJul 9, 01:10 UTC1h 25m
2026-07-08 SWA3038 - Jul 8, 18:10 UTCJul 8, 20:10 UTC2h 0m
2026-07-08 SWA3038 BWI → MCI Jul 8, 18:07 UTCJul 8, 20:11 UTC2h 4m
2026-07-08 SWA3038 - Jul 8, 15:40 UTCJul 8, 16:45 UTC1h 5m
2026-07-08 SWA4611 - Jul 8, 12:45 UTCJul 8, 14:35 UTC1h 50m
2026-07-08 SWA3178 - Jul 8, 11:30 UTCJul 8, 11:55 UTC25m
2026-07-08 SWA3178 MKE → MDW Jul 8, 11:29 UTCJul 8, 11:51 UTC23m
2026-07-08 SWA4727 MCO → MKE Jul 8, 00:10 UTCJul 8, 02:20 UTC2h 10m
2026-07-07 SWA367 IND → MCO Jul 7, 20:35 UTCJul 7, 22:55 UTC2h 20m
2026-07-07 SWA4706 - Jul 7, 16:35 UTCJul 7, 19:45 UTC3h 10m
2026-07-07 SWA2125 - Jul 7, 11:30 UTCJul 7, 14:45 UTC3h 15m
2026-07-07 SWA4591 MCO → IND Jul 7, 01:45 UTCJul 7, 03:35 UTC1h 50m
2026-07-06 SWA2919 - Jul 6, 17:40 UTCJul 6, 20:15 UTC2h 35m
2026-07-06 SWA2919 MHT → MCO Jul 6, 17:36 UTCJul 6, 20:14 UTC2h 39m

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 N8695D page for operator, model, and routing details .

Mode-S ABF351 frequently asked

What is Mode-S code ABF351?
ABF351 is an ICAO 24-bit transponder address. Allocated to United States. Assigned to N8695D.
Where is Mode-S ABF351 registered?
Mode-S code ABF351 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 ABF351 broadcasting right now?
No active broadcast right now. Last signal was 1h ago.
Hex, octal, and decimal Mode-S codes: what's the difference?
The same 24-bit identifier expressed in different bases: hex ABF351, octal 52771521, decimal 11,268,945.
What flights does ABF351 operate?
Mode-S ABF351 has broadcast 20 distinct callsigns, including SWA550, SWA4160, SWA3610, SWA2120, SWA894.