Apparatus

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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 Jul 26, 22:15 UTC
Flights observed
732
Distinct callsigns
20
Country
US
Last broadcast
Jul 26, 22:15 UTC

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
SWA4160 Southwest Airlines 7 2026-07-25
SWA550 - 5 2026-06-29
SWA9008 Southwest Airlines 4 2026-07-18
SWA3610 Southwest Airlines 4 2026-05-29
SWA3374 - 4 2026-07-15
SWA3330 Southwest Airlines 4 2026-07-24
SWA2728 Southwest Airlines 4 2026-07-22
SWA2392 - 4 2026-07-17
SWA2120 Southwest Airlines 4 2026-04-18
SWA1281 Southwest Airlines 4 2026-07-25
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

Recent flights last 50

DateFlightRouteTakeoffLandingDuration
2026-07-26 SWA3679 SJC → SEA Jul 26, 20:30 UTCJul 26, 22:15 UTC1h 45m
2026-07-26 SWA1813 STL → PHX Jul 26, 18:45 UTCJul 26, 19:30 UTC45m
2026-07-26 SWA3513 PHL → MDW Jul 26, 14:00 UTCJul 26, 17:35 UTC3h 35m
2026-07-26 SWA3332 BWI → MHT Jul 26, 04:30 UTCJul 26, 05:20 UTC50m
2026-07-26 SWA2290 PDX → SJC Jul 26, 00:40 UTCJul 26, 03:10 UTC2h 30m
2026-07-25 SWA4707 MSP → BWI Jul 25, 20:55 UTCJul 25, 23:25 UTC2h 30m
2026-07-25 SWA1281 OAK → OGG Jul 25, 17:55 UTCJul 25, 19:40 UTC1h 45m
2026-07-25 SWA1281 OAK → OGG Jul 25, 17:53 UTCJul 25, 19:30 UTC1h 37m
2026-07-25 SWA1281 OAK → OGG Jul 25, 16:25 UTCJul 25, 16:50 UTC25m
2026-07-25 SWA1281 OAK → OGG Jul 25, 12:35 UTCJul 25, 15:15 UTC2h 40m
2026-07-25 SWA3109 STL → BWI Jul 25, 10:55 UTCJul 25, 11:35 UTC40m
2026-07-25 SWA3109 STL → BWI Jul 25, 10:51 UTCJul 25, 11:31 UTC40m
2026-07-25 SWA4160 MDW → CHS Jul 25, 04:30 UTCJul 25, 06:35 UTC2h 5m
2026-07-25 SWA4160 MDW → CHS Jul 25, 02:40 UTCJul 25, 03:30 UTC50m
2026-07-24 SWA4160 MDW → CHS Jul 24, 23:40 UTCJul 25, 01:45 UTC2h 5m
2026-07-24 SWA3616 MCO → ALB Jul 24, 20:15 UTCJul 24, 22:20 UTC2h 5m
2026-07-24 SWA3330 MDW → PHL Jul 24, 15:55 UTCJul 24, 18:25 UTC2h 30m
2026-07-24 SWA3330 MDW → PHL Jul 24, 15:52 UTCJul 24, 18:19 UTC2h 28m
2026-07-24 SWA4666 LAS → SMF Jul 24, 12:30 UTCJul 24, 14:40 UTC2h 10m
2026-07-24 SWA4666 LAS → SMF Jul 24, 12:25 UTCJul 24, 14:40 UTC2h 15m
2026-07-24 SWA384 DEN → BNA Jul 24, 04:53 UTCJul 24, 06:10 UTC1h 18m
2026-07-24 SWA384 DEN → BNA Jul 24, 04:55 UTCJul 24, 06:15 UTC1h 20m
2026-07-24 SWA4186 DEN → BOS Jul 24, 02:50 UTCJul 24, 03:50 UTC1h 0m
2026-07-24 SWA4186 DEN → BOS Jul 24, 02:48 UTCJul 24, 03:44 UTC56m
2026-07-23 SWA40 HOU → DAL Jul 23, 23:20 UTCJul 24, 01:50 UTC2h 30m
2026-07-23 SWA40 HOU → DAL Jul 23, 21:10 UTCJul 23, 21:50 UTC40m
2026-07-23 SWA4254 DAL → CHS Jul 23, 17:20 UTCJul 23, 20:00 UTC2h 40m
2026-07-23 SWA4254 DAL → CHS Jul 23, 17:19 UTCJul 23, 19:58 UTC2h 39m
2026-07-23 SWA1267 BWI → PVD Jul 23, 14:50 UTCJul 23, 16:00 UTC1h 10m
2026-07-23 SWA1267 BWI → PVD Jul 23, 14:49 UTCJul 23, 15:58 UTC1h 9m
2026-07-23 SWA1267 BWI → PVD Jul 23, 13:05 UTCJul 23, 13:55 UTC50m
2026-07-23 SWA4504 ALB → BWI Jul 23, 10:35 UTCJul 23, 11:45 UTC1h 10m
2026-07-23 SWA4504 ALB → BWI Jul 23, 10:34 UTCJul 23, 11:38 UTC1h 4m
2026-07-23 SWA1659 BWI → BUF Jul 23, 04:15 UTCJul 23, 05:24 UTC1h 9m
2026-07-23 SWA1659 BWI → BUF Jul 23, 04:20 UTCJul 23, 05:25 UTC1h 5m
2026-07-22 SWA1881 MDW → BOS Jul 22, 23:55 UTCJul 23, 03:15 UTC3h 20m
2026-07-22 SWA1881 MDW → BOS Jul 22, 23:53 UTCJul 23, 03:20 UTC3h 27m
2026-07-22 SWA2489 PHX → OAK Jul 22, 19:20 UTCJul 22, 21:00 UTC1h 40m
2026-07-22 SWA2489 PHX → OAK Jul 22, 19:15 UTCJul 22, 20:49 UTC1h 34m
2026-07-22 SWA3572 TPA → BWI Jul 22, 17:10 UTCJul 22, 18:10 UTC1h 0m
2026-07-22 SWA2728 BWI → MHT Jul 22, 12:35 UTCJul 22, 16:08 UTC3h 34m
2026-07-22 SWA2728 BWI → MHT Jul 22, 12:35 UTCJul 22, 16:15 UTC3h 40m
2026-07-22 SWA2362 SEA → SJC Jul 22, 05:10 UTCJul 22, 05:25 UTC15m
2026-07-22 SWA2362 SEA → SJC Jul 22, 05:08 UTCJul 22, 06:09 UTC1h 1m
2026-07-22 SWA1291 LGB → SJC Jul 22, 00:55 UTCJul 22, 04:10 UTC3h 15m
2026-07-22 SWA1291 LGB → SJC Jul 22, 00:54 UTCJul 22, 04:04 UTC3h 10m
2026-07-21 SWA2061 BNA → DAL Jul 21, 21:55 UTCJul 21, 23:50 UTC1h 55m
2026-07-21 SWA2061 BNA → DAL Jul 21, 21:52 UTCJul 21, 23:46 UTC1h 54m
2026-07-21 SWA936 RDU → BWI Jul 21, 18:20 UTCJul 21, 20:40 UTC2h 20m
2026-07-21 SWA358 MCO → BWI Jul 21, 15:35 UTCJul 21, 17:10 UTC1h 35m

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 Jul 26, 22:15 UTC.
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 SWA4160, SWA550, SWA9008, SWA3610, SWA3374.