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sensors Mode-S transponder

ABFD66

ICAO 24-bit transponder address · allocated to United States

Currently assigned to N8717M · BOEING 737 MAX 8 · operated by SOUTHWEST AIRLINES CO

Hex
ABFD66
Octal
52776546
Decimal
11,271,526
Country
US
Tail
N8717M
Type
B38M
No current signal · last broadcast Jul 26, 19:45 UTC
Flights observed
704
Distinct callsigns
20
Country
US
Last broadcast
Jul 26, 19:45 UTC

Last known position

Most recent position reported by Mode-S ABFD66.

Country allocation

The ICAO 24-bit address ABFD66 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
SWA3596 Southwest Airlines 5 2026-05-04
SWA1087 Southwest Airlines 5 2026-04-22
SWA1048 Southwest Airlines 5 2026-06-12
SWA900 Southwest Airlines 4 2026-07-20
SWA657 - 4 2026-04-13
SWA489 Southwest Airlines 4 2026-05-04
SWA3004 - 4 2026-07-21
SWA2332 Southwest Airlines 4 2026-04-28
SWA2272 Southwest Airlines 4 2026-05-04
SWA2247 Southwest Airlines 4 2026-05-16
SWA1743 - 4 2026-07-05
SWA1478 Southwest Airlines 4 2026-05-15
SWA843 Southwest Airlines 3 2026-06-29
SWA664 Southwest Airlines 3 2026-07-25
SWA544 Southwest Airlines 3 2026-04-18
SWA532 Southwest Airlines 3 2026-05-16
SWA512 - 3 2026-06-16
SWA495 Southwest Airlines 3 2026-07-25
SWA471 - 3 2026-06-29
SWA4583 - 3 2026-04-13

Recent flights last 50

DateFlightRouteTakeoffLandingDuration
2026-07-26 SWA1443 BNA → LGA Jul 26, 19:00 UTCJul 26, 19:45 UTC45m
2026-07-26 SWA568 BWI → BOS Jul 26, 15:15 UTCJul 26, 16:40 UTC1h 25m
2026-07-26 SWA568 BWI → BOS Jul 26, 15:12 UTCJul 26, 16:38 UTC1h 26m
2026-07-26 SWA3480 BWI → CMH Jul 26, 05:50 UTCJul 26, 09:33 UTC3h 43m
2026-07-26 SWA3480 BWI → CMH Jul 26, 05:55 UTCJul 26, 09:30 UTC3h 36m
2026-07-26 SWA4293 OAK → LAX Jul 26, 02:15 UTCJul 26, 03:28 UTC1h 13m
2026-07-26 SWA4293 OAK → LAX Jul 26, 02:15 UTCJul 26, 03:30 UTC1h 15m
2026-07-25 SWA2316 BWI → CVG Jul 25, 23:35 UTCJul 26, 00:35 UTC1h 0m
2026-07-25 SWA2316 BWI → CVG Jul 25, 20:05 UTCJul 25, 20:20 UTC15m
2026-07-25 SWA495 HOU → MAF Jul 25, 06:45 UTCJul 25, 07:13 UTC28m
2026-07-25 SWA664 PHX → LAS Jul 25, 05:18 UTCJul 25, 05:39 UTC21m
2026-07-25 SWA2349 SAN → AUS Jul 25, 03:30 UTCJul 25, 03:40 UTC10m
2026-07-25 SWA3096 SMF → ONT Jul 25, 02:00 UTCJul 25, 02:15 UTC15m
2026-07-25 SWA3096 SMF → ONT Jul 25, 01:53 UTCJul 25, 02:17 UTC24m
2026-07-25 SWA2172 ABQ → PHX Jul 25, 00:00 UTCJul 25, 00:15 UTC15m
2026-07-24 SWA3783 IND → TPA Jul 24, 22:20 UTCJul 24, 22:25 UTC5m
2026-07-24 SWA3783 IND → TPA Jul 24, 17:20 UTCJul 24, 18:10 UTC50m
2026-07-24 SWA2359 BLI → OAK Jul 24, 14:45 UTCJul 24, 15:45 UTC1h 0m
2026-07-24 SWA139 LAS → OAK Jul 24, 10:30 UTCJul 24, 11:50 UTC1h 20m
2026-07-24 SWA2515 LAS → OAK Jul 24, 00:10 UTCJul 24, 00:30 UTC20m
2026-07-23 SWA2515 LAS → OAK Jul 23, 23:54 UTCJul 24, 00:29 UTC35m
2026-07-23 SWA2262 BDL → BWI Jul 23, 16:43 UTCJul 23, 22:45 UTC6h 2m
2026-07-23 SWA2262 BDL → BWI Jul 23, 16:45 UTCJul 23, 22:35 UTC5h 50m
2026-07-23 SWA2964 MDW → BOS Jul 23, 12:40 UTCJul 23, 14:55 UTC2h 15m
2026-07-23 SWA1081 MSY → DAL Jul 23, 02:35 UTCJul 23, 03:35 UTC1h 0m
2026-07-23 SWA1081 MSY → DAL Jul 23, 02:31 UTCJul 23, 03:29 UTC58m
2026-07-23 SWA2053 EFD → MSY Jul 23, 00:55 UTCJul 23, 01:45 UTC50m
2026-07-22 SWA817 LIR → HOU Jul 22, 20:15 UTCJul 22, 23:30 UTC3h 15m
2026-07-22 SWA691 - Jul 22, 16:05 UTCJul 22, 18:15 UTC2h 10m
2026-07-22 SWA4021 BWI → BOS Jul 22, 12:15 UTCJul 22, 14:10 UTC1h 55m
2026-07-22 SWA4021 BWI → BOS Jul 22, 12:11 UTCJul 22, 14:12 UTC2h 1m
2026-07-22 SWA2394 - Jul 22, 03:50 UTCJul 22, 05:25 UTC1h 35m
2026-07-21 SWA3004 - Jul 21, 23:10 UTCJul 22, 02:30 UTC3h 20m
2026-07-21 SWA3004 MCO → MSY Jul 21, 20:15 UTCJul 21, 21:30 UTC1h 15m
2026-07-21 SWA1817 PHL → MDW Jul 21, 15:00 UTCJul 21, 18:55 UTC3h 55m
2026-07-21 SWA1817 PHL → MDW Jul 21, 14:58 UTCJul 21, 18:49 UTC3h 51m
2026-07-21 SWA3450 - Jul 21, 12:10 UTCJul 21, 13:35 UTC1h 25m
2026-07-21 SWA9004 BHM → DAL Jul 21, 06:15 UTCJul 21, 07:15 UTC1h 0m
2026-07-21 SWA2072 ORD → DEN Jul 21, 02:30 UTCJul 21, 05:05 UTC2h 35m
2026-07-20 SWA5065 - Jul 20, 23:00 UTCJul 21, 00:35 UTC1h 35m
2026-07-20 SWA5065 STL → HOU Jul 20, 22:57 UTCJul 21, 00:34 UTC1h 37m
2026-07-20 SWA5064 - Jul 20, 20:20 UTCJul 20, 22:00 UTC1h 40m
2026-07-20 SWA5055 MDW → MCO Jul 20, 17:15 UTCJul 20, 18:55 UTC1h 40m
2026-07-20 SWA5068 CMH → ATL Jul 20, 14:25 UTCJul 20, 16:00 UTC1h 35m
2026-07-20 SWA1730 ORD → DAL Jul 20, 11:25 UTCJul 20, 13:25 UTC2h 0m
2026-07-20 SWA900 BWI → MHT Jul 20, 03:55 UTCJul 20, 05:55 UTC2h 0m
2026-07-19 SWA715 - Jul 19, 21:45 UTCJul 19, 22:05 UTC20m
2026-07-19 SWA715 DAL → LGA Jul 19, 21:32 UTCJul 20, 02:17 UTC4h 45m
2026-07-19 SWA4083 - Jul 19, 14:35 UTCJul 19, 19:45 UTC5h 10m
2026-07-19 SWA1916 - Jul 19, 03:20 UTCJul 19, 03:55 UTC35m

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 N8717M page for operator, model, and routing details .

Mode-S ABFD66 frequently asked

What is Mode-S code ABFD66?
ABFD66 is an ICAO 24-bit transponder address. Allocated to United States. Assigned to N8717M.
Where is Mode-S ABFD66 registered?
Mode-S code ABFD66 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 ABFD66 broadcasting right now?
No active broadcast right now. Last signal was Jul 26, 19:45 UTC.
Hex, octal, and decimal Mode-S codes: what's the difference?
The same 24-bit identifier expressed in different bases: hex ABFD66, octal 52776546, decimal 11,271,526.
What flights does ABFD66 operate?
Mode-S ABFD66 has broadcast 20 distinct callsigns, including SWA3596, SWA1087, SWA1048, SWA900, SWA657.