Apparatus

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sensors Mode-S transponder

ABF9B1

ICAO 24-bit transponder address · allocated to United States

Currently assigned to N8707P · BOEING 737 MAX 8 · operated by SOUTHWEST AIRLINES CO

Hex
ABF9B1
Octal
52774661
Decimal
11,270,577
Country
US
Tail
N8707P
Type
B38M
No current signal · last broadcast 25d ago
Flights observed
445
Distinct callsigns
20
Country
US
Last broadcast
25d ago

Last known position

Most recent position reported by Mode-S ABF9B1.

Country allocation

The ICAO 24-bit address ABF9B1 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
SWA660 Southwest Airlines 5 2026-04-17
SWA2888 Southwest Airlines 5 2026-05-11
SWA1851 Southwest Airlines 5 2026-05-12
SWA750 Southwest Airlines 4 2026-06-08
SWA502 Southwest Airlines 4 2026-06-16
SWA3799 Southwest Airlines 4 2026-05-05
SWA2849 Southwest Airlines 4 2026-04-30
SWA2261 Southwest Airlines 4 2026-04-20
SWA2035 Southwest Airlines 4 2026-04-17
SWA960 Southwest Airlines 3 2026-04-16
SWA4335 Southwest Airlines 3 2026-05-03
SWA3895 Southwest Airlines 3 2026-06-01
SWA3877 Southwest Airlines 3 2026-05-09
SWA3648 Southwest Airlines 3 2026-04-16
SWA3567 Southwest Airlines 3 2026-04-21
SWA3263 - 3 2026-04-14
SWA2972 Southwest Airlines 3 2026-05-27
SWA2946 Southwest Airlines 3 2026-05-16
SWA2792 Southwest Airlines 3 2026-04-26
SWA2751 Southwest Airlines 3 2026-05-08

Recent flights last 50

DateFlightRouteTakeoffLandingDuration
2026-06-18 SWA8535 HOU → SAL Jun 18, 15:15 UTCJun 18, 15:35 UTC20m
2026-06-18 SWA8535 HOU → SAL Jun 18, 15:10 UTCJun 18, 17:33 UTC2h 23m
2026-06-17 SWA3531 - Jun 17, 21:30 UTCJun 17, 23:35 UTC2h 5m
2026-06-17 SWA426 PDX → PHX Jun 17, 18:05 UTCJun 17, 20:20 UTC2h 15m
2026-06-17 SWA1377 ORD → PHX Jun 17, 13:25 UTCJun 17, 16:55 UTC3h 30m
2026-06-17 SWA2661 SNA → AUS Jun 17, 10:25 UTCJun 17, 12:15 UTC1h 50m
2026-06-17 SWA2661 SNA → AUS Jun 17, 10:25 UTCJun 17, 12:11 UTC1h 46m
2026-06-17 SWA1192 - Jun 17, 04:30 UTCJun 17, 05:15 UTC45m
2026-06-17 SWA1192 MCO → CVG Jun 17, 01:40 UTCJun 17, 03:30 UTC1h 50m
2026-06-16 SWA502 BOS → BWI Jun 16, 21:40 UTCJun 16, 22:50 UTC1h 10m
2026-06-16 SWA502 BOS → BWI Jun 16, 21:36 UTCJun 16, 22:54 UTC1h 19m
2026-06-16 SWA502 BOS → BWI Jun 16, 18:29 UTCJun 16, 20:35 UTC2h 6m
2026-06-16 SWA502 BOS → BWI Jun 16, 03:00 UTCJun 16, 20:35 UTC17h 36m
2026-06-16 SWA112 - Jun 16, 01:50 UTCJun 16, 02:00 UTC10m
2026-06-16 SWA112 HOU → SJO Jun 16, 01:44 UTCJun 16, 04:45 UTC3h 1m
2026-06-15 SWA1013 BZE → HOU Jun 15, 22:30 UTCJun 16, 00:00 UTC1h 30m
2026-06-15 SWA837 HOU → BZE Jun 15, 18:50 UTCJun 15, 19:05 UTC15m
2026-06-15 SWA837 HOU → BZE Jun 15, 18:48 UTCJun 15, 20:47 UTC1h 59m
2026-06-15 SWA3174 SNA → OAK Jun 15, 14:05 UTCJun 15, 15:59 UTC1h 55m
2026-06-15 SWA984 - Jun 15, 11:00 UTCJun 15, 12:45 UTC1h 45m
2026-06-14 SWA607 DAL → TPA Jun 14, 20:10 UTCJun 14, 22:45 UTC2h 35m
2026-06-14 SWA181 OAK → PSP Jun 14, 14:20 UTCJun 14, 15:00 UTC40m
2026-06-13 SWA2566 BNA → LGA Jun 13, 20:10 UTCJun 13, 22:35 UTC2h 25m
2026-06-13 SWA145 MDW → PHX Jun 13, 10:50 UTCJun 13, 17:50 UTC7h 0m
2026-06-13 SWA2030 LAS → OAK Jun 13, 06:15 UTCJun 13, 07:45 UTC1h 30m
2026-06-13 SWA2030 LAS → OAK Jun 13, 06:10 UTCJun 13, 07:43 UTC1h 33m
2026-06-13 SWA4025 IND → LAS Jun 13, 02:21 UTCJun 13, 04:05 UTC1h 44m
2026-06-12 SWA4980 ORD → BNA Jun 12, 23:15 UTCJun 13, 01:20 UTC2h 5m
2026-06-12 SWA4980 ORD → BNA Jun 12, 23:13 UTCJun 13, 01:18 UTC2h 5m
2026-06-12 SWA2074 OAK → BUR Jun 12, 21:30 UTCJun 12, 22:00 UTC30m
2026-06-12 SWA2074 OAK → BUR Jun 12, 21:26 UTCJun 12, 22:01 UTC35m
2026-06-12 SWA306 CUN → HOU Jun 12, 17:05 UTCJun 12, 17:40 UTC35m
2026-06-12 SWA751 MCI → CUN Jun 12, 11:45 UTCJun 12, 13:25 UTC1h 40m
2026-06-12 SWA751 MCI → CUN Jun 12, 11:39 UTCJun 12, 14:25 UTC2h 46m
2026-06-12 SWA559 SAN → SJC Jun 12, 02:40 UTCJun 12, 05:00 UTC2h 20m
2026-06-11 SWA1123 STL → BOS Jun 11, 23:20 UTCJun 12, 01:20 UTC2h 1m
2026-06-11 SWA1123 STL → BOS Jun 11, 23:17 UTCJun 12, 01:16 UTC1h 59m
2026-06-11 SWA1247 LAS → OAK Jun 11, 20:05 UTCJun 11, 21:05 UTC1h 0m
2026-06-11 SWA1247 LAS → OAK Jun 11, 20:00 UTCJun 11, 21:03 UTC1h 3m
2026-06-11 SWA1247 LAS → OAK Jun 11, 18:15 UTCJun 11, 18:55 UTC40m
2026-06-11 SWA575 TPA → LGA Jun 11, 16:05 UTCJun 11, 17:10 UTC1h 5m
2026-06-11 SWA3215 ABQ → OAK Jun 11, 13:25 UTCJun 11, 14:55 UTC1h 30m
2026-06-11 SWA2686 BWI → PWM Jun 11, 02:35 UTCJun 11, 05:50 UTC3h 15m
2026-06-10 SWA278 PHL → STL Jun 10, 22:55 UTCJun 11, 00:40 UTC1h 45m
2026-06-10 SWA940 DAL → MAF Jun 10, 21:00 UTCJun 10, 21:55 UTC55m
2026-06-10 SWA3752 HOU → MDW Jun 10, 15:50 UTCJun 10, 19:55 UTC4h 5m
2026-06-10 SWA1537 PHL → STL Jun 10, 12:55 UTCJun 10, 13:45 UTC50m
2026-06-10 SWA1537 PHL → STL Jun 10, 12:51 UTCJun 10, 13:39 UTC48m
2026-06-10 SWA4798 MDW → FLL Jun 10, 01:25 UTCJun 10, 03:00 UTC1h 35m
2026-06-09 SWA172 PDX → OAK Jun 9, 22:50 UTCJun 10, 00:35 UTC1h 45m

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 N8707P page for operator, model, and routing details .

Mode-S ABF9B1 frequently asked

What is Mode-S code ABF9B1?
ABF9B1 is an ICAO 24-bit transponder address. Allocated to United States. Assigned to N8707P.
Where is Mode-S ABF9B1 registered?
Mode-S code ABF9B1 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 ABF9B1 broadcasting right now?
No active broadcast right now. Last signal was 25d ago.
Hex, octal, and decimal Mode-S codes: what's the difference?
The same 24-bit identifier expressed in different bases: hex ABF9B1, octal 52774661, decimal 11,270,577.
What flights does ABF9B1 operate?
Mode-S ABF9B1 has broadcast 20 distinct callsigns, including SWA660, SWA2888, SWA1851, SWA750, SWA502.