sensors Mode-S transponder

ABFC71

ICAO 24-bit transponder address · allocated to United States

Currently assigned to N8710M · BOEING 737 MAX 8 · operated by SOUTHWEST AIRLINES CO

Hex
ABFC71
Octal
52776161
Decimal
11,271,281
Country
US
Tail
N8710M
Type
B38M
Transponder active on ground
Flights observed
11
Distinct callsigns
9
Country
US
Last broadcast
17h ago

Last known position

Most recent position reported by Mode-S ABFC71.

Country allocation

The ICAO 24-bit address ABFC71 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 9 distinct

Callsign Airline Flights Last seen
SWA532 - 2 2026-04-13
SWA1478 Southwest Airlines 2 2026-04-12
SWA3595 - 1 2026-04-13
SWA3185 - 1 2026-04-12
SWA2524 - 1 2026-04-14
SWA2502 - 1 2026-04-13
SWA2271 - 1 2026-04-13
SWA2251 - 1 2026-04-14
SWA2247 - 1 2026-04-13

Recent flights last 11

DateFlightRouteTakeoffLandingDuration
2026-04-14 SWA2251 - Apr 14, 06:51 UTCApr 14, 07:26 UTC35m
2026-04-14 SWA2524 - Apr 14, 05:15 UTCApr 14, 05:35 UTC20m
2026-04-13 SWA2502 - Apr 13, 21:56 UTCApr 13, 22:37 UTC41m
2026-04-13 SWA2247 - Apr 13, 19:13 UTCApr 13, 19:47 UTC34m
2026-04-13 SWA3595 - Apr 13, 17:35 UTCApr 13, 18:00 UTC25m
2026-04-13 SWA2271 - Apr 13, 16:05 UTCApr 13, 16:15 UTC10m
2026-04-13 SWA532 - Apr 13, 07:10 UTCApr 13, 07:40 UTC30m
2026-04-13 SWA532 - Apr 13, 01:16 UTCApr 13, 06:52 UTC5h 36m
2026-04-12 SWA1478 MCI → MCO Apr 12, 23:55 UTCApr 13, 00:15 UTC20m
2026-04-12 SWA1478 MCI → MCO Apr 12, 20:08 UTCApr 13, 00:11 UTC4h 3m
2026-04-12 SWA3185 - Apr 12, 17:18 UTCApr 12, 19:05 UTC1h 47m

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 N8710M page for operator, model, and routing details .

Mode-S ABFC71 frequently asked

What is Mode-S code ABFC71?
ABFC71 is an ICAO 24-bit transponder address. Allocated to United States. Assigned to N8710M.
Where is Mode-S ABFC71 registered?
Mode-S code ABFC71 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 ABFC71 broadcasting right now?
Mode-S ABFC71 is currently broadcasting from the ground.
Hex, octal, and decimal Mode-S codes: what's the difference?
The same 24-bit identifier expressed in different bases: hex ABFC71, octal 52776161, decimal 11,271,281.
What flights does ABFC71 operate?
Mode-S ABFC71 has broadcast 9 distinct callsigns, including SWA532, SWA1478, SWA3595, SWA3185, SWA2524.