Apparatus

Try JFK, AAL1290, BAW, or N225AN.

sensors Mode-S transponder

A717B6

ICAO 24-bit transponder address · allocated to United States

Currently assigned to N556WN · BOEING 737-700 · operated by SOUTHWEST AIRLINES CO

Hex
A717B6
Octal
51613666
Decimal
10,950,582
Country
US
Tail
N556WN
Type
B737
Broadcasting now · callsign SWA4387 · 33,000 ft
Flights observed
660
Distinct callsigns
20
Country
US
Last broadcast
1h ago

Current position

A717B6 is currently broadcasting. Map zoomed to live position.

Country allocation

The ICAO 24-bit address A717B6 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
SWA2715 Southwest Airlines 7 2026-05-14
SWA3641 Southwest Airlines 6 2026-04-26
SWA328 Southwest Airlines 6 2026-07-02
SWA131 Southwest Airlines 6 2026-05-09
SWA1005 Southwest Airlines 6 2026-05-24
SWA4390 Southwest Airlines 5 2026-07-06
SWA4020 Southwest Airlines 5 2026-05-31
SWA300 - 5 2026-06-19
SWA2695 - 5 2026-06-29
SWA691 Southwest Airlines 4 2026-05-21
SWA3341 - 4 2026-07-09
SWA3124 - 4 2026-06-25
SWA2948 - 4 2026-04-15
SWA2407 - 4 2026-07-06
SWA2298 - 4 2026-06-29
SWA1896 Southwest Airlines 4 2026-04-17
SWA1450 Southwest Airlines 4 2026-06-16
SWA1447 - 4 2026-07-05
SWA1013 Southwest Airlines 4 2026-05-29
SWA869 - 3 2026-07-11

Recent flights last 50

DateFlightRouteTakeoffLandingDuration
2026-07-13 SWA1795 PHX → DAL Jul 13, 23:20 UTCJul 14, 02:40 UTC3h 20m
2026-07-13 SWA1795 - Jul 13, 17:55 UTCJul 13, 21:55 UTC4h 0m
2026-07-13 SWA1795 - Jul 13, 15:40 UTCJul 13, 16:55 UTC1h 15m
2026-07-13 SWA4062 - Jul 13, 13:10 UTCJul 13, 14:20 UTC1h 10m
2026-07-13 SWA2982 BNA → VPS Jul 13, 01:40 UTCJul 13, 02:35 UTC55m
2026-07-12 SWA2933 - Jul 12, 23:10 UTCJul 13, 00:25 UTC1h 15m
2026-07-12 SWA2933 AUS → ECP Jul 12, 20:40 UTCJul 12, 22:15 UTC1h 35m
2026-07-12 SWA1433 DEN → AUS Jul 12, 17:55 UTCJul 12, 19:35 UTC1h 40m
2026-07-12 SWA1433 - Jul 12, 15:40 UTCJul 12, 16:45 UTC1h 5m
2026-07-12 SWA1433 - Jul 12, 13:35 UTCJul 12, 14:30 UTC55m
2026-07-12 SWA4345 ATL → STL Jul 12, 11:10 UTCJul 12, 12:25 UTC1h 15m
2026-07-12 SWA3883 - Jul 12, 01:10 UTCJul 12, 02:25 UTC1h 15m
2026-07-12 SWA3883 STL → ATL Jul 12, 01:06 UTCJul 12, 02:17 UTC1h 12m
2026-07-11 SWA1879 - Jul 11, 22:01 UTCJul 11, 23:20 UTC1h 20m
2026-07-11 SWA1879 VPS → STL Jul 11, 21:56 UTCJul 11, 23:24 UTC1h 28m
2026-07-11 SWA1129 - Jul 11, 19:05 UTCJul 11, 20:50 UTC1h 45m
2026-07-11 SWA1129 BWI → VPS Jul 11, 19:01 UTCJul 11, 20:57 UTC1h 56m
2026-07-11 SWA1623 - Jul 11, 16:45 UTCJul 11, 17:45 UTC1h 0m
2026-07-11 SWA1623 CMH → BWI Jul 11, 16:44 UTCJul 11, 17:41 UTC57m
2026-07-11 SWA4524 - Jul 11, 15:00 UTCJul 11, 15:50 UTC50m
2026-07-11 SWA246 - Jul 11, 13:00 UTCJul 11, 14:00 UTC1h 0m
2026-07-11 SWA869 - Jul 11, 11:05 UTCJul 11, 11:50 UTC45m
2026-07-11 SWA983 - Jul 11, 03:30 UTCJul 11, 05:31 UTC2h 0m
2026-07-11 SWA2710 MCO → SRQ Jul 11, 02:25 UTCJul 11, 02:50 UTC25m
2026-07-11 SWA2710 MCO → SRQ Jul 11, 02:24 UTCJul 11, 02:51 UTC27m
2026-07-10 SWA3656 - Jul 10, 22:55 UTCJul 11, 00:50 UTC1h 55m
2026-07-10 SWA3656 - Jul 10, 20:15 UTCJul 10, 21:55 UTC1h 40m
2026-07-10 SWA3896 SAN → BWI Jul 10, 14:29 UTCJul 10, 19:01 UTC4h 32m
2026-07-10 SWA3896 - Jul 10, 14:30 UTCJul 10, 19:10 UTC4h 40m
2026-07-10 SWA3426 PHX → SAN Jul 10, 05:10 UTCJul 10, 06:00 UTC50m
2026-07-10 SWA3526 - Jul 10, 03:25 UTCJul 10, 04:20 UTC55m
2026-07-10 SWA3526 - Jul 10, 01:35 UTCJul 10, 02:40 UTC1h 5m
2026-07-09 SWA3526 - Jul 9, 23:10 UTCJul 10, 00:00 UTC50m
2026-07-09 SWA3845 LAS → ONT Jul 9, 21:40 UTCJul 9, 22:15 UTC35m
2026-07-09 SWA3257 COS → LAS Jul 9, 18:55 UTCJul 9, 20:30 UTC1h 35m
2026-07-09 SWA3257 - Jul 9, 16:15 UTCJul 9, 17:45 UTC1h 30m
2026-07-09 SWA3012 - Jul 9, 13:10 UTCJul 9, 15:00 UTC1h 50m
2026-07-09 SWA539 - Jul 9, 02:10 UTCJul 9, 02:50 UTC40m
2026-07-09 SWA539 BNA → IND Jul 9, 02:10 UTCJul 9, 02:52 UTC42m
2026-07-09 SWA3341 - Jul 9, 00:15 UTCJul 9, 00:50 UTC35m
2026-07-08 SWA3341 - Jul 8, 22:55 UTCJul 9, 00:50 UTC1h 55m
2026-07-08 SWA3341 ECP → BNA Jul 8, 22:52 UTCJul 9, 00:00 UTC1h 8m
2026-07-08 SWA3341 - Jul 8, 20:30 UTCJul 8, 22:05 UTC1h 35m
2026-07-08 SWA932 - Jul 8, 18:40 UTCJul 8, 19:40 UTC1h 0m
2026-07-08 SWA2621 - Jul 8, 16:35 UTCJul 8, 17:45 UTC1h 10m
2026-07-08 SWA1901 - Jul 8, 14:15 UTCJul 8, 14:40 UTC25m
2026-07-08 SWA4797 - Jul 8, 01:05 UTCJul 8, 01:20 UTC15m
2026-07-07 SWA721 - Jul 7, 21:15 UTCJul 7, 23:20 UTC2h 5m
2026-07-07 SWA2017 SMF → SJD Jul 7, 16:25 UTCJul 7, 17:50 UTC1h 25m
2026-07-07 SWA2017 SMF → SJD Jul 7, 16:25 UTCJul 7, 19:06 UTC2h 41m

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 N556WN page for operator, model, and routing details .

Mode-S A717B6 frequently asked

What is Mode-S code A717B6?
A717B6 is an ICAO 24-bit transponder address. Allocated to United States. Assigned to N556WN.
Where is Mode-S A717B6 registered?
Mode-S code A717B6 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 A717B6 broadcasting right now?
Yes. Mode-S A717B6 is currently airborne.
Hex, octal, and decimal Mode-S codes: what's the difference?
The same 24-bit identifier expressed in different bases: hex A717B6, octal 51613666, decimal 10,950,582.
What flights does A717B6 operate?
Mode-S A717B6 has broadcast 20 distinct callsigns, including SWA2715, SWA3641, SWA328, SWA131, SWA1005.