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sensors Mode-S transponder

A615D0

ICAO 24-bit transponder address · allocated to United States

Currently assigned to N491WN · BOEING 737-700 · operated by SOUTHWEST AIRLINES CO

Hex
A615D0
Octal
51412720
Decimal
10,884,560
Country
US
Tail
N491WN
Type
B737
Broadcasting now · callsign SWA3834 · 1,200 ft
Flights observed
661
Distinct callsigns
20
Country
US
Last broadcast
1h ago

Current position

A615D0 is currently broadcasting. Map zoomed to live position.

Country allocation

The ICAO 24-bit address A615D0 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
SWA913 - 6 2026-06-28
SWA863 Southwest Airlines 6 2026-05-04
SWA323 Southwest Airlines 6 2026-06-14
SWA962 - 5 2026-07-09
SWA726 - 5 2026-06-24
SWA470 Southwest Airlines 5 2026-05-28
SWA300 Southwest Airlines 5 2026-06-05
SWA23 Southwest Airlines 5 2026-04-19
SWA2168 Southwest Airlines 5 2026-04-16
SWA1472 Southwest Airlines 5 2026-06-01
SWA1271 Southwest Airlines 5 2026-04-27
SWA856 - 4 2026-06-23
SWA801 - 4 2026-07-12
SWA4396 Southwest Airlines 4 2026-05-16
SWA3316 Southwest Airlines 4 2026-05-18
SWA3078 Southwest Airlines 4 2026-04-29
SWA3035 Southwest Airlines 4 2026-06-20
SWA2951 - 4 2026-06-19
SWA244 Southwest Airlines 4 2026-04-17
SWA204 - 4 2026-04-14

Recent flights last 50

DateFlightRouteTakeoffLandingDuration
2026-07-15 SWA3834 - Jul 15, 01:25 UTCJul 15, 02:00 UTC35m
2026-07-14 SWA4464 - Jul 14, 23:10 UTCJul 15, 00:15 UTC1h 5m
2026-07-14 SWA3076 - Jul 14, 21:00 UTCJul 14, 22:10 UTC1h 10m
2026-07-14 SWA2748 - Jul 14, 18:45 UTCJul 14, 19:35 UTC50m
2026-07-14 SWA3037 - Jul 14, 17:00 UTCJul 14, 17:50 UTC50m
2026-07-14 SWA543 SEA → OAK Jul 14, 14:10 UTCJul 14, 16:00 UTC1h 50m
2026-07-14 SWA4144 - Jul 14, 03:55 UTCJul 14, 07:30 UTC3h 35m
2026-07-14 SWA4144 MDW → SEA Jul 14, 03:53 UTCJul 14, 07:31 UTC3h 39m
2026-07-14 SWA1163 - Jul 14, 01:55 UTCJul 14, 02:40 UTC45m
2026-07-14 SWA4506 - Jul 14, 00:30 UTCJul 14, 01:20 UTC50m
2026-07-14 SWA4506 MDW → CLE Jul 14, 00:30 UTCJul 14, 01:19 UTC49m
2026-07-13 SWA4506 - Jul 13, 18:40 UTCJul 13, 21:50 UTC3h 10m
2026-07-13 SWA2327 STL → LAS Jul 13, 14:21 UTCJul 13, 17:08 UTC2h 47m
2026-07-13 SWA2327 STL → LAS Jul 13, 14:25 UTCJul 13, 17:10 UTC2h 45m
2026-07-13 SWA2327 - Jul 13, 12:30 UTCJul 13, 13:15 UTC45m
2026-07-13 SWA1327 - Jul 13, 02:35 UTCJul 13, 03:40 UTC1h 5m
2026-07-12 SWA1327 - Jul 12, 22:40 UTCJul 13, 01:30 UTC2h 50m
2026-07-12 SWA1327 - Jul 12, 20:30 UTCJul 12, 21:35 UTC1h 5m
2026-07-12 SWA801 - Jul 12, 18:30 UTCJul 12, 19:25 UTC55m
2026-07-12 SWA801 - Jul 12, 16:45 UTCJul 12, 17:25 UTC40m
2026-07-12 SWA801 EUG → LAS Jul 12, 13:25 UTCJul 12, 15:15 UTC1h 50m
2026-07-12 SWA3424 DEN → EUG Jul 12, 03:25 UTCJul 12, 05:40 UTC2h 15m
2026-07-12 SWA3424 DEN → EUG Jul 12, 03:23 UTCJul 12, 05:46 UTC2h 23m
2026-07-12 SWA2736 OAK → DEN Jul 12, 00:06 UTCJul 12, 02:09 UTC2h 3m
2026-07-12 SWA2736 OAK → DEN Jul 12, 00:05 UTCJul 12, 02:10 UTC2h 5m
2026-07-11 SWA4488 LAS → OAK Jul 11, 22:06 UTCJul 11, 23:10 UTC1h 5m
2026-07-11 SWA4488 LAS → OAK Jul 11, 22:10 UTCJul 11, 23:10 UTC1h 0m
2026-07-11 SWA4488 OKC → LAS Jul 11, 18:45 UTCJul 11, 20:55 UTC2h 10m
2026-07-11 SWA1652 DEN → OKC Jul 11, 16:40 UTCJul 11, 17:45 UTC1h 5m
2026-07-11 SWA3233 - Jul 11, 06:45 UTCJul 11, 08:10 UTC1h 25m
2026-07-11 SWA3233 PHX → DEN Jul 11, 06:45 UTCJul 11, 08:06 UTC1h 21m
2026-07-11 SWA3538 - Jul 11, 04:50 UTCJul 11, 06:01 UTC1h 10m
2026-07-11 SWA3538 SJC → SLC Jul 11, 02:50 UTCJul 11, 04:15 UTC1h 25m
2026-07-11 SWA840 BUR → SJC Jul 11, 01:15 UTCJul 11, 02:00 UTC45m
2026-07-11 SWA840 BUR → SJC Jul 11, 01:13 UTCJul 11, 02:01 UTC48m
2026-07-10 SWA3768 SMF → BUR Jul 10, 23:15 UTCJul 11, 00:10 UTC55m
2026-07-10 SWA2008 LAX → SMF Jul 10, 21:05 UTCJul 10, 22:05 UTC1h 0m
2026-07-10 SWA2008 LAX → SMF Jul 10, 21:05 UTCJul 10, 22:03 UTC58m
2026-07-10 SWA2008 - Jul 10, 17:15 UTCJul 10, 20:05 UTC2h 50m
2026-07-10 SWA2524 - Jul 10, 15:05 UTCJul 10, 16:10 UTC1h 5m
2026-07-10 SWA801 - Jul 10, 12:50 UTCJul 10, 13:40 UTC50m
2026-07-10 SWA3109 OKC → DAL Jul 10, 11:05 UTCJul 10, 11:40 UTC35m
2026-07-10 SWA198 DAL → OKC Jul 10, 03:20 UTCJul 10, 03:55 UTC35m
2026-07-10 SWA198 DAL → OKC Jul 10, 03:17 UTCJul 10, 03:53 UTC36m
2026-07-10 SWA198 - Jul 10, 00:45 UTCJul 10, 02:25 UTC1h 40m
2026-07-09 SWA962 - Jul 9, 22:35 UTCJul 9, 23:50 UTC1h 15m
2026-07-09 SWA4126 - Jul 9, 18:45 UTCJul 9, 19:55 UTC1h 10m
2026-07-09 SWA952 - Jul 9, 16:50 UTCJul 9, 17:50 UTC1h 0m
2026-07-09 SWA313 - Jul 9, 14:30 UTCJul 9, 15:45 UTC1h 15m
2026-07-09 SWA313 AUS → IND Jul 9, 11:25 UTCJul 9, 13:35 UTC2h 10m

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 N491WN page for operator, model, and routing details .

Mode-S A615D0 frequently asked

What is Mode-S code A615D0?
A615D0 is an ICAO 24-bit transponder address. Allocated to United States. Assigned to N491WN.
Where is Mode-S A615D0 registered?
Mode-S code A615D0 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 A615D0 broadcasting right now?
Yes. Mode-S A615D0 is currently airborne.
Hex, octal, and decimal Mode-S codes: what's the difference?
The same 24-bit identifier expressed in different bases: hex A615D0, octal 51412720, decimal 10,884,560.
What flights does A615D0 operate?
Mode-S A615D0 has broadcast 20 distinct callsigns, including SWA913, SWA863, SWA323, SWA962, SWA726.