Apparatus

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sensors Mode-S transponder

A13668

ICAO 24-bit transponder address · allocated to United States

Currently assigned to N1776R · operated by ROMEO VELA

Hex
A13668
Octal
50233150
Decimal
10,565,224
Country
US
Tail
N1776R
No current signal · last broadcast 1h ago
Flights observed
320
Distinct callsigns
20
Country
US
Last broadcast
1h ago

Last known position

Most recent position reported by Mode-S A13668.

Country allocation

The ICAO 24-bit address A13668 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
SWA8725 Southwest Airlines 4 2026-04-27
SWA1333 Southwest Airlines 4 2026-05-15
SWA493 Southwest Airlines 3 2026-06-02
SWA3651 Southwest Airlines 3 2026-05-11
SWA3548 Southwest Airlines 3 2026-06-06
SWA2960 Southwest Airlines 3 2026-06-09
SWA2725 Southwest Airlines 3 2026-05-10
SWA2691 Southwest Airlines 3 2026-06-07
SWA2575 Southwest Airlines 3 2026-05-27
SWA2495 Southwest Airlines 3 2026-05-14
SWA2130 Southwest Airlines 3 2026-06-02
SWA1778 Southwest Airlines 3 2026-05-02
SWA1433 Southwest Airlines 3 2026-05-25
SWA1421 Southwest Airlines 3 2026-04-30
SWA1270 Southwest Airlines 3 2026-05-11
SWA1156 Southwest Airlines 3 2026-05-31
SWA992 Southwest Airlines 2 2026-06-09
SWA935 Southwest Airlines 2 2026-05-12
SWA872 Southwest Airlines 2 2026-06-02
SWA867 Southwest Airlines 2 2026-05-31

Recent flights last 50

DateFlightRouteTakeoffLandingDuration
2026-06-13 SWA1286 SJC → PDX Jun 13, 19:50 UTCJun 13, 20:00 UTC10m
2026-06-13 SWA3202 SJC → PDX Jun 13, 16:39 UTCJun 13, 18:42 UTC2h 3m
2026-06-13 SWA3751 DAL → COS Jun 13, 12:30 UTCJun 13, 13:45 UTC1h 15m
2026-06-13 SWA849 MCO → ALB Jun 13, 06:05 UTCJun 13, 07:15 UTC1h 10m
2026-06-13 SWA4285 BWI → SJU Jun 13, 03:15 UTCJun 13, 04:45 UTC1h 29m
2026-06-12 SWA4124 OGG → OAK Jun 12, 21:50 UTCJun 13, 02:05 UTC4h 15m
2026-06-12 SWA4478 MDW → CLT Jun 12, 18:20 UTCJun 12, 20:20 UTC2h 0m
2026-06-12 SWA167 - Jun 12, 14:01 UTCJun 12, 16:20 UTC2h 20m
2026-06-12 SWA167 MCO → DAL Jun 12, 13:58 UTCJun 12, 16:45 UTC2h 47m
2026-06-12 SWA2209 PHX → OAK Jun 12, 10:25 UTCJun 12, 12:35 UTC2h 10m
2026-06-12 SWA2209 PHX → OAK Jun 12, 10:21 UTCJun 12, 12:35 UTC2h 14m
2026-06-12 SWA563 LAS → DAL Jun 12, 04:10 UTCJun 12, 05:25 UTC1h 15m
2026-06-12 SWA563 LAS → DAL Jun 12, 04:09 UTCJun 12, 05:22 UTC1h 13m
2026-06-12 SWA2157 ONT → SJC Jun 12, 01:30 UTCJun 12, 02:50 UTC1h 20m
2026-06-12 SWA2157 ONT → SJC Jun 12, 01:30 UTCJun 12, 02:40 UTC1h 10m
2026-06-11 SWA971 SJC → PDX Jun 11, 23:00 UTCJun 12, 00:35 UTC1h 35m
2026-06-11 SWA4434 SNA → DEN Jun 11, 18:15 UTCJun 11, 21:15 UTC3h 0m
2026-06-11 SWA2628 LAS → SJC Jun 11, 10:35 UTCJun 11, 14:15 UTC3h 40m
2026-06-10 SWA1086 LAS → OAK Jun 10, 23:50 UTCJun 11, 02:00 UTC2h 10m
2026-06-10 SWA2598 LAX → OAK Jun 10, 20:15 UTCJun 10, 22:25 UTC2h 10m
2026-06-10 SWA2034 SJC → LAS Jun 10, 16:00 UTCJun 10, 17:55 UTC1h 55m
2026-06-10 SWA204 PIT → STL Jun 10, 12:45 UTCJun 10, 14:15 UTC1h 30m
2026-06-10 SWA1468 LGA → ATL Jun 10, 03:40 UTCJun 10, 04:35 UTC55m
2026-06-10 SWA4333 DCA → DAL Jun 10, 00:45 UTCJun 10, 02:30 UTC1h 45m
2026-06-09 SWA4333 DCA → DAL Jun 9, 23:00 UTCJun 9, 23:45 UTC45m
2026-06-09 SWA1388 DEN → PDX Jun 9, 20:50 UTCJun 9, 21:45 UTC55m
2026-06-09 SWA2960 STL → PHX Jun 9, 18:55 UTCJun 9, 20:10 UTC1h 15m
2026-06-09 SWA2960 STL → PHX Jun 9, 17:50 UTCJun 9, 20:00 UTC2h 10m
2026-06-09 SWA2960 STL → PHX Jun 9, 16:40 UTCJun 9, 18:39 UTC1h 59m
2026-06-09 SWA4738 DEN → DTW Jun 9, 13:10 UTCJun 9, 15:35 UTC2h 25m
2026-06-09 SWA4738 DEN → DTW Jun 9, 12:52 UTCJun 9, 15:32 UTC2h 40m
2026-06-09 SWA992 PHX → OAK Jun 9, 05:40 UTCJun 9, 06:50 UTC1h 10m
2026-06-09 SWA992 PHX → OAK Jun 9, 05:37 UTCJun 9, 07:08 UTC1h 31m
2026-06-09 SWA2288 BWI → CHS Jun 9, 01:45 UTCJun 9, 04:20 UTC2h 35m
2026-06-08 SWA4807 DAL → PHL Jun 8, 22:10 UTCJun 9, 00:40 UTC2h 30m
2026-06-08 SWA3075 SAN → SJC Jun 8, 19:40 UTCJun 8, 20:45 UTC1h 5m
2026-06-08 SWA4166 SJC → LAX Jun 8, 17:20 UTCJun 8, 18:25 UTC1h 5m
2026-06-08 SWA4166 SJC → LAX Jun 8, 17:15 UTCJun 8, 18:21 UTC1h 6m
2026-06-08 SWA1460 SAN → HOU Jun 8, 14:50 UTCJun 8, 16:05 UTC1h 15m
2026-06-08 SWA3629 SFO → LAX Jun 8, 12:15 UTCJun 8, 13:35 UTC1h 20m
2026-06-08 SWA700 SMF → ONT Jun 8, 08:10 UTCJun 8, 09:45 UTC1h 35m
2026-06-08 SWA4270 LAS → SMF Jun 8, 06:05 UTCJun 8, 07:10 UTC1h 5m
2026-06-08 SWA976 DEN → MDW Jun 8, 00:30 UTCJun 8, 05:00 UTC4h 30m
2026-06-07 SWA426 LGB → OAK Jun 7, 22:10 UTCJun 7, 23:10 UTC1h 0m
2026-06-07 SWA4760 MSY → DAL Jun 7, 19:25 UTCJun 7, 20:30 UTC1h 5m
2026-06-07 SWA4760 MSY → DAL Jun 7, 19:22 UTCJun 7, 20:31 UTC1h 10m
2026-06-07 SWA197 MDW → DEN Jun 7, 16:20 UTCJun 7, 18:05 UTC1h 45m
2026-06-07 SWA197 MDW → DEN Jun 7, 14:25 UTCJun 7, 14:40 UTC15m
2026-06-07 SWA2691 SYR → BWI Jun 7, 12:55 UTCJun 7, 13:15 UTC20m
2026-06-07 SWA2691 SYR → BWI Jun 7, 10:45 UTCJun 7, 11:35 UTC50m

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 N1776R page for operator, model, and routing details .

Mode-S A13668 frequently asked

What is Mode-S code A13668?
A13668 is an ICAO 24-bit transponder address. Allocated to United States. Assigned to N1776R.
Where is Mode-S A13668 registered?
Mode-S code A13668 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 A13668 broadcasting right now?
No active broadcast right now. Last signal was 1h ago.
Hex, octal, and decimal Mode-S codes: what's the difference?
The same 24-bit identifier expressed in different bases: hex A13668, octal 50233150, decimal 10,565,224.
What flights does A13668 operate?
Mode-S A13668 has broadcast 20 distinct callsigns, including SWA8725, SWA1333, SWA493, SWA3651, SWA3548.