Apparatus

Try JFK, AAL1290, BAW, or N225AN.

sensors Mode-S transponder

AC13D6

ICAO 24-bit transponder address · allocated to United States

Currently assigned to N878Q · BOEING 737 MAX 8 · operated by SOUTHWEST AIRLINES CO

Hex
AC13D6
Octal
53011726
Decimal
11,277,270
Country
US
Tail
N878Q
Type
B38M
No current signal · last broadcast Jul 26, 21:30 UTC
Flights observed
730
Distinct callsigns
20
Country
US
Last broadcast
Jul 26, 21:30 UTC

Last known position

Most recent position reported by Mode-S AC13D6.

Country allocation

The ICAO 24-bit address AC13D6 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
SWA3895 Southwest Airlines 7 2026-05-20
SWA501 Southwest Airlines 5 2026-04-22
SWA1893 Southwest Airlines 5 2026-05-29
SWA1561 Southwest Airlines 5 2026-04-22
SWA1178 Southwest Airlines 5 2026-05-31
SWA4279 Southwest Airlines 4 2026-05-18
SWA3648 - 4 2026-04-13
SWA3089 - 4 2026-07-14
SWA3060 - 4 2026-07-13
SWA2186 Southwest Airlines 4 2026-07-21
SWA2035 Southwest Airlines 4 2026-05-30
SWA180 Southwest Airlines 4 2026-07-07
SWA1678 Southwest Airlines 4 2026-05-23
SWA1203 Southwest Airlines 4 2026-04-22
SWA1053 Southwest Airlines 4 2026-05-18
SWA920 Southwest Airlines 3 2026-05-12
SWA868 Southwest Airlines 3 2026-05-17
SWA4130 - 3 2026-07-01
SWA4029 Southwest Airlines 3 2026-05-18
SWA4020 Southwest Airlines 3 2026-04-24

Recent flights last 50

DateFlightRouteTakeoffLandingDuration
2026-07-26 SWA641 SJD → SNA Jul 26, 21:00 UTCJul 26, 21:30 UTC30m
2026-07-26 SWA150 AMA → AUS Jul 26, 16:40 UTCJul 26, 18:00 UTC1h 20m
2026-07-26 SWA150 AMA → AUS Jul 26, 16:37 UTCJul 26, 18:39 UTC2h 2m
2026-07-25 SWA1288 RDU → AUS Jul 25, 22:00 UTCJul 25, 23:40 UTC1h 40m
2026-07-25 SWA3595 ONT → LAS Jul 25, 19:20 UTCJul 25, 20:55 UTC1h 35m
2026-07-25 SWA3595 ONT → LAS Jul 25, 19:17 UTCJul 25, 20:55 UTC1h 38m
2026-07-25 SWA3784 DEN → ELP Jul 25, 17:00 UTCJul 25, 18:05 UTC1h 5m
2026-07-25 SWA3784 DEN → ELP Jul 25, 16:59 UTCJul 25, 18:11 UTC1h 12m
2026-07-25 SWA2503 SNA → SJC Jul 25, 15:05 UTCJul 25, 16:05 UTC1h 0m
2026-07-25 SWA4934 BUR → OAK Jul 25, 03:05 UTCJul 25, 04:10 UTC1h 5m
2026-07-25 SWA3105 BWI → MDW Jul 25, 01:15 UTCJul 25, 02:05 UTC50m
2026-07-24 SWA2200 SAN → OAK Jul 24, 14:35 UTCJul 24, 15:25 UTC50m
2026-07-24 SWA660 SAN → OAK Jul 24, 06:00 UTCJul 24, 07:00 UTC1h 0m
2026-07-24 SWA3119 RNO → SJC Jul 24, 02:55 UTCJul 24, 05:00 UTC2h 5m
2026-07-24 SWA1653 DEN → PHX Jul 24, 00:10 UTCJul 24, 01:20 UTC1h 10m
2026-07-23 SWA2455 SLC → PHX Jul 23, 19:05 UTCJul 23, 22:38 UTC3h 33m
2026-07-23 SWA2455 SLC → PHX Jul 23, 19:10 UTCJul 23, 22:45 UTC3h 35m
2026-07-23 SWA1966 TUS → HOU Jul 23, 15:40 UTCJul 23, 17:25 UTC1h 45m
2026-07-23 SWA2959 LAX → HOU Jul 23, 13:05 UTCJul 23, 14:00 UTC55m
2026-07-23 SWA1772 SMF → PDX Jul 23, 10:55 UTCJul 23, 11:45 UTC50m
2026-07-23 SWA1772 SMF → PDX Jul 23, 10:51 UTCJul 23, 11:44 UTC53m
2026-07-23 SWA2940 HOU → DCA Jul 23, 04:30 UTCJul 23, 05:45 UTC1h 15m
2026-07-23 SWA2549 SJU → BWI Jul 23, 01:55 UTCJul 23, 03:30 UTC1h 35m
2026-07-22 SWA3038 DEN → LGA Jul 22, 18:45 UTCJul 22, 21:00 UTC2h 15m
2026-07-22 SWA3038 DEN → LGA Jul 22, 16:15 UTCJul 22, 17:25 UTC1h 10m
2026-07-22 SWA4611 MCI → DCA Jul 22, 13:25 UTCJul 22, 15:05 UTC1h 40m
2026-07-22 SWA3873 MDW → CHS Jul 22, 04:00 UTCJul 22, 05:05 UTC1h 5m
2026-07-22 SWA3714 BWI → DTW Jul 22, 02:00 UTCJul 22, 03:00 UTC1h 0m
2026-07-21 SWA1666 PDX → OAK Jul 21, 23:00 UTCJul 22, 01:00 UTC2h 0m
2026-07-21 SWA503 LAX → STL Jul 21, 19:20 UTCJul 21, 21:35 UTC2h 15m
2026-07-21 SWA4297 PHX → MDW Jul 21, 17:15 UTCJul 21, 18:10 UTC55m
2026-07-21 SWA1187 SFO → LAS Jul 21, 14:20 UTCJul 21, 16:10 UTC1h 50m
2026-07-21 SWA1187 SFO → LAS Jul 21, 14:19 UTCJul 21, 16:03 UTC1h 44m
2026-07-21 SWA3694 PWM → BWI Jul 21, 10:40 UTCJul 21, 13:00 UTC2h 20m
2026-07-21 SWA2186 LAS → SFO Jul 21, 04:20 UTCJul 21, 06:50 UTC2h 30m
2026-07-21 SWA2186 LAS → SFO Jul 21, 04:19 UTCJul 21, 06:44 UTC2h 25m
2026-07-21 SWA2003 OAK → ONT Jul 21, 00:45 UTCJul 21, 03:20 UTC2h 35m
2026-07-20 SWA45 DAL → HOU Jul 20, 22:55 UTCJul 20, 23:40 UTC45m
2026-07-20 SWA45 DAL → HOU Jul 20, 19:50 UTCJul 20, 22:15 UTC2h 25m
2026-07-20 SWA4700 SNA → OAK Jul 20, 16:30 UTCJul 20, 18:35 UTC2h 5m
2026-07-20 SWA4274 HOU → ELP Jul 20, 12:20 UTCJul 20, 15:25 UTC3h 5m
2026-07-20 SWA4274 HOU → ELP Jul 20, 12:18 UTCJul 20, 15:21 UTC3h 3m
2026-07-20 SWA4365 DAL → HRL Jul 20, 02:50 UTCJul 20, 05:45 UTC2h 55m
2026-07-20 SWA5071 MCO → MSY Jul 20, 00:15 UTCJul 20, 01:25 UTC1h 10m
2026-07-19 SWA5070 HOU → RSW Jul 19, 22:05 UTCJul 19, 23:05 UTC1h 0m
2026-07-19 SWA5069 CMH → ATL Jul 19, 18:37 UTCJul 19, 20:52 UTC2h 15m
2026-07-19 SWA5069 CMH → ATL Jul 19, 18:40 UTCJul 19, 20:50 UTC2h 10m
2026-07-19 SWA5068 CMH → ATL Jul 19, 14:40 UTCJul 19, 16:55 UTC2h 15m
2026-07-18 SWA1973 MCO → DAL Jul 18, 02:45 UTCJul 18, 05:05 UTC2h 21m
2026-07-18 SWA1973 MCO → DAL Jul 18, 02:44 UTCJul 18, 04:57 UTC2h 14m

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 N878Q page for operator, model, and routing details .

Mode-S AC13D6 frequently asked

What is Mode-S code AC13D6?
AC13D6 is an ICAO 24-bit transponder address. Allocated to United States. Assigned to N878Q.
Where is Mode-S AC13D6 registered?
Mode-S code AC13D6 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 AC13D6 broadcasting right now?
No active broadcast right now. Last signal was Jul 26, 21:30 UTC.
Hex, octal, and decimal Mode-S codes: what's the difference?
The same 24-bit identifier expressed in different bases: hex AC13D6, octal 53011726, decimal 11,277,270.
What flights does AC13D6 operate?
Mode-S AC13D6 has broadcast 20 distinct callsigns, including SWA3895, SWA501, SWA1893, SWA1561, SWA1178.