Apparatus

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sensors Mode-S transponder

AC61BC

ICAO 24-bit transponder address · allocated to United States

Currently assigned to N8970Q · BOEING 737 MAX 8 · operated by BOEING CO

Hex
AC61BC
Octal
53060674
Decimal
11,297,212
Country
US
Tail
N8970Q
Type
B38M
No current signal · last broadcast 1h ago
Flights observed
700
Distinct callsigns
20
Country
US
Last broadcast
1h ago

Last known position

Most recent position reported by Mode-S AC61BC.

Country allocation

The ICAO 24-bit address AC61BC 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
SWA4470 - 5 2026-07-13
SWA4139 Southwest Airlines 5 2026-05-28
SWA873 - 4 2026-07-12
SWA759 Southwest Airlines 4 2026-04-18
SWA2940 Southwest Airlines 4 2026-04-13
SWA284 - 4 2026-07-13
SWA2226 Southwest Airlines 4 2026-06-03
SWA2172 Southwest Airlines 4 2026-05-28
SWA2092 - 4 2026-06-29
SWA1838 Southwest Airlines 4 2026-05-14
SWA1734 - 4 2026-06-26
SWA1728 - 4 2026-06-19
SWA1712 Southwest Airlines 4 2026-06-18
SWA1615 - 4 2026-06-27
SWA1382 - 4 2026-07-09
SWA974 Southwest Airlines 3 2026-06-05
SWA776 Southwest Airlines 3 2026-05-22
SWA642 - 3 2026-06-18
SWA577 - 3 2026-06-30
SWA4897 - 3 2026-07-06

Recent flights last 50

DateFlightRouteTakeoffLandingDuration
2026-07-13 SWA284 - Jul 13, 23:15 UTCJul 14, 01:00 UTC1h 45m
2026-07-13 SWA284 - Jul 13, 21:10 UTCJul 13, 22:00 UTC50m
2026-07-13 SWA4470 - Jul 13, 18:00 UTCJul 13, 20:10 UTC2h 10m
2026-07-13 SWA4470 - Jul 13, 14:30 UTCJul 13, 16:40 UTC2h 10m
2026-07-13 SWA4470 - Jul 13, 11:35 UTCJul 13, 13:20 UTC1h 45m
2026-07-13 SWA3965 LAS → BOI Jul 13, 06:55 UTCJul 13, 08:15 UTC1h 20m
2026-07-13 SWA3965 LAS → BOI Jul 13, 06:54 UTCJul 13, 08:11 UTC1h 17m
2026-07-13 SWA3167 DEN → LAS Jul 13, 03:49 UTCJul 13, 05:17 UTC1h 29m
2026-07-13 SWA3167 DEN → LAS Jul 13, 03:50 UTCJul 13, 05:20 UTC1h 30m
2026-07-12 SWA2887 - Jul 12, 23:50 UTCJul 13, 02:20 UTC2h 30m
2026-07-12 SWA2887 CLE → DEN Jul 12, 23:50 UTCJul 13, 02:16 UTC2h 26m
2026-07-12 SWA3720 LAS → CLE Jul 12, 18:50 UTCJul 12, 22:35 UTC3h 45m
2026-07-12 SWA3720 LAS → CLE Jul 12, 18:50 UTCJul 12, 22:30 UTC3h 40m
2026-07-12 SWA3720 - Jul 12, 16:50 UTCJul 12, 17:45 UTC55m
2026-07-12 SWA1006 - Jul 12, 14:25 UTCJul 12, 15:10 UTC45m
2026-07-12 SWA1006 LAS → RNO Jul 12, 14:24 UTCJul 12, 15:16 UTC52m
2026-07-12 SWA1006 - Jul 12, 09:25 UTCJul 12, 12:55 UTC3h 30m
2026-07-12 SWA873 LAS → CMH Jul 12, 02:10 UTCJul 12, 05:39 UTC3h 29m
2026-07-12 SWA873 LAS → CMH Jul 12, 02:10 UTCJul 12, 05:40 UTC3h 30m
2026-07-11 SWA873 SMF → LAS Jul 11, 23:50 UTCJul 12, 00:50 UTC1h 0m
2026-07-11 SWA2209 SLC → SMF Jul 11, 21:30 UTCJul 11, 22:46 UTC1h 16m
2026-07-11 SWA2209 SLC → SMF Jul 11, 21:30 UTCJul 11, 22:50 UTC1h 20m
2026-07-11 SWA1732 DEN → SLC Jul 11, 19:10 UTCJul 11, 20:10 UTC1h 0m
2026-07-11 SWA1732 DEN → SLC Jul 11, 19:10 UTCJul 11, 20:06 UTC56m
2026-07-11 SWA3739 SLC → DEN Jul 11, 17:07 UTCJul 11, 18:04 UTC58m
2026-07-11 SWA3739 SLC → DEN Jul 11, 17:10 UTCJul 11, 18:10 UTC1h 0m
2026-07-11 SWA2957 LAS → SLC Jul 11, 15:00 UTCJul 11, 16:00 UTC1h 0m
2026-07-11 SWA3574 LAS → PIT Jul 11, 11:25 UTCJul 11, 13:40 UTC2h 15m
2026-07-11 SWA3574 LAS → PIT Jul 11, 11:22 UTCJul 11, 13:35 UTC2h 13m
2026-07-11 SWA296 - Jul 11, 04:45 UTCJul 11, 05:40 UTC55m
2026-07-11 SWA296 ELP → SAT Jul 11, 04:30 UTCJul 11, 05:37 UTC1h 7m
2026-07-11 SWA1822 - Jul 11, 02:30 UTCJul 11, 03:20 UTC50m
2026-07-10 SWA2254 - Jul 10, 23:40 UTCJul 11, 01:35 UTC1h 55m
2026-07-10 SWA4129 DAL → PHX Jul 10, 20:35 UTCJul 10, 22:31 UTC1h 56m
2026-07-10 SWA4129 - Jul 10, 20:35 UTCJul 10, 22:30 UTC1h 55m
2026-07-10 SWA2757 - Jul 10, 17:35 UTCJul 10, 19:30 UTC1h 55m
2026-07-10 SWA2270 LAS → MDW Jul 10, 13:30 UTCJul 10, 16:25 UTC2h 55m
2026-07-10 SWA1195 - Jul 10, 07:25 UTCJul 10, 08:20 UTC55m
2026-07-10 SWA1195 DEN → TUS Jul 10, 02:50 UTCJul 10, 04:25 UTC1h 35m
2026-07-09 SWA1382 LAS → DEN Jul 9, 23:40 UTCJul 10, 01:05 UTC1h 25m
2026-07-09 SWA1382 LAS → DEN Jul 9, 23:38 UTCJul 10, 01:02 UTC1h 24m
2026-07-09 SWA1382 PHX → LAS Jul 9, 20:30 UTCJul 9, 21:15 UTC45m
2026-07-09 SWA1382 DAL → PHX Jul 9, 17:35 UTCJul 9, 19:25 UTC1h 50m
2026-07-09 SWA3254 - Jul 9, 14:40 UTCJul 9, 16:35 UTC1h 55m
2026-07-09 SWA3254 PHX → DAL Jul 9, 14:37 UTCJul 9, 16:35 UTC1h 58m
2026-07-09 SWA864 - Jul 9, 12:25 UTCJul 9, 13:15 UTC50m
2026-07-09 SWA3313 - Jul 9, 06:40 UTCJul 9, 07:30 UTC50m
2026-07-09 SWA489 - Jul 9, 03:40 UTCJul 9, 05:35 UTC1h 55m
2026-07-09 SWA489 DAL → PHX Jul 9, 03:36 UTCJul 9, 05:35 UTC2h 0m
2026-07-09 SWA489 BNA → DAL Jul 9, 00:50 UTCJul 9, 02:35 UTC1h 45m

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 N8970Q page for operator, model, and routing details .

Mode-S AC61BC frequently asked

What is Mode-S code AC61BC?
AC61BC is an ICAO 24-bit transponder address. Allocated to United States. Assigned to N8970Q.
Where is Mode-S AC61BC registered?
Mode-S code AC61BC 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 AC61BC 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 AC61BC, octal 53060674, decimal 11,297,212.
What flights does AC61BC operate?
Mode-S AC61BC has broadcast 20 distinct callsigns, including SWA4470, SWA4139, SWA873, SWA759, SWA2940.