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 Jul 26, 23:00 UTC
Flights observed
797
Distinct callsigns
20
Country
US
Last broadcast
Jul 26, 23:00 UTC

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
SWA4751 - 4 2026-07-18
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
SWA965 Southwest Airlines 3 2026-07-24
SWA776 Southwest Airlines 3 2026-05-22
SWA642 - 3 2026-06-18

Recent flights last 50

DateFlightRouteTakeoffLandingDuration
2026-07-26 SWA4539 DEN → BUF Jul 26, 22:15 UTCJul 26, 23:00 UTC45m
2026-07-26 SWA3755 DEN → DSM Jul 26, 19:45 UTCJul 26, 21:10 UTC1h 25m
2026-07-26 SWA519 STL → LGA Jul 26, 17:00 UTCJul 26, 18:25 UTC1h 25m
2026-07-26 SWA519 STL → LGA Jul 26, 14:55 UTCJul 26, 16:00 UTC1h 5m
2026-07-26 SWA519 STL → LGA Jul 26, 10:15 UTCJul 26, 13:25 UTC3h 10m
2026-07-26 SWA4762 SDF → TPA Jul 26, 03:00 UTCJul 26, 05:20 UTC2h 20m
2026-07-26 SWA4762 SDF → TPA Jul 26, 03:00 UTCJul 26, 05:18 UTC2h 19m
2026-07-25 SWA3238 SNA → OAK Jul 25, 21:05 UTCJul 25, 23:20 UTC2h 15m
2026-07-25 SWA3238 SNA → OAK Jul 25, 21:02 UTCJul 25, 23:18 UTC2h 16m
2026-07-25 SWA3287 DEN → LAS Jul 25, 15:50 UTCJul 25, 18:15 UTC2h 25m
2026-07-25 SWA1348 PHX → BNA Jul 25, 11:23 UTCJul 25, 13:30 UTC2h 7m
2026-07-25 SWA1348 PHX → BNA Jul 25, 11:25 UTCJul 25, 13:00 UTC1h 35m
2026-07-24 SWA965 OAK → PDX Jul 24, 19:00 UTCJul 24, 22:10 UTC3h 10m
2026-07-24 SWA4509 SAN → SJC Jul 24, 16:45 UTCJul 24, 17:40 UTC55m
2026-07-24 SWA4509 - Jul 24, 16:50 UTCJul 24, 17:45 UTC55m
2026-07-24 SWA192 STL → DAL Jul 24, 13:16 UTCJul 24, 15:39 UTC2h 23m
2026-07-24 SWA192 STL → DAL Jul 24, 13:20 UTCJul 24, 15:00 UTC1h 40m
2026-07-24 SWA192 STL → DAL Jul 24, 10:20 UTCJul 24, 12:00 UTC1h 40m
2026-07-24 SWA446 LGB → SJC Jul 24, 00:20 UTCJul 24, 01:00 UTC40m
2026-07-23 SWA4799 DEN → LAX Jul 23, 20:50 UTCJul 23, 22:35 UTC1h 45m
2026-07-23 SWA4799 DEN → LAX Jul 23, 20:45 UTCJul 23, 22:31 UTC1h 46m
2026-07-23 SWA1361 AUS → ONT Jul 23, 17:05 UTCJul 23, 19:35 UTC2h 30m
2026-07-23 SWA1361 AUS → ONT Jul 23, 17:04 UTCJul 23, 19:36 UTC2h 33m
2026-07-23 SWA1361 AUS → ONT Jul 23, 13:20 UTCJul 23, 15:50 UTC2h 30m
2026-07-23 SWA983 SJC → DEN Jul 23, 05:50 UTCJul 23, 06:35 UTC45m
2026-07-23 SWA4517 HOU → LGA Jul 23, 01:25 UTCJul 23, 03:50 UTC2h 25m
2026-07-23 SWA4517 HOU → LGA Jul 23, 01:25 UTCJul 23, 03:49 UTC2h 25m
2026-07-22 SWA4489 SAN → BWI Jul 22, 21:25 UTCJul 22, 23:45 UTC2h 20m
2026-07-22 SWA1771 SEA → SJC Jul 22, 17:25 UTCJul 22, 20:05 UTC2h 40m
2026-07-22 SWA1771 SEA → SJC Jul 22, 15:35 UTCJul 22, 16:25 UTC50m
2026-07-22 SWA163 PHX → SJC Jul 22, 12:40 UTCJul 22, 14:35 UTC1h 55m
2026-07-22 SWA163 PHX → SJC Jul 22, 12:39 UTCJul 22, 14:27 UTC1h 48m
2026-07-21 SWA159 SLC → DEN Jul 21, 17:40 UTCJul 21, 20:40 UTC3h 0m
2026-07-21 SWA1080 IND → RSW Jul 21, 12:55 UTCJul 21, 16:20 UTC3h 25m
2026-07-21 SWA1080 IND → RSW Jul 21, 12:50 UTCJul 21, 16:16 UTC3h 26m
2026-07-21 SWA420 BOS → STL Jul 21, 10:10 UTCJul 21, 11:10 UTC1h 0m
2026-07-21 SWA420 BOS → STL Jul 21, 10:04 UTCJul 21, 11:09 UTC1h 5m
2026-07-21 SWA1879 - Jul 21, 03:45 UTCJul 21, 04:30 UTC45m
2026-07-21 SWA1879 BWI → BDL Jul 21, 03:42 UTCJul 21, 04:29 UTC47m
2026-07-21 SWA189 MDW → CVG Jul 21, 00:25 UTCJul 21, 01:55 UTC1h 30m
2026-07-20 SWA3556 DEN → IAH Jul 20, 21:00 UTCJul 20, 23:00 UTC2h 0m
2026-07-20 SWA2333 - Jul 20, 17:45 UTCJul 20, 20:00 UTC2h 15m
2026-07-20 SWA2333 LAS → SAT Jul 20, 17:41 UTCJul 20, 19:59 UTC2h 18m
2026-07-20 SWA2333 - Jul 20, 15:45 UTCJul 20, 16:30 UTC45m
2026-07-20 SWA4879 MCI → MIA Jul 20, 13:45 UTCJul 20, 14:50 UTC1h 5m
2026-07-20 SWA4879 MCI → MIA Jul 20, 13:45 UTCJul 20, 14:38 UTC53m
2026-07-20 SWA4936 LAX → OAK Jul 20, 04:40 UTCJul 20, 05:30 UTC50m
2026-07-20 SWA901 - Jul 20, 01:05 UTCJul 20, 03:40 UTC2h 35m
2026-07-19 SWA1784 - Jul 19, 21:05 UTCJul 19, 22:40 UTC1h 35m
2026-07-19 SWA1784 ECP → AUS Jul 19, 21:03 UTCJul 19, 22:38 UTC1h 35m

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 Jul 26, 23:00 UTC.
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, SWA4751.