flight Aircraft

N621SM

N621SM is operated by SIERRA MIKE LLC .

N621SM broadcasts on Mode-S (ICAO 24-bit) address A81B90 (octal 52015620 ). View the transponder page .

Operated by SIERRA MIKE LLC

Not currently tracked · last seen Jul 25, 16:20 UTC

Last known area

Map centered near N621SM's most recent activity.

Date	Route	Takeoff	Landing	Duration
2026-07-25	-	Jul 25, 16:00 UTC	Jul 25, 16:20 UTC	20m
2026-07-25	-	Jul 25, 14:15 UTC	Jul 25, 15:15 UTC	1h 0m
2026-07-15	-	Jul 15, 16:45 UTC	Jul 15, 17:35 UTC	50m
2026-07-15	-	Jul 15, 13:20 UTC	Jul 15, 14:10 UTC	50m
2026-07-12	-	Jul 12, 14:15 UTC	Jul 12, 14:40 UTC	25m
2026-07-01	-	Jul 1, 14:05 UTC	Jul 1, 15:10 UTC	1h 5m
2026-05-29	-	May 29, 20:05 UTC	May 29, 20:20 UTC	15m
2026-05-29	-	May 29, 16:05 UTC	May 29, 16:25 UTC	20m
2026-05-21	-	May 21, 15:35 UTC	May 21, 18:30 UTC	2h 55m
2026-05-21	-	May 21, 12:05 UTC	May 21, 14:50 UTC	2h 45m
2026-05-16	-	May 16, 12:31 UTC	May 16, 12:55 UTC	25m
2026-05-08	-	May 8, 14:40 UTC	May 8, 17:25 UTC	2h 45m
2026-05-08	-	May 8, 10:39 UTC	May 8, 13:35 UTC	2h 55m
2026-05-07	-	May 7, 19:15 UTC	May 7, 20:25 UTC	1h 10m
2026-05-07	-	May 7, 17:25 UTC	May 7, 18:20 UTC	55m
2026-05-05	-	May 5, 18:00 UTC	May 5, 18:15 UTC	15m
2026-05-05	-	May 5, 14:40 UTC	May 5, 15:15 UTC	35m
2026-04-23	-	Apr 23, 20:35 UTC	Apr 23, 20:50 UTC	15m
2026-04-12	-	Apr 12, 17:15 UTC	Apr 12, 19:50 UTC	2h 35m

Looking for transponder-level data? View the Mode-S A81B90 page for country allocation, callsign history, and ADS-B signal details.

Who operates N621SM?

N621SM is operated by SIERRA MIKE LLC.

What is the Mode-S transponder code for N621SM?

N621SM broadcasts on Mode-S (ICAO 24-bit) address A81B90 (octal 52015620). View the transponder page.

Where is N621SM right now?

N621SM is not currently being tracked; last seen Jul 25, 16:20 UTC.