flight Aircraft
N421EF
SCHLEICHER ASK-21
Operated by SOARING SOCIETY OF BOULDER
- Tail number
- N421EF
- Type
- AS21
- Mode-S
- A4FFC0
Not currently tracked · last seen 14h ago
- Flights observed
- 72 showing last 50
- Avg flight time
- 1h 1m
- Typical route
- WBU → WBU
- Last seen
- 14h ago
Last known area
Recent flights last 50
| Date | Route | Takeoff | Landing | Duration |
|---|---|---|---|---|
| 2026-07-13 | WBU → WBU | Jul 13, 16:10 UTC | Jul 13, 16:50 UTC | 40m |
| 2026-07-12 | WBU → WBU | Jul 12, 19:01 UTC | Jul 12, 19:10 UTC | 10m |
| 2026-07-10 | WBU → WBU | Jul 10, 16:55 UTC | Jul 10, 18:05 UTC | 1h 10m |
| 2026-07-09 | WBU → WBU | Jul 9, 16:00 UTC | Jul 9, 17:15 UTC | 1h 15m |
| 2026-07-06 | WBU → WBU | Jul 6, 18:15 UTC | Jul 6, 19:50 UTC | 1h 35m |
| 2026-07-06 | WBU → WBU | Jul 6, 16:15 UTC | Jul 6, 17:00 UTC | 45m |
| 2026-07-05 | WBU → WBU | Jul 5, 18:15 UTC | Jul 5, 20:05 UTC | 1h 50m |
| 2026-07-04 | WBU → WBU | Jul 4, 17:05 UTC | Jul 4, 19:15 UTC | 2h 10m |
| 2026-07-01 | WBU → WBU | Jul 1, 18:05 UTC | Jul 1, 19:25 UTC | 1h 20m |
| 2026-07-01 | WBU → WBU | Jul 1, 17:00 UTC | Jul 1, 17:10 UTC | 10m |
| 2026-07-01 | WBU → WBU | Jul 1, 15:35 UTC | Jul 1, 15:50 UTC | 15m |
| 2026-06-30 | WBU → WBU | Jun 30, 18:00 UTC | Jun 30, 20:25 UTC | 2h 25m |
| 2026-06-28 | WBU → WBU | Jun 28, 20:29 UTC | Jun 28, 20:45 UTC | 15m |
| 2026-06-26 | WBU → WBU | Jun 26, 18:44 UTC | Jun 26, 19:09 UTC | 25m |
| 2026-06-20 | WBU → WBU | Jun 20, 17:34 UTC | Jun 20, 17:59 UTC | 25m |
| 2026-06-18 | WBU → WBU | Jun 18, 15:35 UTC | Jun 18, 16:00 UTC | 25m |
| 2026-06-17 | WBU → WBU | Jun 17, 16:40 UTC | Jun 17, 18:10 UTC | 1h 30m |
| 2026-06-16 | WBU → WBU | Jun 16, 18:45 UTC | Jun 16, 19:10 UTC | 25m |
| 2026-06-16 | WBU → WBU | Jun 16, 15:50 UTC | Jun 16, 17:59 UTC | 2h 10m |
| 2026-06-15 | WBU → WBU | Jun 15, 19:05 UTC | Jun 15, 20:00 UTC | 55m |
| 2026-06-12 | WBU → WBU | Jun 12, 15:15 UTC | Jun 12, 16:05 UTC | 50m |
| 2026-06-11 | - | Jun 11, 15:35 UTC | Jun 11, 17:05 UTC | 1h 30m |
| 2026-06-09 | WBU → WBU | Jun 9, 16:45 UTC | Jun 9, 17:15 UTC | 30m |
| 2026-06-09 | WBU → WBU | Jun 9, 15:05 UTC | Jun 9, 15:50 UTC | 45m |
| 2026-06-06 | WBU → WBU | Jun 6, 15:34 UTC | Jun 6, 16:10 UTC | 35m |
| 2026-06-05 | WBU → WBU | Jun 5, 19:50 UTC | Jun 5, 20:35 UTC | 45m |
| 2026-06-05 | WBU → WBU | Jun 5, 17:25 UTC | Jun 5, 17:55 UTC | 30m |
| 2026-06-05 | WBU → WBU | Jun 5, 16:05 UTC | Jun 5, 16:50 UTC | 45m |
| 2026-06-04 | WBU → WBU | Jun 4, 19:30 UTC | Jun 4, 20:00 UTC | 30m |
| 2026-06-03 | WBU → WBU | Jun 3, 18:30 UTC | Jun 3, 20:05 UTC | 1h 35m |
| 2026-06-03 | WBU → WBU | Jun 3, 16:10 UTC | Jun 3, 17:35 UTC | 1h 25m |
| 2026-05-30 | WBU → WBU | May 30, 17:20 UTC | May 30, 18:10 UTC | 50m |
| 2026-05-30 | WBU → WBU | May 30, 16:05 UTC | May 30, 16:35 UTC | 30m |
| 2026-05-29 | WBU → WBU | May 29, 17:05 UTC | May 29, 18:30 UTC | 1h 25m |
| 2026-05-27 | WBU → WBU | May 27, 17:10 UTC | May 27, 19:20 UTC | 2h 10m |
| 2026-05-26 | WBU → WBU | May 26, 16:30 UTC | May 26, 18:10 UTC | 1h 40m |
| 2026-05-25 | WBU → WBU | May 25, 15:20 UTC | May 25, 15:35 UTC | 15m |
| 2026-05-24 | WBU → WBU | May 24, 16:10 UTC | May 24, 17:00 UTC | 50m |
| 2026-05-23 | WBU → WBU | May 23, 16:25 UTC | May 23, 18:05 UTC | 1h 40m |
| 2026-05-22 | WBU → WBU | May 22, 15:55 UTC | May 22, 17:50 UTC | 1h 55m |
| 2026-05-21 | - | May 21, 17:10 UTC | May 21, 18:40 UTC | 1h 30m |
| 2026-05-20 | WBU → WBU | May 20, 15:45 UTC | May 20, 16:10 UTC | 25m |
| 2026-05-16 | WBU → WBU | May 16, 18:35 UTC | May 16, 19:35 UTC | 1h 0m |
| 2026-05-16 | WBU → WBU | May 16, 15:40 UTC | May 16, 15:55 UTC | 15m |
| 2026-05-15 | - | May 15, 17:30 UTC | May 15, 18:55 UTC | 1h 25m |
| 2026-05-15 | WBU → WBU | May 15, 15:45 UTC | May 15, 16:10 UTC | 25m |
| 2026-05-14 | - | May 14, 17:40 UTC | May 14, 18:25 UTC | 45m |
| 2026-05-14 | WBU → WBU | May 14, 16:15 UTC | May 14, 17:05 UTC | 50m |
| 2026-05-12 | - | May 12, 18:05 UTC | May 12, 20:30 UTC | 2h 25m |
| 2026-05-12 | WBU → WBU | May 12, 15:40 UTC | May 12, 16:20 UTC | 40m |
Specifications
| Registration | N421EF |
| Aircraft type | SCHLEICHER ASK-21 (AS21) |
| Operator | SOARING SOCIETY OF BOULDER |
| Mode-S code | A4FFC0 · 51177700 (octal) |
Looking for transponder-level data? View the Mode-S A4FFC0 page for country allocation, callsign history, and ADS-B signal details.
N421EF frequently asked
What type of aircraft is N421EF?
N421EF is a SCHLEICHER ASK-21 (ICAO type code AS21).
Who operates N421EF?
N421EF is operated by SOARING SOCIETY OF BOULDER.
What is the Mode-S transponder code for N421EF?
N421EF broadcasts on Mode-S (ICAO 24-bit) address A4FFC0 (octal 51177700). View the transponder page.
What route does N421EF typically fly?
N421EF most frequently flies between WBU and WBU based on observed flights.
Where is N421EF right now?
N421EF is not currently being tracked; last seen 14h ago.