1 Feb
N421EF
LANDED
17:08
Boulder, CO (WBU)
N/A
GLID
Departed
17:08
1 week ago
N421EF
N421EF
LANDED
Last seen near
Boulder, CO, United States
Sunday, February 1 2026
10:08 MST
Departed
Sunday, February 1 2026
N/A
Position Info
Latitude
-
Longitude
-
Altitude
-
Ground Speed
Wind
Air Temperature
Vertical Speed
Heading
-
Squawk
-
Source
-
Station
-
FIR
Aircraft Info
Aircraft Model
Registration
Mode-S
Serial Number
21905
Aircraft Age
Owner
Last Activity
13 hours ago
Last Known Location
Boulder, CO, United States
Aircraft Type
Nr. Engines
Nr. Seats
Weight Class
Cruising Speed
Engine
Engine Type
Aircraft Category
Registrant Type
Airworthiness Class
Operation Types
Certificate Issue Date
Registration Status
Flight Activity
  • 14 Feb
    N421EF
    STATUS N/A
    N421EF (GLID)
  • 14 Feb
    N421EF
    DEPARTED 16h 24m AGO
    16:52
    Boulder, CO (WBU)
    N/A
    N421EF (GLID)
    Departed
    16:52
    16 hours ago
  • 13 Feb
    N421EF
    LANDED
    18:05
    Boulder, CO (WBU)
    N/A
    N421EF (GLID)
    Departed
    18:05
    2 days ago
  • 13 Feb
    N421EF
    LANDED
    16:32
    Boulder, CO (WBU)
    N/A
    N421EF (GLID)
    Departed
    16:32
    2 days ago
  • 12 Feb
    N421EF
    LANDED
    N421EF (GLID)
  • 12 Feb
    N421EF
    LANDED
    N421EF (GLID)
  • 11 Feb
    N421EF
    LANDED
    N421EF (GLID)
  • 11 Feb
    N421EF
    LANDED
    N421EF (GLID)
  • 10 Feb
    N421EF
    LANDED
    N421EF (GLID)
  • 9 Feb
    N421EF
    LANDED
    N421EF (GLID)
  • 9 Feb
    N421EF
    LANDED
    N421EF (GLID)
  • 8 Feb
    N421EF
    LANDED
    22:30
    Boulder, CO (WBU)
    N/A
    N421EF (GLID)
    Departed
    22:30
    6 days ago
  • 8 Feb
    N421EF
    LANDED
    N421EF (GLID)
  • 1 Feb
    N421EF
    LANDED
    17:08
    Boulder, CO (WBU)
    N/A
    N421EF (GLID)
    Departed
    17:08
    1 week ago
DateFlightOriginSTDATDDestinationSTADelayStatusDurationReplay
2026 Feb 14
N421EF
First seen near
Boulder, CO, United States
Status N/A
2026 Feb 14
N421EF
Boulder, CO (WBU/KBDU)
09:52 MST
Departed
2026 Feb 13
N421EF
Boulder, CO (WBU/KBDU)
11:05 MST
Last seen near
Boulder, CO, United States
Landed
2026 Feb 13
N421EF
Boulder, CO (WBU/KBDU)
09:32 MST
Last seen near
Boulder, CO, United States
Landed
2026 Feb 12
N421EF
First seen near
Boulder, CO, United States		Last seen near
Boulder, CO, United States
Landed
2026 Feb 12
N421EF
First seen near
Boulder, CO, United States		Last seen near
Boulder, CO, United States
Landed
2026 Feb 11
N421EF
First seen near
Boulder, CO, United States		Last seen near
Boulder, CO, United States
Landed
2026 Feb 11
N421EF
First seen near
Boulder, CO, United States		Last seen near
Boulder, CO, United States
Landed
2026 Feb 10
N421EF
First seen near
Boulder, CO, United States		Last seen near
Boulder, CO, United States
Landed
2026 Feb 9
N421EF
First seen near
Boulder, CO, United States		Last seen near
Boulder, CO, United States
Landed
2026 Feb 9
N421EF
First seen near
Boulder, CO, United States		Last seen near
Boulder, CO, United States
Landed
2026 Feb 8
N421EF
Boulder, CO (WBU/KBDU)
15:30 MST
Last seen near
Boulder, CO, United States
Landed
2026 Feb 8
N421EF
First seen near
Boulder, CO, United States		Last seen near
Boulder, CO, United States
Landed
2026 Feb 1
N421EF
Boulder, CO (WBU/KBDU)
10:08 MST
Last seen near
Boulder, CO, United States
Landed

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