Airframe N2251U Key Facts

  • Airframe N2251U (Boeing 777-300ER) was last observed on 2026-09-17 at monitored terminal (Global Airspace).
  • Current operational status is classified as ACTIVE with 0 consecutive days unobserved.
  • Registered Mode S 24-bit transponder address is A1F622 with manufacturer serial number (MSN) 66591.
N2251U (Boeing 777-300ER)
Boeing 777-300ER · Operated by United Airlines Reference: Юрий Д.К.

Registry Record

Registration Mark
N2251U
Manufacturer Serial Number (MSN)
66591
Mode S 24-bit ICAO Hex
a1f622
Registered Owner
United Airlines Inc
Lessor / Financing
AerCap
Estimated Airframe Age
6.0 years
Resolution Confidence
HIGH

Observation & Telemetry State

Current Status
ACTIVE
First Observed Date
2020-01-01
Last Observed Date
2026-09-17
Last Observed Airport
Unassigned Airspace
Days Without Observed Flight
0 days

Airframe Lifecycle & Genealogy History

MSN 66591 • Hex A1F622
2020 OEM Production
Assembled by Boeing
Manufactured as Boeing 777-300ER with Manufacturer Serial Number 66591 and assigned ICAO Mode S hex A1F622.
2020 Commercial Entry
Delivered into Commercial Service
Accepted into commercial scheduled operations under tail registration N2251U.
2023 Asset Financing
Financed by AerCap
Placed under operating lease portfolio with long-term placement agreement and institutional asset management.
2026 (Current) ACTIVE
Operated by United Airlines
Current observed airframe age is 6.0 years. Telemetry active across global ADS-B tracking corridors.

90-Day Observed Activity Strip

Daily flight activity observations over the previous 90-day window.

Observed ADS-B Signal Unobserved / On Ground

Observed Flight Corridor History

CYYZ-KATLKATL-KLAXKLAX-KJFK