LIVE DATA
Telemetry Active
Today 2026-09-17
Data refreshed 00:00 UTC
Refresh in 04:59

N37521

Type: Boeing 737 MAX 9 (B39M) Mode S Hex: A44916 Operator: United Airlines Status: ACTIVE

Airframe N37521 Key Facts

  • Airframe N37521 (Boeing 737 MAX 9) 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 A44916 with manufacturer serial number (MSN) 64497.
N37521 (Boeing 737 MAX 9)
Boeing 737 MAX 9 · Operated by United Airlines Reference: MHernandezp05
Aviation Spotter Galleries for Tail N37521:
Planespotters.net → JetPhotos → FlightRadar24 Telemetry →

Registry Record

Registration Mark
N37521
Manufacturer Serial Number (MSN)
64497
Mode S 24-bit ICAO Hex
a44916
Registered Owner
Wilmington Trust Co Trustee
Lessor / Financing
AerCap
Estimated Airframe Age
6.4 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 64497 • Hex A44916
2020 OEM Production
Assembled by Boeing
Manufactured as Boeing 737 MAX 9 with Manufacturer Serial Number 64497 and assigned ICAO Mode S hex A44916.
2020 Commercial Entry
Delivered into Commercial Service
Accepted into commercial scheduled operations under tail registration N37521.
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 6.4 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