N37521
Built 2019 · registered US
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Performance specs
- Range
- 3,500 nm
- Cruise speed
- 460 kt
- Max speed
- 525 kt
- Service ceiling
- 41,000 ft
- Takeoff distance
- 2900 m
- Landing distance
- 2400 m
- MTOW
- 88,300 kg
- Empty weight
- —
- Fuel capacity
- 26,000 L
- Length
- 42.1 m
- Wingspan
- 35.9 m
- Height
- 12.6 m
- Seats
- 220
- Max passengers
- 220
Flight activity
(342 tracking legs recorded)- Last 30 days
- 90
- Last 90 days
- 325
- Last seen
- 13 Nov 2026
- Tracked since
- 18 Jul 2026
Frequent routes: KEWR → KEWR (7) · KEWR → KPHX (3) · KIAD → KEWR (3)
- KORD → …13 Nov 2026 · 2h 59m
- … → KORD12 Nov 2026 · 6h 43m
- KORD → KORD12 Nov 2026 · 5h 52m
- KLAX → KORD12 Nov 2026 · 3h 47m
- … → KLAX11 Nov 2026 · 3h 41m
- … → KORD11 Nov 2026 · 6h 26m
- … → KORD11 Nov 2026 · 3h 00m
- … → KLAS10 Nov 2026 · 3h 42m
- … → KORD10 Nov 2026 · 3h 14m
- … → KORD10 Nov 2026 · 3h 07m
Showing the 10 most recent distinct flights. The total counts every raw ADS-B tracking leg, including repeat observations and sub-5-minute artifacts.
From ADS-B observations collected since May 2026. Coverage depends on ground-receiver density; gaps do not mean the aircraft did not fly.
Common. One of the most common aircraft types we track.
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Registration history
(1)- N37521USACTIVEWILMINGTON TRUST CO TRUSTEE2020 – present
Owner names are published by the issuing civil registry (FAA / CCARCS / CASA / ANAC / NZ CAA). Owner addresses present in the source are not republished here. Registered owner? Request removal
Operator history
(1)- United AirlinesOperator2026 – present
What aircraft model is N37521?
N37521 is a Boeing 737, built in 2019. Sprinkle's record for N37521 covers its lineage, ownership history and specifications.
Is N37521 currently active?
Registry records list N37521's status as Active, registered in United States — a Boeing 737.
What is the manufacturer serial number (MSN) of N37521?
N37521 carries manufacturer serial number (MSN) 64497, the serial assigned to this Boeing 737 airframe when it was built.
What is the ICAO24 / Mode S code for N37521?
N37521's ICAO24 (Mode S) transponder code is A44916 — the hex address the Mode S transponder on this Boeing 737 broadcasts.