N421UP
Built 1991 · registered US
This aircraftFlight activity
(112 tracking legs recorded)- Last 30 days
- 0
- Last 90 days
- 42
- Last seen
- 19 Sept 2026
- Tracked since
- 27 May 2026
Frequent routes: KGEG → KGEG (2) · KGEG → KSAT (2) · KMHR → KDFW (2)
- KABY → KICT19 Sept 2026 · 8h 22m
- KMSP → …17 Sept 2026 · 1h 05m
- KSDF → KMSP17 Sept 2026 · 1h 28m
- KORD → KLBB11 Sept 2026 · 11h 31m
- … → KORD11 Sept 2026 · 9h 10m
- KEWR → KORD11 Sept 2026 · 9h 10m
- KDFW → KEWR10 Sept 2026 · 3h 17m
- KSAT → KDFW10 Sept 2026 · 0h 49m
- KGEG → KSAT9 Sept 2026 · 8h 13m
- KONT → KGEG9 Sept 2026 · 2h 01m
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.
Registration history
(1)- N421UPUSACTIVEUNITED PARCEL SERVICE CO1991 – 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 Parcel ServiceOperator2026 – present
Is N421UP currently active?
Registry records list N421UP's status as Active, registered in United States — a Boeing.
What is the manufacturer serial number (MSN) of N421UP?
N421UP carries manufacturer serial number (MSN) 25281, the serial assigned to this Boeing airframe when it was built.
What is the ICAO24 / Mode S code for N421UP?
N421UP's ICAO24 (Mode S) transponder code is A50126 — the hex address the Mode S transponder on this Boeing broadcasts.