What aircraft is N21108?

N21108 is a Boeing 757-200 (B752).

United Airlines, going by the callsign it flew under when it was caught.

What is the ICAO 24-bit address of N21108?

A1BFB2. The Mode S address is assigned to the airframe by its country of registration and stays the same from flight to flight.

On 2026-11-10. Our receivers have heard it on 51 days since 2026-09-08.

N21108 is a Boeing 757-200 operated by United Airlines. It was built by Boeing. One pilot has caught this exact tail in Skydex.

9 Skydex receivers (Pennsylvania, Colorado, Ohio) have heard N21108, 51 sightings since 8 Sep 2026; last on 10 Nov 2026.

Docking-Bay-94 — 🇺🇸 United States of America · Pennsylvania · run by @pfshady — 1 airframe, 25 sightings, last 2026-11-10
KGJT-2 — 🇺🇸 United States of America · Colorado · run by @cable-junction — 1 airframe, 20 sightings, last 2026-11-09
Dexter — 🇺🇸 United States of America · Ohio · run by @nightlonk — 1 airframe, 15 sightings, last 2026-11-10
home — 🇺🇸 United States of America · near Philadelphia · run by @callmerafiki — 1 airframe, 12 sightings, last 2026-11-08
BD — 🇺🇸 United States of America · Indiana · run by @brian-goodzey — 1 airframe, 12 sightings, last 2026-11-10
0Krypt — 🇺🇸 United States of America · near Minneapolis · run by @0krypt — 1 airframe, 10 sightings, last 2026-11-10
DogeRam1500 — 🇺🇸 United States of America · New Jersey · run by @john-napoli — 1 airframe, 10 sightings, last 2026-11-10
Asheville NC — 🇺🇸 United States of America · North Carolina · run by @parker-redding — 1 airframe, 9 sightings, last 2026-10-25
BakerC - FiberflyTower — 🇺🇸 United States of America · Georgia · run by @ebc1613 — 1 airframe, 8 sightings, last 2026-11-08