What aircraft is N921NN?

N921NN is a Boeing 737-800 (B738).

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

What is the ICAO 24-bit address of N921NN?

ACC31A. The Mode S address is assigned to the airframe by its country of registration and stays the same from flight to flight.

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

N921NN is a Boeing 737-800 operated by American Airlines. It was built by Boeing. One pilot has caught this exact tail in Skydex.

8 Skydex receivers (Kentucky, Georgia, North Carolina) have heard N921NN, 51 sightings since 8 Sep 2026; last on 9 Nov 2026.

sdf-feed68 — 🇺🇸 United States of America · Kentucky · run by @sdf-feed68 — 1 airframe, 22 sightings, last 2026-11-09
BakerC - FiberflyTower — 🇺🇸 United States of America · Georgia · run by @ebc1613 — 1 airframe, 20 sightings, last 2026-11-07
Asheville NC — 🇺🇸 United States of America · North Carolina · run by @parker-redding — 1 airframe, 18 sightings, last 2026-11-07
home — 🇺🇸 United States of America · near Philadelphia · run by @callmerafiki — 1 airframe, 15 sightings, last 2026-11-03
ebc0045_auburn — 🇺🇸 United States of America · Alabama · run by @ebc1613 — 1 airframe, 12 sightings, last 2026-10-31
Hoyt Clagwell — 🇺🇸 United States of America · Florida · run by @k-han — 1 airframe, 12 sightings, last 2026-11-07
BakerC - KACJ — 🇺🇸 United States of America · Georgia · run by @ebc1613 — 1 airframe, 11 sightings, last 2026-11-04
Docking-Bay-94 — 🇺🇸 United States of America · Pennsylvania · run by @pfshady — 1 airframe, 8 sightings, last 2026-11-06