Confidence: Medium · Source: FCC ULS · As of 2026-09-09

AI4PY

Active

Frost, William R

Location: Knoxville, TN
Class: Amateur Extra
Granted: 2016-03-03
Expires: 2026-05-30
Previous call: AH6RC
FRN: 0002987089

Get notified about status changes and vanity availability for this callsign.

Vanity availability

Held

Currently held

AI4PY is held by an active license; it isn't a vanity slot right now.

Vanity availability dates are computed from FCC §97.19's hold periods: 2 years from the cancellation date for cancelled or terminated licenses, 4 years from the expiration date for expired licenses (2-year renewal grace + 2-year hold).

Callsign genealogy

Full chain →

Previously held by current licensee

AH6RCcancelled· E
Stewart, ArchHIgranted 2014-05-28cancelled 2015-04-17
AH7RCcancelled· E
Stewart, ArchHIgranted 2013-04-02cancelled 2014-05-28
W8WHactive· E
Linford, TonyORgranted 2021-04-23

License history

0 events

No recorded events.

More vanity slots coming available

From Tennessee

All →

KG4TWC 2026-09-10
KK4LNE 2026-09-10
KK4LNK 2026-09-10
KQ4TPH 2026-09-10
KQ4UUA 2026-09-10

Starting with AI4

All →

AI4LB FL · 2026-09-18
AI4BO FL · 2026-11-20
AI4QU TN · 2026-11-29
AI4FC MA · 2026-12-16
AI4ES KY · 2026-12-31

Full history → Vanity availability → Callsign genealogy →