🕒 FCC license data updated yesterday 9:45 am CDT · next update today 7:15 am CDT
Ask: HAMs within 5 miles of N9TPB · Extra class operators in Madison, WI · or try N9TPB · K9* wildcards · Smith, John · 0004797601 (FRN) · 53703 · Madison, WI
Heindrick Yu
FRN 0025176744 · first licensed Jan 5, 2016 as KK6ZSB · 3 licenses on record
📝 FCC applications (10)
Received File number Service Purpose Status Call
Feb 6, 2026 0011898884
HAM Renewal Granted
AA1HY Aug 6, 2025 0011680737
HAM Administrative update Granted
AA1HY Jul 18, 2019 0008730670
HAM Modification Dismissed
AA1HY Jun 12, 2019 0008690086
HAM Modification Dismissed
AA1HY Feb 8, 2016 0007130748
HAM Modification Granted
AI6NP Feb 8, 2016 0007130482
HAM Modification Granted
KK6ZSB Jan 15, 2016 0007097805
HAM Administrative update Granted
KK6ZSB Jan 15, 2016 0007097687
HAM Modification Granted
KK6ZSB Jan 11, 2016 0007091552
HAM Administrative update Granted
KK6ZSB Jan 5, 2016 0007083367
HAM New license Granted
KK6ZSB
Complete licensing history
AA1HY
Active
Amateur Extra · vanity
Feb 26, 2016 → expires Feb 26, 2036
Licensee Heindrick Yu
Address PO Box 50104 Irvine, CA 92619
FRN 0025176744
Previous call AI6NP (General)
Last granted Feb 10, 2026
Effective Feb 10, 2026
Last action Feb 10, 2026
FCC actions (4)
Feb 10, 2026 — License renewed LIREN Aug 7, 2025 — Administrative update LIAUA Feb 26, 2016 — Vanity call sign granted VANGRT Feb 26, 2016 — License issued LIISS
AI6NP
Canceled
Amateur Extra
Jan 5, 2016 → Feb 26, 2016 (canceled)
Licensee Heindrick Yu
Address PO Box 50104 Irvine, CA 92619
FRN 0025176744
Previous call KK6ZSB (General)
Last granted Jan 5, 2016
Effective Feb 8, 2016
Last action Feb 26, 2016
FCC actions (3)
Feb 26, 2016 — License canceled LICAN Feb 8, 2016 — Systematic call sign granted SYSGRT Feb 8, 2016 — License issued LIISS
KK6ZSB
Canceled
Amateur Extra
Jan 5, 2016 → Feb 8, 2016 (canceled)
Licensee Heindrick Yu
Address PO Box 50104 Irvine, CA 92619
FRN 0025176744
Last granted Jan 5, 2016
Effective Feb 8, 2016
Last action Feb 8, 2016
FCC actions (6)
Feb 8, 2016 — License canceled LICAN Jan 16, 2016 — Administrative update LIAUA Jan 15, 2016 — License modified LIMOD Jan 12, 2016 — Administrative update LIAUA Jan 5, 2016 — License issued LIISS Jan 5, 2016 — Systematic call sign granted SYSGRT
Address history
From FCC database snapshots (2004 → now). "Seen" dates are the first and last snapshot showing that address.
Seen Feb 16, 2016 → Oct 4, 2026 · 85 snapshots · as KK6ZSB
Heindrick Yu
PO Box 50104, Irvine, CA 92619
Seen Jan 14, 2016 · 1 snapshot · as KK6ZSB
Heindrick Yu
55 Briarglen, Irvine, CA 92614
33.6780, -117.8346 (ZIP center) · Grid
DM13bq · CQ 3 · ITU 6 ·
map ↗
Vanity applications
Filed · Award Applicant Requested (in order) Status
Filed Jul 18, 2019
Award date was Aug 5, 2019
0008730670
AA1HY · Heindrick Yu
· Amateur Extra
Attn: Heindrick Yu · PO Box 50104, Irvine, CA 92619
Dismissed
Filed Jun 12, 2019
Award date was Jun 30, 2019
0008690086
AA1HY · Heindrick Yu
· Amateur Extra
Attn: Heindrick Yu · PO Box 50104 · Irvine, CA 92619
Dismissed
Filed Feb 8, 2016
Granted Feb 10, 2026
0007130748
AI6NP · Heindrick Yu
· Amateur Extra
PO Box 50104, Irvine, CA 92619
Granted
Data: FCC Universal Licensing System (amateur & GMRS), NetLogger and more · site status
n9tpb.com · 73 de N9TPB