N9TPB FCC License Search

🕒 FCC license data updated today 7:15 am CDT (FCC files through Oct 28, 2026) · next update tomorrow 6:00 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 · old CB calls like KHC1939 or 18Q3518 (1962–63 CB call books) · (205) 546-1767 (1990s CB directory phones)

W9ZTK HAM

✅ Available for a vanity request — free since Jun 22, 2000.

1x3 call: Technician, General, Advanced and Amateur Extra licensees can request it. No pending applications list it.

📬 QSL: no LoTW uploads on record · not eQSL AG · QRZ · HamQTH

Not currently held · 1 holder on record · available since Jun 22, 2000

Previous holder: CALVIN J SONDGEROTH

Held W9ZTK Jun 21, 1988 → Jun 21, 1998 · first licensed Jun 21, 1988 as W9ZTK · 1 license · no FRN on file (pre-2001 records)
📖 In the printed callbooks since 1954 as W9ZTK, before the FCC's online records

W9ZTK Expired General Jun 21, 1988 → Jun 21, 1998 (expired)

Licensee
CALVIN J SONDGEROTH

Address
800 FIFTH AVE
MENDOTA, IL 61342
41.5437, -89.0841 (ZIP center) · Grid EN51kn · CQ 4 · ITU 8 · map ↗

Last granted
Jun 21, 1988

Effective
Jun 21, 1988

Last action
Jun 22, 2000
FCC actions (1)
- Jun 22, 2000 — License expired LIEXP

Callbook Records, 1993–2003

From the FCC amateur database as published on the QRZ! callsign CD-ROMs, 1993–2003, before and alongside the FCC's online records (which start in 1999). "Seen" dates are the first and last disc showing that record; the issue date is the FCC's, so it can be a renewal of an even older license.

Seen Sep 9, 1993 → May 2, 2000 · 13 discs
W9ZTK · General · issued Jun 21, 1988, expires Jun 21, 1998
CALVIN J. SONDGEROTH
800 FIFTH AVE, MENDOTA, IL 61342

Address history

From FCC database snapshots (2004 → now). "Seen" dates are the first and last snapshot showing that address.

Seen Nov 7, 2004 → Oct 25, 2026 · 51 snapshots · as W9ZTK
CALVIN J SONDGEROTH
800 FIFTH AVE, MENDOTA, IL 61342
41.5437, -89.0841 (ZIP center) · Grid EN51kn · CQ 4 · ITU 8 · map ↗

W9ZTK in the Printed Callbooks, 1909–1997

From scanned copies of the printed callbooks (government lists from 1913, then the Radio Amateur Callbook to 1997), read by OCR, so names and streets can carry typos. Each line is one or more editions in a row showing the same name at the same address.

1988 → 1993 · 3 editions
W9ZTK · class G
Calvin J Sondgeroth
800 51h Avenue, Mendola, IL 61341
Winter 1988 p.1273, Winter 1991 p.1418, Winter 1993 p.1603
1987 · 1 edition
W9ZTK · class G
Calvin J Sondgmth
Boo Fifth Ave, Mendota Il Bl341
Winter 1987 p.1239
1985 → 1986 · 2 editions
W9ZTK · class G
Calvin J Sondgeroth
800 Fifth Ave, Mendota Il Bl341
Winter 1985 p.1222, Winter 1986 p.1220
1984 · 1 edition
W9ZTK · class G
Calvin J Sondgeroth
Boo Fifth Ave, Mendota Il Bll41
Winter 1984 p.2
1974 → 1983 · 8 editions
W9ZTK · class G
Calvin J Sondgeroth
800 5th Av, Mendota
1974 p.595, Winter 1976 p.631, Winter 1977 p.684, Winter 1978 p.947, Winter 1979 p.516, Winter 1980 p.1085, 1981 p.1023, Winter 1983 p.1173
1971 · 2 editions
W9ZTK · class G
Calvin J Sondgeroth
800 Fifth Av, Mndta
Winter 1971 p.1, Fall 1971 p.622
1969 · 1 edition
W9ZTK · class G
Calvin J Sondgeroth
7 1 5 N Elm St, Sandwich
Summer 1969 p.603
1968 · 1 edition
W9ZTK
E ~~~~1~·jj~~~b~er~~~
3 71~e~f~~~ S 1, Sanow~l~ 5 I ·rt
Spring 1968 p.617
1967 · 1 edition
W9ZTK
G ~~~~i~.jj~~~~~er~~~ .
3 11, E2f~~~ St, Sandw1~~ 51
Fall 1967 p.606
1960 → 1961 · 3 editions
W9ZTK
Calvin J. Sondgeroth
Rfd 2, Mendota Ill
Winter 1960 p.544, Spring 1961 p.546, Fall 1961 p.571
1956 · 1 edition
W9ZTK
Calvin J. Sondgeroth
304 Fourth Street, Mendota, IL
Spring 1956 p.366
1955 · 1 edition
W9ZTK
C A L V I N J . S O N D G E R O T H
304 F O U R T H S T R E E T, M E N D O T A, Iii.
Fall 1955 p.370
1954 · 2 editions
W9ZTK
Calvin J. Sondgeroth
304 Fourth Street, Mendota, IL
Spring 1954 p.307, Fall 1954 p.312
None · 1 edition
W9ZTK · class G
Calvin J Sondgeroth
800 5th Av, Mendota
None p.1093
None · 1 edition
W9ZTK · class G
Calvin J Sordsacnth
800 5th Av, Mendota
None p.595

📡 On the Air: APRS, Digital & WSPR Spots

No APRS positions, PSK Reporter reports or WSPR spots for W9ZTK in the last 24 hours. They show up here within seconds of W9ZTK beaconing on APRS, being heard on FT8, FT4 and other digital modes, or sending a WSPR beacon.