🕒 FCC license data updated today 9:42 am CDT (FCC files through Sep 30, 2026) · next update tomorrow 9:15 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
KP4OD
⏳
Not available yet — opens for vanity requests
Apr 18, 2028 , two years after the license was canceled (Apr 17, 2026).
2x2 call: Advanced and Amateur Extra licensees can request it.
No pending applications list it.
📬 QSL:
LoTW user , last upload Apr 25, 2026
· eQSL AG member
Not currently held
· 2 holders on record
Previous holder: Delmer O Walker-Guzman
Held KP4OD Apr 26, 2019 → Apr 17, 2026
· first licensed Aug 3, 2004 as WP4DM
· 4 licenses · FRN 0011332509
KP4DW
Active
Amateur Extra · vanity
Apr 17, 2026 → expires Apr 17, 2036
Licensee Delmer O Walker-Guzman
Address COND CAROLINA COURT 1 CALLE INFANTE APT 5 CAROLINA, PR 00982-3502
18.4087, -65.9913 (ZIP center) · Grid
FK78aj · CQ 8 · ITU 11 ·
map ↗
FRN 0011332509
Previous call KP4OD (General)
Last granted Apr 17, 2026
Effective Apr 17, 2026
Last action Apr 17, 2026
FCC actions (2)
Apr 17, 2026 — Vanity call sign granted VANGRT Apr 17, 2026 — License issued LIISS
KP4OD
Canceled
Amateur Extra · vanity
Apr 26, 2019 → Apr 17, 2026 (canceled)
Licensee Delmer O Walker-Guzman
Address COND CAROLINA COURT 1 CALLE INFANTE APT 5 CAROLINA, PR 00982-3502
18.4087, -65.9913 (ZIP center) · Grid
FK78aj · CQ 8 · ITU 11 ·
map ↗
FRN 0011332509
Previous call KP4OMI (General)
Last granted Apr 26, 2019
Effective Jun 13, 2020
Last action Apr 17, 2026
FCC actions (4)
Apr 17, 2026 — License canceled LICAN Jun 13, 2020 — FCC action LIAUA Apr 26, 2019 — Vanity call sign granted VANGRT Apr 26, 2019 — License issued LIISS
KP4OMI
Canceled
Amateur Extra · vanity
Feb 26, 2019 → Apr 26, 2019 (canceled)
Licensee Delmer O Walker-Guzman
Address COND CAROLINA COURT APTS A-5 CALLE INFANTE CAROLINA, PR 00982
18.4087, -65.9913 (ZIP center) · Grid
FK78aj · CQ 8 · ITU 11 ·
map ↗
FRN 0011332509
Previous call WP4DM (General)
Last granted Feb 26, 2019
Effective Apr 10, 2019
Last action Apr 26, 2019
FCC actions (4)
Apr 26, 2019 — License canceled LICAN Apr 10, 2019 — License modified LIMOD Feb 26, 2019 — Vanity call sign granted VANGRT Feb 26, 2019 — License issued LIISS
WP4DM
Canceled
General
Aug 3, 2004 → Feb 26, 2019 (canceled)
Licensee Delmer O Walker-Guzman
Address Cond Carolina Ct A-5 Calle Infante Carolina, PR 00982
18.4087, -65.9913 (ZIP center) · Grid
FK78aj · CQ 8 · ITU 11 ·
map ↗
FRN 0011332509
Last granted Dec 18, 2014
Effective Feb 6, 2019
Last action Feb 26, 2019
FCC actions (4)
Feb 26, 2019 — License canceled LICAN Feb 6, 2019 — License modified LIMOD Dec 18, 2014 — License renewed LIREN Aug 3, 2004 — License issued LIISS
Address history
From FCC database snapshots (2004 → now). "Seen" dates are the first and last snapshot showing that address.
Seen Apr 16, 2022 → Sep 27, 2026 · 13 snapshots · as KP4OD
Delmer O Walker-Guzman
COND CAROLINA COURT 1 CALLE INFANTE APT 5, CAROLINA, PR 00982-3502
18.4087, -65.9913 (ZIP center) · Grid
FK78aj · CQ 8 · ITU 11 ·
map ↗
Seen May 6, 2019 → Sep 27, 2026 · 13 snapshots · as KP4OMI
Delmer O Walker-Guzman
COND CAROLINA COURT APTS A-5 CALLE INFANTE, CAROLINA, PR 00982
18.4087, -65.9913 (ZIP center) · Grid
FK78aj · CQ 8 · ITU 11 ·
map ↗
Seen May 6, 2019 → Sep 27, 2026 · 13 snapshots · as WP4DM
Delmer O Walker-Guzman
Cond Carolina Ct A-5 Calle Infante, Carolina, PR 00982
18.4087, -65.9913 (ZIP center) · Grid
FK78aj · CQ 8 · ITU 11 ·
map ↗
Seen May 6, 2019 · 1 snapshot · as KP4OD
Delmer O Walker-Guzman
COND CAROLINA COURT APTS A-5 INFANTE ST, CAROLINA, PR 00982
18.4087, -65.9913 (ZIP center) · Grid
FK78aj · CQ 8 · ITU 11 ·
map ↗
Seen Mar 28, 2015 → Jan 22, 2019 · 22 snapshots · as WP4DM
Delmer O Walker-Guzman
COND CAROLINA COURT APTS APT A-5 INFANTE ST, Carolina, PR 00982
18.4087, -65.9913 (ZIP center) · Grid
FK78aj · CQ 8 · ITU 11 ·
map ↗
Seen Nov 7, 2004 → May 22, 2014 · 12 snapshots · as WP4DM
Delmer O Walker-Guzman
Carolina Cts Apts Apt A-5, Carolina, PR 00982
18.4087, -65.9913 (ZIP center) · Grid
FK78aj · CQ 8 · ITU 11 ·
map ↗
Previous holder: CARLOS RIVERA
Held KP4OD Oct 20, 1997 → Oct 20, 2007
· first licensed Oct 20, 1997 as KP4OD
· 1 license · no FRN on file (pre-2001 records)
KP4OD
Expired
Advanced
Oct 20, 1997 → Oct 20, 2007 (expired)
Licensee CARLOS RIVERA
Address BOX 7108 MAYAGUEZ, PR 00681
Last granted Oct 20, 1997
Effective Oct 20, 1997
Last action Oct 21, 2009
FCC actions (1)
Oct 21, 2009 — License expired LIEXP
Address history
From FCC database snapshots (2004 → now). "Seen" dates are the first and last snapshot showing that address.
Seen Nov 7, 2004 → Sep 27, 2026 · 47 snapshots · as KP4OD
CARLOS RIVERA
BOX 7108, MAYAGUEZ, PR 00681
Others requesting KP4OD
2 applications listed KP4OD as a choice, newest first.
Data: FCC Universal Licensing System, amateur service · refreshed nightly
n9tpb.com · 73 de N9TPB