| Callsign | KP4AO |
| Radio Service | HV - Vanity |
| License Status | A - Active |
| Grant Date | 2017-02-08 |
| Effective Date | 2023-11-22 |
| Expire Date | 2027-02-28 |
| Cancel Date | |
| Last Action Date | 2024-03-13 |
| End Date | 2027-02-28 |
| Available Date | 2029-03-01 |
| Applicant Type | B - Amateur Club |
| Entity Name | ARECIBO OBSERVATORY RADIO CLUB |
| Street Address / Locality | HC 3 Box 20883 Arecibo, PR 00612 |
| County | Arecibo Municipio |
| Zip Location | 18°24'08.1"N 66°42'41.0"W |
| Maidenhead | FK68pj |
| FRN | 0006413306 |
| Licensee ID/SGIN | L00151065 / 000 |
| Licensee Class | |
| Callsign Group | C - 2x2 |
| ULS/Geo Region | 12 / 12 / PR |
| Prev Callsign / Prev Class | WP4NIP |
| Next Callsign | |
| Trustee Callsign / Trustee Name | WP3R VAZQUEZ JR, ANGEL M |
| Vanity Type | |
| ULS File Number | 0010787857 |
| Phonetic weight / Morse weight | 10 / 62 |