NumberResearchRecent prefix assignments
0 prefixes assigned in the last 30 days · from the daily NANPA CO code file, 09/20/2026
The Code holder is who opened each NPA-NXX prefix — not necessarily who holds the numbers. A prefix is 10,000 numbers, but under pooling its ten 1,000-number blocks are handed out individually, often to different carriers; the code holder may hold only one block, or none. The Thousands-blocks column shows how the ten blocks are really split — click which blocks → to see who holds each 1,000-number block and its last-4-digit range. Assignments are initial assignments; the current serving carrier may differ due to portability.
Most active assignees, all time — NPA 787
New assignments by month
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Oct 2025
| Assigned | NPA-NXX | Thousands-blocks taken (last-4 opening) | Code holder | OCN | Rate center | State |
|---|---|---|---|---|---|---|
| — | 787-813 | 6XXX9XXX which blocks → | PUERTO RICO TEL. CO. | 3201 | PONCE | PR |
| — | 787-814 | 7XXX8XXX9XXX · 3 holders which blocks → | PUERTO RICO TEL. CO. | 3201 | UTUADO | PR |
| — | 787-815 | none assigned yet which blocks → | PUERTO RICO TEL. CO. | 3201 | ARECIBO | PR |
| — | 787-816 | not yet reported which blocks → | PUERTO RICO TEL. CO. | 3201 | ARECIBO | PR |
| — | 787-817 | 9XXX which blocks → | PUERTO RICO TEL. CO. | 3201 | ARECIBO | PR |
| — | 787-818 | 7XXX which blocks → | PUERTO RICO TEL. CO. | 3201 | MOCA | PR |
| — | 787-819 | not yet reported which blocks → | PUERTO RICO TEL. CO. | 3201 | RAMEY | PR |
| — | 787-820 | not yet reported which blocks → | PUERTO RICO TEL. CO. | 3201 | CAMUY | PR |
| — | 787-821 | not yet reported which blocks → | PUERTO RICO TEL. CO. | 3201 | GUANICA | PR |
| — | 787-822 | 5XXX6XXX8XXX9XXX · 4 holders which blocks → | PUERTO RICO TEL. CO. | 3201 | FLORIDA | PR |
| — | 787-823 | not yet reported which blocks → | PUERTO RICO TEL. CO. | 3201 | RINCON | PR |
| — | 787-824 | not yet reported which blocks → | PUERTO RICO TEL. CO. | 3201 | SALINAS | PR |
| — | 787-825 | not yet reported which blocks → | PUERTO RICO TEL. CO. | 3201 | COAMO | PR |
| — | 787-826 | not yet reported which blocks → | PUERTO RICO TEL. CO. | 3201 | ANASCO | PR |
| — | 787-827 | 6XXX7XXX8XXX9XXX · 3 holders which blocks → | PUERTO RICO TEL. CO. | 3201 | LAS MARIAS | PR |
| — | 787-828 | not yet reported which blocks → | PUERTO RICO TEL. CO. | 3201 | JAYUYA | PR |
| — | 787-829 | not yet reported which blocks → | PUERTO RICO TEL. CO. | 3201 | ADJUNTAS | PR |
| — | 787-830 | not yet reported which blocks → | PUERTO RICO TEL. CO. | 3201 | ISABELA | PR |
| — | 787-831 | not yet reported which blocks → | PUERTO RICO TEL. CO. | 3201 | MAYAGUEZ | PR |
| — | 787-832 | not yet reported which blocks → | PUERTO RICO TEL. CO. | 3201 | MAYAGUEZ | PR |
| — | 787-833 | not yet reported which blocks → | PUERTO RICO TEL. CO. | 3201 | MAYAGUEZ | PR |
| — | 787-834 | not yet reported which blocks → | PUERTO RICO TEL. CO. | 3201 | MAYAGUEZ | PR |
| — | 787-835 | not yet reported which blocks → | PUERTO RICO TEL. CO. | 3201 | GUAYANILLA | PR |
| — | 787-836 | not yet reported which blocks → | PUERTO RICO TEL. CO. | 3201 | PENUELAS | PR |
| — | 787-837 | not yet reported which blocks → | PUERTO RICO TEL. CO. | 3201 | JUANA DIAZ | PR |
| — | 787-838 | 1XXX7XXX8XXX · 3 holders which blocks → | PUERTO RICO TEL. CO. | 3201 | MARICAO | PR |
| — | 787-839 | not yet reported which blocks → | PUERTO RICO TEL. CO. | 3201 | ARROYO | PR |
| — | 787-840 | not yet reported which blocks → | PUERTO RICO TEL. CO. | 3201 | PONCE | PR |
| — | 787-841 | not yet reported which blocks → | PUERTO RICO TEL. CO. | 3201 | PONCE | PR |
| — | 787-842 | not yet reported which blocks → | PUERTO RICO TEL. CO. | 3201 | PONCE | PR |
| — | 787-843 | not yet reported which blocks → | PUERTO RICO TEL. CO. | 3201 | PONCE | PR |
| — | 787-844 | not yet reported which blocks → | PUERTO RICO TEL. CO. | 3201 | PONCE | PR |
| — | 787-845 | not yet reported which blocks → | PUERTO RICO TEL. CO. | 3201 | SAN ISABEL | PR |
| — | 787-846 | not yet reported which blocks → | PUERTO RICO TEL. CO. | 3201 | BARCELONTA | PR |
| — | 787-847 | not yet reported which blocks → | PUERTO RICO TEL. CO. | 3201 | VILLALBA | PR |
| — | 787-848 | not yet reported which blocks → | PUERTO RICO TEL. CO. | 3201 | PONCE | PR |
| — | 787-849 | 8XXX which blocks → | PUERTO RICO TEL. CO. | 3201 | HORMIGUERO | PR |
| — | 787-850 | not yet reported which blocks → | PUERTO RICO TEL. CO. | 3201 | HUMACAO | PR |
| — | 787-851 | not yet reported which blocks → | PUERTO RICO TEL. CO. | 3201 | CABO ROJO | PR |
| — | 787-852 | not yet reported which blocks → | PUERTO RICO TEL. CO. | 3201 | HUMACAO | PR |
| — | 787-853 | 6XXX7XXX · 2 holders which blocks → | PUERTO RICO TEL. CO. | 3201 | AGUIRRE | PR |
| — | 787-854 | not yet reported which blocks → | PUERTO RICO TEL. CO. | 3201 | MANATI | PR |
| — | 787-855 | not yet reported which blocks → | PUERTO RICO TEL. CO. | 3201 | VEGA BAJA | PR |
| — | 787-856 | not yet reported which blocks → | PUERTO RICO TEL. CO. | 3201 | YAUCO | PR |
| — | 787-857 | not yet reported which blocks → | PUERTO RICO TEL. CO. | 3201 | BARRANQUTS | PR |
| — | 787-858 | not yet reported which blocks → | PUERTO RICO TEL. CO. | 3201 | VEGA BAJA | PR |
| — | 787-859 | not yet reported which blocks → | PUERTO RICO TEL. CO. | 3201 | COROZAL | PR |
| — | 787-860 | not yet reported which blocks → | PUERTO RICO TEL. CO. | 3201 | FAJARDO | PR |
| — | 787-861 | 7XXX8XXX · 2 holders which blocks → | PUERTO RICO TEL. CO. | 3201 | MAUNABO | PR |
| — | 787-862 | not yet reported which blocks → | PUERTO RICO TEL. CO. | 3201 | MOROVIS | PR |
Source: NANPA CO Code Assignments (Utilized, All States, Public), file date 09/20/2026 — Tier A primary source, refreshed on every import. Viewing is free; bulk downloads require a membership.