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
Sep 2026
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Oct 2025
| Assigned | NPA-NXX | Thousands-blocks taken (last-4 opening) | Code holder | OCN | Rate center | State |
|---|---|---|---|---|---|---|
| — | 787-711 | not yet reported which blocks → | MULTIPLE OCN LISTING | MULT | XXXXXXXXXX | PR |
| — | 787-712 | 2XXX3XXX7XXX · 3 holders which blocks → | PUERTO RICO TEL. CO. | 3201 | GURABO | PR |
| — | 787-713 | 3XXX7XXX which blocks → | PUERTO RICO TEL. CO. | 3201 | JUNCOS | PR |
| — | 787-714 | 8XXX9XXX · 2 holders which blocks → | PUERTO RICO TEL. CO. | 3201 | CIDRA | PR |
| — | 787-715 | 5XXX7XXX · 2 holders which blocks → | PUERTO RICO TEL. CO. | 3201 | SANLORENZO | PR |
| — | 787-716 | 7XXX9XXX · 2 holders which blocks → | PUERTO RICO TEL. CO. | 3201 | LASPIEDRAS | PR |
| — | 787-717 | not yet reported which blocks → | LIBERTY MOBILE PUERTO RICO INC. | 639J | SANTURCE | PR |
| — | 787-718 | 0–9 XXXwhole prefix which blocks → | LIBERTY MOBILE PUERTO RICO INC. | 639J | CAGUAS | PR |
| — | 787-720 | not yet reported which blocks → | PUERTO RICO TEL. CO. | 3201 | GUAYNABO | PR |
| — | 787-721 | not yet reported which blocks → | PUERTO RICO TEL. CO. | 3201 | SANTURCE | PR |
| — | 787-722 | not yet reported which blocks → | PUERTO RICO TEL. CO. | 3201 | SANTURCE | PR |
| — | 787-723 | not yet reported which blocks → | PUERTO RICO TEL. CO. | 3201 | SANTURCE | PR |
| — | 787-724 | not yet reported which blocks → | PUERTO RICO TEL. CO. | 3201 | SANTURCE | PR |
| — | 787-725 | not yet reported which blocks → | PUERTO RICO TEL. CO. | 3201 | SANTURCE | PR |
| — | 787-726 | not yet reported which blocks → | PUERTO RICO TEL. CO. | 3201 | SANTURCEES | PR |
| — | 787-727 | not yet reported which blocks → | PUERTO RICO TEL. CO. | 3201 | SANTURCEES | PR |
| — | 787-728 | not yet reported which blocks → | PUERTO RICO TEL. CO. | 3201 | SANTURCEES | PR |
| — | 787-729 | not yet reported which blocks → | PUERTO RICO TEL. CO. | 3201 | SANTURCE | PR |
| — | 787-730 | not yet reported which blocks → | PUERTO RICO TEL. CO. | 3201 | BAYAMONSUR | PR |
| — | 787-731 | not yet reported which blocks → | PUERTO RICO TEL. CO. | 3201 | GUAYNABO | PR |
| — | 787-732 | not yet reported which blocks → | PUERTO RICO TEL. CO. | 3201 | AGUASBUNAS | PR |
| — | 787-733 | not yet reported which blocks → | PUERTO RICO TEL. CO. | 3201 | LASPIEDRAS | PR |
| — | 787-734 | not yet reported which blocks → | PUERTO RICO TEL. CO. | 3201 | JUNCOS | PR |
| — | 787-735 | not yet reported which blocks → | PUERTO RICO TEL. CO. | 3201 | AIBONITO | PR |
| — | 787-736 | not yet reported which blocks → | PUERTO RICO TEL. CO. | 3201 | SANLORENZO | PR |
| — | 787-737 | not yet reported which blocks → | PUERTO RICO TEL. CO. | 3201 | GURABO | PR |
| — | 787-738 | not yet reported which blocks → | PUERTO RICO TEL. CO. | 3201 | CAYEY | PR |
| — | 787-739 | not yet reported which blocks → | PUERTO RICO TEL. CO. | 3201 | CIDRA | PR |
| — | 787-740 | not yet reported which blocks → | PUERTO RICO TEL. CO. | 3201 | BAYAMONNOR | PR |
| — | 787-741 | 6XXX which blocks → | PUERTO RICO TEL. CO. | 3201 | VIEQUES | PR |
| — | 787-742 | 6XXX8XXX · 2 holders which blocks → | PUERTO RICO TEL. CO. | 3201 | CULEBRA | PR |
| — | 787-743 | not yet reported which blocks → | PUERTO RICO TEL. CO. | 3201 | CAGUAS | PR |
| — | 787-744 | not yet reported which blocks → | PUERTO RICO TEL. CO. | 3201 | CAGUAS | PR |
| — | 787-745 | not yet reported which blocks → | PUERTO RICO TEL. CO. | 3201 | CAGUAS | PR |
| — | 787-746 | not yet reported which blocks → | PUERTO RICO TEL. CO. | 3201 | CAGUAS | PR |
| — | 787-747 | not yet reported which blocks → | PUERTO RICO TEL. CO. | 3201 | CAGUAS | PR |
| — | 787-748 | not yet reported which blocks → | PUERTO RICO TEL. CO. | 3201 | TRUJILLOAL | PR |
| — | 787-749 | not yet reported which blocks → | PUERTO RICO TEL. CO. | 3201 | PUEBLOVIEJ | PR |
| — | 787-750 | not yet reported which blocks → | PUERTO RICO TEL. CO. | 3201 | CAROLINA | PR |
| — | 787-751 | not yet reported which blocks → | PUERTO RICO TEL. CO. | 3201 | RIOPIEDRAS | PR |
| — | 787-752 | not yet reported which blocks → | PUERTO RICO TEL. CO. | 3201 | CAROLINA | PR |
| — | 787-753 | not yet reported which blocks → | PUERTO RICO TEL. CO. | 3201 | RIOPIEDRAS | PR |
| — | 787-754 | not yet reported which blocks → | PUERTO RICO TEL. CO. | 3201 | RIOPIEDRAS | PR |
| — | 787-755 | not yet reported which blocks → | PUERTO RICO TEL. CO. | 3201 | TRUJILLOAL | PR |
| — | 787-756 | not yet reported which blocks → | PUERTO RICO TEL. CO. | 3201 | RIOPIEDRAS | PR |
| — | 787-757 | not yet reported which blocks → | PUERTO RICO TEL. CO. | 3201 | CAROLINA | PR |
| — | 787-758 | not yet reported which blocks → | PUERTO RICO TEL. CO. | 3201 | RIOPIEDRAS | PR |
| — | 787-759 | not yet reported which blocks → | PUERTO RICO TEL. CO. | 3201 | RIOPIEDRAS | PR |
| — | 787-760 | not yet reported which blocks → | PUERTO RICO TEL. CO. | 3201 | TRUJILLOAL | PR |
| — | 787-761 | not yet reported which blocks → | PUERTO RICO TEL. CO. | 3201 | TRUJILLOAL | 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.