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
Aug 2026
Jul 2026
Jun 2026
May 2026
Apr 2026
Mar 2026
Feb 2026
Jan 2026
Dec 2025
Nov 2025
Oct 2025
| Assigned | NPA-NXX | Thousands-blocks taken (last-4 opening) | Code holder | OCN | Rate center | State |
|---|---|---|---|---|---|---|
| — | 787-762 | not yet reported which blocks → | PUERTO RICO TEL. CO. | 3201 | CAROLINA | PR |
| — | 787-763 | not yet reported which blocks → | PUERTO RICO TEL. CO. | 3201 | RIOPIEDRAS | PR |
| — | 787-764 | not yet reported which blocks → | PUERTO RICO TEL. CO. | 3201 | RIOPIEDRAS | PR |
| — | 787-765 | not yet reported which blocks → | PUERTO RICO TEL. CO. | 3201 | RIOPIEDRAS | PR |
| — | 787-766 | not yet reported which blocks → | PUERTO RICO TEL. CO. | 3201 | RIOPIEDRAS | PR |
| — | 787-767 | not yet reported which blocks → | PUERTO RICO TEL. CO. | 3201 | RIOPIEDRAS | PR |
| — | 787-768 | not yet reported which blocks → | PUERTO RICO TEL. CO. | 3201 | CAROLINA | PR |
| — | 787-769 | not yet reported which blocks → | PUERTO RICO TEL. CO. | 3201 | CAROLINA | PR |
| — | 787-770 | not yet reported which blocks → | PR | |||
| — | 787-771 | not yet reported which blocks → | PUERTO RICO TEL. CO. | 3201 | RIOPIEDRAS | PR |
| — | 787-772 | not yet reported which blocks → | PUERTO RICO TEL. CO. | 3201 | RIOPIEDRAS | PR |
| — | 787-773 | 1XXX which blocks → | PUERTO RICO TEL. CO. | 3201 | RIOPIEDRAS | PR |
| — | 787-774 | not yet reported which blocks → | PUERTO RICO TEL. CO. | 3201 | PUEBLOVIEJ | PR |
| — | 787-775 | not yet reported which blocks → | PUERTO RICO TEL. CO. | 3201 | PUEBLOVIEJ | PR |
| — | 787-776 | not yet reported which blocks → | PUERTO RICO TEL. CO. | 3201 | CAROLINA | PR |
| — | 787-777 | 1XXX which blocks → | PUERTO RICO TEL. CO. | 3201 | RIOPIEDRAS | PR |
| — | 787-778 | not yet reported which blocks → | PUERTO RICO TEL. CO. | 3201 | BAYAMONNOR | PR |
| — | 787-779 | 9XXX which blocks → | PUERTO RICO TEL. CO. | 3201 | BAYAMONNOR | PR |
| — | 787-780 | not yet reported which blocks → | PUERTO RICO TEL. CO. | 3201 | BAYAMONNOR | PR |
| — | 787-781 | not yet reported which blocks → | PUERTO RICO TEL. CO. | 3201 | PUEBLOVIEJ | PR |
| — | 787-782 | not yet reported which blocks → | PUERTO RICO TEL. CO. | 3201 | PUEBLOVIEJ | PR |
| — | 787-783 | not yet reported which blocks → | PUERTO RICO TEL. CO. | 3201 | PUEBLOVIEJ | PR |
| — | 787-784 | not yet reported which blocks → | PUERTO RICO TEL. CO. | 3201 | LEVITTOWN | PR |
| — | 787-785 | not yet reported which blocks → | PUERTO RICO TEL. CO. | 3201 | BAYAMONNOR | PR |
| — | 787-786 | not yet reported which blocks → | PUERTO RICO TEL. CO. | 3201 | BAYAMONNOR | PR |
| — | 787-787 | not yet reported which blocks → | PUERTO RICO TEL. CO. | 3201 | BAYAMONNOR | PR |
| — | 787-788 | not yet reported which blocks → | PUERTO RICO TEL. CO. | 3201 | CATANO | PR |
| — | 787-789 | not yet reported which blocks → | PUERTO RICO TEL. CO. | 3201 | GUAYNABO | PR |
| — | 787-790 | not yet reported which blocks → | PUERTO RICO TEL. CO. | 3201 | GUAYNABO | PR |
| — | 787-791 | not yet reported which blocks → | PUERTO RICO TEL. CO. | 3201 | ISLA VERDE | PR |
| — | 787-792 | not yet reported which blocks → | PUERTO RICO TEL. CO. | 3201 | PUEBLOVIEJ | PR |
| — | 787-793 | not yet reported which blocks → | PUERTO RICO TEL. CO. | 3201 | PUEBLOVIEJ | PR |
| — | 787-794 | 7XXX8XXX · 2 holders which blocks → | PUERTO RICO TEL. CO. | 3201 | TOA BAJA | PR |
| — | 787-795 | not yet reported which blocks → | PUERTO RICO TEL. CO. | 3201 | LEVITTOWN | PR |
| — | 787-796 | not yet reported which blocks → | PUERTO RICO TEL. CO. | 3201 | DORADO | PR |
| — | 787-797 | not yet reported which blocks → | PUERTO RICO TEL. CO. | 3201 | BAYAMONSUR | PR |
| — | 787-798 | not yet reported which blocks → | PUERTO RICO TEL. CO. | 3201 | BAYAMONNOR | PR |
| — | 787-799 | not yet reported which blocks → | PUERTO RICO TEL. CO. | 3201 | BAYAMONSUR | PR |
| — | 787-801 | not yet reported which blocks → | PUERTO RICO TEL. CO. | 3201 | FAJARDO | PR |
| — | 787-802 | 6XXX8XXX · 2 holders which blocks → | PUERTO RICO TEL. CO. | 3201 | COROZAL | PR |
| — | 787-803 | 7XXX8XXX9XXX · 3 holders which blocks → | PUERTO RICO TEL. CO. | 3201 | COAMO | PR |
| — | 787-804 | 3XXX4XXX6XXX · 2 holders which blocks → | PUERTO RICO TEL. CO. | 3201 | SABANAGRND | PR |
| — | 787-805 | not yet reported which blocks → | PUERTO RICO TEL. CO. | 3201 | MAYAGUEZ | PR |
| — | 787-806 | 5XXX6XXX7XXX8XXX9XXX · 2 holders which blocks → | PUERTO RICO TEL. CO. | 3201 | MAYAGUEZ | PR |
| — | 787-807 | not yet reported which blocks → | PUERTO RICO TEL. CO. | 3201 | VEGA BAJA | PR |
| — | 787-808 | 5XXX6XXX7XXX8XXX · 4 holders which blocks → | PUERTO RICO TEL. CO. | 3201 | LAJAS | PR |
| — | 787-809 | not yet reported which blocks → | PUERTO RICO TEL. CO. | 3201 | RIO GRANDE | PR |
| — | 787-810 | none assigned yet which blocks → | SUNCOM DBA T-MOBILE USA | 8645 | SANTURCE | PR |
| — | 787-811 | not yet reported which blocks → | MULTIPLE OCN LISTING | MULT | XXXXXXXXXX | PR |
| — | 787-812 | not yet reported which blocks → | PUERTO RICO TEL. CO. | 3201 | PONCE | 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.