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.
| Assigned | NPA-NXX | Thousands-blocks taken (last-4 opening) | Code holder | OCN | Rate center | State |
|---|---|---|---|---|---|---|
| 2023-05-09 | 513-747 | 0–9 XXXall 10 · 3 holders which blocks → | TELEPORT COMMUNICATIONS AMERICA, LLC - OH | 7532 | HAMILTON | OH |
| 2021-12-08 | 513-949 | 0XXX1XXX3XXX4XXX5XXX6XXX7XXX8XXX · 5 holders which blocks → | TELEPORT COMMUNICATIONS AMERICA, LLC - OH | 7532 | WAYNESVL | OH |
| 2020-07-10 | 513-689 | 0–9 XXXall 10 · 5 holders which blocks → | TELEPORT COMMUNICATIONS AMERICA, LLC - OH | 7532 | LEBANON | OH |
| 2016-02-12 | 513-975 | 0–9 XXXall 10 · 3 holders which blocks → | TELEPORT COMMUNICATIONS AMERICA, LLC - OH | 7532 | CINCINNATI | OH |
| 2014-03-04 | 513-657 | 0–9 XXXall 10 · 5 holders which blocks → | TELEPORT COMMUNICATIONS AMERICA, LLC - OH | 7532 | CINCINNATI | OH |
| 2014-02-26 | 513-592 | 0–9 XXXall 10 · 5 holders which blocks → | TELEPORT COMMUNICATIONS AMERICA, LLC - OH | 7532 | CINCINNATI | OH |
| 2012-07-19 | 513-901 | 0–9 XXXall 10 · 8 holders which blocks → | TELEPORT COMMUNICATIONS AMERICA, LLC - OH | 7532 | WILLIAMSBG | OH |
| 2012-01-10 | 513-512 | 0–9 XXXall 10 · 3 holders which blocks → | TELEPORT COMMUNICATIONS AMERICA, LLC - OH | 7532 | CINCINNATI | OH |
| 2011-02-09 | 513-900 | 0–9 XXXall 10 · 4 holders which blocks → | TELEPORT COMMUNICATIONS AMERICA, LLC - OH | 7532 | LTL MIAMI | OH |
| 2010-05-06 | 513-409 | 0–9 XXXall 10 · 5 holders which blocks → | TELEPORT COMMUNICATIONS AMERICA, LLC - OH | 7532 | LEBANON | OH |
| 2002-04-23 | 513-341 | 0XXX1XXX3XXX4XXX5XXX6XXX7XXX8XXX9XXX · 4 holders which blocks → | TELEPORT COMMUNICATIONS AMERICA, LLC - OH | 7532 | HAMILTON | OH |
| 2001-03-06 | 513-830 | 3XXX4XXX5XXX6XXX7XXX8XXX · 2 holders which blocks → | TELEPORT COMMUNICATIONS AMERICA, LLC - OH | 7532 | CINCINNATI | OH |
| — | 513-826 | not yet reported which blocks → | TELEPORT COMMUNICATIONS AMERICA, LLC - OH | 7532 | CINCINNATI | OH |
| — | 513-833 | 0XXX1XXX3XXX4XXX5XXX6XXX7XXX9XXX · 2 holders which blocks → | TELEPORT COMMUNICATIONS AMERICA, LLC - OH | 7532 | LTL MIAMI | OH |
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.