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 |
|---|---|---|---|---|---|---|
| 2022-02-24 | 878-335 | 0XXX1XXX3XXX · 3 holders which blocks → | TON80 COMMUNICATIONS, LLC | 516J | LOWELLVL | PA |
| 2022-02-24 | 878-736 | 0XXX1XXX3XXX · 3 holders which blocks → | TON80 COMMUNICATIONS, LLC | 516J | MARCHAND | PA |
| 2022-02-24 | 878-782 | 0XXX1XXX2XXX3XXX5XXX6XXX7XXX8XXX9XXX · 5 holders which blocks → | TON80 COMMUNICATIONS, LLC | 516J | HOOKSTOWN | PA |
| 2022-02-18 | 878-784 | 0XXX6XXX · 2 holders which blocks → | TON80 COMMUNICATIONS, LLC | 516J | EPALESTINE | PA |
| 2022-02-14 | 878-673 | 0XXX2XXX3XXX8XXX9XXX · 4 holders which blocks → | TON80 COMMUNICATIONS, LLC | 516J | DERRY | PA |
| 2022-01-20 | 878-732 | 0–9 XXXall 10 · 3 holders which blocks → | TON80 COMMUNICATIONS, LLC | 516J | PTGSBNZN19 | PA |
| 2022-01-10 | 878-626 | 0–9 XXXall 10 · 4 holders which blocks → | TON80 COMMUNICATIONS, LLC | 516J | PTTSBGZON7 | PA |
| 2022-01-10 | 878-723 | 0–9 XXXall 10 · 4 holders which blocks → | TON80 COMMUNICATIONS, LLC | 516J | PTTSBGZON3 | PA |
| 2022-01-10 | 878-786 | 0–9 XXXall 10 · 5 holders which blocks → | TON80 COMMUNICATIONS, LLC | 516J | GREENSBURG | PA |
| 2022-01-10 | 878-834 | 0–9 XXXall 10 · 5 holders which blocks → | TON80 COMMUNICATIONS, LLC | 516J | PTTSBGZON8 | PA |
| 2022-01-08 | 878-253 | 0XXX1XXX6XXX7XXX8XXX · 4 holders which blocks → | TON80 COMMUNICATIONS, LLC | 516J | MONESSEN | PA |
| 2022-01-08 | 878-433 | 0XXX1XXX2XXX6XXX8XXX · 4 holders which blocks → | TON80 COMMUNICATIONS, LLC | 516J | CLAIRTON | PA |
| 2021-06-09 | 878-322 | 1XXX2XXX3XXX4XXX5XXX6XXX7XXX8XXX9XXX · 4 holders which blocks → | TON80 COMMUNICATIONS, LLC | 516J | DONORA | PA |
| 2021-04-16 | 878-844 | 0–9 XXXall 10 · 7 holders which blocks → | TON80 COMMUNICATIONS, LLC | 516J | INDIANA | PA |
| 2021-04-14 | 878-599 | 0–9 XXXall 10 · 5 holders which blocks → | TON80 COMMUNICATIONS, LLC | 516J | PTGSBNZN14 | PA |
| 2021-04-13 | 878-252 | 0–9 XXXall 10 · 4 holders which blocks → | TON80 COMMUNICATIONS, LLC | 516J | CRIDERSCOR | PA |
| 2021-04-12 | 878-598 | 0XXX1XXX2XXX3XXX5XXX6XXX7XXX8XXX9XXX · 5 holders which blocks → | TON80 COMMUNICATIONS, LLC | 516J | AMBRIDGE | PA |
| 2021-03-08 | 878-783 | 2XXX3XXX4XXX5XXX7XXX8XXX · 4 holders which blocks → | TON80 COMMUNICATIONS, LLC | 516J | AVONMORE | PA |
| — | 878-288 | 0XXX1XXX2XXX3XXX4XXX6XXX7XXX8XXX9XXX · 4 holders which blocks → | TON80 COMMUNICATIONS, LLC | 516J | BOLIVAR | PA |
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.