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 |
|---|---|---|---|---|---|---|
| 2022-03-09 | 223-727 | 0XXX2XXX5XXX6XXX7XXX · 4 holders which blocks → | TON80 COMMUNICATIONS, LLC | 516J | TOWER CITY | PA |
| 2022-02-28 | 223-543 | 0XXX3XXX4XXX5XXX · 2 holders which blocks → | TON80 COMMUNICATIONS, LLC | 516J | ST THOMAS | PA |
| 2022-02-09 | 223-366 | 0XXX1XXX3XXX4XXX5XXX8XXX9XXX · 4 holders which blocks → | TON80 COMMUNICATIONS, LLC | 516J | STRASBURG | PA |
| 2022-02-08 | 223-678 | 0XXX1XXX5XXX6XXX8XXX9XXX · 6 holders which blocks → | TON80 COMMUNICATIONS, LLC | 516J | SCHAEFESTN | PA |
| 2022-02-04 | 223-362 | 0XXX1XXX2XXX3XXX4XXX5XXX · 4 holders which blocks → | TON80 COMMUNICATIONS, LLC | 516J | NEWPORT | PA |
| 2022-02-04 | 223-966 | 0XXX1XXX2XXX3XXX6XXX · 5 holders which blocks → | TON80 COMMUNICATIONS, LLC | 516J | RICHFIELD | PA |
| 2022-01-20 | 223-624 | 0XXX4XXX5XXX6XXX · 3 holders which blocks → | TON80 COMMUNICATIONS, LLC | 516J | NEWBURG | PA |
| 2022-01-18 | 223-466 | 0XXX1XXX3XXX4XXX5XXX8XXX · 4 holders which blocks → | TON80 COMMUNICATIONS, LLC | 516J | MT GRETNA | PA |
| 2022-01-18 | 223-883 | 0XXX1XXX3XXX6XXX7XXX9XXX · 4 holders which blocks → | TON80 COMMUNICATIONS, LLC | 516J | MILLERSTN | PA |
| 2022-01-14 | 223-639 | 5XXX6XXX7XXX · 2 holders which blocks → | TON80 COMMUNICATIONS, LLC | 516J | MARYSVILLE | PA |
| 2022-01-14 | 223-832 | 0XXX1XXX4XXX5XXX6XXX · 3 holders which blocks → | TON80 COMMUNICATIONS, LLC | 516J | KIRKWOOD | PA |
| 2022-01-11 | 223-763 | 0XXX4XXX5XXX6XXX8XXX · 4 holders which blocks → | TON80 COMMUNICATIONS, LLC | 516J | GAP | PA |
| 2022-01-05 | 223-746 | 0XXX1XXX4XXX7XXX8XXX9XXX · 4 holders which blocks → | TON80 COMMUNICATIONS, LLC | 516J | MIFFLINTN | PA |
| 2021-12-20 | 223-286 | 0–9 XXXall 10 · 4 holders which blocks → | TON80 COMMUNICATIONS, LLC | 516J | BROGUE | PA |
| 2020-10-13 | 223-797 | 0–9 XXXall 10 · 2 holders which blocks → | TON80 COMMUNICATIONS, LLC | 516J | HARISBGZN1 | PA |
| — | 223-563 | 0XXX4XXX5XXX · 3 holders which blocks → | TON80 COMMUNICATIONS, LLC | 516J | MARION | 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.