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 330
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| Assigned | NPA-NXX | Thousands-blocks taken (last-4 opening) | Code holder | OCN | Rate center | State |
|---|---|---|---|---|---|---|
| 2019-08-28 | 330-910 | 0–9 XXXall 10 · 2 holders which blocks → | LEVEL 3 COMMUNICATIONS, LLC - OH | 4863 | AURORA | OH |
| 2011-12-06 | 330-915 | 0–9 XXXall 10 · 5 holders which blocks → | LEVEL 3 COMMUNICATIONS, LLC - OH | 4863 | CANTON | OH |
| 2005-12-22 | 330-681 | 0XXX1XXX4XXX6XXX7XXX8XXX · 5 holders which blocks → | LEVEL 3 COMMUNICATIONS, LLC - OH | 4863 | DELLROY | OH |
| 2004-09-27 | 330-765 | 2XXX3XXX5XXX6XXX7XXX8XXX9XXX · 4 holders which blocks → | LEVEL 3 COMMUNICATIONS, LLC - OH | 4863 | ORRVILLE | OH |
| 2002-12-17 | 330-470 | 0XXX1XXX2XXX3XXX5XXX6XXX7XXX8XXX9XXX · 5 holders which blocks → | LEVEL 3 COMMUNICATIONS, LLC - OH | 4863 | NO CANTON | OH |
| 2002-07-25 | 330-460 | 0XXX1XXX2XXX3XXX5XXX6XXX7XXX8XXX9XXX · 5 holders which blocks → | LEVEL 3 COMMUNICATIONS, LLC - OH | 4863 | BRUNSWICK | OH |
| 2002-07-23 | 330-556 | 0XXX1XXX2XXX3XXX5XXX6XXX7XXX8XXX9XXX · 5 holders which blocks → | LEVEL 3 COMMUNICATIONS, LLC - OH | 4863 | NEWPHLDLPH | OH |
| 2002-07-23 | 330-591 | 0XXX1XXX2XXX3XXX5XXX6XXX7XXX8XXX9XXX · 4 holders which blocks → | LEVEL 3 COMMUNICATIONS, LLC - OH | 4863 | MEDINA | OH |
| 2002-06-26 | 330-440 | 1XXX2XXX3XXX4XXX5XXX6XXX7XXX8XXX9XXX · 2 holders which blocks → | LEVEL 3 COMMUNICATIONS, LLC - OH | 4863 | NEWPHLDLPH | OH |
| 2002-06-26 | 330-449 | 1XXX2XXX3XXX4XXX5XXX6XXX7XXX8XXX9XXX · 4 holders which blocks → | LEVEL 3 COMMUNICATIONS, LLC - OH | 4863 | BERLIN | OH |
| 2002-06-25 | 330-401 | 1XXX2XXX3XXX4XXX5XXX6XXX7XXX8XXX9XXX which blocks → | LEVEL 3 COMMUNICATIONS, LLC - OH | 4863 | NEWPHLDLPH | OH |
| 2002-06-25 | 330-403 | 0–9 XXXall 10 · 5 holders which blocks → | LEVEL 3 COMMUNICATIONS, LLC - OH | 4863 | BERLIN | OH |
| 2002-05-29 | 330-662 | 1XXX2XXX3XXX4XXX5XXX6XXX7XXX8XXX9XXX · 4 holders which blocks → | LEVEL 3 COMMUNICATIONS, LLC - OH | 4863 | MEDINA | OH |
| 2002-05-08 | 330-439 | 0XXX1XXX2XXX3XXX5XXX6XXX7XXX8XXX9XXX · 4 holders which blocks → | LEVEL 3 COMMUNICATIONS, LLC - OH | 4863 | WOOSTER | OH |
| 2002-04-30 | 330-303 | 0XXX1XXX2XXX3XXX5XXX6XXX7XXX8XXX9XXX · 4 holders which blocks → | LEVEL 3 COMMUNICATIONS, LLC - OH | 4863 | ELIVERPOOL | OH |
| 2002-04-30 | 330-423 | 0XXX1XXX2XXX3XXX5XXX6XXX7XXX8XXX9XXX · 2 holders which blocks → | LEVEL 3 COMMUNICATIONS, LLC - OH | 4863 | YOUNGSTOWN | OH |
| 2002-04-30 | 330-984 | 0XXX1XXX2XXX3XXX5XXX6XXX7XXX8XXX9XXX · 3 holders which blocks → | LEVEL 3 COMMUNICATIONS, LLC - OH | 4863 | WARREN | OH |
| 2002-04-10 | 330-357 | 0–9 XXXall 10 · 4 holders which blocks → | LEVEL 3 COMMUNICATIONS, LLC - OH | 4863 | MANTUA | OH |
| 2002-03-21 | 330-236 | 0XXX1XXX2XXX3XXX5XXX6XXX7XXX8XXX9XXX · 6 holders which blocks → | LEVEL 3 COMMUNICATIONS, LLC - OH | 4863 | MASSILLON | OH |
| 2002-03-21 | 330-238 | 0XXX1XXX2XXX3XXX5XXX6XXX7XXX8XXX9XXX · 7 holders which blocks → | LEVEL 3 COMMUNICATIONS, LLC - OH | 4863 | ALLIANCE | OH |
| 2002-03-21 | 330-931 | 0XXX1XXX2XXX3XXX5XXX6XXX7XXX8XXX9XXX · 2 holders which blocks → | LEVEL 3 COMMUNICATIONS, LLC - OH | 4863 | KENT | OH |
| 2001-07-26 | 330-752 | 0XXX1XXX2XXX3XXX5XXX6XXX7XXX8XXX9XXX · 4 holders which blocks → | LEVEL 3 COMMUNICATIONS, LLC - OH | 4863 | AKRON | OH |
| 2001-07-26 | 330-754 | 0XXX1XXX2XXX3XXX5XXX6XXX7XXX8XXX9XXX · 4 holders which blocks → | LEVEL 3 COMMUNICATIONS, LLC - OH | 4863 | CANTON | OH |
| 2001-05-11 | 330-964 | 1XXX2XXX3XXX4XXX5XXX6XXX7XXX8XXX · 4 holders which blocks → | LEVEL 3 COMMUNICATIONS, LLC - OH | 4863 | LISBON | OH |
| 2001-05-08 | 330-476 | 0–9 XXXall 10 · 8 holders which blocks → | LEVEL 3 COMMUNICATIONS, LLC - OH | 4863 | CARROLLTON | OH |
| 2001-05-08 | 330-661 | 1XXX2XXX3XXX4XXX5XXX6XXX7XXX8XXX9XXX · 3 holders which blocks → | LEVEL 3 COMMUNICATIONS, LLC - OH | 4863 | MEDINA | OH |
| 2001-02-06 | 330-974 | 1XXX2XXX3XXX4XXX5XXX6XXX7XXX8XXX9XXX · 4 holders which blocks → | LEVEL 3 COMMUNICATIONS, LLC - OH | 4863 | WARREN | OH |
| — | 330-235 | 1XXX2XXX3XXX4XXX5XXX6XXX7XXX8XXX9XXX · 7 holders which blocks → | LEVEL 3 COMMUNICATIONS, LLC - OH | 4863 | RAVENNA | OH |
| — | 330-247 | 0XXX8XXX · 2 holders which blocks → | LEVEL 3 COMMUNICATIONS, LLC - OH | 4863 | AKRON | OH |
| — | 330-248 | 0XXX1XXX2XXX3XXX4XXX5XXX6XXX7XXX8XXX · 7 holders which blocks → | LEVEL 3 COMMUNICATIONS, LLC - OH | 4863 | ALLIANCE | OH |
| — | 330-249 | 1XXX3XXX4XXX5XXX7XXX · 4 holders which blocks → | LEVEL 3 COMMUNICATIONS, LLC - OH | 4863 | ATWATER | OH |
| — | 330-267 | 0XXX1XXX2XXX3XXX5XXX6XXX7XXX8XXX9XXX · 6 holders which blocks → | LEVEL 3 COMMUNICATIONS, LLC - OH | 4863 | HARTVILLE | OH |
| — | 330-272 | 1XXX2XXX3XXX4XXX5XXX6XXX7XXX8XXX · 2 holders which blocks → | LEVEL 3 COMMUNICATIONS, LLC - OH | 4863 | YOUNGSTOWN | OH |
| — | 330-408 | 0XXX3XXX4XXX5XXX6XXX7XXX8XXX9XXX · 5 holders which blocks → | LEVEL 3 COMMUNICATIONS, LLC - OH | 4863 | CANALFULTN | OH |
| — | 330-409 | 3XXX5XXX7XXX8XXX · 3 holders which blocks → | LEVEL 3 COMMUNICATIONS, LLC - OH | 4863 | CANTON | OH |
| — | 330-516 | 0XXX1XXX3XXX4XXX5XXX6XXX7XXX8XXX9XXX · 5 holders which blocks → | LEVEL 3 COMMUNICATIONS, LLC - OH | 4863 | DALTON | OH |
| — | 330-517 | 0XXX1XXX3XXX5XXX7XXX8XXX · 4 holders which blocks → | LEVEL 3 COMMUNICATIONS, LLC - OH | 4863 | GREENSBURG | OH |
| — | 330-552 | 0XXX1XXX3XXX4XXX5XXX6XXX7XXX8XXX9XXX · 7 holders which blocks → | LEVEL 3 COMMUNICATIONS, LLC - OH | 4863 | KENT | OH |
| — | 330-572 | 9XXX which blocks → | LEVEL 3 COMMUNICATIONS, LLC - OH | 4863 | AKRON | OH |
| — | 330-576 | 0XXX2XXX3XXX4XXX5XXX6XXX7XXX8XXX9XXX · 5 holders which blocks → | LEVEL 3 COMMUNICATIONS, LLC - OH | 4863 | MONTROSE | OH |
| — | 330-593 | 0XXX1XXX2XXX3XXX4XXX5XXX7XXX8XXX9XXX · 7 holders which blocks → | LEVEL 3 COMMUNICATIONS, LLC - OH | 4863 | KENT | OH |
| — | 330-639 | 1XXX3XXX4XXX5XXX6XXX7XXX8XXX9XXX · 3 holders which blocks → | LEVEL 3 COMMUNICATIONS, LLC - OH | 4863 | CANTON | OH |
| — | 330-680 | 1XXX2XXX3XXX4XXX5XXX6XXX7XXX8XXX9XXX · 5 holders which blocks → | LEVEL 3 COMMUNICATIONS, LLC - OH | 4863 | ALLIANCE | OH |
| — | 330-693 | 1XXX2XXX3XXX4XXX5XXX7XXX9XXX · 5 holders which blocks → | LEVEL 3 COMMUNICATIONS, LLC - OH | 4863 | LOUISVILLE | OH |
| — | 330-694 | 1XXX2XXX3XXX5XXX6XXX7XXX · 5 holders which blocks → | LEVEL 3 COMMUNICATIONS, LLC - OH | 4863 | MAGNOLWSBG | OH |
| — | 330-732 | 0XXX1XXX3XXX4XXX5XXX6XXX7XXX9XXX · 5 holders which blocks → | LEVEL 3 COMMUNICATIONS, LLC - OH | 4863 | MANTUA | OH |
| — | 330-737 | 1XXX2XXX3XXX5XXX6XXX7XXX8XXX · 5 holders which blocks → | LEVEL 3 COMMUNICATIONS, LLC - OH | 4863 | MASSILLON | OH |
| — | 330-775 | 0XXX2XXX3XXX4XXX5XXX6XXX7XXX8XXX9XXX · 4 holders which blocks → | LEVEL 3 COMMUNICATIONS, LLC - OH | 4863 | MASSILLON | OH |
| — | 330-776 | 0XXX1XXX2XXX3XXX4XXX5XXX6XXX7XXX8XXX · 5 holders which blocks → | LEVEL 3 COMMUNICATIONS, LLC - OH | 4863 | GREENSBURG | OH |
| — | 330-777 | 1XXX3XXX4XXX5XXX6XXX7XXX8XXX9XXX · 5 holders which blocks → | LEVEL 3 COMMUNICATIONS, LLC - OH | 4863 | AKRON | 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.