NumberResearchRecent prefix assignments
341 prefixes assigned in the last 30 days · from the daily NANPA CO code file, 09/27/2026
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, last 30 days
New assignments by month
Sep 2026
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Dec 2025
Nov 2025
Oct 2025
| Assigned | NPA-NXX | Thousands-blocks taken (last-4 opening) | Code holder | OCN | Rate center | State |
|---|---|---|---|---|---|---|
| — | 330-327 | none assigned yet which blocks → | T-MOBILE USA, INC. | 6529 | CANTON | OH |
| — | 330-328 | none assigned yet which blocks → | T-MOBILE USA, INC. | 6529 | AKRON | OH |
| — | 330-329 | none assigned yet which blocks → | T-MOBILE USA, INC. | 6529 | AKRON | OH |
| — | 330-330 | 0–9 XXXall 10 · 2 holders which blocks → | T-MOBILE USA, INC. | 6529 | YOUNGSTOWN | OH |
| — | 330-332 | not yet reported which blocks → | OHIO BELL TEL CO | 9321 | SALEM | OH |
| — | 330-334 | not yet reported which blocks → | FRONTIER NORTH, INC. - OH | 0615 | WADSWORTH | OH |
| — | 330-335 | not yet reported which blocks → | FRONTIER NORTH, INC. - OH | 0615 | WADSWORTH | OH |
| — | 330-336 | not yet reported which blocks → | FRONTIER NORTH, INC. - OH | 0615 | WADSWORTH | OH |
| — | 330-337 | not yet reported which blocks → | OHIO BELL TEL CO | 9321 | SALEM | OH |
| — | 330-338 | 0XXX which blocks → | T-MOBILE USA, INC. | 6529 | AKRON | OH |
| — | 330-339 | not yet reported which blocks → | FRONTIER NORTH, INC. - OH | 0615 | NEWPHLDLPH | OH |
| — | 330-340 | not yet reported which blocks → | CELLCO PARTNERSHIP DBA VERIZON WIRELESS - OH | 6025 | NEWPHLDLPH | OH |
| — | 330-342 | not yet reported which blocks → | WINDSTREAM WESTERN RESERVE, INC. | 0666 | HUDSON | OH |
| — | 330-343 | not yet reported which blocks → | FRONTIER NORTH, INC. - OH | 0615 | NEWPHLDLPH | OH |
| — | 330-344 | 0XXX9XXX · 2 holders which blocks → | OHIO BELL TEL CO | 9321 | AKRON | OH |
| — | 330-345 | not yet reported which blocks → | BRIGHTSPEED OF NORTHWEST OHIO, INC. | 0661 | WOOSTER | OH |
| — | 330-346 | 3XXX which blocks → | OHIO BELL TEL CO | 9321 | KENT | OH |
| — | 330-347 | 0XXX2XXX which blocks → | T-MOBILE USA, INC. | 6529 | WOOSTER | OH |
| — | 330-348 | 0XXX5XXX8XXX · 3 holders which blocks → | T-MOBILE USA, INC. | 6529 | AURORA | OH |
| — | 330-350 | 3XXX4XXX5XXX7XXX8XXX9XXX · 5 holders which blocks → | T-MOBILE USA, INC. | 6529 | MEDINA | OH |
| — | 330-351 | none assigned yet which blocks → | T-MOBILE USA, INC. | 6529 | AKRON | OH |
| — | 330-352 | none assigned yet which blocks → | T-MOBILE USA, INC. | 6529 | AKRON | OH |
| — | 330-353 | 8XXX9XXX which blocks → | T-MOBILE USA, INC. | 6529 | CANTON | OH |
| — | 330-354 | 0XXX2XXX4XXX5XXX7XXX which blocks → | T-MOBILE USA, INC. | 6529 | HARTVILLE | OH |
| — | 330-358 | not yet reported which blocks → | BRIGHTSPEED OF NORTHWEST OHIO, INC. | 0661 | WAYLAND | OH |
| — | 330-359 | 1XXX3XXX4XXX8XXX9XXX · 4 holders which blocks → | FRONTIER NORTH, INC. - OH | 0615 | WILMOT | OH |
| — | 330-360 | not yet reported which blocks → | CELLCO PARTNERSHIP DBA VERIZON WIRELESS - OH | 6025 | YOUNGSTOWN | OH |
| — | 330-363 | not yet reported which blocks → | OHIO BELL TEL CO | 9321 | CANTON | OH |
| — | 330-364 | not yet reported which blocks → | FRONTIER NORTH, INC. - OH | 0615 | NEWPHLDLPH | OH |
| — | 330-365 | 0XXX1XXX5XXX6XXX7XXX8XXX9XXX · 4 holders which blocks → | FRONTIER NORTH, INC. - OH | 0615 | NEWPHLDLPH | OH |
| — | 330-367 | 5XXX7XXX9XXX · 3 holders which blocks → | BRIGHTSPEED OF NORTHWEST OHIO, INC. | 0661 | WARREN | OH |
| — | 330-369 | 9XXX which blocks → | BRIGHTSPEED OF NORTHWEST OHIO, INC. | 0661 | WARREN | OH |
| — | 330-370 | not yet reported which blocks → | OHIO BELL TEL CO | 9321 | AKRON | OH |
| — | 330-372 | not yet reported which blocks → | BRIGHTSPEED OF NORTHWEST OHIO, INC. | 0661 | WARREN | OH |
| — | 330-373 | 8XXX which blocks → | BRIGHTSPEED OF NORTHWEST OHIO, INC. | 0661 | WARREN | OH |
| — | 330-374 | not yet reported which blocks → | OHIO BELL TEL CO | 9321 | AKRON | OH |
| — | 330-375 | not yet reported which blocks → | OHIO BELL TEL CO | 9321 | AKRON | OH |
| — | 330-376 | not yet reported which blocks → | OHIO BELL TEL CO | 9321 | AKRON | OH |
| — | 330-377 | none assigned yet which blocks → | BRIGHTSPEED OF NORTHWEST OHIO, INC. | 0661 | GLENMONT | OH |
| — | 330-378 | none assigned yet which blocks → | BRIGHTSPEED OF NORTHWEST OHIO, INC. | 0661 | NASHVILLE | OH |
| — | 330-379 | not yet reported which blocks → | OHIO BELL TEL CO | 9321 | AKRON | OH |
| — | 330-380 | not yet reported which blocks → | SPOK, INC. | 6630 | YOUNGSTOWN | OH |
| — | 330-381 | not yet reported which blocks → | SPOK, INC. | 6630 | LISBON | OH |
| — | 330-382 | 2XXX3XXX4XXX5XXX6XXX · 2 holders which blocks → | OHIO BELL TEL CO | 9321 | ELIVERPOOL | OH |
| — | 330-383 | not yet reported which blocks → | CELLCO PARTNERSHIP DBA VERIZON WIRELESS - OH | 6025 | ELIVERPOOL | OH |
| — | 330-384 | not yet reported which blocks → | OHIO BELL TEL CO | 9321 | AKRON | OH |
| — | 330-385 | not yet reported which blocks → | OHIO BELL TEL CO | 9321 | ELIVERPOOL | OH |
| — | 330-386 | not yet reported which blocks → | OHIO BELL TEL CO | 9321 | ELIVERPOOL | OH |
| — | 330-387 | not yet reported which blocks → | AMERICAN MESSAGING SERVICES, LLC | 9748 | NILES | OH |
| — | 330-388 | not yet reported which blocks → | CELLCO PARTNERSHIP DBA VERIZON WIRELESS - OH | 6025 | AKRON | OH |
Source: NANPA CO Code Assignments (Utilized, All States, Public), file date 09/27/2026 — Tier A primary source, refreshed on every import. Viewing is free; bulk downloads require a membership.