NumberResearchRecent prefix assignments
0 prefixes assigned in the last 30 days · from the daily NANPA CO code file, 09/24/2026
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 308
New assignments by month
Sep 2026
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Oct 2025
| Assigned | NPA-NXX | Thousands-blocks taken (last-4 opening) | Code holder | OCN | Rate center | State |
|---|---|---|---|---|---|---|
| — | 308-233 | none assigned yet which blocks → | CITIZENS TELECOM OF NE LLC DBA FRONTIER COM OF NE | 1128 | KEARNEY | NE |
| — | 308-234 | not yet reported which blocks → | CITIZENS TELECOM OF NE LLC DBA FRONTIER COM OF NE | 1128 | KEARNEY | NE |
| — | 308-236 | not yet reported which blocks → | CITIZENS TELECOM OF NE LLC DBA FRONTIER COM OF NE | 1128 | KEARNEY | NE |
| — | 308-237 | not yet reported which blocks → | CITIZENS TELECOM OF NE LLC DBA FRONTIER COM OF NE | 1128 | KEARNEY | NE |
| — | 308-238 | 8XXX which blocks → | CITIZENS TELECOM OF NE LLC DBA FRONTIER COM OF NE | 1128 | KEARNEY | NE |
| — | 308-268 | not yet reported which blocks → | CITIZENS TELECOM OF NE LLC DBA FRONTIER COM OF NE | 1128 | BEAVERCITY | NE |
| — | 308-269 | not yet reported which blocks → | CITIZENS TELECOM OF NE LLC DBA FRONTIER COM OF NE | 1128 | NAPONEE | NE |
| — | 308-338 | not yet reported which blocks → | CITIZENS TELECOM OF NE LLC DBA FRONTIER COM OF NE | 1128 | KEARNEY | NE |
| — | 308-349 | not yet reported which blocks → | CITIZENS TELECOM OF NE LLC DBA FRONTIER COM OF NE | 1128 | WILSONVL | NE |
| — | 308-388 | 6XXX7XXX · 2 holders which blocks → | CITIZENS TELECOM OF NE LLC DBA FRONTIER COM OF NE | 1128 | PLEASANTON | NE |
| — | 308-425 | not yet reported which blocks → | CITIZENS TELECOM OF NE LLC DBA FRONTIER COM OF NE | 1128 | FRANKLIN | NE |
| — | 308-428 | not yet reported which blocks → | CITIZENS TELECOM OF NE LLC DBA FRONTIER COM OF NE | 1128 | GREELEY | NE |
| — | 308-457 | 4XXX5XXX which blocks → | CITIZENS TELECOM OF NE LLC DBA FRONTIER COM OF NE | 1128 | MILLER | NE |
| — | 308-472 | not yet reported which blocks → | CITIZENS TELECOM OF NE LLC DBA FRONTIER COM OF NE | 1128 | BERTRAND | NE |
| — | 308-473 | not yet reported which blocks → | CITIZENS TELECOM OF NE LLC DBA FRONTIER COM OF NE | 1128 | ORLEANS | NE |
| — | 308-563 | not yet reported which blocks → | CITIZENS TELECOM OF NE LLC DBA FRONTIER COM OF NE | 1128 | HEARTWELL | NE |
| — | 308-728 | not yet reported which blocks → | CITIZENS TELECOM OF NE LLC DBA FRONTIER COM OF NE | 1128 | ORD | NE |
| — | 308-752 | 7XXX8XXX · 2 holders which blocks → | CITIZENS TELECOM OF NE LLC DBA FRONTIER COM OF NE | 1128 | SUMNER | NE |
| — | 308-775 | 5XXX6XXX7XXX8XXX · 2 holders which blocks → | CITIZENS TELECOM OF NE LLC DBA FRONTIER COM OF NE | 1128 | BLOOMINGTN | NE |
| — | 308-799 | not yet reported which blocks → | CITIZENS TELECOM OF NE LLC DBA FRONTIER COM OF NE | 1128 | REPUBLCNCY | NE |
| — | 308-826 | 7XXX which blocks → | CITIZENS TELECOM OF NE LLC DBA FRONTIER COM OF NE | 1128 | AMHERST | NE |
| — | 308-865 | not yet reported which blocks → | CITIZENS TELECOM OF NE LLC DBA FRONTIER COM OF NE | 1128 | KEARNEY | NE |
| — | 308-868 | not yet reported which blocks → | CITIZENS TELECOM OF NE LLC DBA FRONTIER COM OF NE | 1128 | STAMFORD | NE |
| — | 308-893 | 6XXX8XXX · 2 holders which blocks → | CITIZENS TELECOM OF NE LLC DBA FRONTIER COM OF NE | 1128 | RIVERDALE | NE |
| — | 308-894 | not yet reported which blocks → | CITIZENS TELECOM OF NE LLC DBA FRONTIER COM OF NE | 1128 | PALMER | NE |
| — | 308-927 | not yet reported which blocks → | CITIZENS TELECOM OF NE LLC DBA FRONTIER COM OF NE | 1128 | EDISON | NE |
| — | 308-928 | not yet reported which blocks → | CITIZENS TELECOM OF NE LLC DBA FRONTIER COM OF NE | 1128 | ALMA | NE |
| — | 308-938 | not yet reported which blocks → | CITIZENS TELECOM OF NE LLC DBA FRONTIER COM OF NE | 1128 | HILDRETH | NE |
Source: NANPA CO Code Assignments (Utilized, All States, Public), file date 09/24/2026 — Tier A primary source, refreshed on every import. Viewing is free; bulk downloads require a membership.