NumberResearch Membership · Data 09/19/2026

Recent prefix assignments

0 prefixes assigned in the last 30 days · from the daily NANPA CO code file, 09/19/2026

Full prefixes (NXX) Thousands-blocks (1,000-number pools)

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
CITIZENS TELECOM OF NE LLC DBA FRONTIER COM OF NE 28
New assignments by month Sep 2026 Aug 2026 Jul 2026 Jun 2026 May 2026 Apr 2026 Mar 2026 Feb 2026 Jan 2026 Dec 2025 Nov 2025 Oct 2025
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Recent NPA-NXX prefix assignments
AssignedNPA-NXXThousands-blocks taken (last-4 opening)Code holderOCNRate centerState
— 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 09/19/2026 — Tier A primary source, refreshed on every import. Viewing is free; bulk downloads require a membership.