NumberResearch Membership · Data 09/20/2026

Recent prefix assignments

0 prefixes assigned in the last 30 days · from the daily NANPA CO code file, 09/20/2026

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
LEVEL 3 COMMUNICATIONS, LLC - NE 20
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
2026-04-22 308-399 7XXX which blocks → LEVEL 3 COMMUNICATIONS, LLC - NE 3233 HAYES CTR NE
2024-10-02 308-332 7XXX which blocks → LEVEL 3 COMMUNICATIONS, LLC - NE 3233 ARCHER NE
2023-05-05 308-261 0XXX1XXX2XXX · 3 holders which blocks → LEVEL 3 COMMUNICATIONS, LLC - NE 3233 IMPERIAL NE
2023-01-03 308-200 0XXX1XXX2XXX3XXX8XXX · 5 holders which blocks → LEVEL 3 COMMUNICATIONS, LLC - NE 3233 MCCOOK NE
2023-01-03 308-205 0XXX1XXX2XXX8XXX · 3 holders which blocks → LEVEL 3 COMMUNICATIONS, LLC - NE 3233 ELWOOD NE
2022-03-18 308-465 0XXX1XXX2XXX3XXX4XXX5XXX6XXX7XXX8XXX · 6 holders which blocks → LEVEL 3 COMMUNICATIONS, LLC - NE 3233 OGALLALA NE
2021-06-29 308-456 0XXX1XXX · 2 holders which blocks → LEVEL 3 COMMUNICATIONS, LLC - NE 3233 MITCHELL NE
2020-05-06 308-302 0XXX1XXX9XXX · 3 holders which blocks → LEVEL 3 COMMUNICATIONS, LLC - NE 3233 TRYON NE
2019-09-26 308-305 0XXX1XXX · 2 holders which blocks → LEVEL 3 COMMUNICATIONS, LLC - NE 3233 PAXTON NE
2019-09-26 308-306 0XXX1XXX · 2 holders which blocks → LEVEL 3 COMMUNICATIONS, LLC - NE 3233 WALLACE NE
2019-09-13 308-271 0XXX2XXX · 2 holders which blocks → LEVEL 3 COMMUNICATIONS, LLC - NE 3233 SPALDING NE
2019-09-13 308-273 0XXX1XXX2XXX · 3 holders which blocks → LEVEL 3 COMMUNICATIONS, LLC - NE 3233 BRULE NE
2019-09-13 308-274 0XXX2XXX · 2 holders which blocks → LEVEL 3 COMMUNICATIONS, LLC - NE 3233 CHAPMAN NE
2019-09-13 308-301 0XXX2XXX9XXX · 3 holders which blocks → LEVEL 3 COMMUNICATIONS, LLC - NE 3233 CEDAR RPDS NE
2018-11-19 308-251 0–9 XXXall 10 · 6 holders which blocks → LEVEL 3 COMMUNICATIONS, LLC - NE 3233 KEARNEY NE
2017-05-22 308-244 0–9 XXXall 10 · 4 holders which blocks → LEVEL 3 COMMUNICATIONS, LLC - NE 3233 PALMER NE
2004-08-19 308-217 0–9 XXXall 10 · 8 holders which blocks → LEVEL 3 COMMUNICATIONS, LLC - NE 3233 LEXINGTON NE
2003-01-08 308-229 0–9 XXXall 10 · 3 holders which blocks → LEVEL 3 COMMUNICATIONS, LLC - NE 3233 LYMAN NE
— 308-221 0–9 XXXall 10 · 6 holders which blocks → LEVEL 3 COMMUNICATIONS, LLC - NE 3233 NO PLATTE NE
— 308-646 1XXX2XXX3XXX6XXX · 2 holders which blocks → LEVEL 3 COMMUNICATIONS, LLC - NE 3233 GRAND IS NE

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.