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 678
LEVEL 3 TELECOM OF GEORGIA, LP - GA 26
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
2007-10-10 678-394 0–9 XXXall 10 · 6 holders which blocks → LEVEL 3 TELECOM OF GEORGIA, LP - GA 7490 BUFORD GA
2006-01-20 678-954 0–9 XXXall 10 · 7 holders which blocks → LEVEL 3 TELECOM OF GEORGIA, LP - GA 7490 ATLANTA GA
2005-01-18 678-703 0–9 XXXwhole prefix which blocks → LEVEL 3 TELECOM OF GEORGIA, LP - GA 7490 ATLANTA NW GA
2005-01-18 678-955 0–9 XXXwhole prefix which blocks → LEVEL 3 TELECOM OF GEORGIA, LP - GA 7490 ATLANTA NE GA
2005-01-18 678-970 0–9 XXXwhole prefix which blocks → LEVEL 3 TELECOM OF GEORGIA, LP - GA 7490 ATLANTA NE GA
2004-11-01 678-550 0–9 XXXwhole prefix which blocks → LEVEL 3 TELECOM OF GEORGIA, LP - GA 7490 ATLANTA NW GA
2001-08-29 678-586 0XXX1XXX3XXX4XXX5XXX6XXX7XXX8XXX9XXX · 3 holders which blocks → LEVEL 3 TELECOM OF GEORGIA, LP - GA 7490 ATLANTA SO GA
2001-06-25 678-905 0XXX1XXX3XXX4XXX5XXX6XXX7XXX8XXX9XXX which blocks → LEVEL 3 TELECOM OF GEORGIA, LP - GA 7490 ATLANTA NW GA
2001-06-25 678-906 0XXX1XXX3XXX4XXX5XXX6XXX7XXX8XXX9XXX · 3 holders which blocks → LEVEL 3 TELECOM OF GEORGIA, LP - GA 7490 ATLANTA NE GA
2001-03-19 678-916 0XXX1XXX4XXX5XXX6XXX7XXX8XXX9XXX · 2 holders which blocks → LEVEL 3 TELECOM OF GEORGIA, LP - GA 7490 ATLANTA GA
— 678-221 1XXX4XXX6XXX7XXX8XXX · 3 holders which blocks → LEVEL 3 TELECOM OF GEORGIA, LP - GA 7490 ATLANTA NE GA
— 678-222 6XXX8XXX which blocks → LEVEL 3 TELECOM OF GEORGIA, LP - GA 7490 ATLANTA NE GA
— 678-223 1XXX3XXX4XXX5XXX6XXX7XXX8XXX · 5 holders which blocks → LEVEL 3 TELECOM OF GEORGIA, LP - GA 7490 ATLANTA NW GA
— 678-292 3XXX5XXX6XXX8XXX · 4 holders which blocks → LEVEL 3 TELECOM OF GEORGIA, LP - GA 7490 ATLANTA NE GA
— 678-346 0XXX1XXX5XXX6XXX8XXX which blocks → LEVEL 3 TELECOM OF GEORGIA, LP - GA 7490 ATLANTA NE GA
— 678-347 0XXX1XXX3XXX5XXX6XXX · 3 holders which blocks → LEVEL 3 TELECOM OF GEORGIA, LP - GA 7490 ATLANTA NE GA
— 678-348 0XXX1XXX2XXX3XXX4XXX6XXX · 3 holders which blocks → LEVEL 3 TELECOM OF GEORGIA, LP - GA 7490 ATLANTA NW GA
— 678-349 1XXX2XXX4XXX6XXX7XXX8XXX · 2 holders which blocks → LEVEL 3 TELECOM OF GEORGIA, LP - GA 7490 ATLANTA NE GA
— 678-350 1XXX3XXX4XXX5XXX6XXX8XXX which blocks → LEVEL 3 TELECOM OF GEORGIA, LP - GA 7490 ATLANTA NE GA
— 678-353 1XXX4XXX5XXX6XXX7XXX8XXX9XXX · 3 holders which blocks → LEVEL 3 TELECOM OF GEORGIA, LP - GA 7490 ATLANTA NE GA
— 678-375 not yet reported which blocks → LEVEL 3 TELECOM OF GEORGIA, LP - GA 7490 ATLANTA NE GA
— 678-477 1XXX2XXX3XXX4XXX5XXX6XXX8XXX which blocks → LEVEL 3 TELECOM OF GEORGIA, LP - GA 7490 ATLANTA NE GA
— 678-501 1XXX4XXX5XXX6XXX7XXX8XXX · 2 holders which blocks → LEVEL 3 TELECOM OF GEORGIA, LP - GA 7490 ATLANTA NW GA
— 678-690 0–9 XXXall 10 · 3 holders which blocks → LEVEL 3 TELECOM OF GEORGIA, LP - GA 7490 ATLANTA NE GA
— 678-743 1XXX2XXX3XXX4XXX5XXX6XXX7XXX8XXX9XXX · 3 holders which blocks → LEVEL 3 TELECOM OF GEORGIA, LP - GA 7490 ATLANTA NE GA
— 678-744 1XXX2XXX3XXX4XXX5XXX6XXX7XXX8XXX9XXX · 3 holders which blocks → LEVEL 3 TELECOM OF GEORGIA, LP - GA 7490 ATLANTA NW GA

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.