NumberResearch Membership · Data 09/20/2026

Recent prefix assignments

355 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, last 30 days
8X8, INC. 38
ONVOY, LLC - CA 31
NEW CINGULAR WIRELESS PCS, LLC - IL 28
NEW CINGULAR WIRELESS PCS, LLC - DC 26
ONVOY, LLC - NJ 18
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
Download CSV ↓
Recent NPA-NXX prefix assignments
AssignedNPA-NXXThousands-blocks taken (last-4 opening)Code holderOCNRate centerState
2002-08-19 517-714 0XXX which blocks → LEVEL 3 COMMUNICATIONS, LLC - MI 6120 BURLINGTON MI
2002-08-19 517-756 2XXX3XXX5XXX6XXX8XXX · 5 holders which blocks → LEVEL 3 COMMUNICATIONS, LLC - MI 6120 UNION CITY MI
2002-08-19 517-774 0XXX2XXX3XXX5XXX6XXX7XXX9XXX · 7 holders which blocks → LEVEL 3 COMMUNICATIONS, LLC - MI 6120 COLDWTR LK MI
2002-08-19 517-781 0XXX1XXX2XXX3XXX5XXX6XXX7XXX8XXX9XXX · 5 holders which blocks → LEVEL 3 COMMUNICATIONS, LLC - MI 6120 COLDWATER MI
2002-08-19 517-858 0XXX1XXX2XXX5XXX6XXX7XXX8XXX9XXX · 7 holders which blocks → LEVEL 3 COMMUNICATIONS, LLC - MI 6120 BRONSON MI
2002-08-19 567-238 6XXX9XXX · 2 holders which blocks → LEVEL 3 COMMUNICATIONS, LLC - OH 4863 LOUDONVL OH
2002-08-19 567-380 3XXX7XXX9XXX · 3 holders which blocks → LEVEL 3 COMMUNICATIONS, LLC - OH 4863 SCOTT OH
2002-08-19 567-386 0XXX1XXX2XXX3XXX6XXX8XXX9XXX · 6 holders which blocks → LEVEL 3 COMMUNICATIONS, LLC - OH 4863 WAYNEBRDNR OH
2002-08-19 567-391 0XXX1XXX3XXX5XXX6XXX8XXX9XXX · 5 holders which blocks → LEVEL 3 COMMUNICATIONS, LLC - OH 4863 NEW LONDON OH
2002-08-19 567-393 0XXX1XXX2XXX3XXX5XXX6XXX7XXX8XXX9XXX · 4 holders which blocks → LEVEL 3 COMMUNICATIONS, LLC - OH 4863 GALION OH
2002-08-19 567-401 0XXX1XXX2XXX3XXX5XXX6XXX7XXX8XXX9XXX · 9 holders which blocks → LEVEL 3 COMMUNICATIONS, LLC - OH 4863 MILAN OH
2002-08-19 567-412 0XXX1XXX2XXX3XXX5XXX · 4 holders which blocks → LEVEL 3 COMMUNICATIONS, LLC - OH 4863 WEST SALEM OH
2002-08-19 567-424 0XXX1XXX3XXX5XXX6XXX7XXX9XXX · 6 holders which blocks → LEVEL 3 COMMUNICATIONS, LLC - OH 4863 NORWALK OH
2002-08-19 567-432 0XXX1XXX3XXX5XXX6XXX8XXX9XXX · 6 holders which blocks → LEVEL 3 COMMUNICATIONS, LLC - OH 4863 NO BALTIMR OH
2002-08-19 567-443 0XXX1XXX2XXX3XXX5XXX6XXX7XXX8XXX9XXX · 4 holders which blocks → LEVEL 3 COMMUNICATIONS, LLC - OH 4863 CRESTLINE OH
2002-08-19 567-472 0XXX2XXX6XXX · 2 holders which blocks → LEVEL 3 COMMUNICATIONS, LLC - OH 4863 PEMBERVL OH
2002-08-19 567-495 0XXX1XXX2XXX5XXX7XXX8XXX9XXX · 6 holders which blocks → LEVEL 3 COMMUNICATIONS, LLC - OH 4863 WESTON OH
2002-08-19 704-402 0–9 XXXall 10 · 2 holders which blocks → NEW CINGULAR WIRELESS PCS, LLC - GA 6214 STATESVL NC
2002-08-19 765-328 0XXX1XXX8XXX9XXX · 2 holders which blocks → LEVEL 3 COMMUNICATIONS, LLC - IN 4803 BROOKVILLE IN
2002-08-19 765-334 0XXX8XXX · 2 holders which blocks → LEVEL 3 COMMUNICATIONS, LLC - IN 4803 CAMBDG CY IN
2002-08-19 765-377 0XXX1XXX2XXX5XXX6XXX7XXX8XXX9XXX · 8 holders which blocks → LEVEL 3 COMMUNICATIONS, LLC - IN 4803 CONNERSVL IN
2002-08-19 765-392 0XXX1XXX2XXX3XXX5XXX6XXX8XXX9XXX · 5 holders which blocks → LEVEL 3 COMMUNICATIONS, LLC - IN 4803 CARTHAGE IN
2002-08-19 765-530 0XXX1XXX2XXX3XXX5XXX6XXX7XXX8XXX9XXX · 6 holders which blocks → LEVEL 3 COMMUNICATIONS, LLC - IN 4803 HAGERSTOWN IN
2002-08-19 765-594 0XXX1XXX8XXX9XXX · 2 holders which blocks → LEVEL 3 COMMUNICATIONS, LLC - IN 4803 LYNN IN
2002-08-19 765-595 0XXX1XXX5XXX6XXX7XXX8XXX9XXX · 6 holders which blocks → LEVEL 3 COMMUNICATIONS, LLC - IN 4803 WINCHESTER IN
2002-08-19 765-596 6XXX7XXX which blocks → LEVEL 3 COMMUNICATIONS, LLC - IN 4803 LIBERTY IN
2002-08-19 765-598 5XXX7XXX · 2 holders which blocks → LEVEL 3 COMMUNICATIONS, LLC - IN 4803 RICHMOND IN
2002-08-19 765-740 0XXX2XXX · 2 holders which blocks → LEVEL 3 COMMUNICATIONS, LLC - IN 4803 MORRISTOWN IN
2002-08-19 803-893 1XXX2XXX3XXX5XXX6XXX7XXX8XXX9XXX · 4 holders which blocks → LEVEL 3 COMMUNICATIONS, LLC - SC 5258 ESTILL SC
2002-08-19 843-547 1XXX2XXX3XXX4XXX5XXX6XXX7XXX8XXX9XXX · 7 holders which blocks → LEVEL 3 COMMUNICATIONS, LLC - SC 5258 RIDGELAND SC
2002-08-19 843-548 1XXX2XXX3XXX4XXX5XXX6XXX7XXX8XXX9XXX · 5 holders which blocks → LEVEL 3 COMMUNICATIONS, LLC - SC 5258 LOWCOUNTRY SC
2002-08-19 903-200 0XXX1XXX2XXX3XXX5XXX6XXX7XXX8XXX9XXX · 6 holders which blocks → LEVEL 3 COMMUNICATIONS, LLC - TX 6114 COLLINSVL TX
2002-08-19 903-201 0XXX1XXX2XXX3XXX5XXX6XXX7XXX8XXX · 4 holders which blocks → LEVEL 3 COMMUNICATIONS, LLC - TX 6114 LEONARD TX
2002-08-19 903-206 0XXX1XXX2XXX3XXX6XXX7XXX8XXX9XXX · 5 holders which blocks → LEVEL 3 COMMUNICATIONS, LLC - TX 6114 TRENTON TX
2002-08-19 903-207 0XXX1XXX2XXX3XXX5XXX7XXX8XXX9XXX · 5 holders which blocks → LEVEL 3 COMMUNICATIONS, LLC - TX 6114 GUNTER TX
2002-08-19 940-202 0XXX1XXX2XXX3XXX5XXX6XXX7XXX8XXX9XXX · 4 holders which blocks → LEVEL 3 COMMUNICATIONS, LLC - TX 6114 TIOGA TX
2002-08-19 985-247 0XXX1XXX2XXX3XXX5XXX6XXX7XXX8XXX9XXX · 4 holders which blocks → LEVEL 3 COMMUNICATIONS, LLC - LA 3232 AMITE CITY LA
2002-08-19 989-319 7XXX8XXX which blocks → LEVEL 3 COMMUNICATIONS, LLC - MI 6120 DURAND MI
2002-08-19 989-769 0XXX1XXX2XXX3XXX5XXX6XXX7XXX8XXX9XXX which blocks → LEVEL 3 COMMUNICATIONS, LLC - MI 6120 OVID MI
2002-08-16 307-200 0XXX1XXX2XXX3XXX5XXX6XXX7XXX8XXX9XXX · 7 holders which blocks → LEVEL 3 COMMUNICATIONS, LLC - WY 9416 JACKSON WY
2002-08-16 334-219 0XXX1XXX2XXX3XXX5XXX6XXX7XXX8XXX9XXX · 3 holders which blocks → LEVEL 3 COMMUNICATIONS, LLC - AL 5255 LAFAYETTE AL
2002-08-16 417-200 0XXX1XXX2XXX3XXX5XXX6XXX7XXX8XXX9XXX · 5 holders which blocks → LEVEL 3 COMMUNICATIONS, LLC - MO 4932 GALENA MO
2002-08-16 417-201 0XXX1XXX2XXX3XXX5XXX6XXX7XXX8XXX9XXX · 5 holders which blocks → LEVEL 3 COMMUNICATIONS, LLC - MO 4932 BRADLEYVL MO
2002-08-16 417-202 0XXX1XXX2XXX3XXX5XXX6XXX7XXX8XXX9XXX · 5 holders which blocks → LEVEL 3 COMMUNICATIONS, LLC - MO 4932 BLUE EYE MO
2002-08-16 417-203 0XXX1XXX2XXX3XXX5XXX6XXX7XXX8XXX9XXX · 6 holders which blocks → LEVEL 3 COMMUNICATIONS, LLC - MO 4932 CRANE MO
2002-08-16 567-228 0XXX1XXX2XXX3XXX5XXX6XXX7XXX8XXX9XXX · 5 holders which blocks → LEVEL 3 COMMUNICATIONS, LLC - OH 4863 BELLEVUE OH
2002-08-16 567-234 0XXX1XXX2XXX3XXX5XXX6XXX7XXX8XXX · 6 holders which blocks → LEVEL 3 COMMUNICATIONS, LLC - OH 4863 BERLIN HTS OH
2002-08-16 567-235 2XXX which blocks → LEVEL 3 COMMUNICATIONS, LLC - OH 4863 EVANSPORT OH
2002-08-16 567-237 0XXX1XXX8XXX9XXX · 3 holders which blocks → LEVEL 3 COMMUNICATIONS, LLC - OH 4863 BETTSVILLE OH
2002-08-16 567-239 0XXX1XXX2XXX3XXX5XXX6XXX7XXX8XXX9XXX · 2 holders which blocks → LEVEL 3 COMMUNICATIONS, LLC - OH 4863 BRYAN OH

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.