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 765
LEVEL 3 COMMUNICATIONS, LLC - IN 61
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
2023-02-13 765-796 1XXX8XXX9XXX · 2 holders which blocks → LEVEL 3 COMMUNICATIONS, LLC - IN 4803 TIPTON IN
2020-12-14 765-550 0XXX2XXX5XXX · 3 holders which blocks → LEVEL 3 COMMUNICATIONS, LLC - IN 4803 BROOKSTON IN
2017-06-30 765-290 0–9 XXXall 10 · 5 holders which blocks → LEVEL 3 COMMUNICATIONS, LLC - IN 4803 ROSEDALE IN
2006-01-30 765-705 0–9 XXXall 10 · 8 holders which blocks → LEVEL 3 COMMUNICATIONS, LLC - IN 4803 ALEXANDRIA IN
2006-01-25 765-637 0–9 XXXall 10 · 4 holders which blocks → LEVEL 3 COMMUNICATIONS, LLC - IN 4803 LAFAYETTE IN
2006-01-25 765-876 0XXX1XXX2XXX3XXX5XXX6XXX7XXX8XXX9XXX · 7 holders which blocks → LEVEL 3 COMMUNICATIONS, LLC - IN 4803 MUNCIE IN
2006-01-25 765-878 0–9 XXXall 10 · 5 holders which blocks → LEVEL 3 COMMUNICATIONS, LLC - IN 4803 KOKOMO IN
2004-12-22 765-232 1XXX2XXX3XXX5XXX6XXX7XXX · 5 holders which blocks → LEVEL 3 COMMUNICATIONS, LLC - IN 4803 UNION CITY IN
2004-10-20 765-405 0XXX1XXX2XXX3XXX5XXX6XXX7XXX8XXX9XXX · 7 holders which blocks → LEVEL 3 COMMUNICATIONS, LLC - IN 4803 YORKTOWN IN
2004-10-20 765-444 0XXX2XXX3XXX4XXX5XXX6XXX7XXX8XXX9XXX · 5 holders which blocks → LEVEL 3 COMMUNICATIONS, LLC - IN 4803 MIDDLETOWN IN
2004-06-24 765-353 3XXX4XXX which blocks → LEVEL 3 COMMUNICATIONS, LLC - IN 4803 UNION CITY IN
2004-06-17 765-233 0–9 XXXall 10 · 6 holders which blocks → LEVEL 3 COMMUNICATIONS, LLC - IN 4803 ALEXANDRIA IN
2004-03-31 765-387 0–9 XXXall 10 · 5 holders which blocks → LEVEL 3 COMMUNICATIONS, LLC - IN 4803 CHESTERFLD IN
2003-03-25 765-360 0XXX1XXX2XXX4XXX5XXX6XXX8XXX9XXX · 4 holders which blocks → LEVEL 3 COMMUNICATIONS, LLC - IN 4803 WILKINSON IN
2002-10-03 765-613 2XXX3XXX4XXX5XXX6XXX7XXX8XXX9XXX · 5 holders which blocks → LEVEL 3 COMMUNICATIONS, LLC - IN 4803 MARION IN
2002-08-22 765-205 1XXX2XXX3XXX4XXX5XXX6XXX7XXX8XXX9XXX · 4 holders which blocks → LEVEL 3 COMMUNICATIONS, LLC - IN 4803 CLINTON IN
2002-08-22 765-371 0XXX1XXX2XXX4XXX5XXX8XXX9XXX · 5 holders which blocks → LEVEL 3 COMMUNICATIONS, LLC - IN 4803 LAFONTAINE IN
2002-08-22 765-612 2XXX6XXX8XXX · 3 holders which blocks → LEVEL 3 COMMUNICATIONS, LLC - IN 4803 CRAWFODSVL IN
2002-08-22 765-633 0XXX1XXX2XXX3XXX4XXX6XXX7XXX8XXX · 7 holders which blocks → LEVEL 3 COMMUNICATIONS, LLC - IN 4803 DENVER IN
2002-08-22 765-736 1XXX2XXX4XXX5XXX9XXX · 3 holders which blocks → LEVEL 3 COMMUNICATIONS, LLC - IN 4803 JAMESTOWN IN
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
2002-05-13 765-570 0XXX1XXX2XXX3XXX5XXX6XXX7XXX8XXX9XXX · 6 holders which blocks → LEVEL 3 COMMUNICATIONS, LLC - IN 4803 RUSHVILLE IN
2002-04-25 765-588 0XXX1XXX2XXX3XXX5XXX6XXX7XXX8XXX9XXX · 5 holders which blocks → LEVEL 3 COMMUNICATIONS, LLC - IN 4803 LAFAYETTE IN
2002-03-21 765-575 0XXX1XXX2XXX3XXX5XXX6XXX7XXX8XXX9XXX · 5 holders which blocks → LEVEL 3 COMMUNICATIONS, LLC - IN 4803 NEW CASTLE IN
2002-03-13 765-276 1XXX2XXX3XXX4XXX6XXX7XXX8XXX · 5 holders which blocks → LEVEL 3 COMMUNICATIONS, LLC - IN 4803 GREENCASTL IN
2002-02-13 765-280 1XXX2XXX3XXX4XXX5XXX6XXX7XXX8XXX9XXX · 5 holders which blocks → LEVEL 3 COMMUNICATIONS, LLC - IN 4803 ROCKVILLE IN
2002-02-13 765-299 1XXX2XXX3XXX4XXX5XXX6XXX7XXX8XXX9XXX · 2 holders which blocks → LEVEL 3 COMMUNICATIONS, LLC - IN 4803 ATTICA IN
2002-02-13 765-323 1XXX2XXX3XXX4XXX5XXX7XXX8XXX9XXX · 7 holders which blocks → LEVEL 3 COMMUNICATIONS, LLC - IN 4803 CRAWFODSVL IN
2002-02-13 765-510 1XXX4XXX5XXX6XXX8XXX9XXX · 5 holders which blocks → LEVEL 3 COMMUNICATIONS, LLC - IN 4803 HARTFORDCY IN
2002-02-13 765-680 1XXX2XXX3XXX5XXX6XXX7XXX8XXX9XXX · 5 holders which blocks → LEVEL 3 COMMUNICATIONS, LLC - IN 4803 LEBANON IN
2002-02-13 765-697 7XXX8XXX which blocks → LEVEL 3 COMMUNICATIONS, LLC - IN 4803 ROANN IN
2001-12-06 765-819 0XXX1XXX2XXX3XXX4XXX6XXX7XXX8XXX · 5 holders which blocks → LEVEL 3 COMMUNICATIONS, LLC - IN 4803 BOSWELL IN
2001-12-04 765-810 0–9 XXXall 10 · 3 holders which blocks → LEVEL 3 COMMUNICATIONS, LLC - IN 4803 ANDERSON IN
2001-12-04 765-814 1XXX2XXX3XXX8XXX · 4 holders which blocks → LEVEL 3 COMMUNICATIONS, LLC - IN 4803 COVINGTON IN
2001-10-16 765-433 0XXX2XXX3XXX4XXX · 3 holders which blocks → LEVEL 3 COMMUNICATIONS, LLC - IN 4803 FARMLAND IN
2001-06-25 765-303 1XXX2XXX3XXX4XXX5XXX6XXX8XXX9XXX · 7 holders which blocks → LEVEL 3 COMMUNICATIONS, LLC - IN 4803 MONTPELIER IN
2001-06-18 765-356 1XXX2XXX3XXX4XXX5XXX6XXX7XXX8XXX · 5 holders which blocks → LEVEL 3 COMMUNICATIONS, LLC - IN 4803 ANDERSON IN
2001-06-04 765-231 1XXX2XXX4XXX5XXX6XXX8XXX · 5 holders which blocks → LEVEL 3 COMMUNICATIONS, LLC - IN 4803 COVINGTON IN
2001-05-09 765-314 1XXX2XXX3XXX4XXX5XXX6XXX7XXX · 4 holders which blocks → LEVEL 3 COMMUNICATIONS, LLC - IN 4803 BOSWELL IN
2001-05-08 765-327 1XXX2XXX3XXX4XXX5XXX6XXX7XXX8XXX9XXX · 4 holders which blocks → LEVEL 3 COMMUNICATIONS, LLC - IN 4803 PERU IN
2001-05-04 765-304 1XXX2XXX3XXX4XXX5XXX7XXX9XXX · 4 holders which blocks → LEVEL 3 COMMUNICATIONS, LLC - IN 4803 MAYS IN

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.