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 812
LEVEL 3 COMMUNICATIONS, LLC - IN 49
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
2017-06-30 812-975 0XXX2XXX3XXX4XXX5XXX6XXX7XXX · 4 holders which blocks → LEVEL 3 COMMUNICATIONS, LLC - IN 4803 EDINBURGH IN
2016-10-17 812-982 0XXX1XXX2XXX3XXX4XXX5XXX8XXX9XXX · 7 holders which blocks → LEVEL 3 COMMUNICATIONS, LLC - IN 4803 TENNYSON IN
2013-10-29 812-954 0–9 XXXall 10 · 6 holders which blocks → LEVEL 3 COMMUNICATIONS, LLC - IN 4803 AURORA IN
2006-01-16 812-965 0XXX1XXX2XXX4XXX5XXX6XXX7XXX8XXX9XXX · 5 holders which blocks → LEVEL 3 COMMUNICATIONS, LLC - IN 4803 NEWBURGH IN
2003-03-05 812-785 0–9 XXXall 10 · 5 holders which blocks → LEVEL 3 COMMUNICATIONS, LLC - IN 4803 MORGANTOWN IN
2003-01-07 812-572 0XXX1XXX2XXX3XXX5XXX6XXX7XXX8XXX9XXX · 2 holders which blocks → LEVEL 3 COMMUNICATIONS, LLC - IN 4803 CORYDON IN
2002-08-20 812-666 0XXX1XXX2XXX3XXX5XXX6XXX7XXX8XXX · 7 holders which blocks → LEVEL 3 COMMUNICATIONS, LLC - IN 4803 ORLEANS IN
2002-08-20 812-702 0XXX1XXX2XXX3XXX8XXX · 3 holders which blocks → LEVEL 3 COMMUNICATIONS, LLC - IN 4803 CLAY CITY IN
2002-08-20 812-710 0XXX1XXX2XXX · 3 holders which blocks → LEVEL 3 COMMUNICATIONS, LLC - IN 4803 FARMERSBG IN
2002-08-20 812-712 none assigned yet which blocks → LEVEL 3 COMMUNICATIONS, LLC - IN 4803 FAIRBANKS IN
2002-08-20 812-716 0XXX1XXX2XXX3XXX5XXX6XXX7XXX8XXX9XXX · 5 holders which blocks → LEVEL 3 COMMUNICATIONS, LLC - IN 4803 GREENSBURG IN
2002-08-20 812-717 0XXX1XXX2XXX3XXX5XXX6XXX7XXX8XXX9XXX · 7 holders which blocks → LEVEL 3 COMMUNICATIONS, LLC - IN 4803 BATESVILLE IN
2002-08-20 812-718 0XXX1XXX2XXX3XXX5XXX6XXX7XXX8XXX9XXX · 5 holders which blocks → LEVEL 3 COMMUNICATIONS, LLC - IN 4803 NO VERNON IN
2002-08-20 812-722 0XXX1XXX2XXX3XXX5XXX6XXX7XXX8XXX9XXX · 5 holders which blocks → LEVEL 3 COMMUNICATIONS, LLC - IN 4803 SCOTTSBURG IN
2002-08-20 812-730 2XXX5XXX7XXX · 3 holders which blocks → LEVEL 3 COMMUNICATIONS, LLC - IN 4803 WORTHINGTN IN
2002-08-20 812-731 none assigned yet which blocks → LEVEL 3 COMMUNICATIONS, LLC - IN 4803 OAKTOWN IN
2002-08-20 812-733 0XXX1XXX3XXX7XXX8XXX9XXX · 4 holders which blocks → LEVEL 3 COMMUNICATIONS, LLC - IN 4803 SALEM IN
2002-08-20 812-741 2XXX which blocks → LEVEL 3 COMMUNICATIONS, LLC - IN 4803 WHEATLAND IN
2002-08-20 812-750 0XXX1XXX2XXX5XXX6XXX7XXX8XXX · 6 holders which blocks → LEVEL 3 COMMUNICATIONS, LLC - IN 4803 VERSAILLES IN
2002-08-20 812-757 0XXX1XXX2XXX7XXX8XXX9XXX · 3 holders which blocks → LEVEL 3 COMMUNICATIONS, LLC - IN 4803 BICKNELL IN
2002-08-20 812-762 0XXX1XXX2XXX3XXX5XXX6XXX7XXX8XXX9XXX · 3 holders which blocks → LEVEL 3 COMMUNICATIONS, LLC - IN 4803 HANOVER IN
2002-08-20 812-770 0XXX1XXX2XXX3XXX5XXX6XXX7XXX8XXX9XXX · 3 holders which blocks → LEVEL 3 COMMUNICATIONS, LLC - IN 4803 HAZLETON IN
2002-08-20 812-801 0XXX1XXX2XXX3XXX5XXX6XXX7XXX8XXX9XXX · 2 holders which blocks → LEVEL 3 COMMUNICATIONS, LLC - IN 4803 MADISON IN
2002-08-20 812-809 0XXX1XXX7XXX8XXX9XXX · 5 holders which blocks → LEVEL 3 COMMUNICATIONS, LLC - IN 4803 PETERSBURG IN
2002-08-20 812-813 0XXX2XXX5XXX6XXX8XXX · 3 holders which blocks → LEVEL 3 COMMUNICATIONS, LLC - IN 4803 FREELANDVL IN
2002-07-16 812-669 0XXX1XXX2XXX3XXX5XXX6XXX7XXX8XXX9XXX · 2 holders which blocks → LEVEL 3 COMMUNICATIONS, LLC - IN 4803 COLUMBUS IN
2002-07-16 812-672 0XXX1XXX7XXX8XXX9XXX · 4 holders which blocks → LEVEL 3 COMMUNICATIONS, LLC - IN 4803 SEYMOUR IN
2002-07-16 812-675 0XXX1XXX2XXX3XXX5XXX6XXX7XXX8XXX9XXX · 3 holders which blocks → LEVEL 3 COMMUNICATIONS, LLC - IN 4803 BEDFORD IN
2002-06-04 812-671 1XXX2XXX3XXX4XXX5XXX6XXX7XXX8XXX which blocks → LEVEL 3 COMMUNICATIONS, LLC - IN 4803 BLOOMINGTN IN
2002-05-13 812-638 0XXX2XXX3XXX6XXX7XXX8XXX9XXX · 6 holders which blocks → LEVEL 3 COMMUNICATIONS, LLC - IN 4803 SULLIVAN IN
2002-05-13 812-645 0XXX1XXX2XXX3XXX5XXX6XXX7XXX8XXX9XXX which blocks → LEVEL 3 COMMUNICATIONS, LLC - IN 4803 TERREHAUTE IN
2002-05-13 812-650 0XXX1XXX2XXX3XXX5XXX6XXX7XXX8XXX9XXX · 6 holders which blocks → LEVEL 3 COMMUNICATIONS, LLC - IN 4803 BLOOMINGTN IN
2002-05-07 812-618 0XXX1XXX2XXX3XXX5XXX6XXX7XXX8XXX9XXX · 2 holders which blocks → LEVEL 3 COMMUNICATIONS, LLC - IN 4803 EVANSVILLE IN
2002-05-07 812-619 0XXX1XXX2XXX5XXX6XXX7XXX8XXX · 5 holders which blocks → LEVEL 3 COMMUNICATIONS, LLC - IN 4803 TELL CITY IN
2002-04-15 812-652 0XXX1XXX2XXX4XXX5XXX6XXX7XXX8XXX · 6 holders which blocks → LEVEL 3 COMMUNICATIONS, LLC - IN 4803 SPENCER IN
2001-05-23 812-302 1XXX2XXX3XXX4XXX5XXX6XXX7XXX8XXX9XXX · 5 holders which blocks → LEVEL 3 COMMUNICATIONS, LLC - IN 4803 FLAT ROCK IN
2001-05-07 812-408 0XXX1XXX2XXX3XXX4XXX5XXX6XXX7XXX8XXX · 4 holders which blocks → LEVEL 3 COMMUNICATIONS, LLC - IN 4803 REDDINGTON IN
2001-05-07 812-413 1XXX2XXX3XXX5XXX6XXX7XXX8XXX · 7 holders which blocks → LEVEL 3 COMMUNICATIONS, LLC - IN 4803 AUSTIN IN
2001-05-07 812-420 0XXX1XXX2XXX3XXX4XXX5XXX6XXX7XXX9XXX · 6 holders which blocks → LEVEL 3 COMMUNICATIONS, LLC - IN 4803 BRAZIL IN
2001-05-07 812-512 0XXX1XXX2XXX3XXX4XXX5XXX6XXX7XXX8XXX · 5 holders which blocks → LEVEL 3 COMMUNICATIONS, LLC - IN 4803 LINTON IN
— 812-226 0XXX1XXX2XXX3XXX5XXX6XXX7XXX8XXX9XXX · 7 holders which blocks → LEVEL 3 COMMUNICATIONS, LLC - IN 4803 VEVAY IN
— 812-307 0XXX1XXX2XXX3XXX4XXX5XXX8XXX9XXX · 5 holders which blocks → LEVEL 3 COMMUNICATIONS, LLC - IN 4803 MT VERNON IN
— 812-405 0XXX1XXX2XXX3XXX4XXX5XXX7XXX8XXX9XXX · 5 holders which blocks → LEVEL 3 COMMUNICATIONS, LLC - IN 4803 SEYMOUR IN
— 812-496 0XXX1XXX2XXX3XXX5XXX6XXX7XXX8XXX9XXX · 4 holders which blocks → LEVEL 3 COMMUNICATIONS, LLC - IN 4803 LAWRENCEBG IN
— 812-518 0XXX1XXX2XXX3XXX4XXX5XXX6XXX8XXX9XXX · 3 holders which blocks → LEVEL 3 COMMUNICATIONS, LLC - IN 4803 NEWBURGH IN
— 812-551 0XXX1XXX2XXX3XXX5XXX6XXX7XXX8XXX9XXX · 4 holders which blocks → LEVEL 3 COMMUNICATIONS, LLC - IN 4803 RISING SUN IN
— 812-558 1XXX2XXX3XXX4XXX5XXX6XXX7XXX8XXX9XXX · 3 holders which blocks → LEVEL 3 COMMUNICATIONS, LLC - IN 4803 BLOOMINGTN IN
— 812-601 0XXX1XXX2XXX7XXX8XXX9XXX · 3 holders which blocks → LEVEL 3 COMMUNICATIONS, LLC - IN 4803 PETERSBURG IN
— 812-674 1XXX2XXX3XXX4XXX5XXX6XXX7XXX8XXX · 5 holders which blocks → LEVEL 3 COMMUNICATIONS, LLC - IN 4803 WASHINGTON IN

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.