NumberResearch Membership · Data 09/21/2026

Recent prefix assignments

0 prefixes assigned in the last 30 days · from the daily NANPA CO code file, 09/21/2026

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 606
WINDSTREAM KENTUCKY EAST, INC. - LONDON 43
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
2017-11-21 606-578 0XXX1XXX2XXX3XXX9XXX · 4 holders which blocks → WINDSTREAM KENTUCKY EAST, INC. - LONDON 9691 JENKINS KY
2015-04-21 606-719 9XXX which blocks → WINDSTREAM KENTUCKY EAST, INC. - LONDON 9691 CUMBERLAND KY
2012-01-30 606-401 0–9 XXXall 10 · 4 holders which blocks → WINDSTREAM KENTUCKY EAST, INC. - LONDON 9691 LONDON KY
2012-01-30 606-543 0XXX1XXX2XXX3XXX4XXX5XXX6XXX · 4 holders which blocks → WINDSTREAM KENTUCKY EAST, INC. - LONDON 9691 EVARTS KY
2012-01-30 606-721 0XXX1XXX2XXX4XXX6XXX7XXX8XXX9XXX · 5 holders which blocks → WINDSTREAM KENTUCKY EAST, INC. - LONDON 9691 WASHINGTON KY
2012-01-30 606-895 4XXX which blocks → WINDSTREAM KENTUCKY EAST, INC. - LONDON 9691 IRVINE KY
2002-10-07 606-330 not yet reported which blocks → WINDSTREAM KENTUCKY EAST, INC. - LONDON 9691 LONDON KY
2002-09-26 606-277 not yet reported which blocks → WINDSTREAM KENTUCKY EAST, INC. - LONDON 9691 BARBOURVL KY
— 606-256 not yet reported which blocks → WINDSTREAM KENTUCKY EAST, INC. - LONDON 9691 MT VERNON KY
— 606-274 not yet reported which blocks → WINDSTREAM KENTUCKY EAST, INC. - LONDON 9691 SHOPVILLE KY
— 606-379 not yet reported which blocks → WINDSTREAM KENTUCKY EAST, INC. - LONDON 9691 EUBANK KY
— 606-382 not yet reported which blocks → WINDSTREAM KENTUCKY EAST, INC. - LONDON 9691 WHITE LILY KY
— 606-423 not yet reported which blocks → WINDSTREAM KENTUCKY EAST, INC. - LONDON 9691 SCIENCE HL KY
— 606-453 not yet reported which blocks → WINDSTREAM KENTUCKY EAST, INC. - LONDON 9691 LIVINGSTON KY
— 606-542 not yet reported which blocks → WINDSTREAM KENTUCKY EAST, INC. - LONDON 9691 FLAT LICK KY
— 606-545 none assigned yet which blocks → WINDSTREAM KENTUCKY EAST, INC. - LONDON 9691 BARBOURVL KY
— 606-546 not yet reported which blocks → WINDSTREAM KENTUCKY EAST, INC. - LONDON 9691 BARBOURVL KY
— 606-589 not yet reported which blocks → WINDSTREAM KENTUCKY EAST, INC. - LONDON 9691 CUMBERLAND KY
— 606-596 not yet reported which blocks → WINDSTREAM KENTUCKY EAST, INC. - LONDON 9691 MANCHESTER KY
— 606-598 not yet reported which blocks → WINDSTREAM KENTUCKY EAST, INC. - LONDON 9691 MANCHESTER KY
— 606-599 none assigned yet which blocks → WINDSTREAM KENTUCKY EAST, INC. - LONDON 9691 MANCHESTER KY
— 606-723 not yet reported which blocks → WINDSTREAM KENTUCKY EAST, INC. - LONDON 9691 IRVINE KY
— 606-724 0XXX which blocks → WINDSTREAM KENTUCKY EAST, INC. - LONDON 9691 MT OLIVET KY
— 606-726 not yet reported which blocks → WINDSTREAM KENTUCKY EAST, INC. - LONDON 9691 IRVINE KY
— 606-728 0XXX1XXX4XXX7XXX8XXX · 2 holders which blocks → WINDSTREAM KENTUCKY EAST, INC. - LONDON 9691 GERMANTOWN KY
— 606-735 1XXX6XXX · 2 holders which blocks → WINDSTREAM KENTUCKY EAST, INC. - LONDON 9691 BROOKSVL KY
— 606-742 not yet reported which blocks → WINDSTREAM KENTUCKY EAST, INC. - LONDON 9691 LEWISBURG KY
— 606-747 1XXX2XXX3XXX4XXX6XXX7XXX8XXX · 4 holders which blocks → WINDSTREAM KENTUCKY EAST, INC. - LONDON 9691 JOHNSVILLE KY
— 606-756 0XXX1XXX4XXX5XXX6XXX8XXX · 3 holders which blocks → WINDSTREAM KENTUCKY EAST, INC. - LONDON 9691 AUGUSTA KY
— 606-758 not yet reported which blocks → WINDSTREAM KENTUCKY EAST, INC. - LONDON 9691 BRODHEAD KY
— 606-759 not yet reported which blocks → WINDSTREAM KENTUCKY EAST, INC. - LONDON 9691 WASHINGTON KY
— 606-763 0XXX which blocks → WINDSTREAM KENTUCKY EAST, INC. - LONDON 9691 MAYS LICK KY
— 606-832 not yet reported which blocks → WINDSTREAM KENTUCKY EAST, INC. - LONDON 9691 JENKINS KY
— 606-837 not yet reported which blocks → WINDSTREAM KENTUCKY EAST, INC. - LONDON 9691 EVARTS KY
— 606-843 not yet reported which blocks → WINDSTREAM KENTUCKY EAST, INC. - LONDON 9691 EBERNSTADT KY
— 606-847 not yet reported which blocks → WINDSTREAM KENTUCKY EAST, INC. - LONDON 9691 ONEIDA KY
— 606-862 not yet reported which blocks → WINDSTREAM KENTUCKY EAST, INC. - LONDON 9691 LONDON KY
— 606-864 not yet reported which blocks → WINDSTREAM KENTUCKY EAST, INC. - LONDON 9691 LONDON KY
— 606-871 not yet reported which blocks → WINDSTREAM KENTUCKY EAST, INC. - LONDON 9691 FAUBUSH KY
— 606-877 not yet reported which blocks → WINDSTREAM KENTUCKY EAST, INC. - LONDON 9691 LONDON KY
— 606-878 not yet reported which blocks → WINDSTREAM KENTUCKY EAST, INC. - LONDON 9691 LONDON KY
— 606-882 0XXX which blocks → WINDSTREAM KENTUCKY EAST, INC. - LONDON 9691 DOVER KY
— 606-883 not yet reported which blocks → WINDSTREAM KENTUCKY EAST, INC. - LONDON 9691 FERNLEAF KY

Source: NANPA CO Code Assignments (Utilized, All States, Public), file date 09/21/2026 — Tier A primary source, refreshed on every import. Viewing is free; bulk downloads require a membership.