NumberResearch Membership · Data 09/24/2026

Recent prefix assignments

0 prefixes assigned in the last 30 days · from the daily NANPA CO code file, 09/24/2026

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 360
CENTURYTEL OF WASHINGTON, INC. DBA CENTURYLINK 35
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
2013-02-08 360-964 0–9 XXXall 10 · 5 holders which blocks → CENTURYTEL OF WASHINGTON, INC. DBA CENTURYLINK 2408 MONTESANO WA
— 360-245 0XXX1XXX2XXX4XXX5XXX6XXX7XXX8XXX9XXX · 3 holders which blocks → CENTURYTEL OF WASHINGTON, INC. DBA CENTURYLINK 2408 CURTIS WA
— 360-249 7XXX8XXX9XXX · 2 holders which blocks → CENTURYTEL OF WASHINGTON, INC. DBA CENTURYLINK 2408 MONTESANO WA
— 360-276 1XXX2XXX3XXX5XXX6XXX7XXX9XXX · 3 holders which blocks → CENTURYTEL OF WASHINGTON, INC. DBA CENTURYLINK 2408 PACIFICBCH WA
— 360-288 1XXX3XXX4XXX7XXX8XXX · 4 holders which blocks → CENTURYTEL OF WASHINGTON, INC. DBA CENTURYLINK 2408 LKQUINAULT WA
— 360-291 1XXX5XXX6XXX7XXX8XXX9XXX which blocks → CENTURYTEL OF WASHINGTON, INC. DBA CENTURYLINK 2408 CURTIS WA
— 360-295 1XXX2XXX4XXX5XXX6XXX7XXX8XXX9XXX · 2 holders which blocks → CENTURYTEL OF WASHINGTON, INC. DBA CENTURYLINK 2408 VADER WA
— 360-297 not yet reported which blocks → CENTURYTEL OF WASHINGTON, INC. DBA CENTURYLINK 2408 KINGSTON WA
— 360-327 7XXX8XXX · 2 holders which blocks → CENTURYTEL OF WASHINGTON, INC. DBA CENTURYLINK 2408 FORKS WA
— 360-374 not yet reported which blocks → CENTURYTEL OF WASHINGTON, INC. DBA CENTURYLINK 2408 FORKS WA
— 360-482 not yet reported which blocks → CENTURYTEL OF WASHINGTON, INC. DBA CENTURYLINK 2408 ELMA WA
— 360-492 0XXX1XXX2XXX4XXX6XXX7XXX8XXX9XXX · 7 holders which blocks → CENTURYTEL OF WASHINGTON, INC. DBA CENTURYLINK 2408 MORTON WA
— 360-494 1XXX9XXX · 2 holders which blocks → CENTURYTEL OF WASHINGTON, INC. DBA CENTURYLINK 2408 MORTON WA
— 360-495 1XXX5XXX6XXX7XXX8XXX9XXX · 3 holders which blocks → CENTURYTEL OF WASHINGTON, INC. DBA CENTURYLINK 2408 ELMA WA
— 360-496 1XXX4XXX8XXX which blocks → CENTURYTEL OF WASHINGTON, INC. DBA CENTURYLINK 2408 MORTON WA
— 360-497 none assigned yet which blocks → CENTURYTEL OF WASHINGTON, INC. DBA CENTURYLINK 2408 MORTON WA
— 360-498 1XXX7XXX8XXX · 3 holders which blocks → CENTURYTEL OF WASHINGTON, INC. DBA CENTURYLINK 2408 MORTON WA
— 360-569 1XXX3XXX4XXX5XXX7XXX9XXX · 3 holders which blocks → CENTURYTEL OF WASHINGTON, INC. DBA CENTURYLINK 2408 ASHFORD WA
— 360-638 3XXX4XXX5XXX6XXX8XXX · 5 holders which blocks → CENTURYTEL OF WASHINGTON, INC. DBA CENTURYLINK 2408 KINGSTON WA
— 360-642 not yet reported which blocks → CENTURYTEL OF WASHINGTON, INC. DBA CENTURYLINK 2408 LONG BEACH WA
— 360-645 none assigned yet which blocks → CENTURYTEL OF WASHINGTON, INC. DBA CENTURYLINK 2408 FORKS WA
— 360-648 3XXX4XXX5XXX6XXX7XXX8XXX9XXX · 4 holders which blocks → CENTURYTEL OF WASHINGTON, INC. DBA CENTURYLINK 2408 OCOSTA WA
— 360-665 7XXX8XXX which blocks → CENTURYTEL OF WASHINGTON, INC. DBA CENTURYLINK 2408 LONG BEACH WA
— 360-686 2XXX5XXX6XXX7XXX9XXX · 2 holders which blocks → CENTURYTEL OF WASHINGTON, INC. DBA CENTURYLINK 2408 YACOLT WA
— 360-777 1XXX2XXX3XXX4XXX5XXX6XXX7XXX9XXX · 4 holders which blocks → CENTURYTEL OF WASHINGTON, INC. DBA CENTURYLINK 2408 LONG BEACH WA
— 360-795 1XXX2XXX4XXX5XXX7XXX · 3 holders which blocks → CENTURYTEL OF WASHINGTON, INC. DBA CENTURYLINK 2408 CATHLAMET WA
— 360-849 0XXX1XXX2XXX5XXX6XXX7XXX8XXX9XXX · 4 holders which blocks → CENTURYTEL OF WASHINGTON, INC. DBA CENTURYLINK 2408 CATHLAMET WA
— 360-875 1XXX2XXX3XXX7XXX8XXX · 5 holders which blocks → CENTURYTEL OF WASHINGTON, INC. DBA CENTURYLINK 2408 SOUTH BEND WA
— 360-893 not yet reported which blocks → CENTURYTEL OF WASHINGTON, INC. DBA CENTURYLINK 2408 ORTING WA
— 360-897 4XXX5XXX7XXX · 3 holders which blocks → CENTURYTEL OF WASHINGTON, INC. DBA CENTURYLINK 2408 SO PRAIRIE WA
— 360-934 1XXX2XXX3XXX4XXX7XXX8XXX9XXX · 5 holders which blocks → CENTURYTEL OF WASHINGTON, INC. DBA CENTURYLINK 2408 SOUTH BEND WA
— 360-942 1XXX which blocks → CENTURYTEL OF WASHINGTON, INC. DBA CENTURYLINK 2408 SOUTH BEND WA
— 360-962 7XXX which blocks → CENTURYTEL OF WASHINGTON, INC. DBA CENTURYLINK 2408 FORKS WA
— 360-963 4XXX5XXX6XXX · 2 holders which blocks → CENTURYTEL OF WASHINGTON, INC. DBA CENTURYLINK 2408 FORKS WA
— 360-987 5XXX6XXX7XXX8XXX · 2 holders which blocks → CENTURYTEL OF WASHINGTON, INC. DBA CENTURYLINK 2408 LKQUINAULT WA

Source: NANPA CO Code Assignments (Utilized, All States, Public), file date 09/24/2026 — Tier A primary source, refreshed on every import. Viewing is free; bulk downloads require a membership.