NumberResearch Membership · Data 09/26/2026

Recent prefix assignments

0 prefixes assigned in the last 30 days · from the daily NANPA CO code file, 09/26/2026

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 541
CENTURYTEL OF OREGON, INC. DBA CENTURYLINK 53
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
— 541-258 9XXX which blocks → CENTURYTEL OF OREGON, INC. DBA CENTURYLINK 2395 LEBANON OR
— 541-259 9XXX which blocks → CENTURYTEL OF OREGON, INC. DBA CENTURYLINK 2395 LEBANON OR
— 541-328 2XXX which blocks → CENTURYTEL OF OREGON, INC. DBA CENTURYLINK 2360 PINE GROVE OR
— 541-353 not yet reported which blocks → CENTURYTEL OF OREGON, INC. DBA CENTURYLINK 2360 BLY OR
— 541-356 not yet reported which blocks → CENTURYTEL OF OREGON, INC. DBA CENTURYLINK 2360 ROCKYPOINT OR
— 541-365 not yet reported which blocks → CENTURYTEL OF OREGON, INC. DBA CENTURYLINK 2360 CHEMULT OR
— 541-367 not yet reported which blocks → CENTURYTEL OF OREGON, INC. DBA CENTURYLINK 2395 SWEET HOME OR
— 541-376 2XXX3XXX4XXX6XXX7XXX9XXX · 4 holders which blocks → CENTURYTEL OF OREGON, INC. DBA CENTURYLINK 2360 ECHO OR
— 541-381 3XXX which blocks → CENTURYTEL OF OREGON, INC. DBA CENTURYLINK 2360 FT KLAMATH OR
— 541-395 0XXX1XXX3XXX4XXX5XXX6XXX7XXX8XXX9XXX · 4 holders which blocks → CENTURYTEL OF OREGON, INC. DBA CENTURYLINK 2360 MAUPIN OR
— 541-421 not yet reported which blocks → CENTURYTEL OF OREGON, INC. DBA CENTURYLINK 2360 LONG CREEK OR
— 541-422 2XXX3XXX4XXX5XXX6XXX8XXX9XXX · 2 holders which blocks → CENTURYTEL OF OREGON, INC. DBA CENTURYLINK 2360 IONE OR
— 541-427 0XXX1XXX2XXX4XXX5XXX6XXX7XXX8XXX9XXX · 3 holders which blocks → CENTURYTEL OF OREGON, INC. DBA CENTURYLINK 2360 UKIAH OR
— 541-428 not yet reported which blocks → CENTURYTEL OF OREGON, INC. DBA CENTURYLINK 2360 PILOT ROCK OR
— 541-433 not yet reported which blocks → CENTURYTEL OF OREGON, INC. DBA CENTURYLINK 2360 GILCHRIST OR
— 541-443 not yet reported which blocks → CENTURYTEL OF OREGON, INC. DBA CENTURYLINK 2360 PILOT ROCK OR
— 541-445 8XXX which blocks → CENTURYTEL OF OREGON, INC. DBA CENTURYLINK 2360 CAMAS VLY OR
— 541-451 0XXX9XXX · 2 holders which blocks → CENTURYTEL OF OREGON, INC. DBA CENTURYLINK 2395 LEBANON OR
— 541-462 not yet reported which blocks → CENTURYTEL OF OREGON, INC. DBA CENTURYLINK 2360 MITCHELL OR
— 541-466 7XXX which blocks → CENTURYTEL OF OREGON, INC. DBA CENTURYLINK 2395 BROWNSVL OR
— 541-468 5XXX8XXX · 2 holders which blocks → CENTURYTEL OF OREGON, INC. DBA CENTURYLINK 2360 SPRAY OR
— 541-477 2XXX which blocks → CENTURYTEL OF OREGON, INC. DBA CENTURYLINK 2360 PAULINA OR
— 541-481 not yet reported which blocks → CENTURYTEL OF OREGON, INC. DBA CENTURYLINK 2360 BOARDMAN OR
— 541-483 not yet reported which blocks → CENTURYTEL OF OREGON, INC. DBA CENTURYLINK 2360 TYGHVALLEY OR
— 541-491 6XXX7XXX · 2 holders which blocks → CENTURYTEL OF OREGON, INC. DBA CENTURYLINK 2360 SHEDD OR
— 541-493 not yet reported which blocks → CENTURYTEL OF OREGON, INC. DBA CENTURYLINK 2360 NO HARNEY OR
— 541-495 not yet reported which blocks → CENTURYTEL OF OREGON, INC. DBA CENTURYLINK 2360 SO HARNEY OR
— 541-496 not yet reported which blocks → CENTURYTEL OF OREGON, INC. DBA CENTURYLINK 2360 GLIDE OR
— 541-498 1XXX which blocks → CENTURYTEL OF OREGON, INC. DBA CENTURYLINK 2360 NO UMPQUA OR
— 541-533 not yet reported which blocks → CENTURYTEL OF OREGON, INC. DBA CENTURYLINK 2360 SPRAGUERIV OR
— 541-542 6XXX7XXX8XXX · 2 holders which blocks → CENTURYTEL OF OREGON, INC. DBA CENTURYLINK 2360 SENECA OR
— 541-544 4XXX7XXX · 2 holders which blocks → CENTURYTEL OF OREGON, INC. DBA CENTURYLINK 2360 WAMIC OR
— 541-545 not yet reported which blocks → CENTURYTEL OF OREGON, INC. DBA CENTURYLINK 2360 BONANZA OR
— 541-573 9XXX which blocks → CENTURYTEL OF OREGON, INC. DBA CENTURYLINK 2360 BURNS OR
— 541-575 not yet reported which blocks → CENTURYTEL OF OREGON, INC. DBA CENTURYLINK 2360 JOHN DAY OR
— 541-576 0XXX1XXX4XXX6XXX7XXX8XXX9XXX · 3 holders which blocks → CENTURYTEL OF OREGON, INC. DBA CENTURYLINK 2360 SILVERLAKE OR
— 541-676 not yet reported which blocks → CENTURYTEL OF OREGON, INC. DBA CENTURYLINK 2360 HEPPNER OR
— 541-723 1XXX which blocks → CENTURYTEL OF OREGON, INC. DBA CENTURYLINK 2360 MALIN OR
— 541-763 5XXX which blocks → CENTURYTEL OF OREGON, INC. DBA CENTURYLINK 2360 FOSSIL OR
— 541-764 1XXX6XXX7XXX8XXX9XXX · 2 holders which blocks → CENTURYTEL OF OREGON, INC. DBA CENTURYLINK 2395 DEPOE BAY OR
— 541-765 1XXX5XXX6XXX8XXX9XXX · 3 holders which blocks → CENTURYTEL OF OREGON, INC. DBA CENTURYLINK 2395 DEPOE BAY OR
— 541-783 8XXX which blocks → CENTURYTEL OF OREGON, INC. DBA CENTURYLINK 2360 CHILOQUIN OR
— 541-798 not yet reported which blocks → CENTURYTEL OF OREGON, INC. DBA CENTURYLINK 2360 MERRILL OR
— 541-836 not yet reported which blocks → CENTURYTEL OF OREGON, INC. DBA CENTURYLINK 2360 DRAIN OR
— 541-849 not yet reported which blocks → CENTURYTEL OF OREGON, INC. DBA CENTURYLINK 2395 YONCALLA OR
— 541-869 not yet reported which blocks → CENTURYTEL OF OREGON, INC. DBA CENTURYLINK 2360 HUNTINGTON OR
— 541-877 not yet reported which blocks → CENTURYTEL OF OREGON, INC. DBA CENTURYLINK 2360 DURKEE OR
— 541-895 not yet reported which blocks → CENTURYTEL OF OREGON, INC. DBA CENTURYLINK 2395 CRESWELL OR
— 541-898 not yet reported which blocks → CENTURYTEL OF OREGON, INC. DBA CENTURYLINK 2360 NO POWDER OR
— 541-934 not yet reported which blocks → CENTURYTEL OF OREGON, INC. DBA CENTURYLINK 2360 MONUMENT OR

Source: NANPA CO Code Assignments (Utilized, All States, Public), file date 09/26/2026 — Tier A primary source, refreshed on every import. Viewing is free; bulk downloads require a membership.