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 253
ONVOY, LLC - WA 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
2023-04-14 253-379 1XXX7XXX · 2 holders which blocks → ONVOY, LLC - WA 483E ROY WA
2023-01-23 253-385 0–9 XXXall 10 · 3 holders which blocks → ONVOY, LLC - WA 483E GRAHAM WA
2023-01-10 253-362 0XXX1XXX2XXX3XXX4XXX7XXX8XXX9XXX · 5 holders which blocks → ONVOY, LLC - WA 483E SUMNER WA
2023-01-10 253-452 0–9 XXXall 10 · 6 holders which blocks → ONVOY, LLC - WA 483E KENT WA
2022-09-01 253-453 0–9 XXXall 10 · 4 holders which blocks → ONVOY, LLC - WA 483E TACOMAWVLY WA
2022-08-30 253-434 0–9 XXXall 10 · 4 holders which blocks → ONVOY, LLC - WA 483E PUYALLUP WA
2021-03-31 253-544 0–9 XXXall 10 · 2 holders which blocks → ONVOY, LLC - WA 483E PUYALLUP WA
2021-02-02 253-366 0–9 XXXall 10 · 3 holders which blocks → ONVOY, LLC - WA 483E TACOMA WA
2020-10-22 253-523 0–9 XXXall 10 · 4 holders which blocks → ONVOY, LLC - WA 483E TACOMAWVLY WA
2020-10-22 253-553 0–9 XXXall 10 · 6 holders which blocks → ONVOY, LLC - WA 483E AUBURN WA
2020-09-22 253-352 0–9 XXXall 10 · 2 holders which blocks → ONVOY, LLC - WA 483E TACOMA WA
2017-11-10 253-300 0–9 XXXall 10 · 3 holders which blocks → ONVOY, LLC - WA 483E TACOMA WA
2016-03-10 253-285 0–9 XXXall 10 · 5 holders which blocks → ONVOY, LLC - WA 483E AUBURN WA
2015-11-23 253-201 0–9 XXXwhole prefix which blocks → ONVOY, LLC - WA 483E TACOMA WA
2015-05-12 253-533 0–9 XXXall 10 · 6 holders which blocks → ONVOY, LLC - WA 483E TACOMA WA
2013-03-26 253-204 0–9 XXXall 10 · 5 holders which blocks → ONVOY, LLC - WA 483E AUBURN WA
2001-09-27 253-447 0XXX1XXX2XXX3XXX4XXX5XXX6XXX7XXX8XXX · 4 holders which blocks → ONVOY, LLC - WA 483E SUMNER WA
— 253-243 0XXX4XXX5XXX6XXX7XXX8XXX9XXX · 3 holders which blocks → ONVOY, LLC - WA 483E KENT WA
— 253-270 not yet reported which blocks → ONVOY, LLC - WA 483E KENT WA
— 253-276 not yet reported which blocks → ONVOY, LLC - WA 483E TACOMA WA
— 253-295 not yet reported which blocks → ONVOY, LLC - WA 483E TACOMA WA
— 253-322 not yet reported which blocks → ONVOY, LLC - WA 483E TACOMA WA
— 253-323 not yet reported which blocks → ONVOY, LLC - WA 483E TACOMA WA
— 253-369 not yet reported which blocks → ONVOY, LLC - WA 483E TACOMA WA
— 253-387 0XXX1XXX2XXX3XXX4XXX6XXX7XXX8XXX9XXX · 4 holders which blocks → ONVOY, LLC - WA 483E PUYALLUP WA
— 253-390 not yet reported which blocks → ONVOY, LLC - WA 483E TACOMA WA
— 253-399 not yet reported which blocks → ONVOY, LLC - WA 483E TACOMA WA
— 253-423 not yet reported which blocks → ONVOY, LLC - WA 483E TACOMA WA
— 253-461 not yet reported which blocks → ONVOY, LLC - WA 483E TACOMAWVLY WA
— 253-484 not yet reported which blocks → ONVOY, LLC - WA 483E TACOMA WA
— 253-498 not yet reported which blocks → ONVOY, LLC - WA 483E TACOMA WA
— 253-540 not yet reported which blocks → ONVOY, LLC - WA 483E TACOMA WA
— 253-541 not yet reported which blocks → ONVOY, LLC - WA 483E TACOMA WA
— 253-550 not yet reported which blocks → ONVOY, LLC - WA 483E TACOMA WA
— 253-559 not yet reported which blocks → ONVOY, LLC - WA 483E GRAHAM WA
— 253-563 not yet reported which blocks → ONVOY, LLC - WA 483E DES MOINES WA
— 253-595 not yet reported which blocks → ONVOY, LLC - WA 483E TACOMA WA
— 253-645 not yet reported which blocks → ONVOY, LLC - WA 483E ROY WA
— 253-648 not yet reported which blocks → ONVOY, LLC - WA 483E SUMNER WA
— 253-650 not yet reported which blocks → ONVOY, LLC - WA 483E TACOMA WA
— 253-660 not yet reported which blocks → ONVOY, LLC - WA 483E TACOMA WA
— 253-663 not yet reported which blocks → ONVOY, LLC - WA 483E TACOMA WA
— 253-669 not yet reported which blocks → ONVOY, LLC - WA 483E TACOMA WA
— 253-679 not yet reported which blocks → ONVOY, LLC - WA 483E TACOMA WA
— 253-780 0XXX1XXX2XXX3XXX4XXX5XXX6XXX7XXX8XXX · 5 holders which blocks → ONVOY, LLC - WA 483E GRAHAM WA
— 253-785 1XXX2XXX3XXX4XXX5XXX7XXX8XXX · 3 holders which blocks → ONVOY, LLC - WA 483E DES MOINES WA
— 253-793 not yet reported which blocks → ONVOY, LLC - WA 483E AUBURN WA
— 253-799 not yet reported which blocks → ONVOY, LLC - WA 483E PUYALLUP WA
— 253-802 1XXX2XXX3XXX4XXX5XXX6XXX7XXX8XXX · 3 holders which blocks → ONVOY, LLC - WA 483E AUBURN WA

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.