Recent prefix assignments

7 prefixes assigned in the last 30 days · from the daily NANPA CO code file, 09/27/2026

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, last 30 days — NPA 357

ONVOY, LLC - CA 4

WIDE VOICE, LLC - CA 1

OPENTACT INC. 1

EXIANT COMMUNICATIONS LLC 1

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

Recent NPA-NXX prefix assignments
Assigned	NPA-NXX	Thousands-blocks taken (last-4 opening)	Code holder	OCN	Rate center	State
2026-09-21	357-666	2XXX3XXX6XXX which blocks →	ONVOY, LLC - CA	649C	SANGER	CA
2026-09-18	357-222	2XXX3XXX4XXX which blocks →	ONVOY, LLC - CA	649C	KINGSBURG	CA
2026-09-18	357-333	0XXX1XXX2XXX3XXX which blocks →	ONVOY, LLC - CA	649C	FIREBAUGH	CA
2026-09-18	357-444	0XXX1XXX2XXX4XXX which blocks →	ONVOY, LLC - CA	649C	CLOVIS	CA
2026-09-18	357-777	7XXX8XXX which blocks →	WIDE VOICE, LLC - CA	252F	HANFORD	CA
2026-09-18	357-888	8XXX which blocks →	OPENTACT INC.	824J	FRESNO	CA
2026-09-18	357-999	9XXX which blocks →	EXIANT COMMUNICATIONS LLC	114J	VISALIA	CA
—	357-211	not yet reported which blocks →	MULTIPLE OCN LISTING	MULT	XXXXXXXXXX	CA
—	357-311	not yet reported which blocks →	MULTIPLE OCN LISTING	MULT	XXXXXXXXXX	CA
—	357-411	not yet reported which blocks →	MULTIPLE OCN LISTING	MULT	XXXXXXXXXX	CA
—	357-511	not yet reported which blocks →	MULTIPLE OCN LISTING	MULT	XXXXXXXXXX	CA
—	357-555	not yet reported which blocks →	MULTIPLE OCN LISTING	MULT	DIR ASST	CA
—	357-611	not yet reported which blocks →	MULTIPLE OCN LISTING	MULT	XXXXXXXXXX	CA
—	357-700	not yet reported which blocks →	MULTIPLE OCN LISTING	MULT	XXXXXXXXXX	CA
—	357-711	not yet reported which blocks →	MULTIPLE OCN LISTING	MULT	XXXXXXXXXX	CA
—	357-811	not yet reported which blocks →	MULTIPLE OCN LISTING	MULT	XXXXXXXXXX	CA
—	357-911	not yet reported which blocks →	MULTIPLE OCN LISTING	MULT	XXXXXXXXXX	CA
—	357-950	not yet reported which blocks →	MULTIPLE OCN LISTING	MULT	XXXXXXXXXX	CA
—	357-958	not yet reported which blocks →	MULTIPLE OCN LISTING	MULT	XXXXXXXXXX	CA
—	357-959	not yet reported which blocks →	MULTIPLE OCN LISTING	MULT	XXXXXXXXXX	CA
—	357-976	not yet reported which blocks →	MULTIPLE OCN LISTING	MULT	XXXXXXXXXX	CA

Source: NANPA CO Code Assignments (Utilized, All States, Public), file date 09/27/2026 — Tier A primary source, refreshed on every import. Viewing is free; bulk downloads require a membership.