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 909

LEVEL 3 TELECOM OF CALIFORNIA, LP - CA 24

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
2007-03-13	909-733	0–9 XXXall 10 · 3 holders which blocks →	LEVEL 3 TELECOM OF CALIFORNIA, LP - CA	7718	S BERNDINO	CA
2007-02-05	909-204	0–9 XXXall 10 · 5 holders which blocks →	LEVEL 3 TELECOM OF CALIFORNIA, LP - CA	7718	UPLAND	CA
2006-07-26	909-651	0–9 XXXwhole prefix which blocks →	LEVEL 3 TELECOM OF CALIFORNIA, LP - CA	7718	REDLANDS	CA
—	909-267	0XXX3XXX4XXX5XXX6XXX7XXX8XXX9XXX · 5 holders which blocks →	LEVEL 3 TELECOM OF CALIFORNIA, LP - CA	7718	CLAREMONT	CA
—	909-282	0XXX2XXX3XXX4XXX5XXX6XXX7XXX8XXX9XXX · 3 holders which blocks →	LEVEL 3 TELECOM OF CALIFORNIA, LP - CA	7718	POMONA	CA
—	909-297	0XXX1XXX3XXX4XXX5XXX6XXX7XXX8XXX9XXX · 4 holders which blocks →	LEVEL 3 TELECOM OF CALIFORNIA, LP - CA	7718	UPLAND	CA
—	909-348	0XXX2XXX3XXX4XXX5XXX6XXX7XXX8XXX9XXX · 5 holders which blocks →	LEVEL 3 TELECOM OF CALIFORNIA, LP - CA	7718	DIAMONDBAR	CA
—	909-366	0XXX2XXX3XXX4XXX5XXX6XXX8XXX9XXX · 7 holders which blocks →	LEVEL 3 TELECOM OF CALIFORNIA, LP - CA	7718	BIGBEAR LK	CA
—	909-379	2XXX3XXX4XXX5XXX8XXX9XXX · 2 holders which blocks →	LEVEL 3 TELECOM OF CALIFORNIA, LP - CA	7718	S BERNDINO	CA
—	909-419	0XXX1XXX2XXX3XXX4XXX5XXX6XXX7XXX9XXX · 5 holders which blocks →	LEVEL 3 TELECOM OF CALIFORNIA, LP - CA	7718	RIALTO	CA
—	909-456	0XXX4XXX5XXX6XXX9XXX · 3 holders which blocks →	LEVEL 3 TELECOM OF CALIFORNIA, LP - CA	7718	ONTARIO	CA
—	909-547	0XXX2XXX3XXX4XXX5XXX6XXX7XXX8XXX9XXX · 5 holders which blocks →	LEVEL 3 TELECOM OF CALIFORNIA, LP - CA	7718	BIGBEAR CY	CA
—	909-583	0XXX1XXX3XXX4XXX5XXX7XXX8XXX9XXX · 5 holders which blocks →	LEVEL 3 TELECOM OF CALIFORNIA, LP - CA	7718	REDLANDS	CA
—	909-646	0XXX2XXX3XXX4XXX5XXX6XXX7XXX8XXX9XXX · 6 holders which blocks →	LEVEL 3 TELECOM OF CALIFORNIA, LP - CA	7718	ETIWANDA	CA
—	909-705	0XXX2XXX3XXX4XXX5XXX6XXX7XXX8XXX9XXX · 5 holders which blocks →	LEVEL 3 TELECOM OF CALIFORNIA, LP - CA	7718	MENTONE	CA
—	909-726	0XXX1XXX2XXX3XXX4XXX5XXX7XXX8XXX9XXX · 6 holders which blocks →	LEVEL 3 TELECOM OF CALIFORNIA, LP - CA	7718	MARSHALL	CA
—	909-742	0XXX2XXX4XXX5XXX6XXX7XXX8XXX9XXX · 5 holders which blocks →	LEVEL 3 TELECOM OF CALIFORNIA, LP - CA	7718	HIGHLAND	CA
—	909-744	0XXX2XXX3XXX4XXX5XXX6XXX7XXX8XXX9XXX · 5 holders which blocks →	LEVEL 3 TELECOM OF CALIFORNIA, LP - CA	7718	ARROWHEAD	CA
—	909-770	0XXX2XXX3XXX4XXX5XXX6XXX7XXX8XXX9XXX · 5 holders which blocks →	LEVEL 3 TELECOM OF CALIFORNIA, LP - CA	7718	FONTANA	CA
—	909-771	0XXX1XXX3XXX4XXX5XXX6XXX7XXX8XXX9XXX · 3 holders which blocks →	LEVEL 3 TELECOM OF CALIFORNIA, LP - CA	7718	S BERNDINO	CA
—	909-835	0XXX2XXX3XXX4XXX5XXX6XXX7XXX8XXX9XXX · 2 holders which blocks →	LEVEL 3 TELECOM OF CALIFORNIA, LP - CA	7718	COLTON	CA
—	909-912	0XXX2XXX4XXX5XXX6XXX8XXX9XXX · 3 holders which blocks →	LEVEL 3 TELECOM OF CALIFORNIA, LP - CA	7718	UPLAND	CA
—	909-918	0XXX2XXX3XXX4XXX5XXX6XXX7XXX8XXX9XXX · 6 holders which blocks →	LEVEL 3 TELECOM OF CALIFORNIA, LP - CA	7718	CALIMESA	CA
—	909-993	0XXX2XXX3XXX4XXX5XXX6XXX7XXX8XXX · 5 holders which blocks →	LEVEL 3 TELECOM OF CALIFORNIA, LP - CA	7718	CHINO	CA

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.