Recent prefix assignments

0 prefixes assigned in the last 30 days · from the daily NANPA CO code file, 09/21/2026

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 619

U.S. TELEPACIFIC CORP. DBA TPX COMMUNICATIONS 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
2022-05-26	619-803	0–9 XXXall 10 · 6 holders which blocks →	U.S. TELEPACIFIC CORP. DBA TPX COMMUNICATIONS	671J	SNDG SNDG	CA
2022-05-26	619-812	0–9 XXXall 10 · 3 holders which blocks →	U.S. TELEPACIFIC CORP. DBA TPX COMMUNICATIONS	671J	LA JOLLA	CA
2006-01-18	619-609	0–9 XXXall 10 · 5 holders which blocks →	U.S. TELEPACIFIC CORP. DBA TPX COMMUNICATIONS	671J	LA MESA	CA
2001-01-25	619-345	0XXX1XXX3XXX4XXX5XXX6XXX7XXX8XXX · 4 holders which blocks →	U.S. TELEPACIFIC CORP. DBA TPX COMMUNICATIONS	671J	DULZURA	CA
—	619-308	0XXX1XXX4XXX5XXX6XXX9XXX · 3 holders which blocks →	U.S. TELEPACIFIC CORP. DBA TPX COMMUNICATIONS	671J	SNDG SNDG	CA
—	619-325	6XXX7XXX8XXX9XXX · 4 holders which blocks →	U.S. TELEPACIFIC CORP. DBA TPX COMMUNICATIONS	671J	SNDG SNDG	CA
—	619-326	3XXX4XXX6XXX7XXX8XXX9XXX · 4 holders which blocks →	U.S. TELEPACIFIC CORP. DBA TPX COMMUNICATIONS	671J	SNDG SNDG	CA
—	619-350	0XXX1XXX2XXX3XXX4XXX5XXX6XXX7XXX8XXX · 3 holders which blocks →	U.S. TELEPACIFIC CORP. DBA TPX COMMUNICATIONS	671J	JACUMBA	CA
—	619-387	0XXX1XXX3XXX4XXX5XXX6XXX7XXX8XXX9XXX · 5 holders which blocks →	U.S. TELEPACIFIC CORP. DBA TPX COMMUNICATIONS	671J	EL CAJON	CA
—	619-388	3XXX4XXX5XXX6XXX7XXX9XXX · 2 holders which blocks →	U.S. TELEPACIFIC CORP. DBA TPX COMMUNICATIONS	671J	LA MESA	CA
—	619-398	5XXX6XXX7XXX which blocks →	U.S. TELEPACIFIC CORP. DBA TPX COMMUNICATIONS	671J	SNDG SNDG	CA
—	619-433	2XXX4XXX5XXX6XXX7XXX8XXX9XXX · 2 holders which blocks →	U.S. TELEPACIFIC CORP. DBA TPX COMMUNICATIONS	671J	LA MESA	CA
—	619-554	0XXX2XXX3XXX4XXX5XXX6XXX7XXX8XXX · 6 holders which blocks →	U.S. TELEPACIFIC CORP. DBA TPX COMMUNICATIONS	671J	CORONADO	CA
—	619-591	3XXX4XXX5XXX6XXX7XXX8XXX9XXX · 4 holders which blocks →	U.S. TELEPACIFIC CORP. DBA TPX COMMUNICATIONS	671J	CHULAVISTA	CA
—	619-631	1XXX2XXX3XXX4XXX5XXX6XXX7XXX8XXX9XXX · 7 holders which blocks →	U.S. TELEPACIFIC CORP. DBA TPX COMMUNICATIONS	671J	EL CAJON	CA
—	619-719	0XXX1XXX5XXX9XXX · 3 holders which blocks →	U.S. TELEPACIFIC CORP. DBA TPX COMMUNICATIONS	671J	SNDG SNDG	CA
—	619-734	0XXX1XXX3XXX4XXX5XXX6XXX7XXX8XXX9XXX · 4 holders which blocks →	U.S. TELEPACIFIC CORP. DBA TPX COMMUNICATIONS	671J	CHULAVISTA	CA
—	619-773	0XXX3XXX4XXX5XXX6XXX7XXX · 5 holders which blocks →	U.S. TELEPACIFIC CORP. DBA TPX COMMUNICATIONS	671J	NATIONALCY	CA
—	619-797	0XXX4XXX5XXX6XXX7XXX8XXX · 4 holders which blocks →	U.S. TELEPACIFIC CORP. DBA TPX COMMUNICATIONS	671J	LA MESA	CA
—	619-814	not yet reported which blocks →	U.S. TELEPACIFIC CORP. DBA TPX COMMUNICATIONS	671J	SNDG SNDG	CA
—	619-827	0–9 XXXall 10 · 3 holders which blocks →	U.S. TELEPACIFIC CORP. DBA TPX COMMUNICATIONS	671J	CHULAVISTA	CA
—	619-841	0–9 XXXall 10 · 5 holders which blocks →	U.S. TELEPACIFIC CORP. DBA TPX COMMUNICATIONS	671J	CORONADO	CA
—	619-873	4XXX5XXX6XXX7XXX8XXX · 3 holders which blocks →	U.S. TELEPACIFIC CORP. DBA TPX COMMUNICATIONS	671J	EL CAJON	CA
—	619-961	0XXX3XXX5XXX6XXX7XXX8XXX9XXX · 2 holders which blocks →	U.S. TELEPACIFIC CORP. DBA TPX COMMUNICATIONS	671J	SNDG SNDG	CA

Source: NANPA CO Code Assignments (Utilized, All States, Public), file date 09/21/2026 — Tier A primary source, refreshed on every import. Viewing is free; bulk downloads require a membership.