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 281

LEVEL 3 OF TELECOM OF TEXAS, LLC - TX 26

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
2010-04-22	281-887	0–9 XXXwhole prefix which blocks →	LEVEL 3 OF TELECOM OF TEXAS, LLC - TX	7074	SATSUMA	TX
2009-03-18	281-737	0–9 XXXwhole prefix which blocks →	LEVEL 3 OF TELECOM OF TEXAS, LLC - TX	7074	SATSUMA	TX
—	281-207	6XXX8XXX9XXX · 2 holders which blocks →	LEVEL 3 OF TELECOM OF TEXAS, LLC - TX	7074	SUGAR LAND	TX
—	281-210	4XXX6XXX7XXX8XXX9XXX which blocks →	LEVEL 3 OF TELECOM OF TEXAS, LLC - TX	7074	SPRING	TX
—	281-241	1XXX3XXX4XXX5XXX6XXX7XXX8XXX9XXX · 5 holders which blocks →	LEVEL 3 OF TELECOM OF TEXAS, LLC - TX	7074	DEER PARK	TX
—	281-245	0XXX1XXX3XXX4XXX5XXX6XXX7XXX8XXX9XXX · 4 holders which blocks →	LEVEL 3 OF TELECOM OF TEXAS, LLC - TX	7074	ALVIN	TX
—	281-569	4XXX9XXX · 2 holders which blocks →	LEVEL 3 OF TELECOM OF TEXAS, LLC - TX	7074	BAMMEL	TX
—	281-570	2XXX3XXX4XXX5XXX6XXX7XXX8XXX9XXX · 2 holders which blocks →	LEVEL 3 OF TELECOM OF TEXAS, LLC - TX	7074	HUMBLE	TX
—	281-582	not yet reported which blocks →	LEVEL 3 OF TELECOM OF TEXAS, LLC - TX	7074	HSTNSUBURB	TX
—	281-653	2XXX3XXX4XXX6XXX7XXX8XXX9XXX · 5 holders which blocks →	LEVEL 3 OF TELECOM OF TEXAS, LLC - TX	7074	SATSUMA	TX
—	281-769	1XXX2XXX3XXX4XXX5XXX6XXX7XXX8XXX9XXX · 4 holders which blocks →	LEVEL 3 OF TELECOM OF TEXAS, LLC - TX	7074	KATY	TX
—	281-781	2XXX3XXX4XXX5XXX6XXX7XXX8XXX9XXX · 3 holders which blocks →	LEVEL 3 OF TELECOM OF TEXAS, LLC - TX	7074	BAMMEL	TX
—	281-783	2XXX3XXX4XXX5XXX6XXX7XXX8XXX9XXX · 3 holders which blocks →	LEVEL 3 OF TELECOM OF TEXAS, LLC - TX	7074	SHELDON	TX
—	281-816	1XXX3XXX4XXX5XXX6XXX7XXX8XXX9XXX · 4 holders which blocks →	LEVEL 3 OF TELECOM OF TEXAS, LLC - TX	7074	FRIENDSWD	TX
—	281-823	2XXX7XXX8XXX9XXX · 2 holders which blocks →	LEVEL 3 OF TELECOM OF TEXAS, LLC - TX	7074	APOLLO	TX
—	281-845	1XXX2XXX3XXX4XXX6XXX7XXX8XXX9XXX · 3 holders which blocks →	LEVEL 3 OF TELECOM OF TEXAS, LLC - TX	7074	ARCOLA	TX
—	281-849	1XXX3XXX4XXX6XXX7XXX8XXX9XXX which blocks →	LEVEL 3 OF TELECOM OF TEXAS, LLC - TX	7074	LANGHAMCRK	TX
—	281-854	4XXX5XXX7XXX8XXX9XXX which blocks →	LEVEL 3 OF TELECOM OF TEXAS, LLC - TX	7074	HSTNSUBURB	TX
—	281-869	1XXX2XXX3XXX4XXX6XXX7XXX8XXX9XXX · 5 holders which blocks →	LEVEL 3 OF TELECOM OF TEXAS, LLC - TX	7074	WESTFIELD	TX
—	281-883	2XXX3XXX4XXX6XXX7XXX8XXX9XXX · 2 holders which blocks →	LEVEL 3 OF TELECOM OF TEXAS, LLC - TX	7074	HUMBLE	TX
—	281-902	2XXX6XXX7XXX8XXX9XXX which blocks →	LEVEL 3 OF TELECOM OF TEXAS, LLC - TX	7074	HSTNSUBURB	TX
—	281-921	not yet reported which blocks →	LEVEL 3 OF TELECOM OF TEXAS, LLC - TX	7074	HSTNSUBURB	TX
—	281-941	2XXX3XXX4XXX5XXX6XXX7XXX8XXX9XXX · 5 holders which blocks →	LEVEL 3 OF TELECOM OF TEXAS, LLC - TX	7074	LA PORTE	TX
—	281-943	3XXX4XXX6XXX7XXX8XXX9XXX · 3 holders which blocks →	LEVEL 3 OF TELECOM OF TEXAS, LLC - TX	7074	BAMMEL	TX
—	281-944	1XXX3XXX4XXX5XXX6XXX7XXX8XXX9XXX · 5 holders which blocks →	LEVEL 3 OF TELECOM OF TEXAS, LLC - TX	7074	BARKER	TX
—	281-994	3XXX6XXX7XXX8XXX9XXX · 3 holders which blocks →	LEVEL 3 OF TELECOM OF TEXAS, LLC - TX	7074	BARKER	TX

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.