Recent prefix assignments

341 prefixes assigned in the last 30 days · from the daily NANPA CO code file, 09/26/2026

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

8X8, INC. 43

NEW CINGULAR WIRELESS PCS, LLC - DC 26

Rogers Communications Canada Inc. (Wireless) 23

NEW CINGULAR WIRELESS PCS, LLC - IL 22

ONVOY, LLC - CA 21

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
—	319-347	4XXX7XXX8XXX · 3 holders which blocks →	WINDSTREAM IOWA COMMUNICATIONS, INC. - SYSTEMS	1170	APLINGTON	IA
—	319-350	none assigned yet which blocks →	UNITED STATES CELLULAR - IA	6266	CEDAR RPDS	IA
—	319-351	not yet reported which blocks →	QWEST CORPORATION	9631	IOWA CITY	IA
—	319-352	not yet reported which blocks →	QWEST CORPORATION	9631	WAVERLY	IA
—	319-353	not yet reported which blocks →	QWEST CORPORATION	9631	IOWA CITY	IA
—	319-354	not yet reported which blocks →	QWEST CORPORATION	9631	IOWA CITY	IA
—	319-356	not yet reported which blocks →	QWEST CORPORATION	9631	IOWA CITY	IA
—	319-358	not yet reported which blocks →	QWEST CORPORATION	9631	IOWA CITY	IA
—	319-360	not yet reported which blocks →	CELLCO PARTNERSHIP DBA VERIZON WIRELESS - IA	6570	CEDAR RPDS	IA
—	319-361	none assigned yet which blocks →	UNITED STATES CELLULAR - IA	6266	CEDAR RPDS	IA
—	319-362	not yet reported which blocks →	QWEST CORPORATION	9631	CEDAR RPDS	IA
—	319-363	not yet reported which blocks →	QWEST CORPORATION	9631	CEDAR RPDS	IA
—	319-364	not yet reported which blocks →	QWEST CORPORATION	9631	CEDAR RPDS	IA
—	319-365	not yet reported which blocks →	QWEST CORPORATION	9631	CEDAR RPDS	IA
—	319-366	none assigned yet which blocks →	QWEST CORPORATION	9631	CEDAR RPDS	IA
—	319-367	3XXX4XXX8XXX9XXX · 3 holders which blocks →	WINDSTREAM IOWA COMMUNICATIONS, INC.	1178	NEW LONDON	IA
—	319-368	not yet reported which blocks →	QWEST CORPORATION	9631	CEDAR RPDS	IA
—	319-369	not yet reported which blocks →	QWEST CORPORATION	9631	CEDAR RPDS	IA
—	319-371	1XXX2XXX3XXX · 2 holders which blocks →	CELLCO PARTNERSHIP DBA VERIZON WIRELESS - IA	6570	FT MADISON	IA
—	319-372	not yet reported which blocks →	QWEST CORPORATION	9631	FT MADISON	IA
—	319-373	not yet reported which blocks →	QWEST CORPORATION	9631	CEDAR RPDS	IA
—	319-375	not yet reported which blocks →	QWEST CORPORATION	9631	CEDAR RPDS	IA
—	319-376	6XXX7XXX8XXX · 3 holders which blocks →	QWEST CORPORATION	9631	FT MADISON	IA
—	319-377	not yet reported which blocks →	QWEST CORPORATION	9631	CEDAR RPDS	IA
—	319-378	not yet reported which blocks →	QWEST CORPORATION	9631	CEDAR RPDS	IA
—	319-384	not yet reported which blocks →	QWEST CORPORATION	9631	IOWA CITY	IA
—	319-385	not yet reported which blocks →	WINDSTREAM IOWA COMMUNICATIONS, INC.	1178	MTPLEASANT	IA
—	319-389	not yet reported which blocks →	CELLCO PARTNERSHIP DBA VERIZON WIRELESS - IA	6570	CEDAR RPDS	IA
—	319-390	not yet reported which blocks →	QWEST CORPORATION	9631	CEDAR RPDS	IA
—	319-392	not yet reported which blocks →	DANVILLE MUTUAL TEL. CO.	1147	DANVILLE	IA
—	319-393	not yet reported which blocks →	QWEST CORPORATION	9631	CEDAR RPDS	IA
—	319-394	not yet reported which blocks →	MEDIAPOLIS TEL. CO.	1251	MEDIAPOLIS	IA
—	319-395	not yet reported which blocks →	QWEST CORPORATION	9631	CEDAR RPDS	IA
—	319-396	not yet reported which blocks →	QWEST CORPORATION	9631	CEDAR RPDS	IA
—	319-397	not yet reported which blocks →	VAN BUREN TEL. CO., INC.	1319	CANTRIL	IA
—	319-398	not yet reported which blocks →	QWEST CORPORATION	9631	CEDAR RPDS	IA
—	319-399	not yet reported which blocks →	QWEST CORPORATION	9631	CEDAR RPDS	IA
—	319-404	6XXX which blocks →	UNITED STATES CELLULAR - IA	6266	WATERLOO	IA
—	319-411	not yet reported which blocks →	MULTIPLE OCN LISTING	MULT	XXXXXXXXXX	IA
—	319-427	0–9 XXXall 10 · 4 holders which blocks →	CELLCO PARTNERSHIP DBA VERIZON WIRELESS - IA	6570	WATERLOO	IA
—	319-430	none assigned yet which blocks →	UNITED STATES CELLULAR - IA	6266	IOWA CITY	IA
—	319-431	none assigned yet which blocks →	T-MOBILE USA, INC.	6529	CEDAR RPDS	IA
—	319-433	5XXX8XXX which blocks →	PAETEC ITEL, LLC	829J	WATERLOO	IA
—	319-434	not yet reported which blocks →	SHELLSBURG CABLEVISION, INC.	4189	BELLEPLAIN	IA
—	319-435	0XXX1XXX3XXX4XXX5XXX6XXX7XXX8XXX9XXX · 2 holders which blocks →	QWEST CORPORATION	9631	COGGON	IA
—	319-436	not yet reported which blocks →	FARMERS MUTUAL TEL. CO.	1173	SHELLSBURG	IA
—	319-437	not yet reported which blocks →	PRAIRIEBURG TEL. CO., INC.	1275	PRAIRIEBG	IA
—	319-438	2XXX3XXX4XXX5XXX7XXX · 3 holders which blocks →	WINDSTREAM IOWA COMMUNICATIONS, INC. - NORTH	1167	CENTRAL CY	IA
—	319-439	not yet reported which blocks →	KEYSTONE FARMS COOP. TEL. CO.	1217	ELBERON	IA
—	319-440	1XXX2XXX3XXX8XXX9XXX which blocks →	CELLCO PARTNERSHIP DBA VERIZON WIRELESS - IA	6570	CEDAR RPDS	IA

Source: NANPA CO Code Assignments (Utilized, All States, Public), file date 09/26/2026 — Tier A primary source, refreshed on every import. Viewing is free; bulk downloads require a membership.