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 406

QWEST CORPORATION 132

CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MT 119

NEW CINGULAR WIRELESS PCS, LLC 74

ONVOY, LLC - MT 43

TRIANGLE TEL. COOP. ASSN., INC. 39

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
—	406-887	1XXX4XXX5XXX6XXX7XXX8XXX9XXX · 6 holders which blocks →	CENTURYTEL OF MONTANA, INC. DBA CENTURYLINK	2249	FINLEY PT	MT
—	406-888	0XXX1XXX2XXX3XXX4XXX6XXX8XXX · 4 holders which blocks →	QWEST CORPORATION	9636	W GLACIER	MT
—	406-889	not yet reported which blocks →	INTERBEL TEL. COOP., INC.	2242	EUREKARURL	MT
—	406-890	0–9 XXXall 10 · 3 holders which blocks →	CHARTER IP ENABLED SERVICES, LLC	792K	KALISPELL	MT
—	406-891	2XXX4XXX · 2 holders which blocks →	NEW CINGULAR WIRELESS PCS, LLC	6010	BAKER	MT
—	406-892	not yet reported which blocks →	CENTURYTEL OF MONTANA, INC. DBA CENTURYLINK	2249	COLUMBIFLS	MT
—	406-893	none assigned yet which blocks →	NEMONT TEL COOP INC	2247	PEERLESS	MT
—	406-894	0–9 XXXall 10 · 6 holders which blocks →	COMMIO, LLC	939H	BILLINGS	MT
—	406-895	none assigned yet which blocks →	NEMONT TEL COOP INC	2247	OUTLOOK	MT
—	406-896	not yet reported which blocks →	QWEST CORPORATION	9636	BILLINGS	MT
—	406-897	0–9 XXXall 10 · 5 holders which blocks →	CHARTER IP ENABLED SERVICES, LLC	792K	COLUMBIFLS	MT
—	406-899	not yet reported which blocks →	NEW CINGULAR WIRELESS PCS, LLC	6010	GREATFALLS	MT
—	406-911	not yet reported which blocks →	MULTIPLE OCN LISTING	MULT	XXXXXXXXXX	MT
—	406-913	1XXX which blocks →	CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MT	6564	ROUNDUP	MT
—	406-914	3XXX which blocks →	CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MT	6564	LAMBERT	MT
—	406-915	none assigned yet which blocks →	CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MT	6564	SO WOLF PT	MT
—	406-920	2XXX3XXX4XXX5XXX6XXX7XXX8XXX9XXX · 5 holders which blocks →	CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MT	6564	BOZEMAN	MT
—	406-922	4XXX7XXX8XXX9XXX · 3 holders which blocks →	ELECTRIC LIGHTWAVE LLC DBA ALLSTREAM	4222	BOZEMAN	MT
—	406-923	3XXX8XXX9XXX · 2 holders which blocks →	COMMIO, LLC	939H	GREATFALLS	MT
—	406-925	5XXX6XXX7XXX · 3 holders which blocks →	CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MT	6564	DILLON	MT
—	406-928	none assigned yet which blocks →	CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MT	6564	GRASSRANGE	MT
—	406-930	3XXX4XXX5XXX6XXX7XXX9XXX · 2 holders which blocks →	CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MT	6564	BIG TIMBER	MT
—	406-931	1XXX9XXX · 2 holders which blocks →	CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MT	6564	BIG TIMBER	MT
—	406-932	7XXX which blocks →	TRIANGLE TEL. COOP. ASSN., INC.	2257	BIG TIMBER	MT
—	406-933	3XXX4XXX which blocks →	QWEST CORPORATION	9636	HELENA	MT
—	406-934	1XXX8XXX · 2 holders which blocks →	WIDE VOICE, LLC - MT	743G	MILES CITY	MT
—	406-935	2XXX3XXX5XXX · 2 holders which blocks →	CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MT	6564	BROADUS	MT
—	406-937	not yet reported which blocks →	NORTHERN TEL. COOP., INC.	2248	SUNBURST	MT
—	406-938	3XXX7XXX · 2 holders which blocks →	CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MT	6564	ALZADA	MT
—	406-939	8XXX9XXX · 2 holders which blocks →	CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MT	6564	W GLENDIVE	MT
—	406-941	1XXX2XXX3XXX · 2 holders which blocks →	CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MT	6564	W GLENDIVE	MT
—	406-945	7XXX8XXX9XXX · 3 holders which blocks →	NEW CINGULAR WIRELESS PCS, LLC	6010	HAVRE	MT
—	406-947	not yet reported which blocks →	MID-RIVERS TEL. COOP., INC.	2246	MUSSELSHLL	MT
—	406-949	4XXX9XXX which blocks →	NEW CINGULAR WIRELESS PCS, LLC	6010	TOWNSEND	MT
—	406-950	not yet reported which blocks →				MT
—	406-951	7XXX8XXX9XXX · 2 holders which blocks →	NEW CINGULAR WIRELESS PCS, LLC	6010	MILES CITY	MT
—	406-952	0–9 XXXall 10 · 3 holders which blocks →	ONVOY SPECTRUM, LLC	624H	GREATFALLS	MT
—	406-953	1XXX2XXX3XXX5XXX6XXX7XXX8XXX9XXX · 4 holders which blocks →	SAGEBRUSH CELLULAR, INC.	443B	HARDIN	MT
—	406-954	2XXX which blocks →	CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MT	6564	ROY	MT
—	406-957	1XXX2XXX3XXX6XXX7XXX · 3 holders which blocks →	CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MT	6564	TERRY	MT
—	406-958	not yet reported which blocks →				MT
—	406-959	not yet reported which blocks →				MT
—	406-961	2XXX6XXX7XXX9XXX · 4 holders which blocks →	QWEST CORPORATION	9636	HAMILTON	MT
—	406-962	0XXX1XXX2XXX5XXX6XXX7XXX · 4 holders which blocks →	QWEST CORPORATION	9636	JOLIET	MT
—	406-963	none assigned yet which blocks →	NEMONT TEL COOP INC	2247	FROIDRURAL	MT
—	406-964	2XXX3XXX4XXX5XXX6XXX7XXX9XXX · 3 holders which blocks →	QWEST CORPORATION	9636	GREATFALLS	MT
—	406-965	1XXX which blocks →	AIRUS, INC. - MT	588H	GREATFALLS	MT
—	406-967	1XXX5XXX · 2 holders which blocks →	PROJECT TEL. CO., INC.	2250	WORDEN	MT
—	406-969	0–9 XXXall 10 · 4 holders which blocks →	SKYE TELECOM LLC DBA SKYETEL	622J	BILLINGS	MT
—	406-971	5XXX which blocks →	CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MT	6564	PLEVNA	MT

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.