Recent prefix assignments

5 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, last 30 days — NPA 435

UINTAH BASIN ELECTRONIC TELECOMMUNICATIONS 4

TDS BROADBAND SERVICE LLC 1

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
—	435-656	not yet reported which blocks →	QWEST CORPORATION	9636	ST GEORGE	UT
—	435-657	5XXX6XXX7XXX8XXX · 4 holders which blocks →	QWEST CORPORATION	9636	HEBER CITY	UT
—	435-658	not yet reported which blocks →	QWEST CORPORATION	9636	PARK CITY	UT
—	435-659	0XXX2XXX3XXX4XXX5XXX6XXX7XXX8XXX · 2 holders which blocks →	CELLCO PARTNERSHIP DBA VERIZON WIRELESS - UT	6571	PARK CITY	UT
—	435-660	3XXX4XXX5XXX6XXX7XXX8XXX · 3 holders which blocks →	CELLCO PARTNERSHIP DBA VERIZON WIRELESS - UT	6571	NEPHI	UT
—	435-661	not yet reported which blocks →	BEEHIVE TELEPHONE COMPANY, INC. (UTAH)	4611	DNGLNG RPE	UT
—	435-662	not yet reported which blocks →	BEEHIVE TELEPHONE COMPANY, INC. (UTAH)	4611	CEDAR CITY	UT
—	435-663	not yet reported which blocks →	BEEHIVE TELEPHONE COMPANY, INC. (UTAH)	4611	IBAPAH	UT
—	435-665	not yet reported which blocks →	SKYLINE TELECOM	2283	WENDOVER	UT
—	435-668	not yet reported which blocks →	CELLCO PARTNERSHIP DBA VERIZON WIRELESS - UT	6571	ST GEORGE	UT
—	435-669	4XXX5XXX6XXX7XXX8XXX9XXX which blocks →	CELLCO PARTNERSHIP DBA VERIZON WIRELESS - UT	6571	ST GEORGE	UT
—	435-670	0XXX1XXX2XXX3XXX4XXX5XXX6XXX7XXX8XXX · 6 holders which blocks →	TELEPORT COMMUNICATIONS AMERICA, LLC - UT	7530	SALINA	UT
—	435-671	4XXX5XXX6XXX7XXX9XXX · 2 holders which blocks →	CELLCO PARTNERSHIP DBA VERIZON WIRELESS - UT	6571	HEBER CITY	UT
—	435-672	not yet reported which blocks →	CITIZENS TELECOM-UTAH DBA FRONTIER COMM OF UT	4429	BLUFF	UT
—	435-673	not yet reported which blocks →	QWEST CORPORATION	9636	ST GEORGE	UT
—	435-674	not yet reported which blocks →	QWEST CORPORATION	9636	ST GEORGE	UT
—	435-675	not yet reported which blocks →	QWEST CORPORATION	9636	GLNCNYONCY	UT
—	435-676	none assigned yet which blocks →	SOUTH CENTRAL UTAH TEL. ASSN., INC.	2286	PANGUITCH	UT
—	435-677	1XXX5XXX6XXX7XXX8XXX · 3 holders which blocks →	QWEST CORPORATION	9636	BRIAN HEAD	UT
—	435-678	not yet reported which blocks →	CITIZENS TELECOM-UTAH DBA FRONTIER COMM OF UT	4429	BLANDING	UT
—	435-679	not yet reported which blocks →	SOUTH CENTRAL UTAH TEL. ASSN., INC.	2286	CANNONVL	UT
—	435-680	8XXX which blocks →	NEW CINGULAR WIRELESS PCS, LLC	6010	ST GEORGE	UT
—	435-681	1XXX2XXX3XXX4XXX5XXX6XXX8XXX9XXX · 5 holders which blocks →	NEW CINGULAR WIRELESS PCS, LLC	6010	NEPHI	UT
—	435-682	not yet reported which blocks →	SOUTH CENTRAL UTAH TEL. ASSN., INC.	2286	DUCK CREEK	UT
—	435-683	not yet reported which blocks →	CITIZENS TELECOM-UTAH DBA FRONTIER COMM OF UT	4429	MEXICANHAT	UT
—	435-684	not yet reported which blocks →	CITIZENS TELECOM-UTAH DBA FRONTIER COMM OF UT	4429	LAKEPOWELL	UT
—	435-686	not yet reported which blocks →	CITIZENS TELECOM-UTAH DBA FRONTIER COMM OF UT	4429	LA SAL	UT
—	435-687	not yet reported which blocks →	EMERY TELEPHONE DBA EMERY TELCOM	2278	CASTLEDALE	UT
—	435-688	not yet reported which blocks →	QWEST CORPORATION	9636	ST GEORGE	UT
—	435-689	6XXX which blocks →	NEW CINGULAR WIRELESS PCS, LLC	6010	KANAB	UT
—	435-690	8XXX which blocks →	CELLCO PARTNERSHIP DBA VERIZON WIRELESS - UT	6571	PANGUITCH	UT
—	435-691	6XXX7XXX8XXX9XXX · 3 holders which blocks →	NEW CINGULAR WIRELESS PCS, LLC	6010	CEDAR CITY	UT
—	435-692	not yet reported which blocks →	CITIZENS TELECOM-UTAH DBA FRONTIER COMM OF UT	4429	NAT BRIDGE	UT
—	435-693	not yet reported which blocks →	BEEHIVE TELEPHONE COMPANY, INC. (UTAH)	4611	PARTOUN	UT
—	435-695	0XXX3XXX4XXX5XXX6XXX7XXX8XXX · 3 holders which blocks →	QWEST CORPORATION	9636	BRIGHAM CY	UT
—	435-700	not yet reported which blocks →				UT
—	435-701	1XXX2XXX3XXX4XXX6XXX7XXX8XXX9XXX · 6 holders which blocks →	T-MOBILE USA, INC.	6529	CEDAR CITY	UT
—	435-703	2XXX3XXX4XXX5XXX6XXX7XXX8XXX9XXX · 5 holders which blocks →	T-MOBILE USA, INC.	6529	ST GEORGE	UT
—	435-704	0–9 XXXall 10 · 4 holders which blocks →	CELLCO PARTNERSHIP DBA VERIZON WIRELESS - UT	6571	CEDAR CITY	UT
—	435-705	1XXX2XXX3XXX4XXX5XXX7XXX8XXX9XXX · 4 holders which blocks →	T-MOBILE USA, INC.	6529	ST GEORGE	UT
—	435-708	0–9 XXXall 10 · 6 holders which blocks →	BANDWIDTH.COM CLEC, LLC - UT	117F	CEDAR CITY	UT
—	435-709	0XXX1XXX2XXX3XXX4XXX5XXX6XXX7XXX8XXX · 4 holders which blocks →	TELEPORT COMMUNICATIONS AMERICA, LLC - UT	7530	HEBER CITY	UT
—	435-711	not yet reported which blocks →	MULTIPLE OCN LISTING	MULT	XXXXXXXXXX	UT
—	435-712	not yet reported which blocks →	BEEHIVE TELEPHONE COMPANY, INC. (UTAH)	4611	KOLOB	UT
—	435-713	5XXX which blocks →	QWEST CORPORATION	9636	LOGAN	UT
—	435-714	3XXX4XXX5XXX6XXX7XXX8XXX · 4 holders which blocks →	T-MOBILE USA, INC.	6529	PARK CITY	UT
—	435-716	not yet reported which blocks →	QWEST CORPORATION	9636	LOGAN	UT
—	435-719	not yet reported which blocks →	CITIZENS TELECOM-UTAH DBA FRONTIER COMM OF UT	4429	MOAB	UT
—	435-720	4XXX5XXX6XXX8XXX9XXX which blocks →	CELLCO PARTNERSHIP DBA VERIZON WIRELESS - UT	6571	BRIGHAM CY	UT
—	435-722	none assigned yet which blocks →	UBTA-UBET COMMUNICATIONS, INC. DBA STRATA NETWORKS	2287	ROOSEVELT	UT

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.