Recent prefix assignments

5 prefixes assigned in the last 30 days · from the daily NANPA CO code file, 09/19/2026

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
—	435-811	not yet reported which blocks →	MULTIPLE OCN LISTING	MULT	XXXXXXXXXX	UT
—	435-813	1XXX8XXX which blocks →	CELLCO PARTNERSHIP DBA VERIZON WIRELESS - UT	6571	MANTI	UT
—	435-819	1XXX3XXX8XXX9XXX · 3 holders which blocks →	CELLCO PARTNERSHIP DBA VERIZON WIRELESS - UT	6571	KANAB	UT
—	435-820	3XXX5XXX which blocks →	NEW CINGULAR WIRELESS PCS, LLC	6010	PRICE	UT
—	435-822	not yet reported which blocks →	UINTAH BASIN ELECTRONIC TELECOMMUNICATIONS	1772	DUCHESNE	UT
—	435-823	not yet reported which blocks →	UINTAH BASIN ELECTRONIC TELECOMMUNICATIONS	1772	ROOSEVELT	UT
—	435-826	not yet reported which blocks →	SOUTH CENTRAL UTAH TEL. ASSN., INC.	2286	ESCALANTE	UT
—	435-827	not yet reported which blocks →	ALBION TELEPHONE CO. DBA ATC COMMUNICATIONS	2213	ALMO	UT
—	435-828	not yet reported which blocks →	UINTAH BASIN ELECTRONIC TELECOMMUNICATIONS	1772	VERNAL	UT
—	435-830	not yet reported which blocks →	NEW CINGULAR WIRELESS PCS, LLC	6010	TOOELE	UT
—	435-831	not yet reported which blocks →	SKYLINE TELECOM	2283	DUGWAY	UT
—	435-833	not yet reported which blocks →	QWEST CORPORATION	9636	TOOELE	UT
—	435-834	not yet reported which blocks →	SOUTH CENTRAL UTAH TEL. ASSN., INC.	2286	BRYCECNYON	UT
—	435-835	not yet reported which blocks →	MANTI TEL. CO.	2282	MANTI	UT
—	435-836	not yet reported which blocks →	SOUTH CENTRAL UTAH TEL. ASSN., INC.	2286	LOA	UT
—	435-837	not yet reported which blocks →	BEEHIVE TELEPHONE COMPANY, INC. (UTAH)	4611	RUSHVALLEY	UT
—	435-839	not yet reported which blocks →	BEEHIVE TELEPHONE COMPANY, INC. (UTAH)	4611	VERNON	UT
—	435-840	6XXX7XXX9XXX which blocks →	CELLCO PARTNERSHIP DBA VERIZON WIRELESS - UT	6571	TOOELE	UT
—	435-841	0XXX1XXX2XXX3XXX4XXX5XXX6XXX8XXX · 2 holders which blocks →	CELLCO PARTNERSHIP DBA VERIZON WIRELESS - UT	6571	TOOELE	UT
—	435-842	not yet reported which blocks →	CITIZENS TELECOM-UTAH DBA FRONTIER COMM OF UT	4429	MEADOW	UT
—	435-843	not yet reported which blocks →	QWEST CORPORATION	9636	TOOELE	UT
—	435-846	not yet reported which blocks →	CITIZENS TELECOM-UTAH DBA FRONTIER COMM OF UT	4429	OAK CITY	UT
—	435-848	not yet reported which blocks →	UBTA-UBET COMMUNICATIONS, INC. DBA STRATA NETWORKS	2287	TABIONA	UT
—	435-849	2XXX3XXX4XXX5XXX6XXX7XXX8XXX9XXX · 3 holders which blocks →	NEW CINGULAR WIRELESS PCS, LLC	6010	TOOELE	UT
—	435-850	0XXX1XXX2XXX3XXX4XXX5XXX6XXX7XXX8XXX · 4 holders which blocks →	T-MOBILE USA, INC.	6529	TOOELE	UT
—	435-851	5XXX which blocks →	CELLCO PARTNERSHIP DBA VERIZON WIRELESS - UT	6571	MANTI	UT
—	435-854	none assigned yet which blocks →	CITIZENS TELECOM-UTAH DBA FRONTIER COMM OF UT	4429	THATCHER	UT
—	435-855	not yet reported which blocks →	BEEHIVE TELEPHONE COMPANY, INC. (UTAH)	4611	GARRISON	UT
—	435-857	not yet reported which blocks →	CITIZENS TELECOM-UTAH DBA FRONTIER COMM OF UT	4429	LYNNDYL	UT
—	435-863	not yet reported which blocks →	CITIZENS TELECOM-UTAH DBA FRONTIER COMM OF UT	4429	PROMONTORY	UT
—	435-864	none assigned yet which blocks →	CITIZENS TELECOM-UTAH DBA FRONTIER COMM OF UT	4429	DELTA	UT
—	435-865	not yet reported which blocks →	QWEST CORPORATION	9636	CEDAR CITY	UT
—	435-866	6XXX7XXX8XXX · 2 holders which blocks →	CITIZENS TELECOM-UTAH DBA FRONTIER COMM OF UT	4429	PORTAGE	UT
—	435-867	not yet reported which blocks →	QWEST CORPORATION	9636	CEDAR CITY	UT
—	435-870	not yet reported which blocks →	CENTRAL UTAH TEL., INC.	2277	SOLDER SMT	UT
—	435-871	not yet reported which blocks →	BEEHIVE TELEPHONE COMPANY, INC. (UTAH)	4611	PARKVALLEY	UT
—	435-872	none assigned yet which blocks →	CITIZENS TELECOM-UTAH DBA FRONTIER COMM OF UT	4429	SNOWVILLE	UT
—	435-874	4XXX which blocks →	SOUTH CENTRAL UTAH TEL. ASSN., INC.	2286	HILDALE	UT
—	435-877	not yet reported which blocks →	SOUTH CENTRAL UTAH TEL. ASSN., INC.	2286	APPLE VLLY	UT
—	435-878	not yet reported which blocks →	SOUTH CENTRAL UTAH TEL. ASSN., INC.	2286	ENTERPRISE	UT
—	435-879	1XXX3XXX5XXX7XXX9XXX · 5 holders which blocks →	QWEST CORPORATION	9636	ST GEORGE	UT
—	435-880	not yet reported which blocks →	UNION TELEPHONE COMPANY	013B	DUTCH JOHN	UT
—	435-881	8XXX9XXX which blocks →	NEW CINGULAR WIRELESS PCS, LLC	6010	LOGAN	UT
—	435-882	not yet reported which blocks →	QWEST CORPORATION	9636	TOOELE	UT
—	435-884	2XXX7XXX which blocks →	QWEST CORPORATION	9636	TOOELE	UT
—	435-885	not yet reported which blocks →	UNION TEL. CO.	2297	DUTCH JOHN	UT
—	435-888	not yet reported which blocks →	CARBON/EMERY TELCOM, INC. - UT	1190	PRICE	UT
—	435-889	not yet reported which blocks →	UNION TEL. CO.	2297	GREENDALE	UT
—	435-890	0XXX2XXX3XXX4XXX5XXX6XXX7XXX8XXX9XXX · 2 holders which blocks →	CELLCO PARTNERSHIP DBA VERIZON WIRELESS - UT	6571	LOGAN	UT
—	435-893	3XXX5XXX6XXX7XXX · 4 holders which blocks →	QWEST CORPORATION	9636	RICHFIELD	UT

Source: NANPA CO Code Assignments (Utilized, All States, Public), file date 09/19/2026 — Tier A primary source, refreshed on every import. Viewing is free; bulk downloads require a membership.