NumberResearch Membership · Data 09/30/2026

Recent prefix assignments

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

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
Rogers Communications Canada Inc. (Wireless) 46
8X8, INC. 43
NEW CINGULAR WIRELESS PCS, LLC - DC 28
NEW CINGULAR WIRELESS PCS, LLC - IL 23
ONVOY, LLC - CA 19
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
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Recent NPA-NXX prefix assignments
AssignedNPA-NXXThousands-blocks taken (last-4 opening)Code holderOCNRate centerState
— 435-645 not yet reported which blocks → QWEST CORPORATION 9636 PARK CITY UT
— 435-646 not yet reported which blocks → UBTA-UBET COMMUNICATIONS, INC. DBA STRATA NETWORKS 2287 FLATTOP UT
— 435-647 none assigned yet which blocks → QWEST CORPORATION 9636 PARK CITY UT
— 435-648 not yet reported which blocks → SOUTH CENTRAL UTAH TEL. ASSN., INC. 2286 ORDERVILLE UT
— 435-649 not yet reported which blocks → QWEST CORPORATION 9636 PARK CITY UT
— 435-650 not yet reported which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - UT 6571 PRICE UT
— 435-651 not yet reported which blocks → NAVAJO COMM CO INC - UT DBA NAVAJO COMM UT 4451 MNZMCRANTH UT
— 435-652 not yet reported which blocks → QWEST CORPORATION 9636 ST GEORGE UT
— 435-653 not yet reported which blocks → EMERY TELEPHONE DBA EMERY TELCOM 2278 CASTLEDALE UT
— 435-654 none assigned yet which blocks → QWEST CORPORATION 9636 HEBER CITY UT
— 435-655 none assigned yet which blocks → QWEST CORPORATION 9636 PARK CITY UT
— 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

Source: NANPA CO Code Assignments (Utilized, All States, Public), file date 09/30/2026 — Tier A primary source, refreshed on every import. Viewing is free; bulk downloads require a membership.