NumberResearch Membership · Data 09/22/2026

Recent prefix assignments

354 prefixes assigned in the last 30 days · from the daily NANPA CO code file, 09/22/2026

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. 39
NEW CINGULAR WIRELESS PCS, LLC - IL 28
ONVOY, LLC - CA 27
NEW CINGULAR WIRELESS PCS, LLC - DC 26
ONVOY, LLC - NJ 20
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
— 715-609 1XXX2XXX3XXX4XXX5XXX6XXX7XXX8XXX · 6 holders which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - WI 6508 LADYSMITH WI
— 715-610 8XXX9XXX which blocks → NEW CINGULAR WIRELESS PCS, LLC - IL 6534 ANTIGO WI
— 715-611 not yet reported which blocks → MULTIPLE OCN LISTING MULT XXXXXXXXXX WI
— 715-612 8XXX which blocks → NEW CINGULAR WIRELESS PCS, LLC - IL 6534 TOMAHAWK WI
— 715-613 not yet reported which blocks → NEW CINGULAR WIRELESS PCS, LLC - IL 6534 COLBY WI
— 715-614 not yet reported which blocks → NEW CINGULAR WIRELESS PCS, LLC - IL 6534 MINOCQUA WI
— 715-615 9XXX which blocks → NEW CINGULAR WIRELESS PCS, LLC - IL 6534 STRATFORD WI
— 715-616 0XXX4XXX5XXX6XXX8XXX9XXX · 6 holders which blocks → NEW CINGULAR WIRELESS PCS, LLC - IL 6534 WABENO WI
— 715-617 not yet reported which blocks → NEW CINGULAR WIRELESS PCS, LLC - IL 6534 EAGLERIVER WI
— 715-619 1XXX2XXX3XXX4XXX5XXX6XXX7XXX8XXX9XXX · 3 holders which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - WI 6508 MENOMONIE WI
— 715-620 0XXX1XXX2XXX3XXX4XXX6XXX8XXX9XXX which blocks → ONVOY, LLC - WI 225C EAU CLAIRE WI
— 715-623 not yet reported which blocks → FRONTIER NORTH INC. - WI 0886 ANTIGO WI
— 715-627 8XXX which blocks → FRONTIER NORTH INC. - WI 0886 ANTIGO WI
— 715-629 1XXX2XXX3XXX4XXX5XXX6XXX7XXX8XXX9XXX · 7 holders which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - WI 6508 RIVERFALLS WI
— 715-630 not yet reported which blocks → NEW CINGULAR WIRELESS PCS, LLC - IL 6534 STEVENS PT WI
— 715-631 1XXX3XXX4XXX6XXX7XXX · 3 holders which blocks → NEW CINGULAR WIRELESS PCS, LLC - IL 6534 WINTER WI
— 715-632 4XXX7XXX · 2 holders which blocks → TELEPHONE USA OF WISCONSIN, LLC DBA CENTURYLINK 1155 WHEELER WI
— 715-634 not yet reported which blocks → TELEPHONE USA OF WISCONSIN, LLC DBA CENTURYLINK 1155 HAYWARD WI
— 715-635 not yet reported which blocks → BRIGHTSPEED OF WESTERN WISCONSIN, LLC 0922 SPOONER WI
— 715-636 0XXX4XXX5XXX6XXX7XXX8XXX which blocks → QWEST CORPORATION 9631 MONTDU LAC WI
— 715-637 not yet reported which blocks → CTC TELCOM, INC. 7998 BARRON WI
— 715-638 0XXX1XXX4XXX6XXX7XXX · 4 holders which blocks → TELEPHONE USA OF WISCONSIN, LLC DBA CENTURYLINK 1155 HAYWARD WI
— 715-639 0XXX1XXX3XXX4XXX5XXX8XXX · 4 holders which blocks → TELEPHONE USA OF WISCONSIN, LLC DBA CENTURYLINK 1155 ELMWOOD WI
— 715-640 none assigned yet which blocks → LAKELAND COMMUNICATIONS GROUP, LLC 0769 CENTURIA WI
— 715-643 1XXX6XXX8XXX · 3 holders which blocks → TELEPHONE USA OF WISCONSIN, LLC DBA CENTURYLINK 1155 BOYCEVILLE WI
— 715-644 1XXX8XXX9XXX · 3 holders which blocks → BRIGHTSPEED OF NORTH CENTRAL WISCONSIN, LLC 0924 STANLEY WI
— 715-646 0XXX3XXX4XXX5XXX6XXX7XXX · 2 holders which blocks → TELEPHONE USA OF WISCONSIN, LLC DBA CENTURYLINK 1155 CENTURIA WI
— 715-647 7XXX8XXX · 2 holders which blocks → TELEPHONE USA OF WISCONSIN, LLC DBA CENTURYLINK 1155 PLUM CITY WI
— 715-648 not yet reported which blocks → LAKELAND COMMUNICATIONS GROUP, LLC 0902 CUSHING WI
— 715-649 0XXX2XXX · 2 holders which blocks → FRONTIER COMMUNICATIONS OF WISCONSIN LLC 0870 ARGONNE WI
— 715-652 7XXX8XXX9XXX · 3 holders which blocks → CENTRAL STATE TEL. CO 0859 AUBURNDALE WI
— 715-653 5XXX6XXX · 2 holders which blocks → BRIGHTSPEED OF NORTHWEST WISCONSIN, LLC 0950 LEWIS WI
— 715-654 7XXX8XXX · 2 holders which blocks → MIDWAY TEL. CO. 0909 DORCHESTER WI
— 715-656 2XXX6XXX8XXX · 3 holders which blocks → BRIGHTSPEED OF NORTHWEST WISCONSIN, LLC 0950 DANBURY WI
— 715-658 not yet reported which blocks → CHIBARDUN TEL. COOP., INC. 0861 SAND CREEK WI
— 715-659 0XXX6XXX7XXX9XXX · 3 holders which blocks → FRONTIER NORTH INC. - WI 0886 SPENCER WI
— 715-662 0XXX3XXX5XXX6XXX7XXX8XXX · 4 holders which blocks → BRIGHTSPEED OF CENTRAL WISCONSIN, LLC 1159 TAYLOR WI
— 715-664 none assigned yet which blocks → WEST WISCONSIN TELCOM COOP., INC. 0971 DOWNSVILLE WI
— 715-665 1XXX3XXX4XXX5XXX6XXX7XXX8XXX9XXX · 4 holders which blocks → TELEPHONE USA OF WISCONSIN, LLC DBA CENTURYLINK 1155 KNAPP WI
— 715-667 6XXX7XXX8XXX · 2 holders which blocks → BRIGHTSPEED OF WESTERN WISCONSIN, LLC 0922 BOYD WI
— 715-668 0XXX1XXX3XXX8XXX · 4 holders which blocks → BRIGHTSPEED OF NORTHERN WISCONSIN, LLC 0956 JUMP RIVER WI
— 715-669 6XXX9XXX · 2 holders which blocks → BRIGHTSPEED OF WESTERN WISCONSIN, LLC 0959 THORP WI
— 715-671 0XXX1XXX3XXX6XXX7XXX · 4 holders which blocks → NEW CINGULAR WIRELESS PCS, LLC - IL 6534 CUMBERLAND WI
— 715-672 7XXX which blocks → NELSON COMMUNICATIONS COOPERATIVE 0918 DURAND WI
— 715-673 not yet reported which blocks → NELSON COMMUNICATIONS COOPERATIVE 0918 NELSON WI
— 715-674 0XXX8XXX · 2 holders which blocks → TELEPHONE USA OF WISCONSIN, LLC DBA CENTURYLINK 1155 LAONA WI
— 715-675 not yet reported which blocks → FRONTIER NORTH INC. - WI 0886 WAUSAU WI
— 715-676 6XXX7XXX · 2 holders which blocks → CENTRAL STATE TEL. CO 0859 LINDSEY WI
— 715-677 none assigned yet which blocks → AMHERST TEL. CO. 0843 ROSHOLT WI
— 715-678 5XXX7XXX8XXX · 3 holders which blocks → MIDWAY TEL. CO. 0909 STETSONVL WI

Source: NANPA CO Code Assignments (Utilized, All States, Public), file date 09/22/2026 — Tier A primary source, refreshed on every import. Viewing is free; bulk downloads require a membership.