Recent prefix assignments

334 prefixes assigned in the last 30 days · from the daily NANPA CO code file, 09/28/2026

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
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
— 605-782 9XXX which blocks → QWEST CORPORATION 9631 SIOUX FLS SD
— 605-783 not yet reported which blocks → INTERSTATE TELECOM COOP, INC. - SD 1651 HAYTI SD
— 605-784 not yet reported which blocks → INTERSTATE TELECOM COOP, INC. - SD 1651 BRADLEY SD
— 605-785 not yet reported which blocks → INTERSTATE TELECOM COOP, INC. - SD 1651 LAKENORDEN SD
— 605-786 2XXX3XXX4XXX5XXX6XXX7XXX8XXX which blocks → QWEST CORPORATION 9631 RAPID CITY SD
— 605-787 0XXX1XXX2XXX3XXX8XXX · 3 holders which blocks → QWEST CORPORATION 9631 RAPID CITY SD
— 605-788 not yet reported which blocks → WEST RIVER COOPERATIVE TELEPHONE COMPANY 1689 MEADOW SD
— 605-793 not yet reported which blocks → INTERSTATE TELECOM COOP, INC. - SD 1651 CASTLEWOOD SD
— 605-794 not yet reported which blocks → INTERSTATE TELECOM COOP, INC. - SD 1651 TORONTO SD
— 605-795 not yet reported which blocks → INTERSTATE TELECOM COOP, INC. - SD 1651 GOODWIN SD
— 605-796 not yet reported which blocks → SANTEL COMMUNICATIONS COOPERATIVE, INC. - SD 1676 WOONSOCKET SD
— 605-797 not yet reported which blocks → WEST RIVER COOPERATIVE TELEPHONE COMPANY 1689 CAMP CROOK SD
— 605-798 not yet reported which blocks → GOLDEN WEST TEL COOP INC DBA GOLDEN WEST TELECOMM 1659 WICKSVILLE SD
— 605-809 0–9 XXXall 10 · 4 holders which blocks → NUSO, LLC 732J SIOUX FLS SD
— 605-811 not yet reported which blocks → MULTIPLE OCN LISTING MULT XXXXXXXXXX SD
— 605-822 not yet reported which blocks → GREAT PLAINS COMMUNICATIONS, INC. 1577 NORTH CODY SD
— 605-823 not yet reported which blocks → WEST RIVER TELECOMMUNICATIONS COOP. - SD 4414 MOBRIDGE SD
— 605-825 not yet reported which blocks → TRIOTEL COMMUNICATIONS, INC. 1669 CLAYTON SD
— 605-826 not yet reported which blocks → INTERSTATE TELECOM COOP, INC. - SD 1651 SINAI SD
— 605-830 4XXX8XXX which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - SD 6569 GREGORY SD
— 605-831 none assigned yet which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - SD 6569 GREGORY SD
— 605-832 not yet reported which blocks → INTERSTATE TELECOM COOP, INC. - SD 1651 ASTORIA SD
— 605-833 not yet reported which blocks → GOLDEN WEST TEL COOP INC DBA GOLDEN WEST TELECOMM 1659 BUFFALOGAP SD
— 605-834 not yet reported which blocks → THREE RIVER TELCO 1525 NORTHNAPER SD
— 605-835 not yet reported which blocks → VIVIAN TEL CO DBA GOLDEN WEST TELECOMMUNICATIONS 1686 GREGORY SD
— 605-836 0–9 XXXall 10 · 7 holders which blocks → MCIMETRO ACCESS TRANSMISSION SERVICES LLC 7229 CANTON SD
— 605-837 not yet reported which blocks → KADOKA TEL CO DBA GOLDEN WEST TELECOMMUNICATIONS 1667 KADOKA SD
— 605-840 none assigned yet which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - SD 6569 WINNER SD
— 605-841 1XXX which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - SD 6569 WINNER SD
— 605-842 not yet reported which blocks → VIVIAN TEL CO DBA GOLDEN WEST TELECOMMUNICATIONS 1686 WINNER SD
— 605-843 not yet reported which blocks → GOLDEN WEST TEL COOP INC DBA GOLDEN WEST TELECOMM 1659 MIDLAND SD
— 605-845 not yet reported which blocks → WEST RIVER TELECOMMUNICATIONS COOP (MOBRIDGE) - SD 1671 MOBRIDGE SD
— 605-847 1XXX2XXX3XXX6XXX7XXX8XXX · 3 holders which blocks → QWEST CORPORATION 9631 LK PRESTON SD
— 605-848 5XXX6XXX8XXX · 2 holders which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - SD 6569 GLENHAM SD
— 605-849 not yet reported which blocks → SANTEL COMMUNICATIONS COOPERATIVE, INC. - SD 1676 ALPENA SD
— 605-850 none assigned yet which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - SD 6569 GLENHAM SD
— 605-852 not yet reported which blocks → VENTURE COMMUNICATIONS COOPERATIVE 1680 HIGHMORE SD
— 605-853 4XXX5XXX6XXX7XXX8XXX · 3 holders which blocks → QWEST CORPORATION 9631 MILLER SD
— 605-854 1XXX2XXX4XXX5XXX6XXX7XXX8XXX · 6 holders which blocks → QWEST CORPORATION 9631 DE SMET SD
— 605-855 not yet reported which blocks → CONSOLIDATED TELCOM 1607 SO REEDER SD
— 605-856 not yet reported which blocks → VIVIAN TEL CO DBA GOLDEN WEST TELECOMMUNICATIONS 1686 MISSION SD
— 605-859 not yet reported which blocks → GOLDEN WEST TEL COOP INC DBA GOLDEN WEST TELECOMM 1659 PHILIP SD
— 605-860 2XXX3XXX4XXX5XXX7XXX · 4 holders which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - SD 6569 DE SMET SD
— 605-861 1XXX2XXX3XXX4XXX5XXX6XXX7XXX8XXX · 2 holders which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - SD 6569 DE SMET SD
— 605-862 5XXX which blocks → QWEST CORPORATION 9631 BIGSTONECY SD
— 605-864 2XXX4XXX5XXX6XXX7XXX · 4 holders which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - SD 6569 FLANDREAU SD
— 605-865 0XXX1XXX2XXX4XXX5XXX6XXX7XXX8XXX9XXX · 5 holders which blocks → QWEST CORPORATION 9631 TIMBERLAKE SD
— 605-866 not yet reported which blocks → WEST RIVER COOPERATIVE TELEPHONE COMPANY 1689 SORUM SD
— 605-867 not yet reported which blocks → GOLDEN WEST TEL COOP INC DBA GOLDEN WEST TELECOMM 1659 PINE RIDGE SD
— 605-868 0XXX5XXX6XXX7XXX8XXX · 4 holders which blocks → AERIAL COMMUNICATIONS, INC. 6701 WATERTOWN SD

Source: NANPA CO Code Assignments (Utilized, All States, Public), file date 09/28/2026 — Tier A primary source, refreshed on every import. Viewing is free; bulk downloads require a membership.