NumberResearch Membership · Data 09/20/2026

Recent prefix assignments

1 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 989
CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MI 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
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Recent NPA-NXX prefix assignments
AssignedNPA-NXXThousands-blocks taken (last-4 opening)Code holderOCNRate centerState
— 989-427 4XXX7XXX8XXX · 3 holders which blocks → FRONTIER NORTH, INC. - MI 0695 EDMORE MI
— 989-428 0XXX1XXX2XXX8XXX · 4 holders which blocks → BRIGHTSPEED OF MICHIGAN, LLC 0702 PORT HOPE MI
— 989-429 none assigned yet which blocks → OMNIPOINT COMMUNICATIONS MIDWEST OPERATIONS, LLC 2964 HARRISON MI
— 989-430 not yet reported which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MI 6003 MIDLAND MI
— 989-433 1XXX4XXX6XXX7XXX8XXX · 5 holders which blocks → MICHIGAN BELL TEL CO 9323 ROSEBUSH MI
— 989-434 not yet reported which blocks → AMERICAN MESSAGING SERVICES, LLC 9748 BAD AXE MI
— 989-435 1XXX5XXX6XXX · 3 holders which blocks → MICHIGAN BELL TEL CO 9323 BEAVERTON MI
— 989-440 not yet reported which blocks → AMERICAN MESSAGING SERVICES, LLC 9748 CLARE MI
— 989-444 2XXX3XXX4XXX5XXX6XXX7XXX8XXX9XXX · 6 holders which blocks → NEW CINGULAR WIRELESS PCS, LLC - IL 6534 MTPLEASANT MI
— 989-450 not yet reported which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MI 6003 BAY CITY MI
— 989-453 not yet reported which blocks → PIGEON TEL. CO. 0721 PIGEON MI
— 989-454 not yet reported which blocks → SPOK, INC. 6630 MIDLAND MI
— 989-460 7XXX8XXX · 2 holders which blocks → PAETEC ITEL, LLC 829J BAY CITY MI
— 989-461 0XXX1XXX2XXX3XXX4XXX5XXX6XXX7XXX · 4 holders which blocks → TELEPORT COMMUNICATIONS AMERICA, LLC - MI 770E GAINES MI
— 989-462 0XXX1XXX3XXX5XXX · 4 holders which blocks → PAETEC ITEL, LLC 829J ALMA MI
— 989-463 not yet reported which blocks → FRONTIER NORTH, INC. - MI 0695 ALMA MI
— 989-465 0XXX2XXX3XXX4XXX5XXX7XXX8XXX · 6 holders which blocks → MICHIGAN BELL TEL CO 9323 COLEMAN MI
— 989-466 not yet reported which blocks → FRONTIER NORTH, INC. - MI 0695 ALMA MI
— 989-469 0XXX1XXX5XXX6XXX7XXX8XXX9XXX · 6 holders which blocks → BRIGHTSPEED OF MICHIGAN, LLC 0702 SANDLK HTS MI
— 989-471 0XXX1XXX6XXX7XXX9XXX · 4 holders which blocks → FRONTIER NORTH, INC. - MI 0695 OSSINEKE MI
— 989-473 0XXX1XXX5XXX6XXX8XXX · 4 holders which blocks → FRONTIER MIDSTATES, INC. - MI 0681 LUPTON MI
— 989-478 not yet reported which blocks → AMERICAN MESSAGING SERVICES, LLC 9748 GRAYLING MI
— 989-479 1XXX2XXX4XXX7XXX8XXX · 5 holders which blocks → FRONTIER NORTH, INC. - MI 0695 HARBOR BCH MI
— 989-489 not yet reported which blocks → AMERICAN MESSAGING SERVICES, LLC 9748 OSCODA MI
— 989-490 not yet reported which blocks → AMERICAN MESSAGING SERVICES, LLC 9748 GAYLORD MI
— 989-493 7XXX8XXX which blocks → OMNIPOINT COMMUNICATIONS MIDWEST OPERATIONS, LLC 2964 SAGINAW MI
— 989-495 1XXX2XXX3XXX4XXX6XXX8XXX · 5 holders which blocks → MICHIGAN BELL TEL CO 9323 MIDLAND MI
— 989-496 not yet reported which blocks → MICHIGAN BELL TEL CO 9323 MIDLAND MI
— 989-497 4XXX which blocks → MICHIGAN BELL TEL CO 9323 SAGINAW MI
— 989-498 1XXX3XXX5XXX6XXX7XXX8XXX9XXX · 3 holders which blocks → MICHIGAN BELL TEL CO 9323 SAGINAW MI
— 989-501 2XXX3XXX4XXX5XXX7XXX8XXX · 2 holders which blocks → OMNIPOINT COMMUNICATIONS MIDWEST OPERATIONS, LLC 2964 SAGINAW MI
— 989-503 1XXX2XXX3XXX4XXX5XXX6XXX7XXX8XXX9XXX which blocks → NEW CINGULAR WIRELESS PCS, LLC - IL 6534 HIGGINS LK MI
— 989-506 not yet reported which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MI 6003 MTPLEASANT MI
— 989-509 not yet reported which blocks → TELNET WORLDWIDE, INC. 817J BAY CITY MI
— 989-510 1XXX2XXX5XXX6XXX7XXX8XXX · 5 holders which blocks → NEW CINGULAR WIRELESS PCS, LLC - IL 6534 PRESCOTT MI
— 989-511 not yet reported which blocks → MULTIPLE OCN LISTING MULT XXXXXXXXXX MI
— 989-514 1XXX2XXX3XXX4XXX5XXX6XXX7XXX · 3 holders which blocks → NEW CINGULAR WIRELESS PCS, LLC - IL 6534 STERLING MI
— 989-520 1XXX2XXX3XXX4XXX5XXX7XXX8XXX9XXX · 5 holders which blocks → NEW CINGULAR WIRELESS PCS, LLC - IL 6534 ALGER MI
— 989-528 0XXX1XXX3XXX4XXX5XXX7XXX8XXX · 4 holders which blocks → NEW CINGULAR WIRELESS PCS, LLC - IL 6534 AKRON MI
— 989-537 not yet reported which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MI 6003 PINCONNING MI
— 989-538 1XXX2XXX3XXX4XXX5XXX6XXX7XXX8XXX9XXX · 3 holders which blocks → NEW CINGULAR WIRELESS PCS, LLC - IL 6534 HOUGHTONLK MI
— 989-539 not yet reported which blocks → MICHIGAN BELL TEL CO 9323 HARRISON MI
— 989-544 0XXX1XXX4XXX5XXX6XXX7XXX8XXX9XXX · 6 holders which blocks → MICHIGAN BELL TEL CO 9323 FARWELL MI
— 989-550 not yet reported which blocks → THUMB CELLULAR LP 6718 PIGEON MI
— 989-551 not yet reported which blocks → THUMB CELLULAR LP 6718 PIGEON MI
— 989-553 not yet reported which blocks → THUMB CELLULAR LP 6718 PIGEON MI
— 989-555 not yet reported which blocks → MULTIPLE OCN LISTING MULT DIR ASST MI
— 989-560 not yet reported which blocks → NEW CINGULAR WIRELESS PCS, LLC - IL 6534 MTPLEASANT MI
— 989-561 not yet reported which blocks → BLANCHARD TELEPHONE CO. 0678 BLANCHARD MI
— 989-572 0–9 XXXall 10 · 4 holders which blocks → DAYSTARR LLC DBA DAYSTARR COMMUNICATIONS 993L MTPLEASANT MI

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.