NumberResearch Membership · Data 09/27/2026

Recent prefix assignments

334 prefixes assigned in the last 30 days · from the daily NANPA CO code file, 09/27/2026

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. 43
NEW CINGULAR WIRELESS PCS, LLC - DC 26
Rogers Communications Canada Inc. (Wireless) 23
NEW CINGULAR WIRELESS PCS, LLC - IL 22
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
— 616-588 not yet reported which blocks → TELNET WORLDWIDE, INC. 817J GRAND RPDS MI
— 616-594 0XXX3XXX4XXX5XXX6XXX7XXX8XXX9XXX · 5 holders which blocks → MICHIGAN BELL TEL CO 9323 HOLLAND MI
— 616-595 not yet reported which blocks → SPOK, INC. 6630 GREENVILLE MI
— 616-597 0XXX1XXX2XXX3XXX6XXX7XXX8XXX9XXX · 5 holders which blocks → BANDWIDTH.COM CLEC, LLC - MI 991E IONIA MI
— 616-604 4XXX5XXX7XXX8XXX · 3 holders which blocks → PAETEC ITEL, LLC 829J GRANDHAVEN MI
— 616-606 0XXX2XXX3XXX4XXX5XXX6XXX7XXX8XXX9XXX · 6 holders which blocks → BANDWIDTH.COM CLEC, LLC - MI 991E SPARTA MI
— 616-611 not yet reported which blocks → MULTIPLE OCN LISTING MULT XXXXXXXXXX MI
— 616-613 0XXX1XXX3XXX6XXX · 3 holders which blocks → BANDWIDTH.COM CLEC, LLC - MI 991E ZEELAND MI
— 616-614 not yet reported which blocks → AMERICAN MESSAGING SERVICES, LLC 9748 IONIA MI
— 616-617 not yet reported which blocks → OMNIPOINT COMMUNICATIONS MIDWEST OPERATIONS, LLC 2964 GRAND RPDS MI
— 616-619 not yet reported which blocks → TELNET WORLDWIDE, INC. 817J GREENVILLE MI
— 616-622 0XXX1XXX2XXX4XXX5XXX6XXX7XXX8XXX · 5 holders which blocks → MCIMETRO ACCESS TRANSMISSION SERVICES LLC - MI 7157 ALTO MI
— 616-626 1XXX4XXX5XXX7XXX8XXX · 5 holders which blocks → ONVOY, LLCV - MI 543C BYRON CTR MI
— 616-630 not yet reported which blocks → SPOK, INC. 6630 GRAND RPDS MI
— 616-631 0XXX1XXX2XXX4XXX5XXX6XXX7XXX8XXX9XXX · 5 holders which blocks → MCIMETRO ACCESS TRANSMISSION SERVICES LLC - MI 7157 MOLINE MI
— 616-634 not yet reported which blocks → OMNIPOINT COMMUNICATIONS MIDWEST OPERATIONS, LLC 2964 GRAND RPDS MI
— 616-635 2XXX3XXX4XXX5XXX · 2 holders which blocks → OMNIPOINT COMMUNICATIONS MIDWEST OPERATIONS, LLC 2964 GRAND RPDS MI
— 616-636 0XXX1XXX2XXX3XXX7XXX9XXX · 3 holders which blocks → MICHIGAN BELL TEL CO 9323 SAND LAKE MI
— 616-638 none assigned yet which blocks → OMNIPOINT COMMUNICATIONS MIDWEST OPERATIONS, LLC 2964 GRANDHAVEN MI
— 616-642 2XXX4XXX5XXX7XXX8XXX · 5 holders which blocks → MICHIGAN BELL TEL CO 9323 SARANAC MI
— 616-643 3XXX7XXX8XXX · 3 holders which blocks → MICHIGAN BELL TEL CO 9323 GRAND RPDS MI
— 616-644 not yet reported which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MI 6003 GRAND RPDS MI
— 616-647 5XXX7XXX · 2 holders which blocks → MICHIGAN BELL TEL CO 9323 GRAND RPDS MI
— 616-653 not yet reported which blocks → MICHIGAN BELL TEL CO 9323 GRAND RPDS MI
— 616-654 not yet reported which blocks → MICHIGAN BELL TEL CO 9323 ZEELAND MI
— 616-656 not yet reported which blocks → MICHIGAN BELL TEL CO 9323 DUTTON MI
— 616-662 not yet reported which blocks → MICHIGAN BELL TEL CO 9323 HUDSONVL MI
— 616-666 0–9 XXXall 10 · 3 holders which blocks → NEW CINGULAR WIRELESS PCS, LLC - IL 6534 GRAND RPDS MI
— 616-667 7XXX which blocks → MICHIGAN BELL TEL CO 9323 GRAND RPDS MI
— 616-669 not yet reported which blocks → MICHIGAN BELL TEL CO 9323 HUDSONVL MI
— 616-675 0XXX1XXX2XXX8XXX9XXX · 4 holders which blocks → MICHIGAN BELL TEL CO 9323 CASNOVIA MI
— 616-676 5XXX6XXX7XXX · 3 holders which blocks → MICHIGAN BELL TEL CO 9323 ADA MI
— 616-677 4XXX7XXX8XXX · 3 holders which blocks → MICHIGAN BELL TEL CO 9323 MARNE MI
— 616-678 0XXX1XXX2XXX3XXX6XXX8XXX · 5 holders which blocks → MICHIGAN BELL TEL CO 9323 KENT CITY MI
— 616-680 not yet reported which blocks → SPOK, INC. 6630 GRAND RPDS MI
— 616-681 1XXX3XXX4XXX5XXX6XXX7XXX8XXX · 6 holders which blocks → MICHIGAN BELL TEL CO 9323 DORR MI
— 616-682 3XXX5XXX6XXX7XXX · 4 holders which blocks → MICHIGAN BELL TEL CO 9323 ADA MI
— 616-684 0–9 XXXall 10 · 3 holders which blocks → WAVENATION, LLC 700J GRAND RPDS MI
— 616-688 not yet reported which blocks → ACE TEL. CO. OF MICHIGAN, INC. 0692 DRENTHE MI
— 616-690 9XXX which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MI 6003 GRAND RPDS MI
— 616-691 0XXX1XXX3XXX4XXX5XXX6XXX9XXX · 6 holders which blocks → MICHIGAN BELL TEL CO 9323 GRATTAN MI
— 616-693 1XXX3XXX4XXX5XXX6XXX7XXX8XXX9XXX · 6 holders which blocks → MICHIGAN BELL TEL CO 9323 CLARKSVL MI
— 616-696 not yet reported which blocks → MICHIGAN BELL TEL CO 9323 CEDAR SPG MI
— 616-698 not yet reported which blocks → MICHIGAN BELL TEL CO 9323 DUTTON MI
— 616-700 not yet reported which blocks → MI
— 616-710 1XXX3XXX4XXX5XXX6XXX7XXX8XXX9XXX · 5 holders which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MI 6003 GRAND RPDS MI
— 616-711 not yet reported which blocks → MULTIPLE OCN LISTING MULT XXXXXXXXXX MI
— 616-712 3XXX6XXX · 2 holders which blocks → CHARTER IP ENABLED SERVICES, LLC 792K GREENVILLE MI
— 616-713 not yet reported which blocks → AMERICAN MESSAGING SERVICES, LLC 9748 HOLLAND MI
— 616-717 0XXX1XXX2XXX3XXX5XXX8XXX · 3 holders which blocks → MICHIGAN BELL TEL CO 9323 GRAND RPDS MI

Source: NANPA CO Code Assignments (Utilized, All States, Public), file date 09/27/2026 — Tier A primary source, refreshed on every import. Viewing is free; bulk downloads require a membership.