NumberResearch Membership · Data 09/19/2026

Recent prefix assignments

355 prefixes assigned in the last 30 days · from the daily NANPA CO code file, 09/19/2026

Full prefixes (NXX) Thousands-blocks (1,000-number pools)

Which carriers received which NPA-NXX prefixes, and where. Assignments are initial assignments from NANPA records — because of number portability, the current serving carrier of individual numbers may differ. For finer-grained activity, see the thousands-block view above.

Most active assignees, last 30 days
8X8, INC. 38
ONVOY, LLC - CA 31
NEW CINGULAR WIRELESS PCS, LLC - IL 28
NEW CINGULAR WIRELESS PCS, LLC - DC 26
ONVOY, LLC - NJ 18
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-NXXAssigneeOCNRate centerState
734-645 CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MI 6003 ANN ARBOR MI
734-646 CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MI 6003 ANN ARBOR MI
734-647 MICHIGAN BELL TEL CO 9323 ANN ARBOR MI
734-648 ONVOY, LLCV - MI 543C PINCKNEY MI
734-649 CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MI 6003 ANN ARBOR MI
734-651 AMERICAN MESSAGING SERVICES, LLC 9748 ANN ARBOR MI
734-652 OMNIPOINT COMMUNICATIONS MIDWEST OPERATIONS, LLC 2964 MONROE MI
734-654 MICHIGAN BELL TEL CO 9323 CARLETON MI
734-655 MICHIGAN BELL TEL CO 9323 LIVONIA MI
734-656 PAETEC ITEL, LLC 829J PLYMOUTH MI
734-657 OMNIPOINT COMMUNICATIONS MIDWEST OPERATIONS, LLC 2964 ANN ARBOR MI
734-658 OMNIPOINT COMMUNICATIONS MIDWEST OPERATIONS, LLC 2964 WAYNE MI
734-659 PAETEC ITEL, LLC 829J ERIE MI
734-660 CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MI 6003 ANN ARBOR MI
734-661 MCIMETRO ACCESS TRANSMISSION SERVICES LLC - MI 7279 ANN ARBOR MI
734-662 MICHIGAN BELL TEL CO 9323 ANN ARBOR MI
734-663 MICHIGAN BELL TEL CO 9323 ANN ARBOR MI
734-664 CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MI 6003 WAYNE MI
734-665 MICHIGAN BELL TEL CO 9323 ANN ARBOR MI
734-666 MICHIGAN BELL TEL CO 9323 LIVONIA MI
734-667 COMCAST IP PHONE, LLC 318J PLYMOUTH MI
734-668 MICHIGAN BELL TEL CO 9323 ANN ARBOR MI
734-669 MICHIGAN BELL TEL CO 9323 ANN ARBOR MI
734-670 AMERICAN MESSAGING SERVICES, LLC 9748 ANN ARBOR MI
734-671 MICHIGAN BELL TEL CO 9323 TRENTON MI
734-672 MCIMETRO ACCESS TRANSMISSION SERVICES LLC - MI 7279 TRENTON MI
734-673 OMNIPOINT COMMUNICATIONS MIDWEST OPERATIONS, LLC 2964 WAYNE MI
734-674 OMNIPOINT COMMUNICATIONS MIDWEST OPERATIONS, LLC 2964 WAYNE MI
734-675 MICHIGAN BELL TEL CO 9323 TRENTON MI
734-676 MICHIGAN BELL TEL CO 9323 TRENTON MI
734-677 MICHIGAN BELL TEL CO 9323 ANN ARBOR MI
734-678 OMNIPOINT COMMUNICATIONS MIDWEST OPERATIONS, LLC 2964 ANN ARBOR MI
734-679 CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MI 6003 LIVONIA MI
734-680 METROPCS, INC. 5562 ANN ARBOR MI
734-681 LEVEL 3 COMMUNICATIONS, LLC - MI 6120 MILAN MI
734-682 ONVOY SPECTRUM, LLC 624H MONROE MI
734-687 TELNET WORLDWIDE, INC. 817J MONROE MI
734-688 ONVOY, LLCV - MI 543C PINCKNEY MI
734-689 PAETEC ITEL, LLC 829J WHITMORELK MI
734-692 MICHIGAN BELL TEL CO 9323 TRENTON MI
734-693 NEW CINGULAR WIRELESS PCS, LLC - IL 6534 MONROE MI
734-694 CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MI 6003 WHITMORELK MI
734-697 MICHIGAN BELL TEL CO 9323 BELLEVILLE MI
734-699 MICHIGAN BELL TEL CO 9323 BELLEVILLE MI
734-700 MI
734-710 BANDWIDTH.COM CLEC, LLC - MI 991E WAYNE MI
734-711 MULTIPLE OCN LISTING MULT XXXXXXXXXX MI
734-712 MICHIGAN BELL TEL CO 9323 YPSILANTI MI
734-713 PAETEC ITEL, LLC 829J WAYNE MI
734-714 PAETEC ITEL, LLC 829J YPSILANTI MI

Source: NANPA CO Code Assignments (Utilized, All States, Public), file date 09/19/2026 — Tier A primary source, refreshed on every import. Viewing is free; bulk downloads require a membership.