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
734-785 LEVEL 3 COMMUNICATIONS, LLC - MI 6120 WYANDOTTE MI
734-786 LEVEL 3 COMMUNICATIONS, LLC - MI 6120 ANN ARBOR MI
734-788 NEW CINGULAR WIRELESS PCS, LLC - IL 6534 WAYNE MI
734-789 MICHIGAN BELL TEL CO 9323 FLAT ROCK MI
734-790 CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MI 6003 MONROE MI
734-792 TELEPORT COMMUNICATIONS AMERICA, LLC - MI 770E DEXTER MI
734-793 PAETEC ITEL, LLC 829J LIVONIA MI
734-794 PAETEC ITEL, LLC 829J ANN ARBOR MI
734-795 PAETEC ITEL, LLC 829J FLAT ROCK MI
734-796 PAETEC ITEL, LLC 829J BELLEVILLE MI
734-797 AMERICAN MESSAGING SERVICES, LLC 9748 LIVONIA MI
734-798 AMERICAN MESSAGING SERVICES, LLC 9748 FLAT ROCK MI
734-799 PAETEC ITEL, LLC 829J CARLETON MI
734-805 MICHIGAN BELL TEL CO 9323 LIVONIA MI
734-807 CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MI 6003 TEMPERANCE MI
734-810 MI
734-811 MULTIPLE OCN LISTING MULT XXXXXXXXXX MI
734-812 CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MI 6003 LIVONIA MI
734-817 AMERICAN MESSAGING SERVICES, LLC 9748 ANN ARBOR MI
734-821 ONVOY, LLCV - MI 543C ANN ARBOR MI
734-822 ONVOY, LLCV - MI 543C ANN ARBOR MI
734-823 MCIMETRO ACCESS TRANSMISSION SERVICES LLC - MI 7279 DUNDEE MI
734-826 PAETEC ITEL, LLC 829J IDA MI
734-827 MICHIGAN BELL TEL CO 9323 ANN ARBOR MI
734-828 PAETEC ITEL, LLC 829J DUNDEE MI
734-829 CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MI 6003 YPSILANTI MI
734-838 ONVOY, LLCV - MI 543C LIVONIA MI
734-839 MCIMETRO ACCESS TRANSMISSION SERVICES LLC - MI 7279 WHITMORELK MI
734-843 LEVEL 3 COMMUNICATIONS, LLC - MI 6120 NEW BOSTON MI
734-844 MICHIGAN BELL TEL CO 9323 PLYMOUTH MI
734-846 OMNIPOINT COMMUNICATIONS MIDWEST OPERATIONS, LLC 2964 ANN ARBOR MI
734-847 FRONTIER NORTH, INC. - MI 0695 TEMPERANCE MI
734-848 FRONTIER NORTH, INC. - MI 0695 ERIE MI
734-850 FRONTIER NORTH, INC. - MI 0695 TEMPERANCE MI
734-852 AMERICAN MESSAGING SERVICES, LLC 9748 LIVONIA MI
734-853 TELEPORT COMMUNICATIONS AMERICA, LLC - MI 770E LIVONIA MI
734-854 FRONTIER MIDSTATES, INC. - MI 0681 LAMBERTVL MI
734-855 TELEPORT COMMUNICATIONS AMERICA, LLC - MI 770E LIVONIA MI
734-856 FRONTIER MIDSTATES, INC. - MI 0681 LAMBERTVL MI
734-857 TELEPORT COMMUNICATIONS AMERICA, LLC - MI 770E ROMULUS MI
734-858 TELEPORT COMMUNICATIONS AMERICA, LLC - MI 770E WAYNE MI
734-860 AMERICAN MESSAGING SERVICES, LLC 9748 YPSILANTI MI
734-862 LEVEL 3 COMMUNICATIONS, LLC - MI 6120 PLYMOUTH MI
734-864 LEVEL 3 COMMUNICATIONS, LLC - MI 6120 ANN ARBOR MI
734-865 ONVOY, LLCV - MI 543C BELLEVILLE MI
734-866 CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MI 6003 IDA MI
734-869 MCIMETRO ACCESS TRANSMISSION SERVICES LLC - MI 7279 CARLETON MI
734-872 CHARTER IP ENABLED SERVICES, LLC 792K NEWPORT MI
734-875 CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MI 6003 LOSTPNNSUL MI
734-876 CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MI 6003 MAYBEE 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.