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
917-822 NEW CINGULAR WIRELESS PCS, LLC - DC 4036 NWYRCYZN01 NY
917-823 SPOK, INC. 6630 NWYRCYZN01 NY
917-824 SPOK, INC. 6630 NWYRCYZN01 NY
917-825 NEW CINGULAR WIRELESS PCS, LLC - DC 4036 NWYRCYZN01 NY
917-826 NEW CINGULAR WIRELESS PCS, LLC - DC 4036 NWYRCYZN01 NY
917-827 AMERICAN MESSAGING SERVICES, LLC 9748 NWYRCYZN01 NY
917-828 CELLCO PARTNERSHIP DBA VERIZON WIRELESS - NY 6959 NWYRCYZN01 NY
917-833 NEW CINGULAR WIRELESS PCS, LLC - DC 4036 NWYRCYZN10 NY
917-834 NEW CINGULAR WIRELESS PCS, LLC - DC 4036 NWYRCYZN10 NY
917-835 TRINITY INTERNATIONAL, INC. 6800 NWYRCYZN01 NY
917-836 CELLCO PARTNERSHIP DBA VERIZON WIRELESS - NY 6959 NWYRCYZN01 NY
917-837 CELLCO PARTNERSHIP DBA VERIZON WIRELESS - NY 6959 NWYRCYZN01 NY
917-838 CELLCO PARTNERSHIP DBA VERIZON WIRELESS - NY 6959 NWYRCYZN01 NY
917-839 VERIZON NEW YORK, INC. 9104 NWYRCYZN07 NY
917-840 SPOK, INC. 6630 NWYRCYZN08 NY
917-841 CELLCO PARTNERSHIP DBA VERIZON WIRELESS - NY 6959 NWYRCYZN01 NY
917-842 CELLCO PARTNERSHIP DBA VERIZON WIRELESS - NY 6959 NWYRCYZN01 NY
917-843 CELLCO PARTNERSHIP DBA VERIZON WIRELESS - NY 6959 NWYRCYZN01 NY
917-844 SPOK, INC. 6630 NWYRCYZN01 NY
917-845 SPOK, INC. 6630 NWYRCYZN01 NY
917-846 CELLCO PARTNERSHIP DBA VERIZON WIRELESS - NY 6959 NWYRCYZN01 NY
917-847 NEW CINGULAR WIRELESS PCS, LLC - DC 4036 NWYRCYZN01 NY
917-848 CELLCO PARTNERSHIP DBA VERIZON WIRELESS - NY 6959 NWYRCYZN01 NY
917-849 VERIZON NEW YORK, INC. 9104 NWYRCYZN01 NY
917-850 SPOK, INC. 6630 NWYRCYZN01 NY
917-851 SPOK, INC. 6630 NWYRCYZN01 NY
917-853 NEW CINGULAR WIRELESS PCS, LLC - DC 4036 NWYRCYZN10 NY
917-854 NEW CINGULAR WIRELESS PCS, LLC - DC 4036 NWYRCYZN10 NY
917-855 NEW CINGULAR WIRELESS PCS, LLC - DC 4036 NWYRCYZN01 NY
917-856 NEW CINGULAR WIRELESS PCS, LLC - DC 4036 NWYRCYZN01 NY
917-857 SPOK, INC. 6630 NWYRCYZN01 NY
917-858 OMNIPOINT COMMUNICATIONS, INC. - NY 6622 NWYRCYZN01 NY
917-859 NEW CINGULAR WIRELESS PCS, LLC - DC 4036 NWYRCYZN01 NY
917-860 NEW CINGULAR WIRELESS PCS, LLC - DC 4036 NWYRCYZN01 NY
917-861 NEW CINGULAR WIRELESS PCS, LLC - DC 4036 NWYRCYZN01 NY
917-862 NEW CINGULAR WIRELESS PCS, LLC - DC 4036 NWYRCYZN10 NY
917-863 NEW CINGULAR WIRELESS PCS, LLC - DC 4036 NWYRCYZN10 NY
917-864 NEW CINGULAR WIRELESS PCS, LLC - DC 4036 NWYRCYZN10 NY
917-865 NEW CINGULAR WIRELESS PCS, LLC - DC 4036 NWYRCYZN06 NY
917-866 SPOK, INC. 6630 NWYRCYZN06 NY
917-867 SPOK, INC. 6630 NWYRCYZN06 NY
917-868 NEW CINGULAR WIRELESS PCS, LLC - DC 4036 NWYRCYZN10 NY
917-869 SPOK, INC. 6630 NWYRCYZN06 NY
917-871 SPOK, INC. 6630 NWYRCYZN01 NY
917-872 SPOK, INC. 6630 NWYRCYZN06 NY
917-873 NEW CINGULAR WIRELESS PCS, LLC - DC 4036 NWYRCYZN06 NY
917-874 SPOK, INC. 6630 NWYRCYZN01 NY
917-875 SPOK, INC. 6630 NWYRCYZN01 NY
917-876 SPOK, INC. 6630 NWYRCYZN01 NY
917-879 SPOK, INC. 6630 NWYRCYZN06 NY

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.