NumberResearch Membership · Data 09/18/2026

Recent prefix assignments

27 prefixes assigned in the last 30 days · from the daily NANPA CO code file, 09/18/2026

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
NEW CINGULAR WIRELESS PCS, LLC - DC 27
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
617-470 NEW CINGULAR WIRELESS PCS, LLC - DC 4036 BOSTON MA
617-480 NEW CINGULAR WIRELESS PCS, LLC - DC 4036 BOSTON MA
617-510 NEW CINGULAR WIRELESS PCS, LLC - DC 4036 BOSTON MA
617-513 NEW CINGULAR WIRELESS PCS, LLC - DC 4036 BOSTON MA
617-515 NEW CINGULAR WIRELESS PCS, LLC - DC 4036 BOSTON MA
617-538 NEW CINGULAR WIRELESS PCS, LLC - DC 4036 WALTHAM MA
617-543 NEW CINGULAR WIRELESS PCS, LLC - DC 4036 BOSTON MA
617-584 NEW CINGULAR WIRELESS PCS, LLC - DC 4036 NEWTON MA
617-605 NEW CINGULAR WIRELESS PCS, LLC - DC 4036 MALDEN MA
617-610 NEW CINGULAR WIRELESS PCS, LLC - DC 4036 NEWTON MA
617-633 NEW CINGULAR WIRELESS PCS, LLC - DC 4036 WALTHAM MA
617-640 NEW CINGULAR WIRELESS PCS, LLC - DC 4036 DEDHAM MA
617-650 NEW CINGULAR WIRELESS PCS, LLC - DC 4036 BOSTON MA
617-653 NEW CINGULAR WIRELESS PCS, LLC - DC 4036 QUINCY MA
617-678 NEW CINGULAR WIRELESS PCS, LLC - DC 4036 NEWTON MA
617-688 NEW CINGULAR WIRELESS PCS, LLC - DC 4036 KINGSTON MA
617-697 NEW CINGULAR WIRELESS PCS, LLC - DC 4036 BOSTON MA
617-710 NEW CINGULAR WIRELESS PCS, LLC - DC 4036 CAMBRIDGE MA
617-750 NEW CINGULAR WIRELESS PCS, LLC - DC 4036 QUINCY MA
617-755 NEW CINGULAR WIRELESS PCS, LLC - DC 4036 BOSTON MA
617-759 NEW CINGULAR WIRELESS PCS, LLC - DC 4036 DEDHAM MA
617-763 NEW CINGULAR WIRELESS PCS, LLC - DC 4036 BOSTON MA
617-771 NEW CINGULAR WIRELESS PCS, LLC - DC 4036 MALDEN MA
617-775 NEW CINGULAR WIRELESS PCS, LLC - DC 4036 NEWTON MA
617-784 NEW CINGULAR WIRELESS PCS, LLC - DC 4036 BOSTON MA
617-791 NEW CINGULAR WIRELESS PCS, LLC - DC 4036 SAUGUS MA
617-794 NEW CINGULAR WIRELESS PCS, LLC - DC 4036 BOSTON MA
617-803 NEW CINGULAR WIRELESS PCS, LLC - DC 4036 CAMBRIDGE MA
617-816 NEW CINGULAR WIRELESS PCS, LLC - DC 4036 BOSTON MA
617-817 NEW CINGULAR WIRELESS PCS, LLC - DC 4036 BRIGHTON MA
617-827 NEW CINGULAR WIRELESS PCS, LLC - DC 4036 WEYMOUTH MA
617-834 NEW CINGULAR WIRELESS PCS, LLC - DC 4036 BOSTON MA
617-838 NEW CINGULAR WIRELESS PCS, LLC - DC 4036 BOSTON MA
617-840 NEW CINGULAR WIRELESS PCS, LLC - DC 4036 BOSTON MA
617-842 NEW CINGULAR WIRELESS PCS, LLC - DC 4036 QUINCY MA
617-852 NEW CINGULAR WIRELESS PCS, LLC - DC 4036 CAMBRIDGE MA
617-893 NEW CINGULAR WIRELESS PCS, LLC - DC 4036 NEWTON MA
617-899 NEW CINGULAR WIRELESS PCS, LLC - DC 4036 CAMBRIDGE MA
617-901 NEW CINGULAR WIRELESS PCS, LLC - DC 4036 BOSTON MA
617-909 NEW CINGULAR WIRELESS PCS, LLC - DC 4036 CAMBRIDGE MA
617-922 NEW CINGULAR WIRELESS PCS, LLC - DC 4036 MILTON MA
617-930 NEW CINGULAR WIRELESS PCS, LLC - DC 4036 WALTHAM MA
617-943 NEW CINGULAR WIRELESS PCS, LLC - DC 4036 BOSTON MA
617-957 NEW CINGULAR WIRELESS PCS, LLC - DC 4036 MELROSE MA
617-962 NEW CINGULAR WIRELESS PCS, LLC - DC 4036 WALTHAM MA
617-966 NEW CINGULAR WIRELESS PCS, LLC - DC 4036 WALTHAM MA
617-967 NEW CINGULAR WIRELESS PCS, LLC - DC 4036 WALTHAM MA
617-968 NEW CINGULAR WIRELESS PCS, LLC - DC 4036 WALTHAM MA
617-974 NEW CINGULAR WIRELESS PCS, LLC - DC 4036 WALTHAM MA
631-307 NEW CINGULAR WIRELESS PCS, LLC - DC 4036 PATCHOGUE NY

Source: NANPA CO Code Assignments (Utilized, All States, Public), file date 09/18/2026 — Tier A primary source, refreshed on every import. Viewing is free; bulk downloads require a membership.