NumberResearch Membership · Data 09/18/2026

Recent prefix assignments

79 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 - IL 33
NEW CINGULAR WIRELESS PCS, LLC - DC 30
NEW CINGULAR WIRELESS PCS, LLC - GA 8
NEW CINGULAR WIRELESS PCS, LLC 8
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
917-225 NEW CINGULAR WIRELESS PCS, LLC - DC 4036 NWYRCYZN10 NY
917-226 NEW CINGULAR WIRELESS PCS, LLC - DC 4036 NWYRCYZN10 NY
917-238 NEW CINGULAR WIRELESS PCS, LLC - DC 4036 NWYRCYZN01 NY
917-239 NEW CINGULAR WIRELESS PCS, LLC - DC 4036 NWYRCYZN01 NY
917-287 NEW CINGULAR WIRELESS PCS, LLC - DC 4036 NWYRCYZN01 NY
917-288 NEW CINGULAR WIRELESS PCS, LLC - DC 4036 NWYRCYZN10 NY
917-291 NEW CINGULAR WIRELESS PCS, LLC - DC 4036 NWYRCYZN01 NY
917-297 NEW CINGULAR WIRELESS PCS, LLC - DC 4036 NWYRCYZN01 NY
917-318 NEW CINGULAR WIRELESS PCS, LLC - DC 4036 NWYRCYZN01 NY
917-319 NEW CINGULAR WIRELESS PCS, LLC - DC 4036 NWYRCYZN01 NY
917-324 NEW CINGULAR WIRELESS PCS, LLC - DC 4036 NWYRCYZN10 NY
917-327 NEW CINGULAR WIRELESS PCS, LLC - DC 4036 NWYRCYZN01 NY
917-328 NEW CINGULAR WIRELESS PCS, LLC - DC 4036 NWYRCYZN01 NY
917-331 NEW CINGULAR WIRELESS PCS, LLC - DC 4036 NWYRCYZN01 NY
917-340 NEW CINGULAR WIRELESS PCS, LLC - DC 4036 NWYRCYZN01 NY
917-355 NEW CINGULAR WIRELESS PCS, LLC - DC 4036 NWYRCYZN01 NY
917-370 NEW CINGULAR WIRELESS PCS, LLC - DC 4036 NWYRCYZN01 NY
917-371 NEW CINGULAR WIRELESS PCS, LLC - DC 4036 NWYRCYZN01 NY
917-373 NEW CINGULAR WIRELESS PCS, LLC - DC 4036 NWYRCYZN10 NY
917-374 NEW CINGULAR WIRELESS PCS, LLC - DC 4036 NWYRCYZN01 NY
917-375 NEW CINGULAR WIRELESS PCS, LLC - DC 4036 NWYRCYZN01 NY
917-376 NEW CINGULAR WIRELESS PCS, LLC - DC 4036 NWYRCYZN10 NY
917-392 NEW CINGULAR WIRELESS PCS, LLC - DC 4036 NWYRCYZN01 NY
917-399 NEW CINGULAR WIRELESS PCS, LLC - DC 4036 NWYRCYZN01 NY
917-420 NEW CINGULAR WIRELESS PCS, LLC - DC 4036 NWYRCYZN01 NY
917-428 NEW CINGULAR WIRELESS PCS, LLC - DC 4036 NWYRCYZN01 NY
917-434 NEW CINGULAR WIRELESS PCS, LLC - DC 4036 NWYRCYZN01 NY
917-435 NEW CINGULAR WIRELESS PCS, LLC - DC 4036 NWYRCYZN10 NY
917-445 NEW CINGULAR WIRELESS PCS, LLC - DC 4036 NWYRCYZN01 NY
917-446 NEW CINGULAR WIRELESS PCS, LLC - DC 4036 NWYRCYZN01 NY
917-455 NEW CINGULAR WIRELESS PCS, LLC - DC 4036 NWYRCYZN01 NY
917-488 NEW CINGULAR WIRELESS PCS, LLC - DC 4036 NWYRCYZN01 NY
917-499 NEW CINGULAR WIRELESS PCS, LLC - DC 4036 NWYRCYZN01 NY
917-513 NEW CINGULAR WIRELESS PCS, LLC - DC 4036 NWYRCYZN01 NY
917-514 NEW CINGULAR WIRELESS PCS, LLC - DC 4036 NWYRCYZN01 NY
917-515 NEW CINGULAR WIRELESS PCS, LLC - DC 4036 NWYRCYZN10 NY
917-520 NEW CINGULAR WIRELESS PCS, LLC - DC 4036 NWYRCYZN01 NY
917-528 NEW CINGULAR WIRELESS PCS, LLC - DC 4036 NWYRCYZN01 NY
917-539 NEW CINGULAR WIRELESS PCS, LLC - DC 4036 NWYRCYZN01 NY
917-543 NEW CINGULAR WIRELESS PCS, LLC - DC 4036 NWYRCYZN01 NY
917-544 NEW CINGULAR WIRELESS PCS, LLC - DC 4036 NWYRCYZN01 NY
917-545 NEW CINGULAR WIRELESS PCS, LLC - DC 4036 NWYRCYZN01 NY
917-558 NEW CINGULAR WIRELESS PCS, LLC - DC 4036 NWYRCYZN01 NY
917-561 NEW CINGULAR WIRELESS PCS, LLC - DC 4036 NWYRCYZN10 NY
917-562 NEW CINGULAR WIRELESS PCS, LLC - DC 4036 NWYRCYZN10 NY
917-573 NEW CINGULAR WIRELESS PCS, LLC - DC 4036 NWYRCYZN01 NY
917-587 NEW CINGULAR WIRELESS PCS, LLC - DC 4036 NWYRCYZN01 NY
917-592 NEW CINGULAR WIRELESS PCS, LLC - DC 4036 NWYRCYZN01 NY
917-593 NEW CINGULAR WIRELESS PCS, LLC - DC 4036 NWYRCYZN01 NY
917-595 NEW CINGULAR WIRELESS PCS, LLC - DC 4036 NWYRCYZN01 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.