NumberResearch Membership · Data 09/20/2026

Recent thousands-block assignments

8 blocks assigned in the last 30 days · from the daily NANPA thousands-block report, 09/20/2026

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

Most carrier growth happens here, not at the prefix level: under number pooling, carriers receive individual 1,000-number blocks (e.g. 626-470-0XXX) within already-assigned prefixes. Assignments are initial assignments — the current serving carrier of individual numbers may differ due to portability.

Most active assignees, last 30 days — NPA 570
MCIMETRO ACCESS TRANSMISSION SERVICES LLC 7
ONVOY, LLC - PA 1
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 thousands-block assignments
AssignedThousands-blockLast 4 digitsStatusAssigneeOCNRate centerState
2009-03-23 570-485-0XXX 0000–0999Assigned CORE COMMUNICATIONS, INC. - PA 3806 TOWANDA PA
2009-03-23 570-530-0XXX 0000–0999Assigned CORE COMMUNICATIONS, INC. - PA 3806 ROME PA
2009-03-23 570-548-0XXX 0000–0999Assigned CORE COMMUNICATIONS, INC. - PA 3806 ST JOSEPH PA
2009-03-23 570-564-0XXX 0000–0999Assigned CORE COMMUNICATIONS, INC. - PA 3806 TIOGA PA
2009-03-23 570-566-0XXX 0000–0999Assigned CORE COMMUNICATIONS, INC. - PA 3806 PLEASANTMT PA
2009-03-23 570-571-0XXX 0000–0999Assigned CORE COMMUNICATIONS, INC. - PA 3806 WAYMART PA
2009-03-23 570-667-0XXX 0000–0999Assigned CORE COMMUNICATIONS, INC. - PA 3806 MUHLENBURG PA
2009-03-23 570-681-0XXX 0000–0999Assigned CORE COMMUNICATIONS, INC. - PA 3806 UNION DALE PA
2009-03-23 570-684-0XXX 0000–0999Assigned CORE COMMUNICATIONS, INC. - PA 3806 WARREN CTR PA
2009-03-23 570-720-0XXX 0000–0999Assigned CORE COMMUNICATIONS, INC. - PA 3806 ULSTER PA
2009-03-23 570-791-0XXX 0000–0999Assigned CORE COMMUNICATIONS, INC. - PA 3806 WAPWALLOPN PA
2009-03-23 570-792-0XXX 0000–0999Assigned CORE COMMUNICATIONS, INC. - PA 3806 OVAL PA
2009-03-23 570-838-0XXX 0000–0999Assigned CORE COMMUNICATIONS, INC. - PA 3806 WATSONTOWN PA
2009-03-23 570-870-0XXX 0000–0999Assigned CORE COMMUNICATIONS, INC. - PA 3806 TROY PA
2009-03-23 570-948-0XXX 0000–0999Assigned CORE COMMUNICATIONS, INC. - PA 3806 WELLSBORO PA
2009-03-23 570-981-0XXX 0000–0999Assigned CORE COMMUNICATIONS, INC. - PA 3806 WYALUSING PA
2009-03-19 570-203-0XXX 0000–0999Assigned CORE COMMUNICATIONS, INC. - PA 3806 HUGHESVL PA
2009-03-19 570-206-0XXX 0000–0999Assigned CORE COMMUNICATIONS, INC. - PA 3806 MIDLEBYCTR PA
2009-03-19 570-219-0XXX 0000–0999Assigned CORE COMMUNICATIONS, INC. - PA 3806 LAKEWINOLA PA
2009-03-19 570-248-0XXX 0000–0999Assigned CORE COMMUNICATIONS, INC. - PA 3806 LAWRENCEVL PA
2009-03-19 570-264-0XXX 0000–0999Assigned CORE COMMUNICATIONS, INC. - PA 3806 MONTGOMERY PA
2009-03-19 570-304-0XXX 0000–0999Assigned CORE COMMUNICATIONS, INC. - PA 3806 LAWSVILLE PA
2009-03-19 570-305-0XXX 0000–0999Assigned CORE COMMUNICATIONS, INC. - PA 3806 JACKSON PA
2009-03-19 570-306-0XXX 0000–0999Assigned CORE COMMUNICATIONS, INC. - PA 3806 COVINGTON PA
2009-03-19 570-310-0XXX 0000–0999Assigned CORE COMMUNICATIONS, INC. - PA 3806 DALLAS PA
2009-03-19 570-314-0XXX 0000–0999Assigned CORE COMMUNICATIONS, INC. - PA 3806 DUSHORE PA
2009-03-19 570-349-0XXX 0000–0999Assigned CORE COMMUNICATIONS, INC. - PA 3806 EAGLESMERE PA
2009-03-19 570-375-0XXX 0000–0999Assigned CORE COMMUNICATIONS, INC. - PA 3806 LAKEWOOD PA
2009-03-19 570-410-0XXX 0000–0999Assigned CORE COMMUNICATIONS, INC. - PA 3806 HARDING PA
2009-03-19 570-438-0XXX 0000–0999Assigned CORE COMMUNICATIONS, INC. - PA 3806 BROOKLYN PA
2009-03-19 570-463-0XXX 0000–0999Assigned CORE COMMUNICATIONS, INC. - PA 3806 MANSFIELD PA
2009-03-19 570-514-0XXX 0000–0999Assigned CORE COMMUNICATIONS, INC. - PA 3806 MORRIS PA
2009-03-19 570-518-0XXX 0000–0999Assigned CORE COMMUNICATIONS, INC. - PA 3806 MIFFLINBG PA
2009-03-19 570-526-0XXX 0000–0999Assigned CORE COMMUNICATIONS, INC. - PA 3806 FREELAND PA
2009-03-19 570-528-0XXX 0000–0999Assigned CORE COMMUNICATIONS, INC. - PA 3806 HARFORD PA
2009-03-19 570-532-0XXX 0000–0999Assigned CORE COMMUNICATIONS, INC. - PA 3806 LIBERTY PA
2009-03-19 570-533-0XXX 0000–0999Assigned CORE COMMUNICATIONS, INC. - PA 3806 MONTROSE PA
2009-03-19 570-633-0XXX 0000–0999Assigned CORE COMMUNICATIONS, INC. - PA 3806 BENTON PA
2009-03-19 570-747-0XXX 0000–0999Assigned CORE COMMUNICATIONS, INC. - PA 3806 MUNCY VLY PA
2009-03-19 570-757-0XXX 0000–0999Assigned CORE COMMUNICATIONS, INC. - PA 3806 MUNCY PA
2009-03-19 570-781-0XXX 0000–0999Assigned CORE COMMUNICATIONS, INC. - PA 3806 BLOSSBURG PA
2009-03-19 570-782-0XXX 0000–0999Assigned CORE COMMUNICATIONS, INC. - PA 3806 NEWMILFORD PA
2009-03-19 570-813-0XXX 0000–0999Assigned CORE COMMUNICATIONS, INC. - PA 3806 LE RAYSVL PA
2009-03-19 570-896-0XXX 0000–0999Assigned CORE COMMUNICATIONS, INC. - PA 3806 ESTELLA PA
2009-03-19 570-913-0XXX 0000–0999Assigned CORE COMMUNICATIONS, INC. - PA 3806 NEW ALBANY PA
2009-03-19 570-919-0XXX 0000–0999Assigned CORE COMMUNICATIONS, INC. - PA 3806 BEECHCREEK PA
2009-03-13 570-215-1XXX 1000–1999Assigned CORE COMMUNICATIONS, INC. - PA 3806 WHITEHAVEN PA
2009-03-13 570-240-9XXX 9000–9999Assigned CORE COMMUNICATIONS, INC. - PA 3806 TUNKHANNCK PA
2009-03-13 570-252-0XXX 0000–0999Assigned CORE COMMUNICATIONS, INC. - PA 3806 NEWFOUNDLD PA
2009-03-13 570-260-0XXX 0000–0999Assigned CORE COMMUNICATIONS, INC. - PA 3806 ST CLAIR PA

Source: NANPA Thousands Block Assignment Report (All Regions, Public), file date 09/20/2026 — Tier A primary source, refreshed on every import. Viewing is free; bulk downloads require a membership.