NumberResearch Membership · Data 09/18/2026

Recent thousands-block assignments

12 blocks assigned in the last 30 days · from the daily NANPA thousands-block report, 09/18/2026

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
U.S. TELEPACIFIC CORP. DBA TPX COMMUNICATIONS 12
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
AssignedBlockAssigneeOCNRate centerState
2005-03-08 781-474-5XXX U.S. TELEPACIFIC CORP. DBA TPX COMMUNICATIONS 671J NEEDHAM MA
2005-03-08 781-475-5XXX U.S. TELEPACIFIC CORP. DBA TPX COMMUNICATIONS 671J MEDFORD MA
2005-03-08 781-484-5XXX U.S. TELEPACIFIC CORP. DBA TPX COMMUNICATIONS 671J SAUGUS MA
2005-03-08 781-626-5XXX U.S. TELEPACIFIC CORP. DBA TPX COMMUNICATIONS 671J WEYMOUTH MA
2005-03-08 781-652-5XXX U.S. TELEPACIFIC CORP. DBA TPX COMMUNICATIONS 671J LEXINGTON MA
2005-03-08 781-832-5XXX U.S. TELEPACIFIC CORP. DBA TPX COMMUNICATIONS 671J STONEHAM MA
2005-03-08 781-909-5XXX U.S. TELEPACIFIC CORP. DBA TPX COMMUNICATIONS 671J READING MA
2005-03-08 781-992-5XXX U.S. TELEPACIFIC CORP. DBA TPX COMMUNICATIONS 671J WELLESLEY MA
2005-03-08 978-229-5XXX U.S. TELEPACIFIC CORP. DBA TPX COMMUNICATIONS 671J WILMINGTON MA
2005-03-08 978-364-5XXX U.S. TELEPACIFIC CORP. DBA TPX COMMUNICATIONS 671J LOWELL MA
2005-03-08 978-548-5XXX U.S. TELEPACIFIC CORP. DBA TPX COMMUNICATIONS 671J PEABODY MA
2005-03-03 617-206-5XXX U.S. TELEPACIFIC CORP. DBA TPX COMMUNICATIONS 671J BRIGHTON MA
2005-03-03 617-209-5XXX U.S. TELEPACIFIC CORP. DBA TPX COMMUNICATIONS 671J BELMONT MA
2005-03-03 617-396-5XXX U.S. TELEPACIFIC CORP. DBA TPX COMMUNICATIONS 671J BROOKLINE MA
2005-03-03 617-398-5XXX U.S. TELEPACIFIC CORP. DBA TPX COMMUNICATIONS 671J CHARLESTN MA
2005-03-03 617-674-5XXX U.S. TELEPACIFIC CORP. DBA TPX COMMUNICATIONS 671J CAMBRIDGE MA
2005-03-03 781-222-5XXX U.S. TELEPACIFIC CORP. DBA TPX COMMUNICATIONS 671J BURLINGTON MA
2005-03-03 781-232-5XXX U.S. TELEPACIFIC CORP. DBA TPX COMMUNICATIONS 671J CANTON MA
2005-03-03 781-353-5XXX U.S. TELEPACIFIC CORP. DBA TPX COMMUNICATIONS 671J BRAINTREE MA
2005-03-03 781-381-5XXX U.S. TELEPACIFIC CORP. DBA TPX COMMUNICATIONS 671J DEDHAM MA
2005-03-03 978-289-5XXX U.S. TELEPACIFIC CORP. DBA TPX COMMUNICATIONS 671J ANDOVER MA
2005-03-03 978-341-5XXX U.S. TELEPACIFIC CORP. DBA TPX COMMUNICATIONS 671J CONCORD MA
2005-03-03 978-393-5XXX U.S. TELEPACIFIC CORP. DBA TPX COMMUNICATIONS 671J ACTON MA
2005-03-03 978-495-5XXX U.S. TELEPACIFIC CORP. DBA TPX COMMUNICATIONS 671J BILLERICA MA
2005-02-24 951-252-8XXX U.S. TELEPACIFIC CORP. DBA TPX COMMUNICATIONS 671J TEMECULA CA
2005-02-20 617-830-5XXX U.S. TELEPACIFIC CORP. DBA TPX COMMUNICATIONS 671J BOSTON MA
2005-01-12 818-338-7XXX U.S. TELEPACIFIC CORP. DBA TPX COMMUNICATIONS 671J AGOURA CA
2004-12-14 760-601-3XXX U.S. TELEPACIFIC CORP. DBA TPX COMMUNICATIONS 671J PALMDESERT CA
2004-11-17 760-393-5XXX U.S. TELEPACIFIC CORP. DBA TPX COMMUNICATIONS 671J INDIO CA
2004-11-17 909-445-8XXX U.S. TELEPACIFIC CORP. DBA TPX COMMUNICATIONS 671J CLAREMONT CA
2004-11-17 949-900-5XXX U.S. TELEPACIFIC CORP. DBA TPX COMMUNICATIONS 671J SADLBK VLY CA
2004-10-27 805-228-3XXX U.S. TELEPACIFIC CORP. DBA TPX COMMUNICATIONS 671J OXNARD CA
2004-10-27 951-837-2XXX U.S. TELEPACIFIC CORP. DBA TPX COMMUNICATIONS 671J MURRIETA CA
2004-10-26 408-385-3XXX U.S. TELEPACIFIC CORP. DBA TPX COMMUNICATIONS 671J CAMPBELL CA
2004-10-19 559-423-6XXX U.S. TELEPACIFIC CORP. DBA TPX COMMUNICATIONS 671J LEMOORE CA
2004-10-18 760-262-6XXX U.S. TELEPACIFIC CORP. DBA TPX COMMUNICATIONS 671J INDIO CA
2004-10-06 213-537-1XXX U.S. TELEPACIFIC CORP. DBA TPX COMMUNICATIONS 671J LSAN DA 01 CA
2004-10-05 916-235-5XXX U.S. TELEPACIFIC CORP. DBA TPX COMMUNICATIONS 671J FOLSOM CA
2004-09-23 760-238-9XXX U.S. TELEPACIFIC CORP. DBA TPX COMMUNICATIONS 671J INDIO CA
2004-08-20 951-760-7XXX U.S. TELEPACIFIC CORP. DBA TPX COMMUNICATIONS 671J TEMECULA CA
2004-06-08 760-969-6XXX U.S. TELEPACIFIC CORP. DBA TPX COMMUNICATIONS 671J PALM SPG CA
2004-05-18 909-380-7XXX U.S. TELEPACIFIC CORP. DBA TPX COMMUNICATIONS 671J S BERNDINO CA
2004-05-18 909-557-2XXX U.S. TELEPACIFIC CORP. DBA TPX COMMUNICATIONS 671J REDLANDS CA
2004-05-12 408-329-5XXX U.S. TELEPACIFIC CORP. DBA TPX COMMUNICATIONS 671J SUNNYVALE CA
2004-05-12 415-315-0XXX U.S. TELEPACIFIC CORP. DBA TPX COMMUNICATIONS 671J SNFC CNTRL CA
2004-05-11 661-615-6XXX U.S. TELEPACIFIC CORP. DBA TPX COMMUNICATIONS 671J BKFD NORTH CA
2004-05-11 661-617-6XXX U.S. TELEPACIFIC CORP. DBA TPX COMMUNICATIONS 671J BKFD SOUTH CA
2004-04-28 909-581-6XXX U.S. TELEPACIFIC CORP. DBA TPX COMMUNICATIONS 671J UPLAND CA
2004-04-28 909-581-7XXX U.S. TELEPACIFIC CORP. DBA TPX COMMUNICATIONS 671J UPLAND CA
2004-04-08 415-570-5XXX U.S. TELEPACIFIC CORP. DBA TPX COMMUNICATIONS 671J SNFC JUNPR CA

Source: NANPA Thousands Block Assignment Report (All Regions, Public), file date 09/18/2026 — Tier A primary source, refreshed on every import. Viewing is free; bulk downloads require a membership.