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
2012-06-22 818-743-5XXX U.S. TELEPACIFIC CORP. DBA TPX COMMUNICATIONS 671J SNFN SNFN CA
2012-06-08 408-620-8XXX U.S. TELEPACIFIC CORP. DBA TPX COMMUNICATIONS 671J SNJS SOUTH CA
2012-05-02 415-361-4XXX U.S. TELEPACIFIC CORP. DBA TPX COMMUNICATIONS 671J SNFC CNTRL CA
2012-05-02 415-470-5XXX U.S. TELEPACIFIC CORP. DBA TPX COMMUNICATIONS 671J SNFC CNTRL CA
2012-05-02 949-572-2XXX U.S. TELEPACIFIC CORP. DBA TPX COMMUNICATIONS 671J IRVINE CA
2012-03-20 361-343-8XXX U.S. TELEPACIFIC CORP. DBA TPX COMMUNICATIONS 671J BEEVILLE TX
2012-03-20 361-450-4XXX U.S. TELEPACIFIC CORP. DBA TPX COMMUNICATIONS 671J ROCKPORT TX
2012-03-20 361-453-3XXX U.S. TELEPACIFIC CORP. DBA TPX COMMUNICATIONS 671J ALICE TX
2012-03-20 361-543-2XXX U.S. TELEPACIFIC CORP. DBA TPX COMMUNICATIONS 671J WOODSBORO TX
2012-03-20 361-683-3XXX U.S. TELEPACIFIC CORP. DBA TPX COMMUNICATIONS 671J MATHIS TX
2012-03-20 409-572-7XXX U.S. TELEPACIFIC CORP. DBA TPX COMMUNICATIONS 671J GALVESTON TX
2012-03-20 409-995-5XXX U.S. TELEPACIFIC CORP. DBA TPX COMMUNICATIONS 671J TXSCYMARQU TX
2012-03-20 817-587-7XXX U.S. TELEPACIFIC CORP. DBA TPX COMMUNICATIONS 671J ALVARADO TX
2012-03-20 817-612-2XXX U.S. TELEPACIFIC CORP. DBA TPX COMMUNICATIONS 671J AZLE TX
2012-03-20 830-867-6XXX U.S. TELEPACIFIC CORP. DBA TPX COMMUNICATIONS 671J BRACKETTVL TX
2012-03-20 830-875-4XXX U.S. TELEPACIFIC CORP. DBA TPX COMMUNICATIONS 671J LULING TX
2012-03-20 832-789-7XXX U.S. TELEPACIFIC CORP. DBA TPX COMMUNICATIONS 671J VLY LODGE TX
2012-03-20 936-398-3XXX U.S. TELEPACIFIC CORP. DBA TPX COMMUNICATIONS 671J CORRIGAN TX
2012-03-20 940-468-6XXX U.S. TELEPACIFIC CORP. DBA TPX COMMUNICATIONS 671J MINERLWLLS TX
2012-03-20 979-266-6XXX U.S. TELEPACIFIC CORP. DBA TPX COMMUNICATIONS 671J CLTLKJCKSN TX
2012-03-20 979-358-5XXX U.S. TELEPACIFIC CORP. DBA TPX COMMUNICATIONS 671J WHARTON TX
2012-03-20 979-421-7XXX U.S. TELEPACIFIC CORP. DBA TPX COMMUNICATIONS 671J BRENHAM TX
2012-03-14 702-956-6XXX U.S. TELEPACIFIC CORP. DBA TPX COMMUNICATIONS 671J LAS VEGAS NV
2012-03-13 413-588-5XXX U.S. TELEPACIFIC CORP. DBA TPX COMMUNICATIONS 671J NORTHAMPTN MA
2012-03-07 760-919-9XXX U.S. TELEPACIFIC CORP. DBA TPX COMMUNICATIONS 671J IMPERIAL CA
2012-03-06 858-529-6XXX U.S. TELEPACIFIC CORP. DBA TPX COMMUNICATIONS 671J LA JOLLA CA
2012-03-06 949-800-1XXX U.S. TELEPACIFIC CORP. DBA TPX COMMUNICATIONS 671J IRVINE CA
2012-03-05 415-432-4XXX U.S. TELEPACIFIC CORP. DBA TPX COMMUNICATIONS 671J SNFC CNTRL CA
2012-02-17 415-426-6XXX U.S. TELEPACIFIC CORP. DBA TPX COMMUNICATIONS 671J SNFC CNTRL CA
2012-02-17 415-432-5XXX U.S. TELEPACIFIC CORP. DBA TPX COMMUNICATIONS 671J SNFC CNTRL CA
2012-02-17 626-467-9XXX U.S. TELEPACIFIC CORP. DBA TPX COMMUNICATIONS 671J SNGBLCNN CA
2012-02-15 702-815-2XXX U.S. TELEPACIFIC CORP. DBA TPX COMMUNICATIONS 671J LAS VEGAS NV
2012-02-14 650-426-6XXX U.S. TELEPACIFIC CORP. DBA TPX COMMUNICATIONS 671J MT VIEW CA
2012-02-14 805-318-4XXX U.S. TELEPACIFIC CORP. DBA TPX COMMUNICATIONS 671J CARPINTRIA CA
2012-02-14 909-705-4XXX U.S. TELEPACIFIC CORP. DBA TPX COMMUNICATIONS 671J MENTONE CA
2012-02-10 661-964-2XXX U.S. TELEPACIFIC CORP. DBA TPX COMMUNICATIONS 671J SNCA NHCS CA
2012-02-07 209-410-7XXX U.S. TELEPACIFIC CORP. DBA TPX COMMUNICATIONS 671J TURLOCK CA
2012-02-07 650-933-9XXX U.S. TELEPACIFIC CORP. DBA TPX COMMUNICATIONS 671J MT VIEW CA
2012-02-07 916-666-4XXX U.S. TELEPACIFIC CORP. DBA TPX COMMUNICATIONS 671J RSVL MAIN CA
2012-02-06 209-338-6XXX U.S. TELEPACIFIC CORP. DBA TPX COMMUNICATIONS 671J MODESTO CA
2012-01-06 413-512-5XXX U.S. TELEPACIFIC CORP. DBA TPX COMMUNICATIONS 671J GREENFIELD MA
2012-01-06 978-484-5XXX U.S. TELEPACIFIC CORP. DBA TPX COMMUNICATIONS 671J ROWLEY MA
2011-12-30 760-412-3XXX U.S. TELEPACIFIC CORP. DBA TPX COMMUNICATIONS 671J BRAWLEY CA
2011-12-29 909-332-6XXX U.S. TELEPACIFIC CORP. DBA TPX COMMUNICATIONS 671J S BERNDINO CA
2011-12-21 617-533-9XXX U.S. TELEPACIFIC CORP. DBA TPX COMMUNICATIONS 671J DORCHESTER MA
2011-12-21 707-387-3XXX U.S. TELEPACIFIC CORP. DBA TPX COMMUNICATIONS 671J SANTA ROSA CA
2011-12-20 530-433-2XXX U.S. TELEPACIFIC CORP. DBA TPX COMMUNICATIONS 671J CHICO CA
2011-12-16 209-940-5XXX U.S. TELEPACIFIC CORP. DBA TPX COMMUNICATIONS 671J STOCKTON CA
2011-12-16 408-638-8XXX U.S. TELEPACIFIC CORP. DBA TPX COMMUNICATIONS 671J SNJS WEST CA
2011-12-16 415-432-2XXX U.S. TELEPACIFIC CORP. DBA TPX COMMUNICATIONS 671J SNFC CNTRL 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.