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
2017-02-09 707-874-7XXX U.S. TELEPACIFIC CORP. DBA TPX COMMUNICATIONS 671J OCCIDENTAL CA
2017-02-09 949-543-2XXX U.S. TELEPACIFIC CORP. DBA TPX COMMUNICATIONS 671J IRVINE CA
2017-02-09 949-543-3XXX U.S. TELEPACIFIC CORP. DBA TPX COMMUNICATIONS 671J IRVINE CA
2017-02-02 530-539-6XXX U.S. TELEPACIFIC CORP. DBA TPX COMMUNICATIONS 671J SOUTHTAHOE CA
2017-01-12 508-895-5XXX U.S. TELEPACIFIC CORP. DBA TPX COMMUNICATIONS 671J BROCKTON MA
2016-12-29 323-994-5XXX U.S. TELEPACIFIC CORP. DBA TPX COMMUNICATIONS 671J LSAN DA 14 CA
2016-12-29 323-994-6XXX U.S. TELEPACIFIC CORP. DBA TPX COMMUNICATIONS 671J LSAN DA 14 CA
2016-11-23 916-892-2XXX U.S. TELEPACIFIC CORP. DBA TPX COMMUNICATIONS 671J ELK GROVE CA
2016-11-23 916-892-3XXX U.S. TELEPACIFIC CORP. DBA TPX COMMUNICATIONS 671J ELK GROVE CA
2016-11-16 442-297-5XXX U.S. TELEPACIFIC CORP. DBA TPX COMMUNICATIONS 671J EL CENTRO CA
2016-11-15 424-403-5XXX U.S. TELEPACIFIC CORP. DBA TPX COMMUNICATIONS 671J CMTN CMTN CA
2016-11-15 424-403-6XXX U.S. TELEPACIFIC CORP. DBA TPX COMMUNICATIONS 671J CMTN CMTN CA
2016-11-01 707-743-6XXX U.S. TELEPACIFIC CORP. DBA TPX COMMUNICATIONS 671J POTTER VLY CA
2016-10-27 707-518-7XXX U.S. TELEPACIFIC CORP. DBA TPX COMMUNICATIONS 671J WILLITS CA
2016-10-27 707-961-8XXX U.S. TELEPACIFIC CORP. DBA TPX COMMUNICATIONS 671J FORT BRAGG CA
2016-10-27 737-931-2XXX U.S. TELEPACIFIC CORP. DBA TPX COMMUNICATIONS 671J AUSTIN TX
2016-10-27 737-931-3XXX U.S. TELEPACIFIC CORP. DBA TPX COMMUNICATIONS 671J AUSTIN TX
2016-10-27 737-931-4XXX U.S. TELEPACIFIC CORP. DBA TPX COMMUNICATIONS 671J AUSTIN TX
2016-10-27 737-931-5XXX U.S. TELEPACIFIC CORP. DBA TPX COMMUNICATIONS 671J AUSTIN TX
2016-10-27 737-931-6XXX U.S. TELEPACIFIC CORP. DBA TPX COMMUNICATIONS 671J AUSTIN TX
2016-09-21 424-567-4XXX U.S. TELEPACIFIC CORP. DBA TPX COMMUNICATIONS 671J HAWTHORNE CA
2016-09-15 424-523-7XXX U.S. TELEPACIFIC CORP. DBA TPX COMMUNICATIONS 671J CULVERCITY CA
2016-09-15 707-955-8XXX U.S. TELEPACIFIC CORP. DBA TPX COMMUNICATIONS 671J HEALDSBURG CA
2016-09-01 424-319-2XXX U.S. TELEPACIFIC CORP. DBA TPX COMMUNICATIONS 671J CMTN GRDN CA
2016-08-16 469-687-2XXX U.S. TELEPACIFIC CORP. DBA TPX COMMUNICATIONS 671J DALLAS TX
2016-08-16 469-687-3XXX U.S. TELEPACIFIC CORP. DBA TPX COMMUNICATIONS 671J DALLAS TX
2016-08-16 469-687-4XXX U.S. TELEPACIFIC CORP. DBA TPX COMMUNICATIONS 671J DALLAS TX
2016-08-02 408-861-4XXX U.S. TELEPACIFIC CORP. DBA TPX COMMUNICATIONS 671J SNJS WEST CA
2016-08-02 408-878-2XXX U.S. TELEPACIFIC CORP. DBA TPX COMMUNICATIONS 671J SNJS WEST CA
2016-08-02 424-308-6XXX U.S. TELEPACIFIC CORP. DBA TPX COMMUNICATIONS 671J SAN PEDRO CA
2016-08-02 510-821-6XXX U.S. TELEPACIFIC CORP. DBA TPX COMMUNICATIONS 671J OKLD MN-PD CA
2016-08-02 510-821-7XXX U.S. TELEPACIFIC CORP. DBA TPX COMMUNICATIONS 671J OKLD MN-PD CA
2016-08-02 559-214-4XXX U.S. TELEPACIFIC CORP. DBA TPX COMMUNICATIONS 671J FRESNO CA
2016-08-02 628-241-3XXX U.S. TELEPACIFIC CORP. DBA TPX COMMUNICATIONS 671J SNFC JUNPR CA
2016-08-02 661-593-7XXX U.S. TELEPACIFIC CORP. DBA TPX COMMUNICATIONS 671J SNCA NHCS CA
2016-08-02 707-308-3XXX U.S. TELEPACIFIC CORP. DBA TPX COMMUNICATIONS 671J SANTA ROSA CA
2016-08-02 747-251-6XXX U.S. TELEPACIFIC CORP. DBA TPX COMMUNICATIONS 671J SNFN PACM CA
2016-08-02 916-280-2XXX U.S. TELEPACIFIC CORP. DBA TPX COMMUNICATIONS 671J ELK GROVE CA
2016-08-02 916-883-7XXX U.S. TELEPACIFIC CORP. DBA TPX COMMUNICATIONS 671J SCRM NORTH CA
2016-07-22 909-750-5XXX U.S. TELEPACIFIC CORP. DBA TPX COMMUNICATIONS 671J ONTARIO CA
2016-07-22 909-750-6XXX U.S. TELEPACIFIC CORP. DBA TPX COMMUNICATIONS 671J ONTARIO CA
2016-07-22 909-750-7XXX U.S. TELEPACIFIC CORP. DBA TPX COMMUNICATIONS 671J ONTARIO CA
2016-07-22 909-750-8XXX U.S. TELEPACIFIC CORP. DBA TPX COMMUNICATIONS 671J ONTARIO CA
2016-07-12 972-469-8XXX U.S. TELEPACIFIC CORP. DBA TPX COMMUNICATIONS 671J FRISCO TX
2016-06-16 805-953-4XXX U.S. TELEPACIFIC CORP. DBA TPX COMMUNICATIONS 671J THOUSAOAKS CA
2016-05-18 949-577-4XXX U.S. TELEPACIFIC CORP. DBA TPX COMMUNICATIONS 671J IRVINE CA
2016-05-18 949-577-5XXX U.S. TELEPACIFIC CORP. DBA TPX COMMUNICATIONS 671J IRVINE CA
2016-05-03 469-466-3XXX U.S. TELEPACIFIC CORP. DBA TPX COMMUNICATIONS 671J DALLAS TX
2016-04-26 510-707-5XXX U.S. TELEPACIFIC CORP. DBA TPX COMMUNICATIONS 671J OKLD TRNID CA
2016-04-26 626-467-7XXX U.S. TELEPACIFIC CORP. DBA TPX COMMUNICATIONS 671J SNGBLCNN 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.