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
Clear Download CSV ↓
Recent thousands-block assignments
AssignedBlockAssigneeOCNRate centerState
2011-10-17 424-276-4XXX U.S. TELEPACIFIC CORP. DBA TPX COMMUNICATIONS 671J W ANGELES CA
2011-10-12 508-964-5XXX U.S. TELEPACIFIC CORP. DBA TPX COMMUNICATIONS 671J MANSFIELD MA
2011-10-12 714-987-6XXX U.S. TELEPACIFIC CORP. DBA TPX COMMUNICATIONS 671J BREA CA
2011-10-05 413-355-5XXX U.S. TELEPACIFIC CORP. DBA TPX COMMUNICATIONS 671J SPRINGFLD MA
2011-09-19 760-827-6XXX U.S. TELEPACIFIC CORP. DBA TPX COMMUNICATIONS 671J OCSD CRLS CA
2011-09-19 818-869-5XXX U.S. TELEPACIFIC CORP. DBA TPX COMMUNICATIONS 671J SNFN PACM CA
2011-09-19 951-373-5XXX U.S. TELEPACIFIC CORP. DBA TPX COMMUNICATIONS 671J ARLINGTON CA
2011-09-02 909-500-7XXX U.S. TELEPACIFIC CORP. DBA TPX COMMUNICATIONS 671J CALIMESA CA
2011-09-02 951-292-5XXX U.S. TELEPACIFIC CORP. DBA TPX COMMUNICATIONS 671J HEMT SNJC CA
2011-08-23 209-205-2XXX U.S. TELEPACIFIC CORP. DBA TPX COMMUNICATIONS 671J MERCED CA
2011-08-22 408-477-7XXX U.S. TELEPACIFIC CORP. DBA TPX COMMUNICATIONS 671J SNJS WEST CA
2011-08-22 424-281-5XXX U.S. TELEPACIFIC CORP. DBA TPX COMMUNICATIONS 671J BEVERLYHLS CA
2011-08-22 805-250-2XXX U.S. TELEPACIFIC CORP. DBA TPX COMMUNICATIONS 671J SNLUSOBSPO CA
2011-08-22 916-394-5XXX U.S. TELEPACIFIC CORP. DBA TPX COMMUNICATIONS 671J SCRM MAIN CA
2011-08-19 805-330-8XXX U.S. TELEPACIFIC CORP. DBA TPX COMMUNICATIONS 671J OXNARD CA
2011-08-11 415-906-8XXX U.S. TELEPACIFIC CORP. DBA TPX COMMUNICATIONS 671J SNFC CNTRL CA
2011-08-11 415-926-6XXX U.S. TELEPACIFIC CORP. DBA TPX COMMUNICATIONS 671J SNFC CNTRL CA
2011-08-09 310-853-7XXX U.S. TELEPACIFIC CORP. DBA TPX COMMUNICATIONS 671J CULVERCITY CA
2011-08-09 805-622-6XXX U.S. TELEPACIFIC CORP. DBA TPX COMMUNICATIONS 671J CONEJO CA
2011-08-04 661-401-2XXX U.S. TELEPACIFIC CORP. DBA TPX COMMUNICATIONS 671J BKFD MAIN CA
2011-08-04 707-547-3XXX U.S. TELEPACIFIC CORP. DBA TPX COMMUNICATIONS 671J SANTA ROSA CA
2011-08-04 831-287-2XXX U.S. TELEPACIFIC CORP. DBA TPX COMMUNICATIONS 671J SALINAS CA
2011-08-04 858-242-5XXX U.S. TELEPACIFIC CORP. DBA TPX COMMUNICATIONS 671J LA JOLLA CA
2011-08-03 209-661-8XXX U.S. TELEPACIFIC CORP. DBA TPX COMMUNICATIONS 671J MODESTO CA
2011-08-03 510-433-8XXX U.S. TELEPACIFIC CORP. DBA TPX COMMUNICATIONS 671J OKLD MN-PD CA
2011-08-03 530-418-3XXX U.S. TELEPACIFIC CORP. DBA TPX COMMUNICATIONS 671J NORTH YUBA CA
2011-08-03 530-652-2XXX U.S. TELEPACIFIC CORP. DBA TPX COMMUNICATIONS 671J GRVY SOUTH CA
2011-07-25 415-266-1XXX U.S. TELEPACIFIC CORP. DBA TPX COMMUNICATIONS 671J SNFC CNTRL CA
2011-07-25 415-266-3XXX U.S. TELEPACIFIC CORP. DBA TPX COMMUNICATIONS 671J SNFC CNTRL CA
2011-07-25 415-266-5XXX U.S. TELEPACIFIC CORP. DBA TPX COMMUNICATIONS 671J SNFC CNTRL CA
2011-07-25 415-266-6XXX U.S. TELEPACIFIC CORP. DBA TPX COMMUNICATIONS 671J SNFC CNTRL CA
2011-07-25 415-266-7XXX U.S. TELEPACIFIC CORP. DBA TPX COMMUNICATIONS 671J SNFC CNTRL CA
2011-07-25 415-266-8XXX U.S. TELEPACIFIC CORP. DBA TPX COMMUNICATIONS 671J SNFC CNTRL CA
2011-07-25 415-266-9XXX U.S. TELEPACIFIC CORP. DBA TPX COMMUNICATIONS 671J SNFC CNTRL CA
2011-06-20 702-724-7XXX U.S. TELEPACIFIC CORP. DBA TPX COMMUNICATIONS 671J LAS VEGAS NV
2011-06-16 424-269-3XXX U.S. TELEPACIFIC CORP. DBA TPX COMMUNICATIONS 671J HAWTHORNE CA
2011-06-14 702-724-2XXX U.S. TELEPACIFIC CORP. DBA TPX COMMUNICATIONS 671J LAS VEGAS NV
2011-05-12 209-779-3XXX U.S. TELEPACIFIC CORP. DBA TPX COMMUNICATIONS 671J HUGHSON CA
2011-05-10 978-788-6XXX U.S. TELEPACIFIC CORP. DBA TPX COMMUNICATIONS 671J LOWELL MA
2011-05-10 978-856-6XXX U.S. TELEPACIFIC CORP. DBA TPX COMMUNICATIONS 671J LOWELL MA
2011-05-09 781-482-5XXX U.S. TELEPACIFIC CORP. DBA TPX COMMUNICATIONS 671J LEXINGTON MA
2011-05-09 781-482-8XXX U.S. TELEPACIFIC CORP. DBA TPX COMMUNICATIONS 671J LEXINGTON MA
2011-05-06 559-537-7XXX U.S. TELEPACIFIC CORP. DBA TPX COMMUNICATIONS 671J HANFORD CA
2011-05-05 559-348-5XXX U.S. TELEPACIFIC CORP. DBA TPX COMMUNICATIONS 671J FRESNO CA
2011-05-03 415-857-6XXX U.S. TELEPACIFIC CORP. DBA TPX COMMUNICATIONS 671J SNFC CNTRL CA
2011-05-03 415-857-8XXX U.S. TELEPACIFIC CORP. DBA TPX COMMUNICATIONS 671J SNFC CNTRL CA
2011-04-20 530-457-3XXX U.S. TELEPACIFIC CORP. DBA TPX COMMUNICATIONS 671J GEORGETOWN CA
2011-04-20 805-325-4XXX U.S. TELEPACIFIC CORP. DBA TPX COMMUNICATIONS 671J SANTA YNEZ CA
2011-04-20 805-430-7XXX U.S. TELEPACIFIC CORP. DBA TPX COMMUNICATIONS 671J LOMPOC CA
2011-04-18 530-239-6XXX U.S. TELEPACIFIC CORP. DBA TPX COMMUNICATIONS 671J MT SHASTA 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.