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
2020-07-15 925-410-8XXX U.S. TELEPACIFIC CORP. DBA TPX COMMUNICATIONS 671J PLEASANTON CA
2020-07-15 925-410-9XXX U.S. TELEPACIFIC CORP. DBA TPX COMMUNICATIONS 671J PLEASANTON CA
2020-01-25 781-755-4XXX U.S. TELEPACIFIC CORP. DBA TPX COMMUNICATIONS 671J WALTHAM MA
2019-11-26 737-256-3XXX U.S. TELEPACIFIC CORP. DBA TPX COMMUNICATIONS 671J AUSTIN TX
2019-11-22 737-256-4XXX U.S. TELEPACIFIC CORP. DBA TPX COMMUNICATIONS 671J AUSTIN TX
2019-11-22 737-256-5XXX U.S. TELEPACIFIC CORP. DBA TPX COMMUNICATIONS 671J AUSTIN TX
2019-11-05 469-564-7XXX U.S. TELEPACIFIC CORP. DBA TPX COMMUNICATIONS 671J VENUS TX
2019-07-08 760-424-7XXX U.S. TELEPACIFIC CORP. DBA TPX COMMUNICATIONS 671J PALM SPG CA
2019-06-26 469-627-9XXX U.S. TELEPACIFIC CORP. DBA TPX COMMUNICATIONS 671J DALLAS TX
2019-05-16 858-293-2XXX U.S. TELEPACIFIC CORP. DBA TPX COMMUNICATIONS 671J SNDG MRMS CA
2019-05-16 858-293-3XXX U.S. TELEPACIFIC CORP. DBA TPX COMMUNICATIONS 671J SNDG MRMS CA
2019-05-14 949-561-4XXX U.S. TELEPACIFIC CORP. DBA TPX COMMUNICATIONS 671J IRVINE CA
2019-05-14 949-561-5XXX U.S. TELEPACIFIC CORP. DBA TPX COMMUNICATIONS 671J IRVINE CA
2019-04-08 559-605-3XXX U.S. TELEPACIFIC CORP. DBA TPX COMMUNICATIONS 671J TULARE CA
2019-03-19 530-599-7XXX U.S. TELEPACIFIC CORP. DBA TPX COMMUNICATIONS 671J MARYSVILLE CA
2019-03-19 909-616-4XXX U.S. TELEPACIFIC CORP. DBA TPX COMMUNICATIONS 671J DIAMONDBAR CA
2019-03-19 916-737-2XXX U.S. TELEPACIFIC CORP. DBA TPX COMMUNICATIONS 671J SCRM MAIN CA
2019-03-06 949-443-8XXX U.S. TELEPACIFIC CORP. DBA TPX COMMUNICATIONS 671J CAPITRNVLY CA
2018-11-30 469-497-3XXX U.S. TELEPACIFIC CORP. DBA TPX COMMUNICATIONS 671J PLANO TX
2018-11-20 530-450-7XXX U.S. TELEPACIFIC CORP. DBA TPX COMMUNICATIONS 671J AUBN MAIN CA
2018-10-19 530-607-2XXX U.S. TELEPACIFIC CORP. DBA TPX COMMUNICATIONS 671J WHEATLAND CA
2018-09-26 346-328-4XXX U.S. TELEPACIFIC CORP. DBA TPX COMMUNICATIONS 671J SPRING TX
2018-09-26 530-642-6XXX U.S. TELEPACIFIC CORP. DBA TPX COMMUNICATIONS 671J PLVL WEST CA
2018-07-03 424-417-4XXX U.S. TELEPACIFIC CORP. DBA TPX COMMUNICATIONS 671J SAN PEDRO CA
2018-07-03 424-417-5XXX U.S. TELEPACIFIC CORP. DBA TPX COMMUNICATIONS 671J SAN PEDRO CA
2018-05-23 323-827-6XXX U.S. TELEPACIFIC CORP. DBA TPX COMMUNICATIONS 671J MONTEBELLO CA
2018-05-23 323-853-4XXX U.S. TELEPACIFIC CORP. DBA TPX COMMUNICATIONS 671J MONTEBELLO CA
2018-03-27 661-458-2XXX U.S. TELEPACIFIC CORP. DBA TPX COMMUNICATIONS 671J MCFARLAND CA
2018-03-22 323-955-7XXX U.S. TELEPACIFIC CORP. DBA TPX COMMUNICATIONS 671J LSAN DA 13 CA
2018-03-19 510-607-3XXX U.S. TELEPACIFIC CORP. DBA TPX COMMUNICATIONS 671J OKLD MN-PD CA
2018-03-19 510-607-4XXX U.S. TELEPACIFIC CORP. DBA TPX COMMUNICATIONS 671J OKLD MN-PD CA
2018-02-20 805-515-1XXX U.S. TELEPACIFIC CORP. DBA TPX COMMUNICATIONS 671J VNTRA CNTL CA
2018-02-05 707-617-5XXX U.S. TELEPACIFIC CORP. DBA TPX COMMUNICATIONS 671J FORTUNA CA
2018-02-02 323-530-5XXX U.S. TELEPACIFIC CORP. DBA TPX COMMUNICATIONS 671J MONTEBELLO CA
2018-02-02 949-404-6XXX U.S. TELEPACIFIC CORP. DBA TPX COMMUNICATIONS 671J IRVINE CA
2018-02-02 949-404-8XXX U.S. TELEPACIFIC CORP. DBA TPX COMMUNICATIONS 671J IRVINE CA
2017-11-27 469-697-5XXX U.S. TELEPACIFIC CORP. DBA TPX COMMUNICATIONS 671J DALLAS TX
2017-11-27 469-791-7XXX U.S. TELEPACIFIC CORP. DBA TPX COMMUNICATIONS 671J DALLAS TX
2017-10-05 951-758-7XXX U.S. TELEPACIFIC CORP. DBA TPX COMMUNICATIONS 671J RIVERSIDE CA
2017-09-22 916-368-5XXX U.S. TELEPACIFIC CORP. DBA TPX COMMUNICATIONS 671J SCRM MAIN CA
2017-09-18 760-528-4XXX U.S. TELEPACIFIC CORP. DBA TPX COMMUNICATIONS 671J HOLTVILLE CA
2017-09-14 442-208-2XXX U.S. TELEPACIFIC CORP. DBA TPX COMMUNICATIONS 671J CALIPATRIA CA
2017-09-13 909-408-1XXX U.S. TELEPACIFIC CORP. DBA TPX COMMUNICATIONS 671J ONTARIO CA
2017-09-05 209-748-3XXX U.S. TELEPACIFIC CORP. DBA TPX COMMUNICATIONS 671J HERALD CA
2017-08-31 818-600-5XXX U.S. TELEPACIFIC CORP. DBA TPX COMMUNICATIONS 671J RESEDA CA
2017-08-31 951-758-4XXX U.S. TELEPACIFIC CORP. DBA TPX COMMUNICATIONS 671J RIVERSIDE CA
2017-08-18 559-405-6XXX U.S. TELEPACIFIC CORP. DBA TPX COMMUNICATIONS 671J DEL REY CA
2017-08-15 442-285-3XXX U.S. TELEPACIFIC CORP. DBA TPX COMMUNICATIONS 671J CALIFORNCY CA
2017-08-14 530-337-3XXX U.S. TELEPACIFIC CORP. DBA TPX COMMUNICATIONS 671J MONTGOYCRK CA
2017-08-14 559-527-7XXX U.S. TELEPACIFIC CORP. DBA TPX COMMUNICATIONS 671J TERRABELLA 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.