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
2014-09-15 909-478-8XXX U.S. TELEPACIFIC CORP. DBA TPX COMMUNICATIONS 671J REDLANDS CA
2014-09-10 424-344-7XXX U.S. TELEPACIFIC CORP. DBA TPX COMMUNICATIONS 671J CMTN GRDN CA
2014-09-10 510-838-3XXX U.S. TELEPACIFIC CORP. DBA TPX COMMUNICATIONS 671J OKLD FRTVL CA
2014-09-10 559-391-2XXX U.S. TELEPACIFIC CORP. DBA TPX COMMUNICATIONS 671J REEDLEY CA
2014-09-10 562-548-6XXX U.S. TELEPACIFIC CORP. DBA TPX COMMUNICATIONS 671J LONG BEACH CA
2014-09-10 650-665-8XXX U.S. TELEPACIFIC CORP. DBA TPX COMMUNICATIONS 671J PALO ALTO CA
2014-09-10 805-280-4XXX U.S. TELEPACIFIC CORP. DBA TPX COMMUNICATIONS 671J SANBARBARA CA
2014-09-10 858-291-4XXX U.S. TELEPACIFIC CORP. DBA TPX COMMUNICATIONS 671J LA JOLLA CA
2014-09-10 916-634-7XXX U.S. TELEPACIFIC CORP. DBA TPX COMMUNICATIONS 671J SCRM NORTH CA
2014-09-04 805-919-2XXX U.S. TELEPACIFIC CORP. DBA TPX COMMUNICATIONS 671J EL RIO CA
2014-08-26 424-362-2XXX U.S. TELEPACIFIC CORP. DBA TPX COMMUNICATIONS 671J BEVERLYHLS CA
2014-08-22 510-953-7XXX U.S. TELEPACIFIC CORP. DBA TPX COMMUNICATIONS 671J FRNK MAIN CA
2014-08-22 858-503-8XXX U.S. TELEPACIFIC CORP. DBA TPX COMMUNICATIONS 671J SNDG LVTA CA
2014-08-21 916-805-2XXX U.S. TELEPACIFIC CORP. DBA TPX COMMUNICATIONS 671J FOLSOM CA
2014-08-18 949-537-7XXX U.S. TELEPACIFIC CORP. DBA TPX COMMUNICATIONS 671J IRVINE CA
2014-08-11 818-940-2XXX U.S. TELEPACIFIC CORP. DBA TPX COMMUNICATIONS 671J BRBN BRBN CA
2014-08-11 818-940-3XXX U.S. TELEPACIFIC CORP. DBA TPX COMMUNICATIONS 671J BRBN BRBN CA
2014-08-01 559-632-8XXX U.S. TELEPACIFIC CORP. DBA TPX COMMUNICATIONS 671J RIVERDALE CA
2014-07-23 559-403-7XXX U.S. TELEPACIFIC CORP. DBA TPX COMMUNICATIONS 671J CARUTHERS CA
2014-07-23 559-543-3XXX U.S. TELEPACIFIC CORP. DBA TPX COMMUNICATIONS 671J HURON CA
2014-07-14 661-768-7XXX U.S. TELEPACIFIC CORP. DBA TPX COMMUNICATIONS 671J TAFT CA
2014-06-30 424-365-7XXX U.S. TELEPACIFIC CORP. DBA TPX COMMUNICATIONS 671J W ANGELES CA
2014-06-30 559-558-4XXX U.S. TELEPACIFIC CORP. DBA TPX COMMUNICATIONS 671J FRESNO CA
2014-06-30 669-236-8XXX U.S. TELEPACIFIC CORP. DBA TPX COMMUNICATIONS 671J SNJS WEST CA
2014-06-30 707-397-8XXX U.S. TELEPACIFIC CORP. DBA TPX COMMUNICATIONS 671J MENDOCINO CA
2014-06-18 424-347-5XXX U.S. TELEPACIFIC CORP. DBA TPX COMMUNICATIONS 671J LOMITA CA
2014-06-18 818-938-5XXX U.S. TELEPACIFIC CORP. DBA TPX COMMUNICATIONS 671J RESEDA CA
2014-06-18 818-946-3XXX U.S. TELEPACIFIC CORP. DBA TPX COMMUNICATIONS 671J VAN NUYS CA
2014-06-18 951-396-2XXX U.S. TELEPACIFIC CORP. DBA TPX COMMUNICATIONS 671J ARLINGTON CA
2014-06-17 530-650-4XXX U.S. TELEPACIFIC CORP. DBA TPX COMMUNICATIONS 671J WOODLAND CA
2014-06-16 530-491-5XXX U.S. TELEPACIFIC CORP. DBA TPX COMMUNICATIONS 671J MARYSVILLE CA
2014-06-11 978-783-5XXX U.S. TELEPACIFIC CORP. DBA TPX COMMUNICATIONS 671J ANDOVER MA
2014-06-10 424-321-2XXX U.S. TELEPACIFIC CORP. DBA TPX COMMUNICATIONS 671J EL SEGUNDO CA
2014-06-09 530-794-3XXX U.S. TELEPACIFIC CORP. DBA TPX COMMUNICATIONS 671J WINTERS CA
2014-06-05 424-345-8XXX U.S. TELEPACIFIC CORP. DBA TPX COMMUNICATIONS 671J CULVERCITY CA
2014-06-04 707-724-5XXX U.S. TELEPACIFIC CORP. DBA TPX COMMUNICATIONS 671J VACAVILLE CA
2014-05-30 760-884-5XXX U.S. TELEPACIFIC CORP. DBA TPX COMMUNICATIONS 671J ESCONDIDO CA
2014-05-23 415-660-2XXX U.S. TELEPACIFIC CORP. DBA TPX COMMUNICATIONS 671J SNFC CNTRL CA
2014-05-23 415-660-3XXX U.S. TELEPACIFIC CORP. DBA TPX COMMUNICATIONS 671J SNFC CNTRL CA
2014-05-23 858-281-6XXX U.S. TELEPACIFIC CORP. DBA TPX COMMUNICATIONS 671J LA JOLLA CA
2014-05-22 512-960-8XXX U.S. TELEPACIFIC CORP. DBA TPX COMMUNICATIONS 671J AUSTIN TX
2014-05-21 209-857-4XXX U.S. TELEPACIFIC CORP. DBA TPX COMMUNICATIONS 671J MODESTO CA
2014-05-21 619-930-5XXX U.S. TELEPACIFIC CORP. DBA TPX COMMUNICATIONS 671J SNDG SNDG CA
2014-05-15 818-792-5XXX U.S. TELEPACIFIC CORP. DBA TPX COMMUNICATIONS 671J SNFN SNFN CA
2014-05-14 818-639-5XXX U.S. TELEPACIFIC CORP. DBA TPX COMMUNICATIONS 671J SNFN SNFN CA
2014-05-07 818-965-2XXX U.S. TELEPACIFIC CORP. DBA TPX COMMUNICATIONS 671J CANOGAPARK CA
2014-05-07 818-965-5XXX U.S. TELEPACIFIC CORP. DBA TPX COMMUNICATIONS 671J CANOGAPARK CA
2014-05-07 818-965-7XXX U.S. TELEPACIFIC CORP. DBA TPX COMMUNICATIONS 671J CANOGAPARK CA
2014-05-07 818-965-8XXX U.S. TELEPACIFIC CORP. DBA TPX COMMUNICATIONS 671J CANOGAPARK CA
2014-04-28 415-985-3XXX U.S. TELEPACIFIC CORP. DBA TPX COMMUNICATIONS 671J NOVATO 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.