NumberResearch Membership · Data 09/18/2026

Recent prefix assignments

11 prefixes assigned in the last 30 days · from the daily NANPA CO code file, 09/18/2026

Full prefixes (NXX) Thousands-blocks (1,000-number pools)

Which carriers received which NPA-NXX prefixes, and where. Assignments are initial assignments from NANPA records — because of number portability, the current serving carrier of individual numbers may differ. For finer-grained activity, see the thousands-block view above.

Most active assignees, last 30 days
U.S. TELEPACIFIC CORP. DBA TPX COMMUNICATIONS 11
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 NPA-NXX prefix assignments
AssignedNPA-NXXAssigneeOCNRate centerState
562-285 U.S. TELEPACIFIC CORP. DBA TPX COMMUNICATIONS 671J LONG BEACH CA
562-287 U.S. TELEPACIFIC CORP. DBA TPX COMMUNICATIONS 671J DOWNEY CA
562-333 U.S. TELEPACIFIC CORP. DBA TPX COMMUNICATIONS 671J CMTN CMTN CA
562-334 U.S. TELEPACIFIC CORP. DBA TPX COMMUNICATIONS 671J DOWNEY CA
562-344 U.S. TELEPACIFIC CORP. DBA TPX COMMUNICATIONS 671J ALAMITOS CA
562-354 U.S. TELEPACIFIC CORP. DBA TPX COMMUNICATIONS 671J LAKEWOOD CA
562-398 U.S. TELEPACIFIC CORP. DBA TPX COMMUNICATIONS 671J CMTN CMTN CA
562-444 U.S. TELEPACIFIC CORP. DBA TPX COMMUNICATIONS 671J LAKEWOOD CA
562-446 U.S. TELEPACIFIC CORP. DBA TPX COMMUNICATIONS 671J ALAMITOS CA
562-475 U.S. TELEPACIFIC CORP. DBA TPX COMMUNICATIONS 671J LA HABRA CA
562-485 U.S. TELEPACIFIC CORP. DBA TPX COMMUNICATIONS 671J LONG BEACH CA
562-501 U.S. TELEPACIFIC CORP. DBA TPX COMMUNICATIONS 671J LA HABRA CA
562-568 U.S. TELEPACIFIC CORP. DBA TPX COMMUNICATIONS 671J PICORIVERA CA
562-676 U.S. TELEPACIFIC CORP. DBA TPX COMMUNICATIONS 671J LONG BEACH CA
562-677 U.S. TELEPACIFIC CORP. DBA TPX COMMUNICATIONS 671J NORWALK CA
562-719 U.S. TELEPACIFIC CORP. DBA TPX COMMUNICATIONS 671J ALAMITOS CA
562-745 U.S. TELEPACIFIC CORP. DBA TPX COMMUNICATIONS 671J DOWNEY CA
562-758 U.S. TELEPACIFIC CORP. DBA TPX COMMUNICATIONS 671J WHITTIER CA
562-774 U.S. TELEPACIFIC CORP. DBA TPX COMMUNICATIONS 671J DOWNEY CA
562-775 U.S. TELEPACIFIC CORP. DBA TPX COMMUNICATIONS 671J CMTN CMTN CA
562-781 U.S. TELEPACIFIC CORP. DBA TPX COMMUNICATIONS 671J WHITTIER CA
562-977 U.S. TELEPACIFIC CORP. DBA TPX COMMUNICATIONS 671J NORWALK CA
562-999 U.S. TELEPACIFIC CORP. DBA TPX COMMUNICATIONS 671J LONG BEACH CA
617-674 U.S. TELEPACIFIC CORP. DBA TPX COMMUNICATIONS 671J CAMBRIDGE MA
619-308 U.S. TELEPACIFIC CORP. DBA TPX COMMUNICATIONS 671J SNDG SNDG CA
619-325 U.S. TELEPACIFIC CORP. DBA TPX COMMUNICATIONS 671J SNDG SNDG CA
619-326 U.S. TELEPACIFIC CORP. DBA TPX COMMUNICATIONS 671J SNDG SNDG CA
619-350 U.S. TELEPACIFIC CORP. DBA TPX COMMUNICATIONS 671J JACUMBA CA
619-387 U.S. TELEPACIFIC CORP. DBA TPX COMMUNICATIONS 671J EL CAJON CA
619-388 U.S. TELEPACIFIC CORP. DBA TPX COMMUNICATIONS 671J LA MESA CA
619-398 U.S. TELEPACIFIC CORP. DBA TPX COMMUNICATIONS 671J SNDG SNDG CA
619-433 U.S. TELEPACIFIC CORP. DBA TPX COMMUNICATIONS 671J LA MESA CA
619-554 U.S. TELEPACIFIC CORP. DBA TPX COMMUNICATIONS 671J CORONADO CA
619-591 U.S. TELEPACIFIC CORP. DBA TPX COMMUNICATIONS 671J CHULAVISTA CA
619-631 U.S. TELEPACIFIC CORP. DBA TPX COMMUNICATIONS 671J EL CAJON CA
619-719 U.S. TELEPACIFIC CORP. DBA TPX COMMUNICATIONS 671J SNDG SNDG CA
619-734 U.S. TELEPACIFIC CORP. DBA TPX COMMUNICATIONS 671J CHULAVISTA CA
619-773 U.S. TELEPACIFIC CORP. DBA TPX COMMUNICATIONS 671J NATIONALCY CA
619-797 U.S. TELEPACIFIC CORP. DBA TPX COMMUNICATIONS 671J LA MESA CA
619-814 U.S. TELEPACIFIC CORP. DBA TPX COMMUNICATIONS 671J SNDG SNDG CA
619-827 U.S. TELEPACIFIC CORP. DBA TPX COMMUNICATIONS 671J CHULAVISTA CA
619-841 U.S. TELEPACIFIC CORP. DBA TPX COMMUNICATIONS 671J CORONADO CA
619-873 U.S. TELEPACIFIC CORP. DBA TPX COMMUNICATIONS 671J EL CAJON CA
619-961 U.S. TELEPACIFIC CORP. DBA TPX COMMUNICATIONS 671J SNDG SNDG CA
626-204 U.S. TELEPACIFIC CORP. DBA TPX COMMUNICATIONS 671J PSDN PSDN CA
626-214 U.S. TELEPACIFIC CORP. DBA TPX COMMUNICATIONS 671J COVINA CA
626-219 U.S. TELEPACIFIC CORP. DBA TPX COMMUNICATIONS 671J PSDN PSDN CA
626-246 U.S. TELEPACIFIC CORP. DBA TPX COMMUNICATIONS 671J EL MONTE CA
626-247 U.S. TELEPACIFIC CORP. DBA TPX COMMUNICATIONS 671J ARCADIA CA
626-248 U.S. TELEPACIFIC CORP. DBA TPX COMMUNICATIONS 671J ALHAMBRA CA

Source: NANPA CO Code Assignments (Utilized, All States, Public), file date 09/18/2026 — Tier A primary source, refreshed on every import. Viewing is free; bulk downloads require a membership.