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
Clear Download CSV ↓
Recent NPA-NXX prefix assignments
AssignedNPA-NXXAssigneeOCNRate centerState
858-217 U.S. TELEPACIFIC CORP. DBA TPX COMMUNICATIONS 671J RNCHOBRNDO CA
858-218 U.S. TELEPACIFIC CORP. DBA TPX COMMUNICATIONS 671J POWAY CA
858-300 U.S. TELEPACIFIC CORP. DBA TPX COMMUNICATIONS 671J SNDG LVTA CA
858-356 U.S. TELEPACIFIC CORP. DBA TPX COMMUNICATIONS 671J DEL MAR CA
858-376 U.S. TELEPACIFIC CORP. DBA TPX COMMUNICATIONS 671J RNCHOBRNDO CA
858-400 U.S. TELEPACIFIC CORP. DBA TPX COMMUNICATIONS 671J RNCHOSANFE CA
858-413 U.S. TELEPACIFIC CORP. DBA TPX COMMUNICATIONS 671J POWAY CA
858-432 U.S. TELEPACIFIC CORP. DBA TPX COMMUNICATIONS 671J RNCHOBRNDO CA
858-436 U.S. TELEPACIFIC CORP. DBA TPX COMMUNICATIONS 671J DEL MAR CA
858-444 U.S. TELEPACIFIC CORP. DBA TPX COMMUNICATIONS 671J SNDG MRMS CA
858-519 U.S. TELEPACIFIC CORP. DBA TPX COMMUNICATIONS 671J DEL MAR CA
858-564 U.S. TELEPACIFIC CORP. DBA TPX COMMUNICATIONS 671J SNDG MRMS CA
858-707 U.S. TELEPACIFIC CORP. DBA TPX COMMUNICATIONS 671J SNDG LVTA CA
858-713 U.S. TELEPACIFIC CORP. DBA TPX COMMUNICATIONS 671J LA JOLLA CA
858-751 U.S. TELEPACIFIC CORP. DBA TPX COMMUNICATIONS 671J SNDG LVTA CA
858-777 U.S. TELEPACIFIC CORP. DBA TPX COMMUNICATIONS 671J LA JOLLA CA
858-860 U.S. TELEPACIFIC CORP. DBA TPX COMMUNICATIONS 671J SNDG MRMS CA
858-866 U.S. TELEPACIFIC CORP. DBA TPX COMMUNICATIONS 671J LA JOLLA CA
858-869 U.S. TELEPACIFIC CORP. DBA TPX COMMUNICATIONS 671J LA JOLLA CA
858-875 U.S. TELEPACIFIC CORP. DBA TPX COMMUNICATIONS 671J LA JOLLA CA
909-230 U.S. TELEPACIFIC CORP. DBA TPX COMMUNICATIONS 671J ONTARIO CA
909-254 U.S. TELEPACIFIC CORP. DBA TPX COMMUNICATIONS 671J COLTON CA
909-287 U.S. TELEPACIFIC CORP. DBA TPX COMMUNICATIONS 671J CHINO CA
909-291 U.S. TELEPACIFIC CORP. DBA TPX COMMUNICATIONS 671J UPLAND CA
909-292 U.S. TELEPACIFIC CORP. DBA TPX COMMUNICATIONS 671J ONTARIO CA
909-373 U.S. TELEPACIFIC CORP. DBA TPX COMMUNICATIONS 671J UPLAND CA
909-434 U.S. TELEPACIFIC CORP. DBA TPX COMMUNICATIONS 671J FONTANA CA
909-524 U.S. TELEPACIFIC CORP. DBA TPX COMMUNICATIONS 671J POMONA CA
909-525 U.S. TELEPACIFIC CORP. DBA TPX COMMUNICATIONS 671J POMONA CA
909-542 U.S. TELEPACIFIC CORP. DBA TPX COMMUNICATIONS 671J CLAREMONT CA
909-568 U.S. TELEPACIFIC CORP. DBA TPX COMMUNICATIONS 671J CLAREMONT CA
909-573 U.S. TELEPACIFIC CORP. DBA TPX COMMUNICATIONS 671J CHINO CA
909-632 U.S. TELEPACIFIC CORP. DBA TPX COMMUNICATIONS 671J POMONA CA
909-635 U.S. TELEPACIFIC CORP. DBA TPX COMMUNICATIONS 671J ONTARIO CA
909-670 U.S. TELEPACIFIC CORP. DBA TPX COMMUNICATIONS 671J CLAREMONT CA
909-713 U.S. TELEPACIFIC CORP. DBA TPX COMMUNICATIONS 671J MARSHALL CA
909-718 U.S. TELEPACIFIC CORP. DBA TPX COMMUNICATIONS 671J DIAMONDBAR CA
909-746 U.S. TELEPACIFIC CORP. DBA TPX COMMUNICATIONS 671J RIALTO CA
909-747 U.S. TELEPACIFIC CORP. DBA TPX COMMUNICATIONS 671J REDLANDS CA
909-978 U.S. TELEPACIFIC CORP. DBA TPX COMMUNICATIONS 671J DIAMONDBAR CA
916-365 U.S. TELEPACIFIC CORP. DBA TPX COMMUNICATIONS 671J FOLSOM CA
916-418 U.S. TELEPACIFIC CORP. DBA TPX COMMUNICATIONS 671J SCRM NORTH CA
916-436 U.S. TELEPACIFIC CORP. DBA TPX COMMUNICATIONS 671J FAIR OAKS CA
916-437 U.S. TELEPACIFIC CORP. DBA TPX COMMUNICATIONS 671J SCRM NORTH CA
916-438 U.S. TELEPACIFIC CORP. DBA TPX COMMUNICATIONS 671J SCRM MAIN CA
916-609 U.S. TELEPACIFIC CORP. DBA TPX COMMUNICATIONS 671J SCRM NORTH CA
916-642 U.S. TELEPACIFIC CORP. DBA TPX COMMUNICATIONS 671J SCRM MAIN CA
916-903 U.S. TELEPACIFIC CORP. DBA TPX COMMUNICATIONS 671J FAIR OAKS CA
925-201 U.S. TELEPACIFIC CORP. DBA TPX COMMUNICATIONS 671J PLEASANTON CA
925-344 U.S. TELEPACIFIC CORP. DBA TPX COMMUNICATIONS 671J LIVERMORE 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.