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
415-755 U.S. TELEPACIFIC CORP. DBA TPX COMMUNICATIONS 671J SAN RAFAEL CA
415-758 U.S. TELEPACIFIC CORP. DBA TPX COMMUNICATIONS 671J CORTEMADRA CA
415-820 U.S. TELEPACIFIC CORP. DBA TPX COMMUNICATIONS 671J SNFC CNTRL CA
415-825 U.S. TELEPACIFIC CORP. DBA TPX COMMUNICATIONS 671J SNFC JUNPR CA
415-829 U.S. TELEPACIFIC CORP. DBA TPX COMMUNICATIONS 671J SNFC CNTRL CA
415-937 U.S. TELEPACIFIC CORP. DBA TPX COMMUNICATIONS 671J BELVEDERE CA
469-637 U.S. TELEPACIFIC CORP. DBA TPX COMMUNICATIONS 671J LEWISVILLE TX
510-239 U.S. TELEPACIFIC CORP. DBA TPX COMMUNICATIONS 671J OKLD ALMD CA
510-300 U.S. TELEPACIFIC CORP. DBA TPX COMMUNICATIONS 671J HAYWARD CA
510-342 U.S. TELEPACIFIC CORP. DBA TPX COMMUNICATIONS 671J HAYWARD CA
510-343 U.S. TELEPACIFIC CORP. DBA TPX COMMUNICATIONS 671J OKLD TRNID CA
510-401 U.S. TELEPACIFIC CORP. DBA TPX COMMUNICATIONS 671J FRNK GRNLF CA
510-403 U.S. TELEPACIFIC CORP. DBA TPX COMMUNICATIONS 671J FRNK OLIVR CA
510-456 U.S. TELEPACIFIC CORP. DBA TPX COMMUNICATIONS 671J FRNK MAIN CA
510-463 U.S. TELEPACIFIC CORP. DBA TPX COMMUNICATIONS 671J OKLD MN-PD CA
510-496 U.S. TELEPACIFIC CORP. DBA TPX COMMUNICATIONS 671J OKLD MN-PD CA
510-585 U.S. TELEPACIFIC CORP. DBA TPX COMMUNICATIONS 671J FRNK MAIN CA
510-698 U.S. TELEPACIFIC CORP. DBA TPX COMMUNICATIONS 671J OKLD FRTVL CA
510-809 U.S. TELEPACIFIC CORP. DBA TPX COMMUNICATIONS 671J OKLD BKLY CA
510-859 U.S. TELEPACIFIC CORP. DBA TPX COMMUNICATIONS 671J OKLD BKLY CA
510-940 U.S. TELEPACIFIC CORP. DBA TPX COMMUNICATIONS 671J HAYWARD CA
510-995 U.S. TELEPACIFIC CORP. DBA TPX COMMUNICATIONS 671J OKLD ALMD CA
512-229 U.S. TELEPACIFIC CORP. DBA TPX COMMUNICATIONS 671J ELGIN TX
512-381 U.S. TELEPACIFIC CORP. DBA TPX COMMUNICATIONS 671J AUSTIN TX
512-678 U.S. TELEPACIFIC CORP. DBA TPX COMMUNICATIONS 671J BASTROP TX
512-735 U.S. TELEPACIFIC CORP. DBA TPX COMMUNICATIONS 671J AUSTIN TX
513-330 U.S. TELEPACIFIC CORP. DBA TPX COMMUNICATIONS 671J HAMILTON OH
530-402 U.S. TELEPACIFIC CORP. DBA TPX COMMUNICATIONS 671J WOODLAND CA
530-760 U.S. TELEPACIFIC CORP. DBA TPX COMMUNICATIONS 671J DAVIS CA
559-212 U.S. TELEPACIFIC CORP. DBA TPX COMMUNICATIONS 671J HANFORD CA
559-320 U.S. TELEPACIFIC CORP. DBA TPX COMMUNICATIONS 671J FRESNO CA
559-329 U.S. TELEPACIFIC CORP. DBA TPX COMMUNICATIONS 671J TULARE CA
559-334 U.S. TELEPACIFIC CORP. DBA TPX COMMUNICATIONS 671J VISALIA CA
559-339 U.S. TELEPACIFIC CORP. DBA TPX COMMUNICATIONS 671J PORTERVL CA
562-204 U.S. TELEPACIFIC CORP. DBA TPX COMMUNICATIONS 671J WHITTIER CA
562-205 U.S. TELEPACIFIC CORP. DBA TPX COMMUNICATIONS 671J PICORIVERA CA
562-207 U.S. TELEPACIFIC CORP. DBA TPX COMMUNICATIONS 671J NORWALK CA
562-213 U.S. TELEPACIFIC CORP. DBA TPX COMMUNICATIONS 671J LAKEWOOD CA
562-216 U.S. TELEPACIFIC CORP. DBA TPX COMMUNICATIONS 671J LONG BEACH CA
562-231 U.S. TELEPACIFIC CORP. DBA TPX COMMUNICATIONS 671J DOWNEY CA
562-232 U.S. TELEPACIFIC CORP. DBA TPX COMMUNICATIONS 671J CMTN CMTN CA
562-236 U.S. TELEPACIFIC CORP. DBA TPX COMMUNICATIONS 671J WHITTIER CA
562-246 U.S. TELEPACIFIC CORP. DBA TPX COMMUNICATIONS 671J NORWALK CA
562-250 U.S. TELEPACIFIC CORP. DBA TPX COMMUNICATIONS 671J DOWNEY CA
562-251 U.S. TELEPACIFIC CORP. DBA TPX COMMUNICATIONS 671J CMTN CMTN CA
562-263 U.S. TELEPACIFIC CORP. DBA TPX COMMUNICATIONS 671J NORWALK CA
562-277 U.S. TELEPACIFIC CORP. DBA TPX COMMUNICATIONS 671J LONG BEACH CA
562-280 U.S. TELEPACIFIC CORP. DBA TPX COMMUNICATIONS 671J ALAMITOS CA
562-282 U.S. TELEPACIFIC CORP. DBA TPX COMMUNICATIONS 671J NORWALK CA
562-283 U.S. TELEPACIFIC CORP. DBA TPX COMMUNICATIONS 671J LONG BEACH 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.