NumberResearch Membership · Data 09/27/2026

Recent prefix assignments

334 prefixes assigned in the last 30 days · from the daily NANPA CO code file, 09/27/2026

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

The Code holder is who opened each NPA-NXX prefix — not necessarily who holds the numbers. A prefix is 10,000 numbers, but under pooling its ten 1,000-number blocks are handed out individually, often to different carriers; the code holder may hold only one block, or none. The Thousands-blocks column shows how the ten blocks are really split — click which blocks → to see who holds each 1,000-number block and its last-4-digit range. Assignments are initial assignments; the current serving carrier may differ due to portability.

Most active assignees, last 30 days
8X8, INC. 43
NEW CINGULAR WIRELESS PCS, LLC - DC 26
Rogers Communications Canada Inc. (Wireless) 23
NEW CINGULAR WIRELESS PCS, LLC - IL 22
ONVOY, LLC - CA 19
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-NXXThousands-blocks taken (last-4 opening)Code holderOCNRate centerState
— 340-771 not yet reported which blocks → VITELCOM CELLULAR, INC. 346D CHTAMSTTHS VI
— 340-772 not yet reported which blocks → VIRGIN ISLANDS TEL. CORP. DBA INNOVATIVE TELEPHONE 3300 FRKSTDSTCR VI
— 340-773 not yet reported which blocks → VIRGIN ISLANDS TEL. CORP. DBA INNOVATIVE TELEPHONE 3300 CHNSTDSTCR VI
— 340-774 not yet reported which blocks → VIRGIN ISLANDS TEL. CORP. DBA INNOVATIVE TELEPHONE 3300 CHTAMSTTHS VI
— 340-775 not yet reported which blocks → VIRGIN ISLANDS TEL. CORP. DBA INNOVATIVE TELEPHONE 3300 CHTAMSTTHS VI
— 340-776 not yet reported which blocks → VIRGIN ISLANDS TEL. CORP. DBA INNOVATIVE TELEPHONE 3300 CHTAMSTTHS VI
— 340-777 not yet reported which blocks → VIRGIN ISLANDS TEL. CORP. DBA INNOVATIVE TELEPHONE 3300 CHTAMSTTHS VI
— 340-778 not yet reported which blocks → VIRGIN ISLANDS TEL. CORP. DBA INNOVATIVE TELEPHONE 3300 CHTAMSTTHS VI
— 340-779 not yet reported which blocks → VIRGIN ISLANDS TEL. CORP. DBA INNOVATIVE TELEPHONE 3300 CHTAMSTTHS VI
— 340-800 not yet reported which blocks → VI
— 340-811 not yet reported which blocks → MULTIPLE OCN LISTING MULT XXXXXXXXXX VI
— 340-884 not yet reported which blocks → WINDKEEPER COMMUNICATIONS, INC. 6915 CHTAMSTTHS VI
— 340-888 not yet reported which blocks → VI
— 340-900 not yet reported which blocks → VI
— 340-911 not yet reported which blocks → MULTIPLE OCN LISTING MULT XXXXXXXXXX VI
— 340-913 not yet reported which blocks → VI
— 340-917 not yet reported which blocks → VI
— 340-950 not yet reported which blocks → VI
— 340-958 not yet reported which blocks → VI
— 340-959 not yet reported which blocks → VI
— 340-976 not yet reported which blocks → VI
— 340-988 not yet reported which blocks → VI
— 341-211 not yet reported which blocks → MULTIPLE OCN LISTING MULT CA
— 341-311 not yet reported which blocks → MULTIPLE OCN LISTING MULT CA
— 341-411 not yet reported which blocks → MULTIPLE OCN LISTING MULT CA
— 341-510 not yet reported which blocks → CA
— 341-511 not yet reported which blocks → MULTIPLE OCN LISTING MULT CA
— 341-555 not yet reported which blocks → MULTIPLE OCN LISTING MULT DIR ASST CA
— 341-611 not yet reported which blocks → MULTIPLE OCN LISTING MULT CA
— 341-700 not yet reported which blocks → CA
— 341-711 not yet reported which blocks → MULTIPLE OCN LISTING MULT CA
— 341-811 not yet reported which blocks → MULTIPLE OCN LISTING MULT CA
— 341-895 0–9 XXXall 10 · 5 holders which blocks → ONVOY, LLC - CA 649C OKLD ALMD CA
— 341-911 not yet reported which blocks → MULTIPLE OCN LISTING MULT CA
— 341-950 not yet reported which blocks → CA
— 341-958 not yet reported which blocks → CA
— 341-959 not yet reported which blocks → CA
— 341-976 not yet reported which blocks → CA
— 346-211 not yet reported which blocks → MULTIPLE OCN LISTING MULT XXXXXXXXXX TX
— 346-212 0–9 XXXall 10 · 3 holders which blocks → AERIAL COMMUNICATIONS, INC. 6701 HOUSTON TX
— 346-237 0–9 XXXall 10 · 4 holders which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - TX 6506 HOUSTON TX
— 346-267 0–9 XXXall 10 · 2 holders which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - TX 6506 HOUSTON TX
— 346-311 not yet reported which blocks → MULTIPLE OCN LISTING MULT XXXXXXXXXX TX
— 346-344 0–9 XXXall 10 · 2 holders which blocks → ONVOY, LLC - TX 903C CROSBY TX
— 346-347 0–9 XXXall 10 · 5 holders which blocks → TELNYX LLC 073H ALVIN TX
— 346-354 0–9 XXXall 10 · 6 holders which blocks → PEERLESS NETWORK OF TEXAS, LLC - TX 177F HOUSTON TX
— 346-383 0–9 XXXwhole prefix which blocks → AERIAL COMMUNICATIONS, INC. 6701 HOUSTON TX
— 346-403 0–9 XXXall 10 · 3 holders which blocks → PEERLESS NETWORK OF TEXAS, LLC - TX 177F HOUSTON TX
— 346-405 0–9 XXXall 10 · 3 holders which blocks → TELEPORT COMMUNICATIONS AMERICA, LLC - TX 7138 HOUSTON TX
— 346-411 not yet reported which blocks → MULTIPLE OCN LISTING MULT XXXXXXXXXX TX

Source: NANPA CO Code Assignments (Utilized, All States, Public), file date 09/27/2026 — Tier A primary source, refreshed on every import. Viewing is free; bulk downloads require a membership.