NumberResearch Membership · Data 09/26/2026

Recent prefix assignments

360 prefixes assigned in the last 30 days · from the daily NANPA CO code file, 09/26/2026

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 28
ONVOY, LLC - CA 26
NEW CINGULAR WIRELESS PCS, LLC - IL 26
Rogers Communications Canada Inc. (Wireless) 23
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
— 667-309 0–9 XXXall 10 · 3 holders which blocks → ONVOY, LLC - MD 876D BALTIMORE MD
— 667-311 not yet reported which blocks → MULTIPLE OCN LISTING MULT XXXXXXXXXX MD
— 667-314 0–9 XXXall 10 · 8 holders which blocks → BARR TELL USA, INC. 964H WESTMINSTR MD
— 667-344 0–9 XXXall 10 · 4 holders which blocks → TELNYX LLC 073H CHASE MD
— 667-389 0–9 XXXall 10 · 5 holders which blocks → COMMIO, LLC 939H CAMBRIDGE MD
— 667-411 not yet reported which blocks → MULTIPLE OCN LISTING MULT XXXXXXXXXX MD
— 667-421 0–9 XXXall 10 · 5 holders which blocks → TELNYX LLC 073H COLUMBIA MD
— 667-511 not yet reported which blocks → MULTIPLE OCN LISTING MULT XXXXXXXXXX MD
— 667-542 not yet reported which blocks → OMNIPOINT COMMUNICATIONS CAP OPERATIONS, LLC 6855 ABERDEEN MD
— 667-555 not yet reported which blocks → MULTIPLE OCN LISTING MULT DIR ASST MD
— 667-611 not yet reported which blocks → MULTIPLE OCN LISTING MULT XXXXXXXXXX MD
— 667-666 0–9 XXXall 10 · 5 holders which blocks → ONVOY, LLC - MD 876D WEST RIVER MD
— 667-700 not yet reported which blocks → MD
— 667-711 not yet reported which blocks → MULTIPLE OCN LISTING MULT XXXXXXXXXX MD
— 667-811 not yet reported which blocks → MULTIPLE OCN LISTING MULT XXXXXXXXXX MD
— 667-888 0–9 XXXwhole prefix which blocks → ONVOY, LLC - MD 876D BALTIMORE MD
— 667-911 not yet reported which blocks → MULTIPLE OCN LISTING MULT XXXXXXXXXX MD
— 667-950 not yet reported which blocks → MD
— 667-958 not yet reported which blocks → MD
— 667-959 not yet reported which blocks → MD
— 667-976 not yet reported which blocks → MD
— 669-200 0–9 XXXall 10 · 5 holders which blocks → ONVOY, LLC - CA 649C SNJS SOUTH CA
— 669-211 not yet reported which blocks → MULTIPLE OCN LISTING MULT XXXXXXXXXX CA
— 669-222 0–9 XXXall 10 · 6 holders which blocks → ONVOY, LLC - CA 649C CAMPBELL CA
— 669-271 0–9 XXXall 10 · 6 holders which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CA 6006 LOS GATOS CA
— 669-300 0–9 XXXall 10 · 5 holders which blocks → ONVOY, LLC - CA 649C CAMPBELL CA
— 669-311 not yet reported which blocks → MULTIPLE OCN LISTING MULT XXXXXXXXXX CA
— 669-333 0–9 XXXall 10 · 5 holders which blocks → ONVOY, LLC - CA 649C SNJS SOUTH CA
— 669-400 0–9 XXXall 10 · 6 holders which blocks → ONVOY, LLC - CA 649C SNJS SOUTH CA
— 669-408 not yet reported which blocks → CA
— 669-411 not yet reported which blocks → MULTIPLE OCN LISTING MULT XXXXXXXXXX CA
— 669-444 0–9 XXXall 10 · 3 holders which blocks → ONVOY, LLC - CA 649C SNJS WEST CA
— 669-500 0–9 XXXall 10 · 6 holders which blocks → ONVOY, LLC - CA 649C GILROY CA
— 669-511 not yet reported which blocks → MULTIPLE OCN LISTING MULT XXXXXXXXXX CA
— 669-555 not yet reported which blocks → MULTIPLE OCN LISTING MULT DIR ASST CA
— 669-600 0–9 XXXall 10 · 7 holders which blocks → ONVOY, LLC - CA 649C SUNNYVALE CA
— 669-611 not yet reported which blocks → MULTIPLE OCN LISTING MULT XXXXXXXXXX CA
— 669-666 0–9 XXXall 10 · 7 holders which blocks → ONVOY, LLC - CA 649C SNJS WEST CA
— 669-700 not yet reported which blocks → CA
— 669-711 not yet reported which blocks → MULTIPLE OCN LISTING MULT XXXXXXXXXX CA
— 669-777 0–9 XXXall 10 · 6 holders which blocks → ONVOY, LLC - CA 649C SUNNYVALE CA
— 669-800 0–9 XXXall 10 · 5 holders which blocks → ONVOY, LLC - CA 649C SNJS WEST CA
— 669-811 not yet reported which blocks → MULTIPLE OCN LISTING MULT XXXXXXXXXX CA
— 669-888 0–9 XXXall 10 · 6 holders which blocks → ONVOY, LLC - CA 649C MORGANHILL CA
— 669-900 0–9 XXXall 10 · 4 holders which blocks → ONVOY, LLC - CA 649C SNJS NORTH CA
— 669-911 not yet reported which blocks → MULTIPLE OCN LISTING MULT XXXXXXXXXX CA
— 669-950 not yet reported which blocks → CA
— 669-958 not yet reported which blocks → MULTIPLE OCN LISTING MULT XXXXXXXXXX CA
— 669-959 not yet reported which blocks → MULTIPLE OCN LISTING MULT XXXXXXXXXX CA
— 669-976 not yet reported which blocks → MULTIPLE OCN LISTING MULT XXXXXXXXXX CA

Source: NANPA CO Code Assignments (Utilized, All States, Public), file date 09/26/2026 — Tier A primary source, refreshed on every import. Viewing is free; bulk downloads require a membership.