NumberResearch Membership · Data 09/30/2026

Recent prefix assignments

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

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
Rogers Communications Canada Inc. (Wireless) 46
8X8, INC. 43
NEW CINGULAR WIRELESS PCS, LLC - DC 28
NEW CINGULAR WIRELESS PCS, LLC - IL 23
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
2017-09-29 539-666 0–9 XXXwhole prefix which blocks → ONVOY, LLC - OK 409F TULSA OK
2017-09-29 563-666 3XXX4XXX5XXX6XXX7XXX8XXX9XXX · 3 holders which blocks → ONVOY, LLC - IA 221F WALCOTT IA
2017-09-29 571-495 0–9 XXXall 10 · 5 holders which blocks → LEVEL 3 COMMUNICATIONS, LLC - VA 8825 WSNGTNZN19 VA
2017-09-29 574-800 0–9 XXXall 10 · 3 holders which blocks → ONVOY, LLC - IN 097D SOUTH BEND IN
2017-09-29 681-484 0–9 XXXall 10 · 7 holders which blocks → LEVEL 3 COMMUNICATIONS, LLC - WV 9944 LEWISBURG WV
2017-09-29 682-666 0–9 XXXall 10 · 4 holders which blocks → ONVOY, LLC - TX 903C ARLINGTON TX
2017-09-29 720-765 0–9 XXXwhole prefix which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CO 6567 DENVER CO
2017-09-29 769-666 0–9 XXXall 10 · 2 holders which blocks → ONVOY, LLC - MS 719E MADISON MS
2017-09-29 931-666 0XXX1XXX4XXX6XXX7XXX8XXX · 5 holders which blocks → ONVOY, LLC - TN 525E CUMBERLDCY TN
2017-09-28 205-600 0–9 XXXwhole prefix which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - AL 6804 BIRMINGHAM AL
2017-09-28 249-353 not yet reported which blocks → TELUS Mobility 8303 Peterborough —
2017-09-28 424-401 0–9 XXXall 10 · 6 holders which blocks → COMCAST PHONE OF CALIFORNIA, LLC 394L LOMITA CA
2017-09-28 438-940 not yet reported which blocks → TELUS Quebec 2243 Montreal —
2017-09-28 470-384 0–9 XXXall 10 · 2 holders which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - GA 6540 ATLANTA NW GA
2017-09-28 475-800 0–9 XXXall 10 · 2 holders which blocks → ONVOY, LLC - CT 639C NEW HAVEN CT
2017-09-28 501-500 0–9 XXXall 10 · 3 holders which blocks → ONVOY, LLC - AR 348F LITTLEROCK AR
2017-09-28 548-996 not yet reported which blocks → TELUS Mobility 8303 Chatham —
2017-09-28 548-997 not yet reported which blocks → TELUS Mobility 8303 Sarnia —
2017-09-28 551-212 0–9 XXXall 10 · 4 holders which blocks → CABLEVISION LIGHTPATH, INC. - NJ 4948 TEANECK NJ
2017-09-28 571-666 0–9 XXXall 10 · 6 holders which blocks → ONVOY, LLC - VA 138E WSNGTNZN17 VA
2017-09-28 581-553 not yet reported which blocks → TELUS Quebec 8083 Sainte-Marie-de-Beauce —
2017-09-28 581-993 not yet reported which blocks → TELUS Mobility 8303 Quebec —
2017-09-28 608-400 0–9 XXXall 10 · 3 holders which blocks → ONVOY, LLC - WI 225C MADISON WI
2017-09-28 608-708 1XXX2XXX3XXX4XXX5XXX6XXX7XXX8XXX · 4 holders which blocks → LEVEL 3 COMMUNICATIONS, LLC - WI 5489 DEERFIELD WI
2017-09-28 608-912 0–9 XXXall 10 · 7 holders which blocks → BANDWIDTH.COM CLEC, LLC - WI 007F DE FOREST WI
2017-09-28 762-800 0–9 XXXall 10 · 2 holders which blocks → ONVOY, LLC - GA 067D AUGUSTA GA
2017-09-28 782-232 not yet reported which blocks → TELUS Mobility 8303 Kentville —
2017-09-28 828-690 0XXX1XXX2XXX3XXX6XXX8XXX · 4 holders which blocks → BANDWIDTH.COM CLEC, LLC - NC 998E ANDREWS NC
2017-09-28 828-800 0–9 XXXall 10 · 2 holders which blocks → ONVOY, LLC - NC 638E NEWTON NC
2017-09-28 878-439 0–9 XXXall 10 · 8 holders which blocks → MCIMETRO ACCESS TRANSMISSION SERVICES LLC 7229 ROCHESTER PA
2017-09-28 907-483 0XXX1XXX3XXX7XXX which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS 6563 NORTH POLE AK
2017-09-28 929-419 0–9 XXXall 10 · 4 holders which blocks → ONVOY, LLC- NY 384C NWYRCYZN06 NY
2017-09-28 985-268 0–9 XXXall 10 · 4 holders which blocks → BANDWIDTH.COM CLEC, LLC - LA 153F PINE LA
2017-09-27 361-666 0–9 XXXall 10 · 4 holders which blocks → ONVOY, LLC - TX 903C ALICE TX
2017-09-27 401-800 0XXX1XXX3XXX4XXX6XXX8XXX9XXX · 4 holders which blocks → ONVOY, LLC - RI 977E BLOCK IS RI
2017-09-27 414-666 0–9 XXXall 10 · 2 holders which blocks → ONVOY, LLC - WI 225C MILWAUKZN1 WI
2017-09-27 414-998 0–9 XXXall 10 · 2 holders which blocks → VONAGE AMERICA LLC 197D MILWAUKZN1 WI
2017-09-27 430-236 0–9 XXXall 10 · 5 holders which blocks → NEW CINGULAR WIRELESS PCS, LLC - IL 6534 CORSICANA TX
2017-09-27 629-900 0–9 XXXall 10 · 3 holders which blocks → ONVOY, LLC - TN 525E NASHVILLE TN
2017-09-27 646-877 0–9 XXXall 10 · 2 holders which blocks → BANDWIDTH.COM CLEC, LLC - NY 997E NWYRCYZN01 NY
2017-09-27 662-888 0–9 XXXall 10 · 4 holders which blocks → ONVOY, LLC - MS 719E COLUMBSAFB MS
2017-09-27 680-800 0–9 XXXall 10 · 5 holders which blocks → ONVOY, LLC- NY 384C SYRACUSE NY
2017-09-27 731-666 0–9 XXXall 10 · 8 holders which blocks → ONVOY, LLC - TN 525E CAMDEN TN
2017-09-27 731-800 0XXX1XXX4XXX5XXX6XXX7XXX8XXX9XXX · 5 holders which blocks → ONVOY, LLC - TN 525E LEXINGTON TN
2017-09-27 862-310 0–9 XXXall 10 · 3 holders which blocks → NEW CINGULAR WIRELESS PCS, LLC - DC 4036 PATERSON NJ
2017-09-27 909-449 0–9 XXXall 10 · 3 holders which blocks → NEW CINGULAR WIRELESS PCS, LLC 6010 MARSHALL CA
2017-09-26 214-482 0–9 XXXwhole prefix which blocks → METROPCS, INC. 5562 GRANDPRARI TX
2017-09-26 262-666 0–9 XXXall 10 · 6 holders which blocks → ONVOY, LLC - WI 225C WAUKESHA WI
2017-09-26 332-202 0–9 XXXwhole prefix which blocks → METROPCS, INC. 5562 NWYRCYZN01 NY
2017-09-26 337-345 0–9 XXXall 10 · 5 holders which blocks → ONVOY, LLC - LA 749E LAFAYETTE LA

Source: NANPA CO Code Assignments (Utilized, All States, Public), file date 09/30/2026 — Tier A primary source, refreshed on every import. Viewing is free; bulk downloads require a membership.