NumberResearch Membership · Data 09/24/2026

Recent prefix assignments

349 prefixes assigned in the last 30 days · from the daily NANPA CO code file, 09/24/2026

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 31
ONVOY, LLC - CA 27
NEW CINGULAR WIRELESS PCS, LLC - IL 27
ONVOY, LLC - NJ 15
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
2012-10-16 541-631 0–9 XXXall 10 · 5 holders which blocks → BANDWIDTH.COM CLEC, LLC - OR 076F ASHLAND OR
2012-10-16 843-620 0–9 XXXall 10 · 3 holders which blocks → BANDWIDTH.COM CLEC, LLC - SC 077F HOLLYWOOD SC
2012-10-16 916-587 0–9 XXXall 10 · 5 holders which blocks → ONVOY, LLC - CA 649C LINCOLN CA
2012-10-15 224-315 0–9 XXXall 10 · 3 holders which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - IL 6333 DESPLAINES IL
2012-10-15 234-302 0–9 XXXwhole prefix which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - OH 6025 MARLBORO OH
2012-10-15 234-305 0–9 XXXwhole prefix which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - OH 6025 CORTLAND OH
2012-10-15 234-314 0–9 XXXwhole prefix which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - OH 6025 MANCHESTR OH
2012-10-15 234-316 0–9 XXXwhole prefix which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - OH 6025 GREENSBURG OH
2012-10-15 320-401 0XXX1XXX2XXX4XXX · 4 holders which blocks → CHARTER IP ENABLED SERVICES, LLC 792K MAPLE LAKE MN
2012-10-15 440-410 0–9 XXXwhole prefix which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - OH 6025 BRECKSVL OH
2012-10-15 579-881 not yet reported which blocks → Fibernetics Corporation 464D Longueuil —
2012-10-15 579-884 not yet reported which blocks → Fibernetics Corporation 464D St-Bruno —
2012-10-15 604-679 not yet reported which blocks → Bell Mobility 6574 Vancouver —
2012-10-15 606-396 0–9 XXXall 10 · 6 holders which blocks → WINDSTREAM KENTUCKY EAST, INC. - LEXINGTON 9690 MONTICELLO KY
2012-10-15 614-667 0–9 XXXwhole prefix which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - OH 6025 GAHANNA OH
2012-10-15 681-209 0–9 XXXall 10 · 2 holders which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - WV 6394 MORGANTOWN WV
2012-10-15 706-470 not yet reported which blocks → TRUVISTA COMMUNICATIONS OF GEORGIA, LLC - GA 847G EASTANOLLE GA
2012-10-15 706-960 0–9 XXXall 10 · 6 holders which blocks → TRUVISTA COMMUNICATIONS OF GEORGIA, LLC - GA 847G CLAYTON GA
2012-10-15 805-623 0–9 XXXall 10 · 7 holders which blocks → LEVEL 3 COMMUNICATIONS, LLC - CA 8826 SANTAMARIA CA
2012-10-15 873-888 not yet reported which blocks → Fibernetics Corporation 464D Sherbrooke —
2012-10-15 873-889 not yet reported which blocks → Fibernetics Corporation 464D Lac-Megantic —
2012-10-15 919-307 0–9 XXXall 10 · 4 holders which blocks → FRONTIER COMMUNICATIONS OF AMERICA, INC. - NC 440G RALEIGH NC
2012-10-12 206-735 0–9 XXXall 10 · 3 holders which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - WA 5812 SEATTLE WA
2012-10-12 412-529 0–9 XXXall 10 · 2 holders which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - PA 6392 PTTSBGZON1 PA
2012-10-12 412-738 0–9 XXXwhole prefix which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - PA 6392 PTTSBGZON1 PA
2012-10-12 571-982 0–9 XXXall 10 · 5 holders which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - VA 6827 WSNGTNZN08 VA
2012-10-12 579-880 not yet reported which blocks → Fibernetics Corporation 464D St-Lambert —
2012-10-12 579-882 not yet reported which blocks → Fibernetics Corporation 464D Boucherville —
2012-10-12 579-883 not yet reported which blocks → Fibernetics Corporation 464D Beloeil —
2012-10-12 579-885 not yet reported which blocks → Fibernetics Corporation 464D Chambly —
2012-10-12 579-886 not yet reported which blocks → Fibernetics Corporation 464D Laprairie —
2012-10-12 608-709 0–9 XXXall 10 · 6 holders which blocks → LEVEL 3 TELECOM OF WISCONSIN, LP - WI 7322 MADISON WI
2012-10-11 289-834 not yet reported which blocks → Bell Mobility 6574 Oakville —
2012-10-11 301-612 0–9 XXXall 10 · 2 holders which blocks → TELEPORT COMMUNICATIONS AMERICA, LLC - MD 7325 WSNG238Z14 MD
2012-10-11 469-404 0–9 XXXwhole prefix which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - TX 6506 GRANDPRARI TX
2012-10-11 562-473 0–9 XXXall 10 · 5 holders which blocks → MCIMETRO ACCESS TRANSMISSION SERVICES LLC 7229 LONG BEACH CA
2012-10-11 646-612 0–9 XXXall 10 · 3 holders which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - NY 6959 NWYRCYZN01 NY
2012-10-11 646-656 0–9 XXXwhole prefix which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - NY 6959 NWYRCYZN01 NY
2012-10-11 647-529 not yet reported which blocks → Bell Mobility 6574 Toronto —
2012-10-11 902-774 not yet reported which blocks → Bell Mobility Aliant 329A Yarmouth —
2012-10-11 917-634 0–9 XXXall 10 · 5 holders which blocks → MCIMETRO ACCESS TRANSMISSION SERVICES LLC - NY 7133 NWYRCYZN04 NY
2012-10-11 917-935 0–9 XXXall 10 · 5 holders which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - NY 6959 NWYRCYZN08 NY
2012-10-11 917-993 0–9 XXXall 10 · 2 holders which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - NY 6959 NWYRCYZN04 NY
2012-10-11 918-980 not yet reported which blocks → CROSS WIRELESS, L.L.C. 148G HARTSHORNE OK
2012-10-10 214-984 0–9 XXXall 10 · 3 holders which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - TX 6506 GRANDPRARI TX
2012-10-10 219-307 0–9 XXXall 10 · 5 holders which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - IN 6725 VALPARAISO IN
2012-10-10 512-720 0–9 XXXall 10 · 3 holders which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - TX 6506 AUSTIN TX
2012-10-10 612-666 0–9 XXXall 10 · 3 holders which blocks → ONVOY, LLC - MN 184D TWINCITIES MN
2012-10-10 803-504 0–9 XXXall 10 · 3 holders which blocks → SUNCOM DBA T-MOBILE USA 8645 ROCK HILL SC
2012-10-10 817-818 0–9 XXXall 10 · 3 holders which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - TX 6506 WEATHERFD TX

Source: NANPA CO Code Assignments (Utilized, All States, Public), file date 09/24/2026 — Tier A primary source, refreshed on every import. Viewing is free; bulk downloads require a membership.