NumberResearch Membership · Data 09/25/2026

Recent prefix assignments

358 prefixes assigned in the last 30 days · from the daily NANPA CO code file, 09/25/2026

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
2022-01-07 332-257 0–9 XXXwhole prefix which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - NY 6959 NWYRCYZN01 NY
2022-01-07 343-676 not yet reported which blocks → Fibernetics Corporation 464D Long Sault —
2022-01-07 343-678 not yet reported which blocks → Fibernetics Corporation 464D Martintown —
2022-01-07 343-679 not yet reported which blocks → Fibernetics Corporation 464D Maxville —
2022-01-07 343-680 not yet reported which blocks → Fibernetics Corporation 464D Morrisburg —
2022-01-07 346-837 0–9 XXXall 10 · 2 holders which blocks → TON80 COMMUNICATIONS, LLC 516J BAMMEL TX
2022-01-07 351-688 8XXX which blocks → TON80 COMMUNICATIONS, LLC 516J GEORGETOWN MA
2022-01-07 352-741 0–9 XXXall 10 · 6 holders which blocks → BOOST SUBSCRIBERCO L.L.C. 490J BROOKSVL FL
2022-01-07 380-837 0XXX1XXX4XXX · 3 holders which blocks → TON80 COMMUNICATIONS, LLC 516J GROVEPORT OH
2022-01-07 414-742 0–9 XXXall 10 · 5 holders which blocks → TON80 COMMUNICATIONS, LLC 516J MILWAUKZN4 WI
2022-01-07 424-471 0–9 XXXall 10 · 5 holders which blocks → T-MOBILE USA, INC. 6529 REDONDO CA
2022-01-07 424-728 0–9 XXXall 10 · 5 holders which blocks → TON80 COMMUNICATIONS, LLC 516J CMTN GRDN CA
2022-01-07 430-837 0XXX4XXX8XXX9XXX · 3 holders which blocks → TON80 COMMUNICATIONS, LLC 516J BELLSSAVOY TX
2022-01-07 440-798 0XXX1XXX2XXX3XXX4XXX6XXX8XXX9XXX · 4 holders which blocks → BOOST SUBSCRIBERCO L.L.C. 490J AMHERST OH
2022-01-07 442-375 0–9 XXXall 10 · 4 holders which blocks → T-MOBILE USA, INC. 6529 OCSD OCSD CA
2022-01-07 442-532 0–9 XXXall 10 · 5 holders which blocks → TON80 COMMUNICATIONS, LLC 516J EL CENTRO CA
2022-01-07 463-337 0XXX1XXX2XXX4XXX7XXX8XXX9XXX · 5 holders which blocks → TON80 COMMUNICATIONS, LLC 516J NEWPALSTIN IN
2022-01-07 470-935 0–9 XXXall 10 · 4 holders which blocks → TELEPORT COMMUNICATIONS AMERICA, LLC - GA 8392 GRIFFIN GA
2022-01-07 475-342 0–9 XXXall 10 · 4 holders which blocks → TON80 COMMUNICATIONS, LLC 516J ANSONIDRBY CT
2022-01-07 475-746 0–9 XXXall 10 · 6 holders which blocks → TON80 COMMUNICATIONS, LLC 516J STAMFORD CT
2022-01-07 517-893 0XXX2XXX3XXX4XXX5XXX6XXX7XXX8XXX9XXX · 3 holders which blocks → TWILIO INTERNATIONAL, INC. 506J LANSING MI
2022-01-07 520-613 0XXX1XXX2XXX3XXX5XXX6XXX7XXX8XXX9XXX · 3 holders which blocks → NEW CINGULAR WIRELESS PCS, LLC 6010 TUCSON AZ
2022-01-07 534-227 0XXX1XXX2XXX3XXX4XXX6XXX7XXX8XXX · 5 holders which blocks → TON80 COMMUNICATIONS, LLC 516J COLBY WI
2022-01-07 562-783 0–9 XXXall 10 · 5 holders which blocks → TON80 COMMUNICATIONS, LLC 516J WHITTIER CA
2022-01-07 564-219 0–9 XXXall 10 · 3 holders which blocks → T-MOBILE USA, INC. 6529 VANCOUVER WA
2022-01-07 582-208 0–9 XXXall 10 · 2 holders which blocks → NEW CINGULAR WIRELESS PCS, LLC - IL 6534 REYNOLDSVL PA
2022-01-07 612-477 0–9 XXXall 10 · 2 holders which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MN 5816 TWINCITIES MN
2022-01-07 626-635 0–9 XXXall 10 · 4 holders which blocks → T-MOBILE USA, INC. 6529 AZUSA CA
2022-01-07 628-283 0–9 XXXall 10 · 5 holders which blocks → T-MOBILE USA, INC. 6529 SNFC MT-EV CA
2022-01-07 629-272 0XXX1XXX3XXX6XXX8XXX9XXX · 5 holders which blocks → BANDWIDTH.COM CLEC, LLC - TN 124F VANLEER TN
2022-01-07 650-671 0–9 XXXall 10 · 4 holders which blocks → T-MOBILE USA, INC. 6529 SSNFRNCSCO CA
2022-01-07 657-536 0–9 XXXwhole prefix which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CA 6006 ANAHEIM CA
2022-01-07 657-542 0–9 XXXwhole prefix which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CA 6006 HUNTITNBCH CA
2022-01-07 657-545 0–9 XXXwhole prefix which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CA 6006 SANTA ANA CA
2022-01-07 657-548 0–9 XXXwhole prefix which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CA 6006 WESTMINSTR CA
2022-01-07 662-926 0XXX1XXX2XXX3XXX4XXX5XXX6XXX7XXX9XXX · 4 holders which blocks → TON80 COMMUNICATIONS, LLC 516J CLEVELAND MS
2022-01-07 680-238 0XXX1XXX3XXX6XXX8XXX9XXX · 5 holders which blocks → PAETEC ITEL, LLC 829J MORAVIA NY
2022-01-07 682-538 0XXX1XXX4XXX5XXX7XXX8XXX · 3 holders which blocks → TON80 COMMUNICATIONS, LLC 516J KELLER TX
2022-01-07 727-506 0–9 XXXwhole prefix which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - FL 6502 CLEARWATER FL
2022-01-07 743-626 0–9 XXXall 10 · 2 holders which blocks → TON80 COMMUNICATIONS, LLC 516J LEXINGTON NC
2022-01-07 743-727 0XXX1XXX2XXX3XXX4XXX5XXX7XXX · 5 holders which blocks → TON80 COMMUNICATIONS, LLC 516J BOONVILLE NC
2022-01-07 747-321 0–9 XXXall 10 · 2 holders which blocks → T-MOBILE USA, INC. 6529 SNFN PACM CA
2022-01-07 747-367 0–9 XXXall 10 · 3 holders which blocks → TON80 COMMUNICATIONS, LLC 516J BRBN BRBN CA
2022-01-07 765-837 0XXX1XXX4XXX8XXX · 3 holders which blocks → TON80 COMMUNICATIONS, LLC 516J DELPHI IN
2022-01-07 765-926 0XXX1XXX3XXX4XXX5XXX6XXX7XXX8XXX9XXX · 6 holders which blocks → TON80 COMMUNICATIONS, LLC 516J KOKOMO IN
2022-01-07 779-837 0XXX1XXX2XXX3XXX4XXX5XXX · 6 holders which blocks → TON80 COMMUNICATIONS, LLC 516J ELWOOD IL
2022-01-07 839-213 0–9 XXXall 10 · 5 holders which blocks → PAETEC ITEL, LLC 829J COLUMBIA SC
2022-01-07 854-768 0XXX1XXX3XXX6XXX7XXX8XXX · 6 holders which blocks → TON80 COMMUNICATIONS, LLC 516J EDISTO IS SC
2022-01-07 857-767 0–9 XXXall 10 · 3 holders which blocks → TON80 COMMUNICATIONS, LLC 516J BOSTON MA
2022-01-07 862-783 0–9 XXXall 10 · 4 holders which blocks → TON80 COMMUNICATIONS, LLC 516J MORRISTOWN NJ

Source: NANPA CO Code Assignments (Utilized, All States, Public), file date 09/25/2026 — Tier A primary source, refreshed on every import. Viewing is free; bulk downloads require a membership.