NumberResearch Membership · Data 09/27/2026

Recent prefix assignments

341 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 21
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
2022-02-10 431-416 not yet reported which blocks → LES.NET (1996) Inc. 141F Ste. Anne —
2022-02-10 434-437 0–9 XXXall 10 · 3 holders which blocks → TWILIO INTERNATIONAL, INC. 506J CHARLOTSVL VA
2022-02-10 530-716 0–9 XXXall 10 · 5 holders which blocks → T-MOBILE USA, INC. 6529 OROVILLE CA
2022-02-10 563-446 4XXX6XXX · 2 holders which blocks → TON80 COMMUNICATIONS, LLC 516J DELHI IA
2022-02-10 563-746 7XXX which blocks → TON80 COMMUNICATIONS, LLC 516J GREELEY IA
2022-02-10 657-560 0–9 XXXwhole prefix which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CA 6006 ANAHEIM CA
2022-02-10 657-568 0–9 XXXwhole prefix which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CA 6006 HUNTITNBCH CA
2022-02-10 657-569 0–9 XXXwhole prefix which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CA 6006 HUNTITNBCH CA
2022-02-10 667-393 0XXX2XXX3XXX8XXX · 3 holders which blocks → BANDWIDTH.COM CLEC, LLC - MD 071F MILLERSVL MD
2022-02-10 682-378 0–9 XXXall 10 · 3 holders which blocks → NEW CINGULAR WIRELESS PCS, LLC - IL 6534 CLEBURNE TX
2022-02-10 719-736 8XXX which blocks → TON80 COMMUNICATIONS, LLC 516J HARTSEL CO
2022-02-10 742-882 not yet reported which blocks → Rogers Communications Canada Inc. (Cable) 743B Niagara Falls —
2022-02-10 747-318 0–9 XXXall 10 · 3 holders which blocks → MCIMETRO ACCESS TRANSMISSION SERVICES LLC 7229 CANOGAPARK CA
2022-02-10 828-763 0XXX6XXX8XXX · 3 holders which blocks → TON80 COMMUNICATIONS, LLC 516J BLOWING RK NC
2022-02-10 839-266 0XXX1XXX2XXX3XXX4XXX5XXX6XXX8XXX9XXX · 6 holders which blocks → TON80 COMMUNICATIONS, LLC 516J MANNING SC
2022-02-10 848-372 0–9 XXXall 10 · 4 holders which blocks → TON80 COMMUNICATIONS, LLC 516J METUCHEN NJ
2022-02-10 862-683 0–9 XXXall 10 · 6 holders which blocks → TON80 COMMUNICATIONS, LLC 516J SUCCASUNNA NJ
2022-02-10 928-664 2XXX4XXX · 2 holders which blocks → TON80 COMMUNICATIONS, LLC 516J CIBOLA AZ
2022-02-10 928-746 7XXX which blocks → TON80 COMMUNICATIONS, LLC 516J HARQUHLVLY AZ
2022-02-10 928-786 6XXX which blocks → TON80 COMMUNICATIONS, LLC 516J HYDER AZ
2022-02-10 928-843 0–9 XXXall 10 · 3 holders which blocks → TON80 COMMUNICATIONS, LLC 516J SOMERTON AZ
2022-02-10 928-886 0XXX6XXX8XXX · 3 holders which blocks → TON80 COMMUNICATIONS, LLC 516J ST JOHNS AZ
2022-02-10 986-366 4XXX6XXX · 2 holders which blocks → TON80 COMMUNICATIONS, LLC 516J NORLAND ID
2022-02-09 223-366 0XXX1XXX3XXX4XXX5XXX8XXX9XXX · 4 holders which blocks → TON80 COMMUNICATIONS, LLC 516J STRASBURG PA
2022-02-09 254-885 0XXX1XXX3XXX5XXX7XXX8XXX9XXX · 3 holders which blocks → TON80 COMMUNICATIONS, LLC 516J ITASCA TX
2022-02-09 272-776 2XXX3XXX6XXX7XXX · 4 holders which blocks → TON80 COMMUNICATIONS, LLC 516J NUANGOLA PA
2022-02-09 339-463 0–9 XXXall 10 · 3 holders which blocks → TON80 COMMUNICATIONS, LLC 516J BRAINTREE MA
2022-02-09 339-746 0–9 XXXall 10 · 4 holders which blocks → TON80 COMMUNICATIONS, LLC 516J WEYMOUTH MA
2022-02-09 346-743 0–9 XXXall 10 · 4 holders which blocks → TON80 COMMUNICATIONS, LLC 516J BARKER TX
2022-02-09 364-262 2XXX3XXX · 2 holders which blocks → TON80 COMMUNICATIONS, LLC 516J FAIRPLAY KY
2022-02-09 364-526 3XXX4XXX5XXX · 2 holders which blocks → TON80 COMMUNICATIONS, LLC 516J CLARKSON KY
2022-02-09 364-728 0–9 XXXall 10 · 3 holders which blocks → TON80 COMMUNICATIONS, LLC 516J CAMPBELSVL KY
2022-02-09 364-768 0XXX6XXX7XXX · 3 holders which blocks → TON80 COMMUNICATIONS, LLC 516J BURKESVL KY
2022-02-09 458-463 7XXX which blocks → TON80 COMMUNICATIONS, LLC 516J JOSEPH OR
2022-02-09 458-632 7XXX8XXX9XXX · 3 holders which blocks → TON80 COMMUNICATIONS, LLC 516J IONE OR
2022-02-09 769-284 0–9 XXXall 10 · 4 holders which blocks → POWERTEL MEMPHIS LICENSES, INC. 7474 CANTON MS
2022-02-09 774-686 0–9 XXXall 10 · 4 holders which blocks → TON80 COMMUNICATIONS, LLC 516J MILFORD MA
2022-02-09 854-846 0–9 XXXall 10 · 6 holders which blocks → TON80 COMMUNICATIONS, LLC 516J BEAUFORT SC
2022-02-09 857-746 0–9 XXXall 10 · 4 holders which blocks → TON80 COMMUNICATIONS, LLC 516J BROOKLINE MA
2022-02-09 915-296 0–9 XXXall 10 · 5 holders which blocks → T-MOBILE USA, INC. 6529 EL PASO TX
2022-02-09 920-714 0–9 XXXall 10 · 5 holders which blocks → T-MOBILE USA, INC. 6529 APPLETON WI
2022-02-09 928-481 2XXX9XXX · 2 holders which blocks → NEW CINGULAR WIRELESS PCS, LLC 6010 BLUE RIDGE AZ
2022-02-09 928-609 2XXX9XXX · 2 holders which blocks → NEW CINGULAR WIRELESS PCS, LLC 6010 GREENEHVN AZ
2022-02-09 928-631 2XXX3XXX4XXX9XXX · 2 holders which blocks → NEW CINGULAR WIRELESS PCS, LLC 6010 MORMONLAKE AZ
2022-02-09 945-446 0–9 XXXall 10 · 3 holders which blocks → TON80 COMMUNICATIONS, LLC 516J CARROLLTON TX
2022-02-09 970-899 8XXX9XXX · 2 holders which blocks → NEW CINGULAR WIRELESS PCS, LLC 6010 LODORE CO
2022-02-08 223-678 0XXX1XXX5XXX6XXX8XXX9XXX · 6 holders which blocks → TON80 COMMUNICATIONS, LLC 516J SCHAEFESTN PA
2022-02-08 276-874 0–9 XXXall 10 · 2 holders which blocks → TON80 COMMUNICATIONS, LLC 516J NORTON VA
2022-02-08 305-427 0–9 XXXwhole prefix which blocks → OMNIPOINT MIAMI E LICENSE, LLC 6889 MIAMI FL
2022-02-08 305-464 0–9 XXXwhole prefix which blocks → OMNIPOINT MIAMI E LICENSE, LLC 6889 MIAMI FL

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.