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
2012-06-19 307-312 0–9 XXXall 10 · 4 holders which blocks → BANDWIDTH.COM CLEC, LLC - WY 081F WSPEARFISH WY
2012-06-19 343-290 not yet reported which blocks → Zayo Canada Inc. 8304 Kingston —
2012-06-19 405-667 0–9 XXXwhole prefix which blocks → T-MOBILE USA, INC. 6529 OKLA CITY OK
2012-06-19 434-333 0–9 XXXall 10 · 6 holders which blocks → CORETEL VIRGINIA, LLC - VA 5832 LYNCHBURG VA
2012-06-19 515-329 0–9 XXXall 10 · 3 holders which blocks → BANDWIDTH.COM CLEC, LLC - IA 985E POLK CITY IA
2012-06-19 647-792 not yet reported which blocks → Distributel 082E Toronto —
2012-06-19 681-222 0–9 XXXall 10 · 4 holders which blocks → CORETEL WEST VIRGINIA, INC. - WV 5833 BECKLEY WV
2012-06-19 681-319 0–9 XXXall 10 · 4 holders which blocks → CORETEL WEST VIRGINIA, INC. - WV 5833 CHRLSTNZN1 WV
2012-06-19 681-888 0–9 XXXall 10 · 4 holders which blocks → CORETEL WEST VIRGINIA, INC. - WV 5833 HNTNGTNZN1 WV
2012-06-19 705-408 not yet reported which blocks → Zayo Canada Inc. 8304 Barrie —
2012-06-19 781-206 0–9 XXXall 10 · 5 holders which blocks → NEW CINGULAR WIRELESS PCS, LLC - DC 4036 NORWELL MA
2012-06-19 828-662 0–9 XXXall 10 · 5 holders which blocks → BANDWIDTH.COM CLEC, LLC - NC 998E LIBERTY-CH NC
2012-06-19 918-984 0–9 XXXall 10 · 5 holders which blocks → BANDWIDTH.COM CLEC, LLC - OK 119F TULSA OK
2012-06-18 204-595 not yet reported which blocks → TELUS Mobility 8303 Portage La Prairie —
2012-06-18 204-596 not yet reported which blocks → TELUS Mobility 8303 Brandon —
2012-06-18 352-707 0–9 XXXall 10 · 5 holders which blocks → TELEPORT COMMUNICATIONS AMERICA, LLC - FL 8300 UMATILLA FL
2012-06-18 412-742 0–9 XXXall 10 · 2 holders which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - PA 6392 PTTSBGZON1 PA
2012-06-18 438-932 not yet reported which blocks → TELUS Mobility 8303 Montreal —
2012-06-18 530-360 0–9 XXXall 10 · 4 holders which blocks → METROPCS, INC. 5562 ANDERSON CA
2012-06-18 646-776 0–9 XXXall 10 · 4 holders which blocks → CABLEVISION LIGHTPATH, INC. - NY 7126 NWYRCYZN01 NY
2012-06-18 647-655 not yet reported which blocks → TELUS Mobility 8303 Toronto —
2012-06-18 980-442 0–9 XXXwhole prefix which blocks → WINDSTREAM COMMUNICATIONS, INC. - NC 7970 CHARLOTTE NC
2012-06-15 343-477 not yet reported which blocks → ISP Telecom Inc. 4727 Kingston —
2012-06-15 343-478 not yet reported which blocks → ISP Telecom Inc. 4727 Napanee —
2012-06-15 343-479 not yet reported which blocks → ISP Telecom Inc. 4727 Gananoque —
2012-06-15 480-432 0–9 XXXwhole prefix which blocks → NEW CINGULAR WIRELESS PCS, LLC 6010 PHOENIX AZ
2012-06-15 579-243 not yet reported which blocks → TELUS Quebec 2243 Sorel —
2012-06-15 579-244 not yet reported which blocks → TELUS Quebec 2243 Joliette —
2012-06-15 706-514 0–9 XXXall 10 · 4 holders which blocks → BANDWIDTH.COM CLEC, LLC - GA 983E MCCAYSVL GA
2012-06-15 918-921 0–9 XXXall 10 · 3 holders which blocks → BANDWIDTH.COM CLEC, LLC - OK 119F TULSA OK
2012-06-14 315-888 0XXX1XXX3XXX4XXX5XXX6XXX7XXX8XXX9XXX · 4 holders which blocks → FINGER LAKES TECHNOLOGIES GROUP, INC. - NY 629E AMBER NY
2012-06-14 512-813 0–9 XXXall 10 · 4 holders which blocks → MCIMETRO ACCESS TRANSMISSION SERVICES LLC - TX 7249 AUSTIN TX
2012-06-14 619-289 0–9 XXXall 10 · 3 holders which blocks → NEW CINGULAR WIRELESS PCS, LLC 6010 CHULAVISTA CA
2012-06-14 832-714 0–9 XXXall 10 · 3 holders which blocks → LEVEL 3 OF TELECOM OF TEXAS, LLC - TX 7074 HOUSTON TX
2012-06-14 903-412 0XXX1XXX2XXX3XXX4XXX5XXX7XXX8XXX9XXX · 6 holders which blocks → BANDWIDTH.COM CLEC, LLC - TX 004F SHIRLEY TX
2012-06-13 276-302 0–9 XXXall 10 · 8 holders which blocks → BANDWIDTH.COM CLEC, LLC - VA 079F CLINTWOOD VA
2012-06-13 352-300 0–9 XXXall 10 · 3 holders which blocks → PAETEC ITEL, LLC 829J OCALA FL
2012-06-13 469-315 0–9 XXXall 10 · 3 holders which blocks → NEW CINGULAR WIRELESS PCS, LLC - IL 6534 GRANDPRARI TX
2012-06-13 502-822 0–9 XXXall 10 · 6 holders which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - KY 6500 LOUISVILLE KY
2012-06-13 509-821 0–9 XXXall 10 · 6 holders which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - WA 5812 DEER PARK WA
2012-06-13 571-375 0–9 XXXall 10 · 5 holders which blocks → MCIMETRO ACCESS TRANSMISSION SERVICES LLC 7229 HERNDON VA
2012-06-13 702-721 0–9 XXXall 10 · 4 holders which blocks → NEW CINGULAR WIRELESS PCS, LLC 6010 LAS VEGAS NV
2012-06-13 731-741 0–9 XXXall 10 · 5 holders which blocks → TWC IP ENABLED SERVICES, LLC 793K BROWNSVL TN
2012-06-13 859-469 0–9 XXXall 10 · 5 holders which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - KY 6500 LEXINGTON KY
2012-06-13 919-916 0–9 XXXall 10 · 4 holders which blocks → NEW CINGULAR WIRELESS PCS, LLC - GA 6214 RALEIGH NC
2012-06-12 234-218 0–9 XXXall 10 · 5 holders which blocks → BANDWIDTH.COM CLEC, LLC - OH 001F GARRETTSVL OH
2012-06-12 269-215 0–9 XXXall 10 · 6 holders which blocks → BANDWIDTH.COM CLEC, LLC - MI 991E RICHLAND MI
2012-06-12 269-431 0–9 XXXall 10 · 4 holders which blocks → BANDWIDTH.COM CLEC, LLC - MI 991E GALIEN MI
2012-06-12 512-774 0–9 XXXall 10 · 4 holders which blocks → BANDWIDTH.COM CLEC, LLC - TX 004F AUSTIN TX
2012-06-12 586-315 0–9 XXXall 10 · 5 holders which blocks → BANDWIDTH.COM CLEC, LLC - MI 991E NEW HAVEN MI

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.