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
2014-04-28 657-242 0–9 XXXall 10 · 5 holders which blocks → LEVEL 3 COMMUNICATIONS, LLC - CA 8826 ANAHEIM CA
2014-04-28 662-876 0XXX1XXX2XXX4XXX5XXX6XXX7XXX8XXX9XXX · 4 holders which blocks → BANDWIDTH.COM CLEC, LLC - MS 992E PICKENS MS
2014-04-28 808-319 0–9 XXXall 10 · 4 holders which blocks → HAWAIIAN TELCOM SERVICES COMPANY, INC. - HI 009G HILO HI
2014-04-28 845-748 0XXX2XXX3XXX4XXX5XXX8XXX · 3 holders which blocks → PEERLESS NETWORK OF NEW YORK, LLC - NY 155E POUGHKEPSI NY
2014-04-28 925-448 0–9 XXXall 10 · 6 holders which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CA 6006 WALNUT CRK CA
2014-04-28 929-275 0–9 XXXall 10 · 4 holders which blocks → MCIMETRO ACCESS TRANSMISSION SERVICES LLC - NY 7133 NWYRCYZN07 NY
2014-04-25 224-442 0–9 XXXall 10 · 4 holders which blocks → BANDWIDTH.COM CLEC, LLC - IL 984E FRANKLINPK IL
2014-04-25 302-503 0–9 XXXall 10 · 5 holders which blocks → NEW CINGULAR WIRELESS PCS, LLC - DC 4036 MILFORD DE
2014-04-25 479-320 0–9 XXXall 10 · 6 holders which blocks → SOUTHWESTERN BELL 9533 SPRINGDALE AR
2014-04-25 506-500 not yet reported which blocks → Iristel Inc. 154E Bathurst —
2014-04-25 506-501 not yet reported which blocks → Iristel Inc. 154E Edmundston —
2014-04-25 506-502 not yet reported which blocks → Iristel Inc. 154E Miramichi —
2014-04-25 614-908 0–9 XXXall 10 · 3 holders which blocks → BANDWIDTH.COM CLEC, LLC - OH 001F CANALWHSTR OH
2014-04-25 618-609 2XXX8XXX9XXX · 2 holders which blocks → NEW CINGULAR WIRELESS PCS, LLC - GA 6214 GRAYVILLE IL
2014-04-25 661-493 0–9 XXXall 10 · 7 holders which blocks → U.S. TELEPACIFIC CORP. DBA TPX COMMUNICATIONS 671J BKFD MAIN CA
2014-04-25 754-260 0–9 XXXall 10 · 6 holders which blocks → CENTURYLINK COMMUNICATIONS, LLC 508J HOLLYWOOD FL
2014-04-25 872-713 0–9 XXXall 10 · 6 holders which blocks → BANDWIDTH.COM CLEC, LLC - IL 984E CHICGOZN04 IL
2014-04-25 937-907 0–9 XXXall 10 · 6 holders which blocks → BANDWIDTH.COM CLEC, LLC - OH 001F CENTERVLLE OH
2014-04-24 209-843 0–9 XXXall 10 · 8 holders which blocks → CENTURYLINK COMMUNICATIONS, LLC 508J GALT CA
2014-04-24 270-216 0–9 XXXall 10 · 4 holders which blocks → CENTURYLINK COMMUNICATIONS, LLC 508J JORDAN KY
2014-04-24 336-663 0–9 XXXall 10 · 3 holders which blocks → PEERLESS NETWORK OF NORTH CAROLINA, LLC - NC 350F GREENSBORO NC
2014-04-24 430-206 0XXX1XXX2XXX3XXX4XXX5XXX6XXX7XXX8XXX · 4 holders which blocks → CENTURYLINK COMMUNICATIONS, LLC 508J WOLFE CITY TX
2014-04-24 786-534 0–9 XXXall 10 · 3 holders which blocks → AT&T ENTERPRISES, LLC 516C MIAMI FL
2014-04-24 832-823 0–9 XXXall 10 · 6 holders which blocks → MCIMETRO ACCESS TRANSMISSION SERVICES LLC - TX 7239 SPRING TX
2014-04-24 910-765 0–9 XXXall 10 · 3 holders which blocks → PEERLESS NETWORK OF NORTH CAROLINA, LLC - NC 350F WILMINGTON NC
2014-04-23 585-485 0–9 XXXall 10 · 5 holders which blocks → NEW CINGULAR WIRELESS PCS, LLC - DC 4036 EROCHESTER NY
2014-04-23 803-812 0XXX1XXX3XXX4XXX5XXX6XXX7XXX8XXX9XXX · 5 holders which blocks → NEW CINGULAR WIRELESS PCS, LLC - GA 6214 ALLENDALE SC
2014-04-22 229-536 0–9 XXXall 10 · 4 holders which blocks → NEW CINGULAR WIRELESS PCS, LLC - GA 6214 CAIRO GA
2014-04-22 470-434 0–9 XXXwhole prefix which blocks → MCIMETRO ACCESS TRANSMISSION SERVICES LLC - GA 7435 BUFORD GA
2014-04-22 612-930 0–9 XXXall 10 · 4 holders which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MN 5816 TWINCITIES MN
2014-04-22 614-613 0–9 XXXwhole prefix which blocks → PAETEC ITEL, LLC 829J DUBLIN OH
2014-04-22 660-312 0–9 XXXall 10 · 6 holders which blocks → CENTURYLINK COMMUNICATIONS, LLC 508J KNOBNOSTER MO
2014-04-22 661-489 0–9 XXXall 10 · 5 holders which blocks → BANDWIDTH.COM CLEC, LLC - CA 981E BKFD MAIN CA
2014-04-22 682-702 0–9 XXXall 10 · 3 holders which blocks → CENTURYLINK COMMUNICATIONS, LLC 508J CLEBURNE TX
2014-04-22 682-706 0–9 XXXall 10 · 2 holders which blocks → NEW CINGULAR WIRELESS PCS, LLC - IL 6534 ARLINGTON TX
2014-04-22 754-208 0–9 XXXall 10 · 4 holders which blocks → COMCAST IP PHONE, LLC 318J HOLLYWOOD FL
2014-04-22 816-656 0–9 XXXall 10 · 5 holders which blocks → LEVEL 3 COMMUNICATIONS, LLC - MO 4932 KANSASCITY MO
2014-04-22 858-281 0–9 XXXall 10 · 5 holders which blocks → LEVEL 3 COMMUNICATIONS, LLC - CA 8826 LA JOLLA CA
2014-04-22 912-426 0–9 XXXall 10 · 3 holders which blocks → NEW CINGULAR WIRELESS PCS, LLC - GA 6214 METTER GA
2014-04-21 385-217 0–9 XXXwhole prefix which blocks → ONVOY, LLC - UT 871E SALT LAKE UT
2014-04-21 385-404 0–9 XXXall 10 · 4 holders which blocks → BANDWIDTH.COM CLEC, LLC - UT 117F PAYSON UT
2014-04-21 385-449 0–9 XXXall 10 · 7 holders which blocks → BANDWIDTH.COM CLEC, LLC - UT 117F ALTA UT
2014-04-21 470-729 0–9 XXXall 10 · 5 holders which blocks → BANDWIDTH.COM CLEC, LLC - GA 983E CARROLLTON GA
2014-04-21 478-208 0XXX2XXX4XXX8XXX9XXX · 4 holders which blocks → NEW CINGULAR WIRELESS PCS, LLC - GA 6214 HAWKINSVL GA
2014-04-21 480-568 0–9 XXXall 10 · 3 holders which blocks → LEVEL 3 COMMUNICATIONS, LLC - AZ 3285 PHOENIX AZ
2014-04-21 480-662 0–9 XXXwhole prefix which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - AZ 6572 PHOENIX AZ
2014-04-21 480-828 0–9 XXXwhole prefix which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - AZ 6572 PHOENIX AZ
2014-04-21 573-605 0–9 XXXall 10 · 7 holders which blocks → CHARTER IP ENABLED SERVICES, LLC 792K PERRYVILLE MO
2014-04-21 804-729 0–9 XXXall 10 · 6 holders which blocks → PEERLESS NETWORK OF VIRGINIA, LLC - VA 275G RICHMOND VA
2014-04-21 862-263 0–9 XXXall 10 · 5 holders which blocks → BANDWIDTH.COM CLEC, LLC - NJ 118F MENDHAM NJ

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.