NumberResearch Membership · Data 09/29/2026

Recent prefix assignments

347 prefixes assigned in the last 30 days · from the daily NANPA CO code file, 09/29/2026

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
Rogers Communications Canada Inc. (Wireless) 23
NEW CINGULAR WIRELESS PCS, LLC - IL 23
ONVOY, LLC - CA 19
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
2019-05-07 816-652 0–9 XXXall 10 · 5 holders which blocks → BANDWIDTH.COM CLEC, LLC - MO 993E KANSASCITY MO
2019-05-07 870-721 2XXX which blocks → LEVEL 3 COMMUNICATIONS, LLC - AR 5179 WASHINGTON AR
2019-05-07 902-666 not yet reported which blocks → IXICA Communications Inc. 812H Halifax —
2019-05-07 910-701 0XXX1XXX2XXX3XXX4XXX5XXX6XXX8XXX9XXX · 5 holders which blocks → BANDWIDTH.COM CLEC, LLC - NC 998E CARTHAGE NC
2019-05-07 956-471 0–9 XXXwhole prefix which blocks → NEW CINGULAR WIRELESS PCS, LLC - IL 6534 LAREDO TX
2019-05-06 213-462 0–9 XXXall 10 · 5 holders which blocks → T-MOBILE USA, INC. 6529 LSAN DA 01 CA
2019-05-06 249-489 not yet reported which blocks → Iristel Inc. 154E Barrie —
2019-05-06 385-304 0–9 XXXall 10 · 3 holders which blocks → NEW CINGULAR WIRELESS PCS, LLC 6010 AMERCNFORK UT
2019-05-06 424-434 0–9 XXXall 10 · 7 holders which blocks → TWC IP ENABLED SERVICES, LLC 793K CULVERCITY CA
2019-05-06 470-501 0–9 XXXwhole prefix which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - GA 6540 ATLANTA GA
2019-05-06 506-496 not yet reported which blocks → Iristel Inc. 154E Bathurst —
2019-05-06 509-864 0XXX1XXX4XXX6XXX7XXX8XXX · 2 holders which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - WA 5812 TOPPENISH WA
2019-05-06 747-313 0–9 XXXall 10 · 4 holders which blocks → T-MOBILE USA, INC. 6529 BRBN BRBN CA
2019-05-06 908-540 0–9 XXXall 10 · 5 holders which blocks → BANDWIDTH.COM CLEC, LLC - NJ 118F PLAINFIELD NJ
2019-05-03 365-809 not yet reported which blocks → Iristel Inc. 154E Aurora —
2019-05-03 407-813 0–9 XXXall 10 · 2 holders which blocks → ONVOY, LLC - FL 937C ORLANDO FL
2019-05-03 407-946 0–9 XXXall 10 · 3 holders which blocks → LEVEL 3 COMMUNICATIONS, LLC - FL 4802 ORLANDO FL
2019-05-03 423-590 0–9 XXXwhole prefix which blocks → BANDWIDTH.COM CLEC, LLC - TN 124F SO PITTSBG TN
2019-05-03 469-627 0–9 XXXall 10 · 5 holders which blocks → TELEPORT COMMUNICATIONS AMERICA, LLC - TX 7148 DALLAS TX
2019-05-03 469-649 0–9 XXXall 10 · 4 holders which blocks → BANDWIDTH.COM CLEC, LLC - TX 004F PLANO TX
2019-05-03 530-670 0–9 XXXall 10 · 5 holders which blocks → ONVOY, LLC - CA 649C CORNING CA
2019-05-03 581-203 not yet reported which blocks → Iristel Inc. 154E Alma —
2019-05-03 682-295 0–9 XXXwhole prefix which blocks → LEVEL 3 COMMUNICATIONS, LLC - TX 6114 FORT WORTH TX
2019-05-03 786-677 0–9 XXXall 10 · 4 holders which blocks → BANDWIDTH.COM CLEC, LLC - FL 982E KEYS FL
2019-05-03 831-231 0–9 XXXall 10 · 2 holders which blocks → ONVOY SPECTRUM, LLC 624H GREENFIELD CA
2019-05-03 843-983 0–9 XXXall 10 · 4 holders which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - SC 6398 ANDREWS SC
2019-05-03 873-728 not yet reported which blocks → Iristel Inc. 154E Amos —
2019-05-02 269-867 0XXX1XXX2XXX3XXX5XXX7XXX8XXX9XXX · 5 holders which blocks → COMMIO, LLC 939H BERRIENSPG MI
2019-05-02 313-488 0–9 XXXall 10 · 4 holders which blocks → COMMIO, LLC 939H DETROITZN1 MI
2019-05-02 365-298 not yet reported which blocks → Iristel Inc. 154E Ajax-Pickering —
2019-05-02 407-789 0–9 XXXall 10 · 3 holders which blocks → BANDWIDTH.COM CLEC, LLC - FL 982E ORLANDO FL
2019-05-02 626-516 0–9 XXXwhole prefix which blocks → NEW CINGULAR WIRELESS PCS, LLC 6010 AZUSA CA
2019-05-02 737-257 0XXX1XXX2XXX3XXX4XXX5XXX6XXX8XXX9XXX · 4 holders which blocks → BANDWIDTH.COM CLEC, LLC - TX 004F SANGABRIEL TX
2019-05-02 813-560 0–9 XXXall 10 · 5 holders which blocks → AERIAL COMMUNICATIONS, INC. 6701 TAMPACEN FL
2019-05-02 949-561 0–9 XXXall 10 · 6 holders which blocks → BANDWIDTH.COM CLEC, LLC - CA 981E IRVINE CA
2019-05-02 949-571 0–9 XXXwhole prefix which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CA 6006 IRVINE CA
2019-05-02 989-988 0XXX1XXX2XXX3XXX4XXX6XXX7XXX8XXX9XXX · 2 holders which blocks → COMMIO, LLC 939H SAGINAW MI
2019-05-01 412-547 0–9 XXXall 10 · 4 holders which blocks → BANDWIDTH.COM CLEC, LLC - PA 002F CLAIRTON PA
2019-05-01 424-499 0–9 XXXall 10 · 5 holders which blocks → BANDWIDTH.COM CLEC, LLC - CA 981E EL SEGUNDO CA
2019-05-01 435-295 0–9 XXXall 10 · 6 holders which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - UT 6571 BRIGHAM CY UT
2019-05-01 516-789 0–9 XXXall 10 · 3 holders which blocks → OMNIPOINT COMMUNICATIONS, INC. - NY 6622 NASSAUZN02 NY
2019-05-01 531-221 1XXX2XXX3XXX4XXX5XXX6XXX7XXX8XXX9XXX · 3 holders which blocks → ONVOY, LLC - NE 549E SO YANKTON NE
2019-05-01 647-373 not yet reported which blocks → Iristel Inc. 154E Toronto —
2019-05-01 647-374 not yet reported which blocks → Iristel Inc. 154E Toronto —
2019-05-01 647-375 not yet reported which blocks → Iristel Inc. 154E Toronto —
2019-05-01 720-902 0–9 XXXall 10 · 2 holders which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CO 6567 DENVER CO
2019-05-01 740-752 0XXX1XXX2XXX3XXX4XXX5XXX6XXX8XXX9XXX · 7 holders which blocks → BANDWIDTH.COM CLEC, LLC - OH 001F GLENFORD OH
2019-05-01 747-292 0–9 XXXall 10 · 5 holders which blocks → BANDWIDTH.COM CLEC, LLC - CA 981E BRBN SNVY CA
2019-05-01 904-506 0–9 XXXall 10 · 4 holders which blocks → BANDWIDTH.COM CLEC, LLC - FL 982E ST JOHNS FL
2019-05-01 929-533 0–9 XXXall 10 · 4 holders which blocks → OMNIPOINT COMMUNICATIONS, INC. - NY 6622 NWYRCYZN06 NY

Source: NANPA CO Code Assignments (Utilized, All States, Public), file date 09/29/2026 — Tier A primary source, refreshed on every import. Viewing is free; bulk downloads require a membership.