NumberResearch Membership · Data 09/20/2026

Recent prefix assignments

0 prefixes assigned in the last 30 days · from the daily NANPA CO code file, 09/20/2026

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, all time — NPA 916
PACIFIC BELL 237
NEW CINGULAR WIRELESS PCS, LLC 77
CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CA 60
METROPCS, INC. 49
T-MOBILE USA, INC. 40
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
— 916-778 0XXX3XXX5XXX6XXX7XXX8XXX9XXX · 4 holders which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CA 6006 SO PLACER CA
— 916-779 4XXX6XXX7XXX8XXX9XXX · 3 holders which blocks → ELECTRIC LIGHTWAVE LLC DBA ALLSTREAM 7174 SCRM NORTH CA
— 916-780 not yet reported which blocks → CONSOLIDATED COMMUNICATIONS OF CALIFORNIA COMPANY 2334 RSVL MAIN CA
— 916-781 not yet reported which blocks → CONSOLIDATED COMMUNICATIONS OF CALIFORNIA COMPANY 2334 RSVL MAIN CA
— 916-782 not yet reported which blocks → CONSOLIDATED COMMUNICATIONS OF CALIFORNIA COMPANY 2334 RSVL MAIN CA
— 916-783 none assigned yet which blocks → CONSOLIDATED COMMUNICATIONS OF CALIFORNIA COMPANY 2334 RSVL MAIN CA
— 916-784 not yet reported which blocks → CONSOLIDATED COMMUNICATIONS OF CALIFORNIA COMPANY 2334 RSVL MAIN CA
— 916-785 not yet reported which blocks → FIDIUM ENTERPRISE SERVICES, LLC 3964 RSVL MAIN CA
— 916-786 not yet reported which blocks → CONSOLIDATED COMMUNICATIONS OF CALIFORNIA COMPANY 2334 RSVL MAIN CA
— 916-787 not yet reported which blocks → CONSOLIDATED COMMUNICATIONS OF CALIFORNIA COMPANY 2334 RSVL MAIN CA
— 916-788 not yet reported which blocks → CONSOLIDATED COMMUNICATIONS OF CALIFORNIA COMPANY 2334 RSVL MAIN CA
— 916-789 3XXX which blocks → CONSOLIDATED COMMUNICATIONS OF CALIFORNIA COMPANY 2334 RSVL MAIN CA
— 916-791 not yet reported which blocks → CONSOLIDATED COMMUNICATIONS OF CALIFORNIA COMPANY 2334 RSVL MAIN CA
— 916-794 0XXX1XXX2XXX3XXX5XXX6XXX7XXX8XXX9XXX · 5 holders which blocks → LEVEL 3 COMMUNICATIONS, LLC - CA 8826 MICHIGNBAR CA
— 916-797 not yet reported which blocks → CONSOLIDATED COMMUNICATIONS OF CALIFORNIA COMPANY 2334 RSVL MAIN CA
— 916-798 not yet reported which blocks → NEW CINGULAR WIRELESS PCS, LLC 6010 SCRM MAIN CA
— 916-799 not yet reported which blocks → NEW CINGULAR WIRELESS PCS, LLC 6010 SCRM MAIN CA
— 916-800 0–9 XXXall 10 · 2 holders which blocks → BANDWIDTH.COM CLEC, LLC - CA 981E SCRM MAIN CA
— 916-801 not yet reported which blocks → NEW CINGULAR WIRELESS PCS, LLC 6010 SCRM MAIN CA
— 916-802 not yet reported which blocks → NEW CINGULAR WIRELESS PCS, LLC 6010 SCRM MAIN CA
— 916-803 not yet reported which blocks → NEW CINGULAR WIRELESS PCS, LLC 6010 SCRM MAIN CA
— 916-804 not yet reported which blocks → NEW CINGULAR WIRELESS PCS, LLC 6010 SCRM MAIN CA
— 916-806 not yet reported which blocks → NEW CINGULAR WIRELESS PCS, LLC 6010 SCRM MAIN CA
— 916-807 1XXX2XXX3XXX5XXX6XXX7XXX8XXX9XXX · 2 holders which blocks → NEW CINGULAR WIRELESS PCS, LLC 6010 SCRM MAIN CA
— 916-808 not yet reported which blocks → PACIFIC BELL 9740 SCRM MAIN CA
— 916-810 not yet reported which blocks → BANDWIDTH.COM CLEC, LLC - CA 981E SCRM MAIN CA
— 916-811 not yet reported which blocks → MULTIPLE OCN LISTING MULT XXXXXXXXXX CA
— 916-812 not yet reported which blocks → NEW CINGULAR WIRELESS PCS, LLC 6010 SCRM MAIN CA
— 916-813 not yet reported which blocks → NEW CINGULAR WIRELESS PCS, LLC 6010 SCRM MAIN CA
— 916-814 not yet reported which blocks → SPOK, INC. 6630 SCRM MAIN CA
— 916-815 not yet reported which blocks → SPOK, INC. 6630 SCRM MAIN CA
— 916-816 not yet reported which blocks → SPOK, INC. 6630 SCRM MAIN CA
— 916-817 0XXX1XXX7XXX9XXX · 2 holders which blocks → PACIFIC BELL 9740 FOLSOM CA
— 916-819 not yet reported which blocks → SPOK, INC. 6630 SCRM MAIN CA
— 916-824 1XXX2XXX3XXX4XXX5XXX6XXX7XXX8XXX9XXX · 7 holders which blocks → TELEPORT COMMUNICATIONS AMERICA, LLC - CA 7145 SO PLACER CA
— 916-825 none assigned yet which blocks → METROPCS, INC. 5562 SCRM MAIN CA
— 916-826 none assigned yet which blocks → METROPCS, INC. 5562 SCRM MAIN CA
— 916-828 not yet reported which blocks → SPOK, INC. 6630 SCRM MAIN CA
— 916-830 not yet reported which blocks → TELEPORT COMMUNICATIONS AMERICA, LLC - CA 7145 SCRM NORTH CA
— 916-832 2XXX3XXX4XXX5XXX7XXX9XXX which blocks → NEW CINGULAR WIRELESS PCS, LLC 6010 SCRM MAIN CA
— 916-833 2XXX4XXX5XXX7XXX8XXX9XXX which blocks → NEW CINGULAR WIRELESS PCS, LLC 6010 SCRM MAIN CA
— 916-834 not yet reported which blocks → NEW CINGULAR WIRELESS PCS, LLC 6010 SCRM MAIN CA
— 916-835 not yet reported which blocks → NEW CINGULAR WIRELESS PCS, LLC 6010 SCRM MAIN CA
— 916-837 not yet reported which blocks → NEW CINGULAR WIRELESS PCS, LLC 6010 SCRM MAIN CA
— 916-838 not yet reported which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CA 6006 SCRM MAIN CA
— 916-843 not yet reported which blocks → PACIFIC BELL 9740 SCRM MAIN CA
— 916-844 2XXX3XXX4XXX5XXX6XXX7XXX8XXX9XXX · 4 holders which blocks → ELECTRIC LIGHTWAVE LLC DBA ALLSTREAM 7174 FAIR OAKS CA
— 916-845 not yet reported which blocks → PACIFIC BELL 9740 SCRM MAIN CA
— 916-847 not yet reported which blocks → NEW CINGULAR WIRELESS PCS, LLC 6010 FAIR OAKS CA
— 916-848 1XXX2XXX4XXX5XXX6XXX7XXX8XXX9XXX · 3 holders which blocks → MATRIX TELECOM, LLC. S/I/I TNCI - CA 7379 SCRM MAIN CA

Source: NANPA CO Code Assignments (Utilized, All States, Public), file date 09/20/2026 — Tier A primary source, refreshed on every import. Viewing is free; bulk downloads require a membership.