NumberResearch Membership · Data 09/19/2026

Recent prefix assignments

0 prefixes assigned in the last 30 days · from the daily NANPA CO code file, 09/19/2026

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
— 916-849 not yet reported which blocks → NEW CINGULAR WIRELESS PCS, LLC 6010 SCRM MAIN CA
— 916-850 0XXX2XXX3XXX4XXX5XXX7XXX9XXX · 6 holders which blocks → TELEPORT COMMUNICATIONS AMERICA, LLC - CA 7145 FOLSOM CA
— 916-851 not yet reported which blocks → PACIFIC BELL 9740 SCRM MAIN CA
— 916-852 not yet reported which blocks → PACIFIC BELL 9740 SCRM MAIN CA
— 916-853 not yet reported which blocks → PACIFIC BELL 9740 SCRM MAIN CA
— 916-854 not yet reported which blocks → PACIFIC BELL 9740 SCRM MAIN CA
— 916-855 not yet reported which blocks → PACIFIC BELL 9740 SCRM MAIN CA
— 916-856 0XXX2XXX4XXX6XXX7XXX8XXX9XXX · 2 holders which blocks → PACIFIC BELL 9740 SCRM MAIN CA
— 916-857 2XXX3XXX4XXX5XXX6XXX8XXX9XXX · 4 holders which blocks → PACIFIC BELL 9740 SCRM MAIN CA
— 916-858 9XXX which blocks → PACIFIC BELL 9740 SCRM MAIN CA
— 916-859 not yet reported which blocks → PACIFIC BELL 9740 SCRM MAIN CA
— 916-860 4XXX5XXX6XXX7XXX8XXX9XXX · 5 holders which blocks → MATRIX TELECOM, LLC. S/I/I TNCI - CA 7379 FAIR OAKS CA
— 916-861 not yet reported which blocks → PACIFIC BELL 9740 SCRM MAIN CA
— 916-863 4XXX which blocks → PACIFIC BELL 9740 FAIR OAKS CA
— 916-864 1XXX2XXX3XXX9XXX · 3 holders which blocks → PACIFIC BELL 9740 FAIR OAKS CA
— 916-866 0XXX2XXX3XXX4XXX5XXX7XXX8XXX9XXX · 4 holders which blocks → MATRIX TELECOM, LLC. S/I/I TNCI - CA 7379 FAIR OAKS CA
— 916-867 not yet reported which blocks → PACIFIC BELL 9740 FAIR OAKS CA
— 916-868 1XXX2XXX3XXX4XXX5XXX6XXX7XXX8XXX9XXX · 2 holders which blocks → XO CALIFORNIA, INC. 7262 SCRM MAIN CA
— 916-869 none assigned yet which blocks → METROPCS, INC. 5562 SCRM MAIN CA
— 916-870 none assigned yet which blocks → METROPCS, INC. 5562 SCRM MAIN CA
— 916-871 8XXX9XXX · 2 holders which blocks → METROPCS, INC. 5562 RSVL MAIN CA
— 916-874 not yet reported which blocks → PACIFIC BELL 9740 SCRM MAIN CA
— 916-875 not yet reported which blocks → PACIFIC BELL 9740 SCRM MAIN CA
— 916-876 not yet reported which blocks → PACIFIC BELL 9740 SCRM NORTH CA
— 916-878 0–9 XXXall 10 · 4 holders which blocks → CONSOLIDATED COMMUNICATIONS OF CALIFORNIA COMPANY 2334 RSVL MAIN CA
— 916-880 0XXX1XXX3XXX6XXX7XXX8XXX · 5 holders which blocks → LEVEL 3 COMMUNICATIONS, LLC - CA 8826 FAIR OAKS CA
— 916-881 not yet reported which blocks → 33 WIRELESS INC. 6967 SCRM MAIN CA
— 916-888 0–9 XXXall 10 · 2 holders which blocks → ONVOY, LLC - CA 649C RSVL MAIN CA
— 916-893 0–9 XXXwhole prefix which blocks → METROPCS, INC. 5562 SCRM MAIN CA
— 916-900 0–9 XXXall 10 · 8 holders which blocks → BANDWIDTH.COM CLEC, LLC - CA 981E SCRM NORTH CA
— 916-901 not yet reported which blocks → AMERICAN MESSAGING SERVICES, LLC 9748 SCRM MAIN CA
— 916-903 0XXX2XXX3XXX4XXX5XXX6XXX7XXX8XXX9XXX · 4 holders which blocks → U.S. TELEPACIFIC CORP. DBA TPX COMMUNICATIONS 671J FAIR OAKS CA
— 916-904 0XXX2XXX4XXX6XXX8XXX9XXX · 3 holders which blocks → PACIFIC BELL 9740 FAIR OAKS CA
— 916-910 2XXX3XXX4XXX5XXX6XXX7XXX8XXX9XXX · 3 holders which blocks → COMCAST PHONE OF CALIFORNIA, LLC 394L RSVL CTHT CA
— 916-911 not yet reported which blocks → MULTIPLE OCN LISTING MULT XXXXXXXXXX CA
— 916-912 0XXX1XXX2XXX3XXX5XXX6XXX7XXX8XXX9XXX which blocks → LEVEL 3 COMMUNICATIONS, LLC - CA 8826 SCRM MAIN CA
— 916-914 0XXX3XXX4XXX5XXX9XXX · 3 holders which blocks → MATRIX TELECOM, LLC. S/I/I TNCI - CA 7379 SCRM MAIN CA
— 916-915 0XXX2XXX3XXX4XXX6XXX7XXX8XXX9XXX · 6 holders which blocks → LEVEL 3 COMMUNICATIONS, LLC - CA 8826 RIO LINDA CA
— 916-920 not yet reported which blocks → PACIFIC BELL 9740 SCRM NORTH CA
— 916-921 not yet reported which blocks → PACIFIC BELL 9740 SCRM NORTH CA
— 916-922 not yet reported which blocks → PACIFIC BELL 9740 SCRM NORTH CA
— 916-923 8XXX which blocks → PACIFIC BELL 9740 SCRM NORTH CA
— 916-924 not yet reported which blocks → PACIFIC BELL 9740 SCRM NORTH CA
— 916-925 not yet reported which blocks → PACIFIC BELL 9740 SCRM NORTH CA
— 916-927 not yet reported which blocks → PACIFIC BELL 9740 SCRM NORTH CA
— 916-928 not yet reported which blocks → PACIFIC BELL 9740 SCRM NORTH CA
— 916-929 not yet reported which blocks → PACIFIC BELL 9740 SCRM NORTH CA
— 916-930 6XXX which blocks → PACIFIC BELL 9740 SCRM MAIN CA
— 916-932 3XXX4XXX5XXX6XXX7XXX8XXX9XXX · 6 holders which blocks → ELECTRIC LIGHTWAVE LLC DBA ALLSTREAM 7174 FOLSOM CA
— 916-933 not yet reported which blocks → PACIFIC BELL 9740 FOLSOM CA

Source: NANPA CO Code Assignments (Utilized, All States, Public), file date 09/19/2026 — Tier A primary source, refreshed on every import. Viewing is free; bulk downloads require a membership.