Recent prefix assignments
375 prefixes assigned in the last 30 days · from the daily NANPA CO code file, 09/30/2026
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.
| Assigned | NPA-NXX | Thousands-blocks taken (last-4 opening) | Code holder | OCN | Rate center | State |
|---|---|---|---|---|---|---|
| — | 530-861 | 0XXX3XXX4XXX5XXX6XXX8XXX9XXX · 4 holders which blocks → | IP HORIZON LLC | 515J | VINA | CA |
| — | 530-862 | 2XXX3XXX4XXX5XXX6XXX7XXX8XXX9XXX · 4 holders which blocks → | PACIFIC BELL | 9740 | DOWNIEVL | CA |
| — | 530-864 | not yet reported which blocks → | NEW CINGULAR WIRELESS PCS, LLC | 6010 | CHICO | CA |
| — | 530-865 | not yet reported which blocks → | PACIFIC BELL | 9740 | ORLAND | CA |
| — | 530-867 | 8XXX9XXX · 2 holders which blocks → | NEW CINGULAR WIRELESS PCS, LLC | 6010 | WOODLAND | CA |
| — | 530-868 | 0XXX3XXX4XXX6XXX7XXX8XXX9XXX · 7 holders which blocks → | PACIFIC BELL | 9740 | BIGGS | CA |
| — | 530-869 | 1XXX5XXX6XXX7XXX8XXX9XXX · 4 holders which blocks → | COMCAST PHONE OF CALIFORNIA, LLC | 394L | BIGGS | CA |
| — | 530-871 | 9XXX which blocks → | BANDWIDTH.COM CLEC, LLC - CA | 981E | OROVILLE | CA |
| — | 530-872 | not yet reported which blocks → | PACIFIC BELL | 9740 | PARADISE | CA |
| — | 530-873 | 7XXX8XXX · 2 holders which blocks → | PACIFIC BELL | 9740 | PARADISE | CA |
| — | 530-876 | 4XXX5XXX6XXX · 2 holders which blocks → | PACIFIC BELL | 9740 | PARADISE | CA |
| — | 530-877 | not yet reported which blocks → | PACIFIC BELL | 9740 | PARADISE | CA |
| — | 530-878 | 5XXX which blocks → | PACIFIC BELL | 9740 | AUBN MAIN | CA |
| — | 530-879 | not yet reported which blocks → | PACIFIC BELL | 9740 | CHICO | CA |
| — | 530-882 | 0XXX2XXX3XXX5XXX7XXX8XXX · 4 holders which blocks → | PACIFIC BELL | 9740 | RICHVALE | CA |
| — | 530-883 | 0XXX2XXX3XXX4XXX7XXX8XXX · 5 holders which blocks → | ONVOY, LLC - CA | 649C | AUBN MAIN | CA |
| — | 530-884 | 4XXX5XXX6XXX7XXX8XXX9XXX · 3 holders which blocks → | LEVEL 3 COMMUNICATIONS, LLC - CA | 8826 | BUTTE CITY | CA |
| — | 530-885 | not yet reported which blocks → | PACIFIC BELL | 9740 | AUBN MAIN | CA |
| — | 530-886 | 7XXX9XXX · 2 holders which blocks → | PACIFIC BELL | 9740 | AUBN MAIN | CA |
| — | 530-887 | 4XXX which blocks → | PACIFIC BELL | 9740 | AUBN MAIN | CA |
| — | 530-888 | 5XXX which blocks → | PACIFIC BELL | 9740 | AUBN MAIN | CA |
| — | 530-889 | not yet reported which blocks → | PACIFIC BELL | 9740 | AUBN MAIN | CA |
| — | 530-890 | not yet reported which blocks → | AMERICAN MESSAGING SERVICES, LLC | 9748 | PLVL WEST | CA |
| — | 530-891 | not yet reported which blocks → | PACIFIC BELL | 9740 | CHICO | CA |
| — | 530-892 | none assigned yet which blocks → | PACIFIC BELL | 9740 | CHICO | CA |
| — | 530-893 | not yet reported which blocks → | PACIFIC BELL | 9740 | CHICO | CA |
| — | 530-894 | none assigned yet which blocks → | PACIFIC BELL | 9740 | CHICO | CA |
| — | 530-895 | not yet reported which blocks → | PACIFIC BELL | 9740 | CHICO | CA |
| — | 530-896 | 5XXX which blocks → | PACIFIC BELL | 9740 | CHICO | CA |
| — | 530-897 | 2XXX8XXX · 2 holders which blocks → | PACIFIC BELL | 9740 | CHICO | CA |
| — | 530-898 | not yet reported which blocks → | PACIFIC BELL | 9740 | CHICO | CA |
| — | 530-899 | not yet reported which blocks → | PACIFIC BELL | 9740 | CHICO | CA |
| — | 530-900 | 0XXX1XXX2XXX3XXX4XXX5XXX7XXX8XXX9XXX · 6 holders which blocks → | TELNYX LLC | 073H | CORNING | CA |
| — | 530-902 | 5XXX6XXX which blocks → | CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CA | 6006 | DAVIS | CA |
| — | 530-903 | 1XXX2XXX3XXX4XXX5XXX6XXX7XXX8XXX · 5 holders which blocks → | T-MOBILE USA, INC. | 6529 | PLVL WEST | CA |
| — | 530-905 | 4XXX5XXX6XXX7XXX8XXX9XXX · 4 holders which blocks → | UNITED STATES CELLULAR - CA | 6261 | YREKA | CA |
| — | 530-906 | not yet reported which blocks → | CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CA | 6006 | AUBN MAIN | CA |
| — | 530-908 | not yet reported which blocks → | CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CA | 6006 | WOODLAND | CA |
| — | 530-911 | not yet reported which blocks → | MULTIPLE OCN LISTING | MULT | XXXXXXXXXX | CA |
| — | 530-913 | not yet reported which blocks → | CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CA | 6006 | GRVY MAIN | CA |
| — | 530-917 | 1XXX2XXX3XXX7XXX8XXX · 2 holders which blocks → | NEW CINGULAR WIRELESS PCS, LLC | 6010 | REDDING | CA |
| — | 530-918 | 2XXX3XXX4XXX5XXX6XXX8XXX · 4 holders which blocks → | PACIFIC BELL | 9740 | MT SHASTA | CA |
| — | 530-919 | not yet reported which blocks → | CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CA | 6006 | PLVL WEST | CA |
| — | 530-924 | 0XXX2XXX3XXX4XXX5XXX6XXX7XXX · 3 holders which blocks → | CENTURYLINK COMMUNICATIONS, LLC | 508J | CHICO | CA |
| — | 530-925 | 6XXX7XXX9XXX · 2 holders which blocks → | CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CA | 6006 | MT SHASTA | CA |
| — | 530-926 | not yet reported which blocks → | PACIFIC BELL | 9740 | MT SHASTA | CA |
| — | 530-927 | 0XXX3XXX4XXX5XXX6XXX7XXX8XXX9XXX · 5 holders which blocks → | CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CA | 6006 | QUINCY | CA |
| — | 530-931 | 0XXX1XXX2XXX3XXX4XXX8XXX · 6 holders which blocks → | UNITED STATES CELLULAR - CA | 6261 | SUSANVILLE | CA |
| — | 530-934 | not yet reported which blocks → | PACIFIC BELL | 9740 | WILLOWS | CA |
| — | 530-936 | 3XXX4XXX5XXX6XXX7XXX8XXX9XXX · 5 holders which blocks → | LEVEL 3 COMMUNICATIONS, LLC - CA | 8826 | ORLAND | CA |
Source: NANPA CO Code Assignments (Utilized, All States, Public), file date 09/30/2026 — Tier A primary source, refreshed on every import. Viewing is free; bulk downloads require a membership.