NumberResearchRecent prefix assignments
0 prefixes assigned in the last 30 days · from the daily NANPA CO code file, 09/19/2026
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 |
|---|---|---|---|---|---|---|
| — | 562-967 | 0XXX1XXX2XXX3XXX4XXX9XXX · 5 holders which blocks → | MCIMETRO ACCESS TRANSMISSION SERVICES LLC | 7229 | WHITTIER | CA |
| — | 562-968 | 0XXX3XXX4XXX5XXX6XXX7XXX8XXX9XXX · 5 holders which blocks → | TELEPORT COMMUNICATIONS AMERICA, LLC - CA | 7139 | WHITTIER | CA |
| — | 562-972 | not yet reported which blocks → | CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CA | 6006 | LONG BEACH | CA |
| — | 562-976 | not yet reported which blocks → | CA | |||
| — | 562-977 | 3XXX5XXX7XXX8XXX9XXX · 3 holders which blocks → | U.S. TELEPACIFIC CORP. DBA TPX COMMUNICATIONS | 671J | NORWALK | CA |
| — | 562-980 | 0XXX1XXX2XXX5XXX6XXX · 4 holders which blocks → | FRONTIER CALIFORNIA INC. | 2319 | LONG BEACH | CA |
| — | 562-981 | 4XXX which blocks → | FRONTIER CALIFORNIA INC. | 2319 | LONG BEACH | CA |
| — | 562-982 | 3XXX4XXX · 2 holders which blocks → | FRONTIER CALIFORNIA INC. | 2319 | LAKEWOOD | CA |
| — | 562-983 | not yet reported which blocks → | FRONTIER CALIFORNIA INC. | 2319 | LONG BEACH | CA |
| — | 562-984 | not yet reported which blocks → | FRONTIER CALIFORNIA INC. | 2319 | LONG BEACH | CA |
| — | 562-985 | not yet reported which blocks → | FRONTIER CALIFORNIA INC. | 2319 | ALAMITOS | CA |
| — | 562-986 | 0XXX3XXX8XXX · 3 holders which blocks → | FRONTIER CALIFORNIA INC. | 2319 | ALAMITOS | CA |
| — | 562-987 | not yet reported which blocks → | FRONTIER CALIFORNIA INC. | 2319 | ALAMITOS | CA |
| — | 562-988 | not yet reported which blocks → | FRONTIER CALIFORNIA INC. | 2319 | LONG BEACH | CA |
| — | 562-989 | not yet reported which blocks → | FRONTIER CALIFORNIA INC. | 2319 | LONG BEACH | CA |
| — | 562-997 | not yet reported which blocks → | FRONTIER CALIFORNIA INC. | 2319 | LONG BEACH | CA |
| — | 562-999 | 1XXX2XXX3XXX4XXX5XXX6XXX7XXX9XXX · 6 holders which blocks → | U.S. TELEPACIFIC CORP. DBA TPX COMMUNICATIONS | 671J | LONG BEACH | 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.