NumberResearchRecent prefix assignments
0 prefixes assigned in the last 30 days · from the daily NANPA CO code file, 09/20/2026
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 |
|---|---|---|---|---|---|---|
| — | 603-943 | 5XXX7XXX8XXX which blocks → | OMNIPOINT MIAMI E LICENSE, LLC | 6889 | NASHUA | NH |
| — | 603-947 | 7XXX which blocks → | FREEDOM RING COMMUNICATIONS, LLC | 8468 | PLYMOUTH | NH |
| — | 603-950 | not yet reported which blocks → | NH | |||
| — | 603-951 | 0XXX2XXX · 2 holders which blocks → | LEVEL 3 COMMUNICATIONS, LLC - NH | 4017 | MILAN | NH |
| — | 603-952 | 0XXX1XXX2XXX3XXX5XXX6XXX7XXX8XXX9XXX · 3 holders which blocks → | LEVEL 3 COMMUNICATIONS, LLC - NH | 4017 | SALEM | NH |
| — | 603-953 | 3XXX4XXX5XXX6XXX7XXX8XXX · 2 holders which blocks → | PAETEC ITEL, LLC | 829J | DOVER | NH |
| — | 603-958 | not yet reported which blocks → | NH | |||
| — | 603-959 | not yet reported which blocks → | NH | |||
| — | 603-964 | 0XXX which blocks → | CONSOLIDATED COMM OF NO. NEW ENGLAND-NH | 5113 | RYE BEACH | NH |
| — | 603-965 | 2XXX3XXX4XXX5XXX6XXX7XXX8XXX · 5 holders which blocks → | PAETEC ITEL, LLC | 829J | DERRY | NH |
| — | 603-967 | 8XXX which blocks → | LEVEL 3 COMMUNICATIONS, LLC - NH | 4017 | HAMPTON | NH |
| — | 603-968 | 0XXX1XXX4XXX5XXX6XXX · 4 holders which blocks → | CONSOLIDATED COMM OF NO. NEW ENGLAND-NH | 5113 | ASHLAND | NH |
| — | 603-971 | 0XXX2XXX6XXX · 3 holders which blocks → | FREEDOM RING COMMUNICATIONS, LLC | 8468 | RINDGE | NH |
| — | 603-974 | 0XXX3XXX5XXX7XXX8XXX9XXX · 4 holders which blocks → | COMCAST IP PHONE, LLC | 318J | PLAISTOW | NH |
| — | 603-976 | not yet reported which blocks → | NH | |||
| — | 603-989 | 2XXX7XXX8XXX · 3 holders which blocks → | CONSOLIDATED COMM OF NO. NEW ENGLAND-NH | 5113 | PIKE | NH |
| — | 603-992 | 2XXX which blocks → | LEVEL 3 COMMUNICATIONS, LLC - NH | 4017 | DANBURY | NH |
| — | 603-994 | not yet reported which blocks → | FREEDOM RING COMMUNICATIONS, LLC | 8468 | ROCHESTER | NH |
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.