NumberResearchRecent prefix assignments
0 prefixes assigned in the last 30 days · from the daily NANPA CO code file, 09/26/2026
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.
Most active assignees, all time — NPA 610
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| Assigned | NPA-NXX | Thousands-blocks taken (last-4 opening) | Code holder | OCN | Rate center | State |
|---|---|---|---|---|---|---|
| — | 610-668 | not yet reported which blocks → | VERIZON PENNSYLVANIA, INC. | 9208 | PHPHSBZN23 | PA |
| — | 610-669 | not yet reported which blocks → | VERIZON PENNSYLVANIA, INC. | 9208 | PHPHSBZN28 | PA |
| — | 610-670 | not yet reported which blocks → | VERIZON PENNSYLVANIA, INC. | 9208 | READING | PA |
| — | 610-676 | 9XXX which blocks → | VERIZON PENNSYLVANIA, INC. | 9208 | PHPHSBZN29 | PA |
| — | 610-678 | not yet reported which blocks → | VERIZON PENNSYLVANIA, INC. | 9208 | READING | PA |
| — | 610-683 | 2XXX which blocks → | VERIZON PENNSYLVANIA, INC. | 9208 | KUTZTOWN | PA |
| — | 610-687 | not yet reported which blocks → | VERIZON PENNSYLVANIA, INC. | 9208 | PHPHSBZN26 | PA |
| — | 610-688 | not yet reported which blocks → | VERIZON PENNSYLVANIA, INC. | 9208 | PHPHSBZN26 | PA |
| — | 610-690 | 9XXX which blocks → | VERIZON PENNSYLVANIA, INC. | 9208 | PHPHSBZN13 | PA |
| — | 610-691 | not yet reported which blocks → | VERIZON PENNSYLVANIA, INC. | 9208 | BETHLEHEM | PA |
| — | 610-692 | not yet reported which blocks → | VERIZON PENNSYLVANIA, INC. | 9208 | W CHESTER | PA |
| — | 610-694 | not yet reported which blocks → | VERIZON PENNSYLVANIA, INC. | 9208 | BETHLEHEM | PA |
| — | 610-695 | none assigned yet which blocks → | VERIZON PENNSYLVANIA, INC. | 9208 | PHPHSBZN28 | PA |
| — | 610-696 | not yet reported which blocks → | VERIZON PENNSYLVANIA, INC. | 9208 | W CHESTER | PA |
| — | 610-701 | 1XXX8XXX · 2 holders which blocks → | VERIZON PENNSYLVANIA, INC. | 9208 | W CHESTER | PA |
| — | 610-705 | 2XXX7XXX · 2 holders which blocks → | VERIZON PENNSYLVANIA, INC. | 9208 | POTTSTOWN | PA |
| — | 610-706 | not yet reported which blocks → | VERIZON PENNSYLVANIA, INC. | 9208 | ALLENTOWN | PA |
| — | 610-709 | 3XXX4XXX5XXX6XXX7XXX9XXX · 3 holders which blocks → | VERIZON PENNSYLVANIA, INC. | 9208 | ALLENTOWN | PA |
| — | 610-712 | 0XXX which blocks → | VERIZON PENNSYLVANIA, INC. | 9208 | ALLENTOWN | PA |
| — | 610-713 | 1XXX3XXX4XXX5XXX7XXX8XXX · 6 holders which blocks → | VERIZON PENNSYLVANIA, INC. | 9208 | PHPHSBZN17 | PA |
| — | 610-718 | 6XXX7XXX · 2 holders which blocks → | VERIZON PENNSYLVANIA, INC. | 9208 | POTTSTOWN | PA |
| — | 610-719 | 3XXX7XXX · 2 holders which blocks → | VERIZON PENNSYLVANIA, INC. | 9208 | W CHESTER | PA |
| — | 610-720 | not yet reported which blocks → | VERIZON PENNSYLVANIA, INC. | 9208 | ALLENTOWN | PA |
| — | 610-722 | not yet reported which blocks → | VERIZON PENNSYLVANIA, INC. | 9208 | PHPHSBZN28 | PA |
| — | 610-725 | 6XXX7XXX · 2 holders which blocks → | VERIZON PENNSYLVANIA, INC. | 9208 | PHPHSBZN28 | PA |
| — | 610-731 | 1XXX3XXX4XXX5XXX6XXX7XXX8XXX9XXX which blocks → | VERIZON PENNSYLVANIA, INC. | 9208 | PHPHSBZN30 | PA |
| — | 610-734 | not yet reported which blocks → | VERIZON PENNSYLVANIA, INC. | 9208 | PHPHSBZN17 | PA |
| — | 610-736 | not yet reported which blocks → | VERIZON PENNSYLVANIA, INC. | 9208 | READING | PA |
| — | 610-738 | 5XXX which blocks → | VERIZON PENNSYLVANIA, INC. | 9208 | W CHESTER | PA |
| — | 610-740 | 4XXX8XXX · 2 holders which blocks → | VERIZON PENNSYLVANIA, INC. | 9208 | ALLENTOWN | PA |
| — | 610-746 | 8XXX which blocks → | VERIZON PENNSYLVANIA, INC. | 9208 | NAZARETH | PA |
| — | 610-747 | 5XXX6XXX8XXX9XXX · 2 holders which blocks → | VERIZON PENNSYLVANIA, INC. | 9208 | PHPHSBZN23 | PA |
| — | 610-749 | 4XXX5XXX6XXX7XXX8XXX9XXX · 3 holders which blocks → | VERIZON PENNSYLVANIA, INC. | 9208 | RIEGELSVL | PA |
| — | 610-758 | not yet reported which blocks → | VERIZON PENNSYLVANIA, INC. | 9208 | BETHLEHEM | PA |
| — | 610-759 | not yet reported which blocks → | VERIZON PENNSYLVANIA, INC. | 9208 | NAZARETH | PA |
| — | 610-760 | 3XXX4XXX5XXX7XXX · 4 holders which blocks → | VERIZON PENNSYLVANIA, INC. | 9208 | SLATINGTON | PA |
| — | 610-767 | not yet reported which blocks → | VERIZON PENNSYLVANIA, INC. | 9208 | SLATINGTON | PA |
| — | 610-768 | not yet reported which blocks → | VERIZON PENNSYLVANIA, INC. | 9208 | PHPHSBZN30 | PA |
| — | 610-770 | 4XXX5XXX · 2 holders which blocks → | VERIZON PENNSYLVANIA, INC. | 9208 | ALLENTOWN | PA |
| — | 610-771 | 3XXX4XXX6XXX7XXX8XXX · 3 holders which blocks → | VERIZON PENNSYLVANIA, INC. | 9208 | PHPHSBZN23 | PA |
| — | 610-774 | 8XXX which blocks → | VERIZON PENNSYLVANIA, INC. | 9208 | ALLENTOWN | PA |
| — | 610-775 | not yet reported which blocks → | VERIZON PENNSYLVANIA, INC. | 9208 | READING | PA |
| — | 610-776 | 9XXX which blocks → | VERIZON PENNSYLVANIA, INC. | 9208 | ALLENTOWN | PA |
| — | 610-777 | not yet reported which blocks → | VERIZON PENNSYLVANIA, INC. | 9208 | READING | PA |
| — | 610-778 | 0XXX5XXX6XXX · 2 holders which blocks → | VERIZON PENNSYLVANIA, INC. | 9208 | ALLENTOWN | PA |
| — | 610-779 | not yet reported which blocks → | VERIZON PENNSYLVANIA, INC. | 9208 | READING | PA |
| — | 610-782 | 1XXX6XXX · 2 holders which blocks → | VERIZON PENNSYLVANIA, INC. | 9208 | ALLENTOWN | PA |
| — | 610-783 | 3XXX9XXX · 2 holders which blocks → | VERIZON PENNSYLVANIA, INC. | 9208 | PHPHSBZN29 | PA |
| — | 610-789 | not yet reported which blocks → | VERIZON PENNSYLVANIA, INC. | 9208 | PHPHSBZN21 | PA |
| — | 610-791 | 8XXX which blocks → | VERIZON PENNSYLVANIA, INC. | 9208 | ALLENTOWN | PA |
Source: NANPA CO Code Assignments (Utilized, All States, Public), file date 09/26/2026 — Tier A primary source, refreshed on every import. Viewing is free; bulk downloads require a membership.