NumberResearchRecent prefix assignments
355 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.
Most active assignees, last 30 days
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Oct 2025
| Assigned | NPA-NXX | Thousands-blocks taken (last-4 opening) | Code holder | OCN | Rate center | State |
|---|---|---|---|---|---|---|
| — | 724-576 | 0–9 XXXall 10 · 7 holders which blocks → | LEVEL 3 COMMUNICATIONS, LLC - PA | 4007 | MIDLAND | PA |
| — | 724-577 | 0XXX1XXX2XXX3XXX4XXX5XXX7XXX8XXX · 3 holders which blocks → | TELEPORT COMMUNICATIONS AMERICA, LLC - PA | 7315 | PT MARION | PA |
| — | 724-579 | 0XXX2XXX3XXX4XXX5XXX6XXX7XXX8XXX9XXX · 2 holders which blocks → | FIDIUM ENTERPRISE SERVICES, LLC | 8597 | WASHINGTON | PA |
| — | 724-580 | 0XXX1XXX2XXX3XXX4XXX5XXX6XXX7XXX8XXX · 7 holders which blocks → | TELEPORT COMMUNICATIONS AMERICA, LLC - PA | 7315 | REPUBLIC | PA |
| — | 724-582 | 2XXX3XXX5XXX6XXX7XXX8XXX9XXX · 2 holders which blocks → | MCIMETRO ACCESS TRANSMISSION SERVICES LLC | 7229 | GLENWILLRD | PA |
| — | 724-583 | 4XXX5XXX6XXX · 2 holders which blocks → | VERIZON PENNSYLVANIA, INC. | 9208 | MASONTOWN | PA |
| — | 724-584 | 4XXX5XXX7XXX8XXX9XXX · 2 holders which blocks → | NEW CINGULAR WIRELESS PCS, LLC - IL | 6534 | CRIDERSCOR | PA |
| — | 724-586 | 1XXX3XXX4XXX8XXX · 4 holders which blocks → | BRIGHTSPEED OF PENNSYLVANIA, LLC | 0209 | NIXON | PA |
| — | 724-587 | 1XXX2XXX4XXX6XXX7XXX8XXX · 5 holders which blocks → | VERIZON PENNSYLVANIA, INC. | 9208 | AVELLA | PA |
| — | 724-588 | not yet reported which blocks → | VERIZON PENNSYLVANIA, INC. | 9208 | GREENVILLE | PA |
| — | 724-589 | 7XXX9XXX · 2 holders which blocks → | VERIZON PENNSYLVANIA, INC. | 9208 | GREENVILLE | PA |
| — | 724-592 | none assigned yet which blocks → | WINDSTREAM PENNSYLVANIA, INC. | 0176 | RICES LDG | PA |
| — | 724-593 | not yet reported which blocks → | LAUREL HIGHLAND TEL. CO. | 0179 | STAHLSTOWN | PA |
| — | 724-594 | 0XXX2XXX3XXX4XXX5XXX6XXX7XXX8XXX9XXX · 5 holders which blocks → | FIDIUM ENTERPRISE SERVICES, LLC | 8597 | NEWKNSNGTN | PA |
| — | 724-595 | 0–9 XXXall 10 · 4 holders which blocks → | CORE COMMUNICATIONS, INC. - PA | 3806 | AMBRIDGE | PA |
| — | 724-598 | 5XXX9XXX · 2 holders which blocks → | VERIZON PENNSYLVANIA, INC. | 9208 | NEW CASTLE | PA |
| — | 724-599 | 0XXX2XXX3XXX4XXX5XXX6XXX7XXX8XXX9XXX · 2 holders which blocks → | LEVEL 3 COMMUNICATIONS, LLC - PA | 4007 | INDIANA | PA |
| — | 724-600 | 4XXX5XXX6XXX9XXX which blocks → | VERIZON PENNSYLVANIA, INC. | 9208 | GREENSBURG | PA |
| — | 724-601 | not yet reported which blocks → | CELLCO PARTNERSHIP DBA VERIZON WIRELESS - PA | 6392 | ROCHESTER | PA |
| — | 724-603 | 0XXX1XXX2XXX3XXX5XXX6XXX8XXX9XXX · 7 holders which blocks → | TELEPORT COMMUNICATIONS AMERICA, LLC - PA | 7315 | CONNELLSVL | PA |
| — | 724-604 | 1XXX3XXX4XXX5XXX6XXX7XXX8XXX9XXX · 4 holders which blocks → | PAETEC ITEL, LLC | 829J | TARENTUM | PA |
| — | 724-608 | 0XXX3XXX4XXX · 2 holders which blocks → | FIDIUM ENTERPRISE SERVICES, LLC | 383J | PARKER | PA |
| — | 724-609 | 0XXX1XXX3XXX5XXX8XXX9XXX · 5 holders which blocks → | TELEPORT COMMUNICATIONS AMERICA, LLC - PA | 7315 | ZELIENOPLE | PA |
| — | 724-611 | not yet reported which blocks → | MULTIPLE OCN LISTING | MULT | XXXXXXXXXX | PA |
| — | 724-612 | none assigned yet which blocks → | AERIAL COMMUNICATIONS, INC. | 6701 | GIBSONIA | PA |
| — | 724-614 | 0XXX2XXX3XXX4XXX5XXX6XXX7XXX8XXX9XXX · 3 holders which blocks → | FIDIUM ENTERPRISE SERVICES, LLC | 8597 | NEW CASTLE | PA |
| — | 724-615 | 0XXX3XXX8XXX9XXX · 4 holders which blocks → | LEVEL 3 COMMUNICATIONS, LLC - PA | 4007 | GROVE CITY | PA |
| — | 724-618 | 0XXX1XXX2XXX3XXX4XXX5XXX6XXX7XXX8XXX · 5 holders which blocks → | TELEPORT COMMUNICATIONS AMERICA, LLC - PA | 7315 | DAWSON | PA |
| — | 724-619 | 0XXX1XXX2XXX6XXX · 3 holders which blocks → | TELEPORT COMMUNICATIONS AMERICA, LLC - PA | 7315 | SCOTTDALE | PA |
| — | 724-620 | 1XXX3XXX4XXX5XXX6XXX7XXX8XXX · 4 holders which blocks → | VERIZON PENNSYLVANIA, INC. | 9208 | CONNELLSVL | PA |
| — | 724-622 | not yet reported which blocks → | CELLCO PARTNERSHIP DBA VERIZON WIRELESS - PA | 6392 | ROCHESTER | PA |
| — | 724-623 | 2XXX3XXX4XXX5XXX6XXX7XXX8XXX9XXX · 4 holders which blocks → | PAETEC ITEL, LLC | 829J | GLENWILLRD | PA |
| — | 724-624 | 2XXX3XXX5XXX7XXX8XXX9XXX · 3 holders which blocks → | AERIAL COMMUNICATIONS, INC. | 6701 | BEAVER FLS | PA |
| — | 724-625 | not yet reported which blocks → | CONSOLIDATED COMMUNICATIONS OF PENNSYLVANIA CO | 0193 | MARS | PA |
| — | 724-626 | 7XXX9XXX · 2 holders which blocks → | VERIZON PENNSYLVANIA, INC. | 9208 | CONNELLSVL | PA |
| — | 724-627 | not yet reported which blocks → | WINDSTREAM PENNSYLVANIA, INC. | 0176 | WAYNESBURG | PA |
| — | 724-628 | not yet reported which blocks → | VERIZON PENNSYLVANIA, INC. | 9208 | CONNELLSVL | PA |
| — | 724-631 | 2XXX4XXX5XXX6XXX7XXX8XXX · 4 holders which blocks → | FIDIUM ENTERPRISE SERVICES, LLC | 8597 | ZELIENOPLE | PA |
| — | 724-632 | 1XXX4XXX7XXX8XXX · 4 holders which blocks → | WINDSTREAM PENNSYLVANIA, INC. | 0176 | RICHEYVL | PA |
| — | 724-633 | 1XXX2XXX3XXX5XXX6XXX7XXX8XXX9XXX · 7 holders which blocks → | TELEPORT COMMUNICATIONS AMERICA, LLC - PA | 7315 | WESTNEWTON | PA |
| — | 724-634 | 0XXX1XXX2XXX4XXX5XXX6XXX7XXX8XXX9XXX · 7 holders which blocks → | TELEPORT COMMUNICATIONS AMERICA, LLC - PA | 7315 | WMIDDLESEX | PA |
| — | 724-635 | 2XXX3XXX4XXX5XXX6XXX7XXX8XXX9XXX · 6 holders which blocks → | TELEPORT COMMUNICATIONS AMERICA, LLC - PA | 7315 | YOUNGWOOD | PA |
| — | 724-637 | 1XXX4XXX5XXX6XXX7XXX8XXX · 5 holders which blocks → | BRIGHTSPEED OF PENNSYLVANIA, LLC | 0209 | W SUNBURY | PA |
| — | 724-639 | 2XXX4XXX5XXX6XXX7XXX · 4 holders which blocks → | VERIZON NORTH, INC. - PA | 0169 | SALTSBURG | PA |
| — | 724-640 | 1XXX3XXX8XXX9XXX · 2 holders which blocks → | AERIAL COMMUNICATIONS, INC. | 6701 | GREENSBURG | PA |
| — | 724-642 | 1XXX2XXX3XXX5XXX6XXX7XXX8XXX9XXX · 6 holders which blocks → | ONVOY, LLC - PA | 547E | DAWSON | PA |
| — | 724-643 | 3XXX7XXX · 2 holders which blocks → | VERIZON PENNSYLVANIA, INC. | 9208 | MIDLAND | PA |
| — | 724-644 | 0XXX1XXX2XXX3XXX5XXX7XXX8XXX · 5 holders which blocks → | ONVOY, LLC - PA | 547E | AVELLA | PA |
| — | 724-645 | 0XXX3XXX4XXX5XXX6XXX7XXX8XXX · 3 holders which blocks → | ONVOY, LLC - PA | 547E | PERRYOPOLS | PA |
| — | 724-646 | not yet reported which blocks → | PYMATUNING INDEPENDENT TEL. CO. | 0200 | TRANSFER | PA |
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.