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.
Most active assignees, all time — NPA 717
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| Assigned | NPA-NXX | Thousands-blocks taken (last-4 opening) | Code holder | OCN | Rate center | State |
|---|---|---|---|---|---|---|
| — | 717-535 | 1XXX2XXX3XXX6XXX7XXX8XXX9XXX · 4 holders which blocks → | BRIGHTSPEED OF PENNSYLVANIA, LLC | 0209 | THOMPSONTN | PA |
| — | 717-536 | 1XXX4XXX5XXX6XXX7XXX8XXX · 5 holders which blocks → | BRIGHTSPEED OF PENNSYLVANIA, LLC | 0209 | BLAIN | PA |
| — | 717-537 | 0XXX1XXX2XXX3XXX5XXX6XXX7XXX8XXX9XXX · 5 holders which blocks → | WINDSTREAM D & E SYSTEMS, INC. - PA | 4114 | LANDISVL | PA |
| — | 717-538 | not yet reported which blocks → | D&E/OMNIPOINT WIREL JOINT VENT LP DBA PCS ONE | 6846 | LANCASTER | PA |
| — | 717-540 | not yet reported which blocks → | VERIZON PENNSYLVANIA, INC. | 9208 | HARISBGZN1 | PA |
| — | 717-541 | not yet reported which blocks → | VERIZON PENNSYLVANIA, INC. | 9208 | HARISBGZN1 | PA |
| — | 717-542 | none assigned yet which blocks → | METROPCS, INC. | 5562 | YORK | PA |
| — | 717-543 | 0XXX1XXX2XXX3XXX4XXX7XXX8XXX9XXX · 4 holders which blocks → | VERIZON PENNSYLVANIA, INC. | 9208 | LEWISTOWN | PA |
| — | 717-545 | not yet reported which blocks → | VERIZON PENNSYLVANIA, INC. | 9208 | HARISBGZN1 | PA |
| — | 717-546 | 1XXX2XXX3XXX4XXX5XXX6XXX7XXX8XXX9XXX · 7 holders which blocks → | PAETEC ITEL, LLC | 829J | MIDDLETOWN | PA |
| — | 717-548 | not yet reported which blocks → | COMMONWEALTH TELEPHONE COMPANY LLC | 0161 | HENSEL | PA |
| — | 717-554 | none assigned yet which blocks → | METROPCS, INC. | 5562 | HARISBGZN1 | PA |
| — | 717-555 | not yet reported which blocks → | MULTIPLE OCN LISTING | MULT | DIR ASST | PA |
| — | 717-556 | 5XXX6XXX8XXX · 3 holders which blocks → | FRONTIER COMMUNICATIONS OF PENNSYLVANIA, LLC | 0168 | LEOLA | PA |
| — | 717-558 | not yet reported which blocks → | VERIZON PENNSYLVANIA, INC. | 9208 | HARISBGZN1 | PA |
| — | 717-560 | not yet reported which blocks → | VERIZON PENNSYLVANIA, INC. | 9208 | LANCASTER | PA |
| — | 717-561 | not yet reported which blocks → | VERIZON PENNSYLVANIA, INC. | 9208 | HARISBGZN1 | PA |
| — | 717-564 | not yet reported which blocks → | VERIZON PENNSYLVANIA, INC. | 9208 | HARISBGZN1 | PA |
| — | 717-565 | 0XXX9XXX which blocks → | VERIZON PENNSYLVANIA, INC. | 9208 | HARISBGZN1 | PA |
| — | 717-566 | not yet reported which blocks → | VERIZON PENNSYLVANIA, INC. | 9208 | HUMMELSTN | PA |
| — | 717-567 | 1XXX4XXX5XXX8XXX · 3 holders which blocks → | BRIGHTSPEED OF PENNSYLVANIA, LLC | 0209 | NEWPORT | PA |
| — | 717-569 | not yet reported which blocks → | VERIZON PENNSYLVANIA, INC. | 9208 | LANCASTER | PA |
| — | 717-570 | not yet reported which blocks → | PA | |||
| — | 717-571 | not yet reported which blocks → | NEW CINGULAR WIRELESS PCS, LLC - DC | 4036 | HARISBGZN1 | PA |
| — | 717-572 | not yet reported which blocks → | CELLCO PARTNERSHIP DBA VERIZON WIRELESS - PA | 6392 | LANCASTER | PA |
| — | 717-573 | 0XXX1XXX3XXX6XXX7XXX8XXX · 2 holders which blocks → | FRONTIER COMMUNICATIONS OF BREEZEWOOD, LLC | 0149 | NEEDMORE | PA |
| — | 717-574 | not yet reported which blocks → | CELLCO PARTNERSHIP DBA VERIZON WIRELESS - PA | 6392 | HARISBGZN1 | PA |
| — | 717-575 | not yet reported which blocks → | CELLCO PARTNERSHIP DBA VERIZON WIRELESS - PA | 6392 | LANCASTER | PA |
| — | 717-576 | not yet reported which blocks → | CELLCO PARTNERSHIP DBA VERIZON WIRELESS - PA | 6392 | HARISBGZN1 | PA |
| — | 717-577 | none assigned yet which blocks → | METROPCS, INC. | 5562 | YORK | PA |
| — | 717-578 | not yet reported which blocks → | NEW CINGULAR WIRELESS PCS, LLC - DC | 4036 | YORK | PA |
| — | 717-579 | not yet reported which blocks → | NEW CINGULAR WIRELESS PCS, LLC - DC | 4036 | HARISBGZN1 | PA |
| — | 717-580 | not yet reported which blocks → | CELLCO PARTNERSHIP DBA VERIZON WIRELESS - PA | 6392 | HARISBGZN1 | PA |
| — | 717-581 | 2XXX which blocks → | VERIZON PENNSYLVANIA, INC. | 9208 | LANCASTER | PA |
| — | 717-582 | 1XXX6XXX which blocks → | BRIGHTSPEED OF PENNSYLVANIA, LLC | 0209 | NEWBLOMFLD | PA |
| — | 717-583 | 3XXX5XXX6XXX7XXX8XXX9XXX · 4 holders which blocks → | VERIZON PENNSYLVANIA, INC. | 9208 | HUMMELSTN | PA |
| — | 717-584 | 1XXX2XXX3XXX4XXX5XXX6XXX7XXX8XXX9XXX · 4 holders which blocks → | PAETEC ITEL, LLC | 829J | MILLERSVL | PA |
| — | 717-586 | not yet reported which blocks → | NEW CINGULAR WIRELESS PCS, LLC - DC | 4036 | YORK | PA |
| — | 717-588 | 0XXX1XXX2XXX4XXX5XXX6XXX7XXX8XXX9XXX · 7 holders which blocks → | LEVEL 3 COMMUNICATIONS, LLC - PA | 4007 | AKRON | PA |
| — | 717-589 | 1XXX2XXX4XXX5XXX8XXX9XXX · 4 holders which blocks → | BRIGHTSPEED OF PENNSYLVANIA, LLC | 0209 | MILLERSTN | PA |
| — | 717-591 | 6XXX which blocks → | CTSI, INC. - PA | 7513 | MECHANCSBG | PA |
| — | 717-592 | 0XXX1XXX8XXX9XXX · 2 holders which blocks → | VERIZON PENNSYLVANIA, INC. | 9208 | HARISBGZN1 | PA |
| — | 717-593 | 7XXX8XXX · 2 holders which blocks → | BRIGHTSPEED OF PENNSYLVANIA, LLC | 0209 | GREENCASTL | PA |
| — | 717-596 | 0XXX1XXX2XXX3XXX4XXX5XXX6XXX7XXX8XXX · 4 holders which blocks → | CENTURYLINK COMMUNICATIONS, LLC | 508J | DUNCANNON | PA |
| — | 717-597 | not yet reported which blocks → | BRIGHTSPEED OF PENNSYLVANIA, LLC | 0209 | GREENCASTL | PA |
| — | 717-599 | 0XXX1XXX2XXX4XXX6XXX8XXX9XXX which blocks → | VERIZON PENNSYLVANIA, INC. | 9208 | HARISBGZN1 | PA |
| — | 717-600 | 3XXX4XXX5XXX6XXX7XXX9XXX · 2 holders which blocks → | VERIZON NORTH, INC. - PA | 0169 | YORK | PA |
| — | 717-602 | 0–9 XXXall 10 · 2 holders which blocks → | NEW CINGULAR WIRELESS PCS, LLC - DC | 4036 | HARISBGZN1 | PA |
| — | 717-605 | 0XXX which blocks → | VERIZON PENNSYLVANIA, INC. | 9208 | MECHANCSBG | PA |
| — | 717-606 | 0XXX2XXX3XXX4XXX5XXX6XXX7XXX8XXX9XXX · 4 holders which blocks → | LEVEL 3 COMMUNICATIONS, LLC - PA | 4007 | LANCASTER | 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.