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 610
New assignments by month
Sep 2026
Aug 2026
Jul 2026
Jun 2026
May 2026
Apr 2026
Mar 2026
Feb 2026
Jan 2026
Dec 2025
Nov 2025
Oct 2025
| Assigned | NPA-NXX | Thousands-blocks taken (last-4 opening) | Code holder | OCN | Rate center | State |
|---|---|---|---|---|---|---|
| — | 610-665 | 0XXX1XXX2XXX3XXX5XXX7XXX8XXX9XXX · 5 holders which blocks → | LEVEL 3 COMMUNICATIONS, LLC - PA | 4007 | PHPHSBZN29 | PA |
| — | 610-666 | not yet reported which blocks → | VERIZON PENNSYLVANIA, INC. | 9208 | PHPHSBZN29 | PA |
| — | 610-667 | not yet reported which blocks → | VERIZON PENNSYLVANIA, INC. | 9208 | PHPHSBZN23 | PA |
| — | 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 |
| — | 610-671 | 3XXX5XXX7XXX8XXX9XXX · 4 holders which blocks → | MCIMETRO ACCESS TRANSMISSION SERVICES LLC | 7229 | PHPHSBZN29 | PA |
| — | 610-672 | 2XXX3XXX4XXX6XXX7XXX8XXX · 2 holders which blocks → | MCIMETRO ACCESS TRANSMISSION SERVICES LLC | 7229 | PHPHSBZN25 | PA |
| — | 610-673 | 0XXX1XXX2XXX3XXX4XXX5XXX6XXX7XXX8XXX · 3 holders which blocks → | AT&T - LOCAL | 7421 | PHPHSBZN26 | PA |
| — | 610-675 | 3XXX4XXX5XXX6XXX7XXX8XXX9XXX · 2 holders which blocks → | MCIMETRO ACCESS TRANSMISSION SERVICES LLC | 7229 | PHPHSBZN10 | PA |
| — | 610-676 | 9XXX which blocks → | VERIZON PENNSYLVANIA, INC. | 9208 | PHPHSBZN29 | PA |
| — | 610-677 | 0XXX1XXX2XXX3XXX4XXX5XXX7XXX9XXX · 3 holders which blocks → | RCN TELECOM SERVICES OF PENNSYLVANIA, INC. | 7615 | PHPHSBZN23 | PA |
| — | 610-678 | not yet reported which blocks → | VERIZON PENNSYLVANIA, INC. | 9208 | READING | PA |
| — | 610-680 | 0XXX1XXX5XXX6XXX7XXX8XXX9XXX · 3 holders which blocks → | LEVEL 3 COMMUNICATIONS, LLC - PA | 4007 | PHPHSBZN30 | PA |
| — | 610-681 | not yet reported which blocks → | PALMERTON TEL. CO. | 0196 | KRESGEVL | PA |
| — | 610-682 | not yet reported which blocks → | WINDSTREAM CONESTOGA, INC. | 0162 | TOPTON | PA |
| — | 610-683 | 2XXX which blocks → | VERIZON PENNSYLVANIA, INC. | 9208 | KUTZTOWN | PA |
| — | 610-684 | 5XXX7XXX9XXX · 2 holders which blocks → | PAETEC ITEL, LLC | 829J | PHPHSBZN31 | PA |
| — | 610-685 | not yet reported which blocks → | CTSI, INC. - PA | 7513 | READING | PA |
| — | 610-686 | 0XXX1XXX2XXX3XXX4XXX6XXX7XXX8XXX9XXX · 6 holders which blocks → | AT&T - LOCAL | 7421 | CATASAUQUA | 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 |
| — | 610-689 | not yet reported which blocks → | WINDSTREAM CONESTOGA, INC. | 0162 | YELLOW HS | 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 |
| — | 610-693 | 0XXX2XXX4XXX7XXX · 4 holders which blocks → | VERIZON NORTH, INC. - PA | 0169 | ROBESONIA | 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 |
| — | 610-697 | 9XXX which blocks → | SERVICE ELECTRIC TELEPHONE COMPANY, LLC | 8320 | NORTHAMPTN | PA |
| — | 610-698 | not yet reported which blocks → | NEW CINGULAR WIRELESS PCS, LLC - DC | 4036 | READING | PA |
| — | 610-699 | 6XXX7XXX8XXX9XXX · 3 holders which blocks → | LEVEL 3 COMMUNICATIONS, LLC - PA | 4007 | PHPHSBZN28 | PA |
| — | 610-700 | not yet reported which blocks → | PA | |||
| — | 610-701 | 1XXX8XXX · 2 holders which blocks → | VERIZON PENNSYLVANIA, INC. | 9208 | W CHESTER | PA |
| — | 610-703 | not yet reported which blocks → | NEW CINGULAR WIRELESS PCS, LLC - DC | 4036 | ALLENTOWN | PA |
| — | 610-704 | not yet reported which blocks → | NEW CINGULAR WIRELESS PCS, LLC - DC | 4036 | ALLENTOWN | 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 |
| — | 610-707 | 0XXX1XXX2XXX3XXX4XXX6XXX7XXX8XXX · 6 holders which blocks → | MCIMETRO ACCESS TRANSMISSION SERVICES LLC - PA | 7434 | PHPHSBZN22 | PA |
| — | 610-708 | 0XXX1XXX2XXX3XXX4XXX5XXX6XXX · 5 holders which blocks → | MCIMETRO ACCESS TRANSMISSION SERVICES LLC - PA | 7434 | MENDENHALL | PA |
| — | 610-709 | 3XXX4XXX5XXX6XXX7XXX9XXX · 3 holders which blocks → | VERIZON PENNSYLVANIA, INC. | 9208 | ALLENTOWN | PA |
| — | 610-711 | not yet reported which blocks → | MULTIPLE OCN LISTING | MULT | XXXXXXXXXX | 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 |
| — | 610-715 | not yet reported which blocks → | CELLCO PARTNERSHIP DBA VERIZON WIRELESS - PA | 6392 | PHPHSBZN30 | PA |
| — | 610-716 | not yet reported which blocks → | CELLCO PARTNERSHIP DBA VERIZON WIRELESS - PA | 6392 | PHPHSBZN30 | PA |
| — | 610-717 | 2XXX6XXX7XXX8XXX9XXX which blocks → | LEVEL 3 COMMUNICATIONS, LLC - PA | 4007 | PHPHSBZN10 | 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 |
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.