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
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| Assigned | NPA-NXX | Thousands-blocks taken (last-4 opening) | Code holder | OCN | Rate center | State |
|---|---|---|---|---|---|---|
| — | 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 |
| — | 610-780 | not yet reported which blocks → | NEW CINGULAR WIRELESS PCS, LLC - DC | 4036 | READING | PA |
| — | 610-781 | not yet reported which blocks → | NEW CINGULAR WIRELESS PCS, LLC - DC | 4036 | 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 |
| — | 610-784 | 1XXX7XXX9XXX which blocks → | PAETEC ITEL, LLC | 829J | PHPHSBZN23 | PA |
| — | 610-785 | 0XXX2XXX3XXX4XXX5XXX7XXX8XXX9XXX · 2 holders which blocks → | LEVEL 3 COMMUNICATIONS, LLC - PA | 4007 | PHPHSBZN23 | PA |
| — | 610-786 | 6XXX7XXX · 2 holders which blocks → | PAETEC ITEL, LLC | 829J | PHPHSBZN28 | PA |
| — | 610-787 | 0XXX1XXX2XXX3XXX4XXX5XXX7XXX9XXX · 2 holders which blocks → | RCN TELECOM SERVICES OF PENNSYLVANIA, INC. | 7615 | PHPHSBZN30 | PA |
| — | 610-788 | 0XXX1XXX3XXX4XXX5XXX6XXX8XXX9XXX · 3 holders which blocks → | LEVEL 3 COMMUNICATIONS, LLC - PA | 4007 | PHPHSBZN26 | PA |
| — | 610-789 | not yet reported which blocks → | VERIZON PENNSYLVANIA, INC. | 9208 | PHPHSBZN21 | PA |
| — | 610-790 | 3XXX4XXX5XXX7XXX9XXX · 2 holders which blocks → | PAETEC ITEL, LLC | 829J | READING | PA |
| — | 610-791 | 8XXX which blocks → | VERIZON PENNSYLVANIA, INC. | 9208 | ALLENTOWN | PA |
| — | 610-792 | 6XXX which blocks → | VERIZON PENNSYLVANIA, INC. | 9208 | ROYERSFORD | PA |
| — | 610-793 | not yet reported which blocks → | VERIZON PENNSYLVANIA, INC. | 9208 | LENAPE | PA |
| — | 610-794 | not yet reported which blocks → | IRONTON TEL. CO. | 0175 | ALLENTOWN | PA |
| — | 610-795 | 0XXX1XXX2XXX3XXX4XXX5XXX8XXX9XXX · 4 holders which blocks → | LEVEL 3 COMMUNICATIONS, LLC - PA | 4007 | PHPHSBZN24 | PA |
| — | 610-796 | not yet reported which blocks → | VERIZON PENNSYLVANIA, INC. | 9208 | READING | PA |
| — | 610-797 | not yet reported which blocks → | VERIZON PENNSYLVANIA, INC. | 9208 | ALLENTOWN | PA |
| — | 610-798 | 1XXX3XXX5XXX6XXX which blocks → | VERIZON PENNSYLVANIA, INC. | 9208 | ALLENTOWN | PA |
| — | 610-799 | not yet reported which blocks → | IRONTON TEL. CO. | 0175 | IRONTON | PA |
| — | 610-801 | 1XXX4XXX5XXX6XXX7XXX8XXX9XXX · 3 holders which blocks → | LEVEL 3 COMMUNICATIONS, LLC - PA | 4007 | PHPHSBZN25 | PA |
| — | 610-802 | 4XXX6XXX8XXX9XXX which blocks → | OMNIPOINT COMMUNICATIONS ENTERPRISES, LP | 6626 | BIRDSBORO | PA |
| — | 610-803 | 0–9 XXXall 10 · 3 holders which blocks → | METROPCS, INC. | 5562 | PHPHSBZN17 | PA |
| — | 610-804 | not yet reported which blocks → | NEW CINGULAR WIRELESS PCS, LLC - DC | 4036 | PHPHSBZN30 | PA |
| — | 610-805 | 2XXX which blocks → | OMNIPOINT COMMUNICATIONS ENTERPRISES, LP | 6626 | CENTER PT | PA |
| — | 610-806 | 0XXX2XXX3XXX4XXX5XXX6XXX7XXX8XXX · 4 holders which blocks → | TELEPORT COMMUNICATIONS AMERICA, LLC - PA | 7309 | WEST GROVE | PA |
| — | 610-807 | not yet reported which blocks → | VERIZON PENNSYLVANIA, INC. | 9208 | BETHLEHEM | PA |
| — | 610-808 | 0XXX1XXX2XXX3XXX4XXX5XXX6XXX7XXX8XXX · 4 holders which blocks → | MCIMETRO ACCESS TRANSMISSION SERVICES LLC - PA | 7434 | PHPHSBZN10 | PA |
| — | 610-811 | not yet reported which blocks → | MULTIPLE OCN LISTING | MULT | XXXXXXXXXX | PA |
| — | 610-812 | not yet reported which blocks → | NEW CINGULAR WIRELESS PCS, LLC - DC | 4036 | PHPHSBZN30 | PA |
| — | 610-813 | 0XXX1XXX2XXX3XXX5XXX6XXX7XXX8XXX9XXX · 6 holders which blocks → | MCIMETRO ACCESS TRANSMISSION SERVICES LLC | 7229 | NAZARETH | PA |
| — | 610-814 | 7XXX which blocks → | VERIZON PENNSYLVANIA, INC. | 9208 | BETHLEHEM | PA |
| — | 610-815 | not yet reported which blocks → | SPOK, INC. | 6630 | COLLEGEVL | PA |
| — | 610-818 | 0XXX2XXX3XXX5XXX6XXX7XXX8XXX9XXX · 3 holders which blocks → | LEVEL 3 COMMUNICATIONS, LLC - PA | 4007 | PHPHSBZN31 | PA |
| — | 610-819 | 2XXX3XXX4XXX5XXX7XXX8XXX · 3 holders which blocks → | MCIMETRO ACCESS TRANSMISSION SERVICES LLC | 7229 | POTTSTOWN | PA |
| — | 610-820 | 1XXX which blocks → | VERIZON PENNSYLVANIA, INC. | 9208 | ALLENTOWN | PA |
| — | 610-821 | not yet reported which blocks → | VERIZON PENNSYLVANIA, INC. | 9208 | ALLENTOWN | PA |
| — | 610-822 | 2XXX3XXX4XXX5XXX6XXX7XXX8XXX9XXX · 3 holders which blocks → | MCIMETRO ACCESS TRANSMISSION SERVICES LLC | 7229 | PHPHSBZN23 | PA |
| — | 610-823 | not yet reported which blocks → | NEW CINGULAR WIRELESS PCS, LLC - DC | 4036 | READING | PA |
| — | 610-824 | not yet reported which blocks → | PALMERTON TEL. CO. | 0196 | PALMERTON | PA |
| — | 610-825 | not yet reported which blocks → | VERIZON PENNSYLVANIA, INC. | 9208 | PHPHSBZN31 | PA |
| — | 610-826 | not yet reported which blocks → | PALMERTON TEL. CO. | 0196 | PALMERTON | PA |
| — | 610-827 | 0XXX3XXX4XXX5XXX6XXX8XXX · 5 holders which blocks → | VERIZON PENNSYLVANIA, INC. | 9208 | CHESTERSPG | PA |
| — | 610-828 | not yet reported which blocks → | VERIZON PENNSYLVANIA, INC. | 9208 | PHPHSBZN31 | PA |
| — | 610-829 | 9XXX which blocks → | SERVICE ELECTRIC TELEPHONE COMPANY, LLC | 8320 | EASTON | PA |
| — | 610-830 | not yet reported which blocks → | SPOK, INC. | 6630 | ALLENTOWN | PA |
| — | 610-831 | 3XXX4XXX6XXX7XXX · 2 holders which blocks → | VERIZON PENNSYLVANIA, INC. | 9208 | COLLEGEVL | 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.