NumberResearchRecent prefix assignments
334 prefixes assigned in the last 30 days · from the daily NANPA CO code file, 09/28/2026
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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| Assigned | NPA-NXX | Thousands-blocks taken (last-4 opening) | Code holder | OCN | Rate center | State |
|---|---|---|---|---|---|---|
| — | 610-751 | not yet reported which blocks → | NEW CINGULAR WIRELESS PCS, LLC - DC | 4036 | ALLENTOWN | PA |
| — | 610-753 | 0XXX1XXX2XXX3XXX4XXX5XXX7XXX8XXX9XXX · 3 holders which blocks → | ONVOY, LLC - PA | 547E | PHPHSBZN17 | PA |
| — | 610-754 | not yet reported which blocks → | WINDSTREAM CONESTOGA, INC. | 0162 | SASSAMNSVL | PA |
| — | 610-755 | 1XXX2XXX5XXX7XXX8XXX which blocks → | PAETEC ITEL, LLC | 829J | PHPHSBZN30 | PA |
| — | 610-756 | 0XXX1XXX2XXX5XXX7XXX8XXX9XXX · 4 holders which blocks → | VERIZON NORTH, INC. - PA (QUAKER ST) | 0201 | KEMPTON | PA |
| — | 610-757 | 0XXX2XXX5XXX7XXX8XXX9XXX · 4 holders which blocks → | LEVEL 3 COMMUNICATIONS, LLC - PA | 4007 | PHPHSBZN30 | 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 |
| — | 610-761 | not yet reported which blocks → | NEW CINGULAR WIRELESS PCS, LLC - DC | 4036 | PHPHSBZN30 | PA |
| — | 610-762 | not yet reported which blocks → | NEW CINGULAR WIRELESS PCS, LLC - DC | 4036 | ALLENTOWN | PA |
| — | 610-763 | not yet reported which blocks → | NEW CINGULAR WIRELESS PCS, LLC - DC | 4036 | READING | PA |
| — | 610-764 | 2XXX which blocks → | NEW CINGULAR WIRELESS PCS, LLC - DC | 4036 | PHPHSBZN30 | PA |
| — | 610-765 | 0XXX2XXX3XXX4XXX8XXX9XXX · 4 holders which blocks → | LEVEL 3 COMMUNICATIONS, LLC - PA | 4007 | KENNETT SQ | PA |
| — | 610-766 | 4XXX5XXX6XXX7XXX8XXX9XXX · 4 holders which blocks → | AT&T - LOCAL | 7421 | PHPHSBZN23 | 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 |
| — | 610-772 | 3XXX4XXX5XXX6XXX7XXX8XXX9XXX · 3 holders which blocks → | AT&T - LOCAL | 7421 | PHPHSBZN31 | 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 |
| — | 610-780 | 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 |
Source: NANPA CO Code Assignments (Utilized, All States, Public), file date 09/28/2026 — Tier A primary source, refreshed on every import. Viewing is free; bulk downloads require a membership.