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
New assignments by month
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| Assigned | NPA-NXX | Thousands-blocks taken (last-4 opening) | Code holder | OCN | Rate center | State |
|---|---|---|---|---|---|---|
| — | 610-369 | not yet reported which blocks → | WINDSTREAM CONESTOGA, INC. | 0162 | BOYERTOWN | PA |
| — | 610-370 | 6XXX7XXX8XXX · 3 holders which blocks → | VERIZON PENNSYLVANIA, INC. | 9208 | READING | PA |
| — | 610-371 | 2XXX which blocks → | VERIZON PENNSYLVANIA, INC. | 9208 | READING | PA |
| — | 610-372 | not yet reported which blocks → | VERIZON PENNSYLVANIA, INC. | 9208 | READING | PA |
| — | 610-373 | not yet reported which blocks → | VERIZON PENNSYLVANIA, INC. | 9208 | READING | PA |
| — | 610-374 | not yet reported which blocks → | VERIZON PENNSYLVANIA, INC. | 9208 | READING | PA |
| — | 610-375 | not yet reported which blocks → | VERIZON PENNSYLVANIA, INC. | 9208 | READING | PA |
| — | 610-376 | not yet reported which blocks → | VERIZON PENNSYLVANIA, INC. | 9208 | READING | PA |
| — | 610-377 | not yet reported which blocks → | VERIZON PENNSYLVANIA, INC. | 9208 | LEHIGHTON | PA |
| — | 610-378 | not yet reported which blocks → | VERIZON PENNSYLVANIA, INC. | 9208 | READING | PA |
| — | 610-379 | 1XXX2XXX3XXX4XXX5XXX6XXX7XXX8XXX9XXX · 7 holders which blocks → | VERIZON PENNSYLVANIA, INC. | 9208 | LEHIGHTON | PA |
| — | 610-380 | not yet reported which blocks → | VERIZON PENNSYLVANIA, INC. | 9208 | COATESVL | PA |
| — | 610-381 | not yet reported which blocks → | PALMERTON TEL. CO. | 0196 | KUNKLETOWN | PA |
| — | 610-382 | 5XXX which blocks → | TELEPORT COMMUNICATIONS AMERICA, LLC - PA | 7309 | PHPHSBZN30 | PA |
| — | 610-383 | not yet reported which blocks → | VERIZON PENNSYLVANIA, INC. | 9208 | COATESVL | PA |
| — | 610-384 | not yet reported which blocks → | VERIZON PENNSYLVANIA, INC. | 9208 | COATESVL | PA |
| — | 610-385 | not yet reported which blocks → | WINDSTREAM CONESTOGA, INC. | 0162 | DOUGLASSVL | PA |
| — | 610-386 | 9XXX which blocks → | TELEPORT COMMUNICATIONS AMERICA, LLC - PA | 7309 | PHPHSBZN26 | PA |
| — | 610-387 | 0XXX1XXX5XXX6XXX7XXX8XXX9XXX · 4 holders which blocks → | TELEPORT COMMUNICATIONS AMERICA, LLC - PA | 7309 | PHPHSBZN10 | PA |
| — | 610-388 | not yet reported which blocks → | VERIZON PENNSYLVANIA, INC. | 9208 | MENDENHALL | PA |
| — | 610-389 | not yet reported which blocks → | CELLCO PARTNERSHIP DBA VERIZON WIRELESS - PA | 6392 | PHPHSBZN30 | PA |
| — | 610-390 | not yet reported which blocks → | NEW CINGULAR WIRELESS PCS, LLC - DC | 4036 | ALLENTOWN | PA |
| — | 610-391 | 5XXX6XXX · 2 holders which blocks → | VERIZON PENNSYLVANIA, INC. | 9208 | ALLENTOWN | PA |
| — | 610-392 | not yet reported which blocks → | NEW CINGULAR WIRELESS PCS, LLC - DC | 4036 | ALLENTOWN | PA |
| — | 610-393 | not yet reported which blocks → | NEW CINGULAR WIRELESS PCS, LLC - DC | 4036 | ALLENTOWN | PA |
| — | 610-394 | 5XXX8XXX · 2 holders which blocks → | VERIZON PENNSYLVANIA, INC. | 9208 | PHPHSBZN17 | PA |
| — | 610-395 | not yet reported which blocks → | VERIZON PENNSYLVANIA, INC. | 9208 | ALLENTOWN | PA |
| — | 610-396 | 2XXX5XXX7XXX · 2 holders which blocks → | VERIZON PENNSYLVANIA, INC. | 9208 | READING | PA |
| — | 610-397 | 9XXX which blocks → | VERIZON PENNSYLVANIA, INC. | 9208 | PHPHSBZN31 | PA |
| — | 610-398 | not yet reported which blocks → | VERIZON PENNSYLVANIA, INC. | 9208 | ALLENTOWN | PA |
| — | 610-399 | not yet reported which blocks → | VERIZON PENNSYLVANIA, INC. | 9208 | WESTTOWN | PA |
| — | 610-401 | 0XXX1XXX3XXX4XXX5XXX6XXX7XXX8XXX · 3 holders which blocks → | TELEPORT COMMUNICATIONS AMERICA, LLC - PA | 7315 | READING | PA |
| — | 610-402 | not yet reported which blocks → | CTSI, INC. - PA | 7513 | ALLENTOWN | PA |
| — | 610-403 | 9XXX which blocks → | SERVICE ELECTRIC TELEPHONE COMPANY, LLC | 8320 | CATASAUQUA | PA |
| — | 610-404 | not yet reported which blocks → | WINDSTREAM CONESTOGA, INC. | 0162 | BIRDSBORO | PA |
| — | 610-405 | not yet reported which blocks → | NEW CINGULAR WIRELESS PCS, LLC - DC | 4036 | PHPHSBZN30 | PA |
| — | 610-406 | 1XXX2XXX3XXX4XXX5XXX6XXX7XXX8XXX · 4 holders which blocks → | VERIZON PENNSYLVANIA, INC. | 9208 | READING | PA |
| — | 610-407 | not yet reported which blocks → | VERIZON PENNSYLVANIA, INC. | 9208 | PHPHSBZN28 | PA |
| — | 610-408 | 5XXX which blocks → | VERIZON PENNSYLVANIA, INC. | 9208 | PHPHSBZN28 | PA |
| — | 610-409 | 4XXX which blocks → | VERIZON PENNSYLVANIA, INC. | 9208 | COLLEGEVL | PA |
| — | 610-410 | 0XXX1XXX2XXX3XXX4XXX5XXX9XXX · 4 holders which blocks → | LEVEL 3 COMMUNICATIONS, LLC - PA | 4007 | CENTER PT | PA |
| — | 610-411 | not yet reported which blocks → | MULTIPLE OCN LISTING | MULT | XXXXXXXXXX | PA |
| — | 610-413 | not yet reported which blocks → | NEW CINGULAR WIRELESS PCS, LLC - DC | 4036 | READING | PA |
| — | 610-414 | not yet reported which blocks → | SPOK, INC. | 6630 | POTTSTOWN | PA |
| — | 610-415 | 4XXX5XXX7XXX8XXX · 4 holders which blocks → | VERIZON PENNSYLVANIA, INC. | 9208 | PHOENIXVL | PA |
| — | 610-416 | not yet reported which blocks → | NEW CINGULAR WIRELESS PCS, LLC - DC | 4036 | PHPHSBZN30 | PA |
| — | 610-417 | not yet reported which blocks → | CELLCO PARTNERSHIP DBA VERIZON WIRELESS - PA | 6392 | BETHLEHEM | PA |
| — | 610-418 | not yet reported which blocks → | SPOK, INC. | 6630 | W CHESTER | PA |
| — | 610-419 | 5XXX7XXX which blocks → | RCN TELECOM SERVICES OF PENNSYLVANIA, INC. | 7615 | BETHLEHEM | PA |
| — | 610-420 | not yet reported which blocks → | CELLCO PARTNERSHIP DBA VERIZON WIRELESS - PA | 6392 | 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.