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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Oct 2025
| Assigned | NPA-NXX | Thousands-blocks taken (last-4 opening) | Code holder | OCN | Rate center | State |
|---|---|---|---|---|---|---|
| — | 610-318 | not yet reported which blocks → | SPOK, INC. | 6630 | PHPHSBZN12 | PA |
| — | 610-319 | not yet reported which blocks → | SPOK, INC. | 6630 | PHPHSBZN13 | PA |
| — | 610-320 | 2XXX which blocks → | VERIZON PENNSYLVANIA, INC. | 9208 | READING | PA |
| — | 610-321 | 3XXX4XXX5XXX7XXX8XXX · 3 holders which blocks → | VERIZON PENNSYLVANIA, INC. | 9208 | EAGLE | PA |
| — | 610-322 | not yet reported which blocks → | NEW CINGULAR WIRELESS PCS, LLC - DC | 4036 | PHPHSBZN30 | PA |
| — | 610-323 | not yet reported which blocks → | VERIZON PENNSYLVANIA, INC. | 9208 | POTTSTOWN | PA |
| — | 610-324 | not yet reported which blocks → | NEW CINGULAR WIRELESS PCS, LLC - DC | 4036 | PHPHSBZN30 | PA |
| — | 610-325 | not yet reported which blocks → | VERIZON PENNSYLVANIA, INC. | 9208 | PHPHSBZN22 | PA |
| — | 610-326 | not yet reported which blocks → | VERIZON PENNSYLVANIA, INC. | 9208 | POTTSTOWN | PA |
| — | 610-327 | not yet reported which blocks → | VERIZON PENNSYLVANIA, INC. | 9208 | POTTSTOWN | PA |
| — | 610-328 | not yet reported which blocks → | VERIZON PENNSYLVANIA, INC. | 9208 | PHPHSBZN13 | PA |
| — | 610-329 | not yet reported which blocks → | NEW CINGULAR WIRELESS PCS, LLC - DC | 4036 | PHPHSBZN30 | PA |
| — | 610-330 | 7XXX which blocks → | VERIZON PENNSYLVANIA, INC. | 9208 | EASTON | PA |
| — | 610-331 | not yet reported which blocks → | CELLCO PARTNERSHIP DBA VERIZON WIRELESS - PA | 6392 | PHPHSBZN30 | PA |
| — | 610-332 | not yet reported which blocks → | MCIMETRO ACCESS TRANSMISSION SERVICES LLC | 7229 | BETHLEHEM | PA |
| — | 610-333 | 0XXX2XXX3XXX4XXX5XXX6XXX7XXX8XXX9XXX · 4 holders which blocks → | TELEPORT COMMUNICATIONS AMERICA, LLC - PA | 7309 | EASTON | PA |
| — | 610-334 | not yet reported which blocks → | CELLCO PARTNERSHIP DBA VERIZON WIRELESS - PA | 6392 | READING | PA |
| — | 610-335 | 1XXX3XXX4XXX5XXX6XXX7XXX9XXX · 4 holders which blocks → | TELEPORT COMMUNICATIONS AMERICA, LLC - PA | 7309 | KENNETT SQ | PA |
| — | 610-336 | not yet reported which blocks → | VERIZON PENNSYLVANIA, INC. | 9208 | ALLENTOWN | PA |
| — | 610-337 | not yet reported which blocks → | VERIZON PENNSYLVANIA, INC. | 9208 | PHPHSBZN30 | PA |
| — | 610-338 | 5XXX which blocks → | VERIZON PENNSYLVANIA, INC. | 9208 | PHPHSBZN13 | PA |
| — | 610-339 | not yet reported which blocks → | SPOK, INC. | 6630 | ALLENTOWN | PA |
| — | 610-341 | none assigned yet which blocks → | VERIZON PENNSYLVANIA, INC. | 9208 | PHPHSBZN26 | PA |
| — | 610-342 | 0XXX2XXX3XXX4XXX5XXX6XXX7XXX8XXX · 3 holders which blocks → | TELEPORT COMMUNICATIONS AMERICA, LLC - PA | 7309 | COLLEGEVL | PA |
| — | 610-343 | 1XXX2XXX3XXX4XXX5XXX6XXX7XXX8XXX9XXX · 4 holders which blocks → | TELEPORT COMMUNICATIONS AMERICA, LLC - PA | 7309 | DOWNINGTN | PA |
| — | 610-344 | not yet reported which blocks → | VERIZON PENNSYLVANIA, INC. | 9208 | W CHESTER | PA |
| — | 610-345 | 2XXX3XXX4XXX5XXX6XXX7XXX8XXX · 6 holders which blocks → | VERIZON PENNSYLVANIA, INC. | 9208 | WEST GROVE | PA |
| — | 610-346 | 1XXX3XXX4XXX5XXX · 3 holders which blocks → | VERIZON PENNSYLVANIA, INC. | 9208 | SPRINGTOWN | PA |
| — | 610-347 | 3XXX4XXX5XXX7XXX8XXX9XXX · 5 holders which blocks → | VERIZON PENNSYLVANIA, INC. | 9208 | UNIONVILLE | PA |
| — | 610-348 | none assigned yet which blocks → | OMNIPOINT COMMUNICATIONS ENTERPRISES, LP | 6626 | PHPHSBZN24 | PA |
| — | 610-349 | not yet reported which blocks → | CELLCO PARTNERSHIP DBA VERIZON WIRELESS - PA | 6392 | ALLENTOWN | PA |
| — | 610-350 | 1XXX4XXX5XXX6XXX7XXX8XXX9XXX · 3 holders which blocks → | PAETEC ITEL, LLC | 829J | W CHESTER | PA |
| — | 610-351 | not yet reported which blocks → | RCN TELECOM SERVICES OF PENNSYLVANIA, INC. | 7615 | ALLENTOWN | PA |
| — | 610-352 | not yet reported which blocks → | VERIZON PENNSYLVANIA, INC. | 9208 | PHPHSBZN17 | PA |
| — | 610-353 | not yet reported which blocks → | VERIZON PENNSYLVANIA, INC. | 9208 | PHPHSBZN22 | PA |
| — | 610-354 | not yet reported which blocks → | VERIZON PENNSYLVANIA, INC. | 9208 | PHPHSBZN30 | PA |
| — | 610-355 | 4XXX5XXX6XXX · 2 holders which blocks → | VERIZON PENNSYLVANIA, INC. | 9208 | PHPHSBZN22 | PA |
| — | 610-356 | not yet reported which blocks → | VERIZON PENNSYLVANIA, INC. | 9208 | PHPHSBZN22 | PA |
| — | 610-357 | not yet reported which blocks → | CELLCO PARTNERSHIP DBA VERIZON WIRELESS - PA | 6392 | PHPHSBZN10 | PA |
| — | 610-358 | not yet reported which blocks → | VERIZON PENNSYLVANIA, INC. | 9208 | PHPHSBZN10 | PA |
| — | 610-359 | not yet reported which blocks → | VERIZON PENNSYLVANIA, INC. | 9208 | PHPHSBZN22 | PA |
| — | 610-360 | not yet reported which blocks → | CELLCO PARTNERSHIP DBA VERIZON WIRELESS - PA | 6392 | BETHLEHEM | PA |
| — | 610-361 | not yet reported which blocks → | VERIZON PENNSYLVANIA, INC. | 9208 | PHPHSBZN10 | PA |
| — | 610-362 | 3XXX5XXX6XXX8XXX9XXX · 5 holders which blocks → | VERIZON PENNSYLVANIA, INC. | 9208 | PHPHSBZN14 | PA |
| — | 610-363 | not yet reported which blocks → | VERIZON PENNSYLVANIA, INC. | 9208 | EXTON | PA |
| — | 610-364 | 5XXX6XXX · 2 holders which blocks → | VERIZON PENNSYLVANIA, INC. | 9208 | PHPHSBZN11 | PA |
| — | 610-365 | 1XXX3XXX4XXX7XXX · 3 holders which blocks → | RCN TELECOM SERVICES OF PENNSYLVANIA, INC. | 7615 | NAZARETH | PA |
| — | 610-366 | not yet reported which blocks → | VERIZON PENNSYLVANIA, INC. | 9208 | ALLENTOWN | PA |
| — | 610-367 | not yet reported which blocks → | WINDSTREAM CONESTOGA, INC. | 0162 | BOYERTOWN | PA |
| — | 610-368 | not yet reported which blocks → | CELLCO PARTNERSHIP DBA VERIZON WIRELESS - PA | 6392 | PHPHSBZN10 | 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.