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 |
|---|---|---|---|---|---|---|
| — | 610-262 | not yet reported which blocks → | VERIZON PENNSYLVANIA, INC. | 9208 | NORTHAMPTN | PA |
| — | 610-263 | 6XXX which blocks → | MCIMETRO ACCESS TRANSMISSION SERVICES LLC - PA | 7434 | PHPHSBZN26 | PA |
| — | 610-264 | not yet reported which blocks → | VERIZON PENNSYLVANIA, INC. | 9208 | CATASAUQUA | PA |
| — | 610-265 | not yet reported which blocks → | VERIZON PENNSYLVANIA, INC. | 9208 | PHPHSBZN30 | PA |
| — | 610-266 | not yet reported which blocks → | VERIZON PENNSYLVANIA, INC. | 9208 | CATASAUQUA | PA |
| — | 610-268 | 4XXX6XXX7XXX9XXX · 3 holders which blocks → | VERIZON PENNSYLVANIA, INC. | 9208 | AVONDALE | PA |
| — | 610-269 | not yet reported which blocks → | VERIZON PENNSYLVANIA, INC. | 9208 | DOWNINGTN | PA |
| — | 610-270 | not yet reported which blocks → | VERIZON PENNSYLVANIA, INC. | 9208 | PHPHSBZN30 | PA |
| — | 610-271 | 0XXX1XXX2XXX3XXX4XXX5XXX6XXX7XXX8XXX · 3 holders which blocks → | MCIMETRO ACCESS TRANSMISSION SERVICES LLC - PA | 7434 | PHPHSBZN29 | PA |
| — | 610-272 | not yet reported which blocks → | VERIZON PENNSYLVANIA, INC. | 9208 | PHPHSBZN30 | PA |
| — | 610-273 | 0XXX5XXX6XXX8XXX · 4 holders which blocks → | VERIZON PENNSYLVANIA, INC. | 9208 | HONEYBROOK | PA |
| — | 610-274 | 4XXX5XXX6XXX7XXX9XXX · 3 holders which blocks → | VERIZON PENNSYLVANIA, INC. | 9208 | LANDENBERG | PA |
| — | 610-275 | not yet reported which blocks → | VERIZON PENNSYLVANIA, INC. | 9208 | PHPHSBZN30 | PA |
| — | 610-276 | 0XXX2XXX5XXX6XXX8XXX · 4 holders which blocks → | MCIMETRO ACCESS TRANSMISSION SERVICES LLC - PA | 7434 | PHPHSBZN31 | PA |
| — | 610-277 | not yet reported which blocks → | VERIZON PENNSYLVANIA, INC. | 9208 | PHPHSBZN30 | PA |
| — | 610-278 | not yet reported which blocks → | VERIZON PENNSYLVANIA, INC. | 9208 | PHPHSBZN30 | PA |
| — | 610-279 | not yet reported which blocks → | VERIZON PENNSYLVANIA, INC. | 9208 | PHPHSBZN30 | PA |
| — | 610-280 | not yet reported which blocks → | VERIZON PENNSYLVANIA, INC. | 9208 | EXTON | PA |
| — | 610-281 | 0XXX3XXX4XXX9XXX which blocks → | SCHUYLKILL MOBILE FONE, INC. | 6739 | KUTZTOWN | PA |
| — | 610-282 | not yet reported which blocks → | COMMONWEALTH TELEPHONE COMPANY LLC | 0161 | COOPERSBG | PA |
| — | 610-283 | not yet reported which blocks → | CELLCO PARTNERSHIP DBA VERIZON WIRELESS - PA | 6392 | PHPHSBZN30 | PA |
| — | 610-284 | not yet reported which blocks → | VERIZON PENNSYLVANIA, INC. | 9208 | PHPHSBZN17 | PA |
| — | 610-285 | 1XXX3XXX7XXX8XXX9XXX which blocks → | VERIZON NORTH, INC. - PA (QUAKER ST) | 0201 | NEWSMITHVL | PA |
| — | 610-286 | not yet reported which blocks → | WINDSTREAM CONESTOGA, INC. | 0162 | MORGANTOWN | PA |
| — | 610-287 | not yet reported which blocks → | VERIZON PENNSYLVANIA, INC. | 9208 | SCHWENKSVL | PA |
| — | 610-288 | not yet reported which blocks → | MCIMETRO ACCESS TRANSMISSION SERVICES LLC | 7229 | READING | PA |
| — | 610-289 | not yet reported which blocks → | MCIMETRO ACCESS TRANSMISSION SERVICES LLC | 7229 | ALLENTOWN | PA |
| — | 610-290 | 2XXX3XXX6XXX which blocks → | MCIMETRO ACCESS TRANSMISSION SERVICES LLC - PA | 7434 | PHPHSBZN30 | PA |
| — | 610-291 | not yet reported which blocks → | CELLCO PARTNERSHIP DBA VERIZON WIRELESS - PA | 6392 | PHPHSBZN30 | PA |
| — | 610-292 | not yet reported which blocks → | VERIZON PENNSYLVANIA, INC. | 9208 | PHPHSBZN30 | PA |
| — | 610-293 | not yet reported which blocks → | VERIZON PENNSYLVANIA, INC. | 9208 | PHPHSBZN26 | PA |
| — | 610-294 | 1XXX2XXX7XXX · 2 holders which blocks → | COMMONWEALTH TELEPHONE COMPANY LLC | 0161 | UHLERSTOWN | PA |
| — | 610-295 | 1XXX2XXX3XXX4XXX5XXX6XXX7XXX8XXX9XXX · 4 holders which blocks → | TELEPORT COMMUNICATIONS AMERICA, LLC - PA | 7309 | ALLENTOWN | PA |
| — | 610-296 | not yet reported which blocks → | VERIZON PENNSYLVANIA, INC. | 9208 | PHPHSBZN28 | PA |
| — | 610-297 | 0XXX1XXX2XXX3XXX4XXX5XXX6XXX7XXX9XXX · 4 holders which blocks → | TELEPORT COMMUNICATIONS AMERICA, LLC - PA | 7309 | BETHLEHEM | PA |
| — | 610-298 | 0XXX1XXX4XXX5XXX6XXX7XXX9XXX · 6 holders which blocks → | VERIZON NORTH, INC. - PA (QUAKER ST) | 0201 | NEWTRIPOLI | PA |
| — | 610-299 | not yet reported which blocks → | CELLCO PARTNERSHIP DBA VERIZON WIRELESS - PA | 6392 | PHPHSBZN10 | PA |
| — | 610-303 | not yet reported which blocks → | SPOK, INC. | 6630 | PHPHSBZN25 | PA |
| — | 610-304 | not yet reported which blocks → | CELLCO PARTNERSHIP DBA VERIZON WIRELESS - PA | 6392 | PHPHSBZN30 | PA |
| — | 610-305 | not yet reported which blocks → | SPOK, INC. | 6630 | PHPHSBZN25 | PA |
| — | 610-306 | not yet reported which blocks → | NEW CINGULAR WIRELESS PCS, LLC - DC | 4036 | PHPHSBZN30 | PA |
| — | 610-307 | not yet reported which blocks → | SPOK, INC. | 6630 | PHPHSBZN25 | PA |
| — | 610-308 | not yet reported which blocks → | NEW CINGULAR WIRELESS PCS, LLC - DC | 4036 | PHPHSBZN30 | PA |
| — | 610-309 | not yet reported which blocks → | SPOK, INC. | 6630 | PHPHSBZN25 | PA |
| — | 610-311 | not yet reported which blocks → | MULTIPLE OCN LISTING | MULT | XXXXXXXXXX | PA |
| — | 610-312 | 1XXX3XXX4XXX6XXX7XXX8XXX9XXX which blocks → | MCIMETRO ACCESS TRANSMISSION SERVICES LLC - PA | 7434 | PHPHSBZN30 | PA |
| — | 610-313 | not yet reported which blocks → | VERIZON PENNSYLVANIA, INC. | 9208 | PHPHSBZN30 | PA |
| — | 610-315 | not yet reported which blocks → | SPOK, INC. | 6630 | PHPHSBZN25 | PA |
| — | 610-316 | not yet reported which blocks → | NEW CINGULAR WIRELESS PCS, LLC - DC | 4036 | PHPHSBZN30 | PA |
| — | 610-317 | not yet reported which blocks → | VERIZON PENNSYLVANIA, INC. | 9208 | BETHLEHEM | 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.