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 |
|---|---|---|---|---|---|---|
| — | 610-235 | 1XXX2XXX3XXX4XXX6XXX7XXX8XXX9XXX · 6 holders which blocks → | MCIMETRO ACCESS TRANSMISSION SERVICES LLC - PA | 7434 | W CHESTER | PA |
| — | 610-236 | 2XXX3XXX5XXX6XXX7XXX · 3 holders which blocks → | VERIZON PENNSYLVANIA, INC. | 9208 | READING | PA |
| — | 610-237 | not yet reported which blocks → | VERIZON PENNSYLVANIA, INC. | 9208 | PHPHSBZN14 | PA |
| — | 610-238 | 8XXX which blocks → | VERIZON PENNSYLVANIA, INC. | 9208 | PHPHSBZN31 | PA |
| — | 610-239 | not yet reported which blocks → | VERIZON PENNSYLVANIA, INC. | 9208 | PHPHSBZN30 | PA |
| — | 610-240 | not yet reported which blocks → | VERIZON PENNSYLVANIA, INC. | 9208 | PHPHSBZN28 | PA |
| — | 610-241 | 0XXX2XXX4XXX5XXX6XXX7XXX8XXX · 4 holders which blocks → | MCIMETRO ACCESS TRANSMISSION SERVICES LLC - PA | 7434 | W CHESTER | PA |
| — | 610-242 | 0XXX1XXX2XXX3XXX4XXX5XXX6XXX7XXX8XXX · 4 holders which blocks → | MCIMETRO ACCESS TRANSMISSION SERVICES LLC - PA | 7434 | WESTTOWN | PA |
| — | 610-243 | 0XXX1XXX2XXX3XXX4XXX5XXX6XXX7XXX8XXX · 4 holders which blocks → | MCIMETRO ACCESS TRANSMISSION SERVICES LLC - PA | 7434 | LENAPE | PA |
| — | 610-244 | 1XXX8XXX which blocks → | VERIZON PENNSYLVANIA, INC. | 9208 | COLLEGEVL | PA |
| — | 610-245 | 0XXX1XXX3XXX4XXX5XXX6XXX7XXX8XXX · 7 holders which blocks → | MCIMETRO ACCESS TRANSMISSION SERVICES LLC - PA | 7434 | PHPHSBZN11 | PA |
| — | 610-246 | not yet reported which blocks → | CELLCO PARTNERSHIP DBA VERIZON WIRELESS - PA | 6392 | PHPHSBZN30 | PA |
| — | 610-247 | not yet reported which blocks → | CELLCO PARTNERSHIP DBA VERIZON WIRELESS - PA | 6392 | PHPHSBZN30 | PA |
| — | 610-248 | not yet reported which blocks → | CELLCO PARTNERSHIP DBA VERIZON WIRELESS - PA | 6392 | BETHLEHEM | PA |
| — | 610-249 | 1XXX4XXX6XXX8XXX which blocks → | MCIMETRO ACCESS TRANSMISSION SERVICES LLC - PA | 7434 | PHPHSBZN28 | PA |
| — | 610-250 | not yet reported which blocks → | VERIZON PENNSYLVANIA, INC. | 9208 | EASTON | PA |
| — | 610-251 | 8XXX which blocks → | VERIZON PENNSYLVANIA, INC. | 9208 | PHPHSBZN28 | PA |
| — | 610-252 | not yet reported which blocks → | VERIZON PENNSYLVANIA, INC. | 9208 | EASTON | PA |
| — | 610-253 | not yet reported which blocks → | VERIZON PENNSYLVANIA, INC. | 9208 | EASTON | PA |
| — | 610-254 | not yet reported which blocks → | VERIZON PENNSYLVANIA, INC. | 9208 | PHPHSBZN26 | PA |
| — | 610-255 | 2XXX6XXX7XXX8XXX · 4 holders which blocks → | VERIZON PENNSYLVANIA, INC. | 9208 | KEMBLESVL | PA |
| — | 610-256 | not yet reported which blocks → | CELLCO PARTNERSHIP DBA VERIZON WIRELESS - PA | 6392 | PHPHSBZN30 | PA |
| — | 610-257 | 0XXX1XXX2XXX4XXX6XXX7XXX8XXX · 3 holders which blocks → | MCIMETRO ACCESS TRANSMISSION SERVICES LLC - PA | 7434 | PHPHSBZN23 | PA |
| — | 610-258 | not yet reported which blocks → | VERIZON PENNSYLVANIA, INC. | 9208 | EASTON | PA |
| — | 610-259 | not yet reported which blocks → | VERIZON PENNSYLVANIA, INC. | 9208 | PHPHSBZN17 | PA |
| — | 610-260 | 5XXX which blocks → | VERIZON PENNSYLVANIA, INC. | 9208 | PHPHSBZN31 | PA |
| — | 610-261 | 5XXX6XXX7XXX8XXX · 2 holders which blocks → | VERIZON PENNSYLVANIA, INC. | 9208 | NORTHAMPTN | PA |
| — | 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 |
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.