NumberResearchRecent prefix assignments
347 prefixes assigned in the last 30 days · from the daily NANPA CO code file, 09/29/2026
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
Sep 2026
Aug 2026
Jul 2026
Jun 2026
May 2026
Apr 2026
Mar 2026
Feb 2026
Jan 2026
Dec 2025
Nov 2025
Oct 2025
Quick find in this area code:
| Assigned | NPA-NXX | Thousands-blocks taken (last-4 opening) | Code holder | OCN | Rate center | State |
|---|---|---|---|---|---|---|
| — | 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 |
| — | 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 |
Source: NANPA CO Code Assignments (Utilized, All States, Public), file date 09/29/2026 — Tier A primary source, refreshed on every import. Viewing is free; bulk downloads require a membership.