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 |
|---|---|---|---|---|---|---|
| 2002-09-27 | 610-800 | 0XXX5XXX7XXX8XXX which blocks → | OMNIPOINT COMMUNICATIONS ENTERPRISES, LP | 6626 | PHPHSBZN11 | PA |
| 2002-09-27 | 610-809 | 0XXX5XXX7XXX8XXX which blocks → | OMNIPOINT COMMUNICATIONS ENTERPRISES, LP | 6626 | PHPHSBZN14 | PA |
| 2002-09-27 | 610-931 | 0XXX7XXX which blocks → | OMNIPOINT COMMUNICATIONS ENTERPRISES, LP | 6626 | PHPHSBZN17 | PA |
| 2002-02-13 | 610-452 | 9XXX which blocks → | SERVICE ELECTRIC TELEPHONE COMPANY, LLC | 8320 | BANGOR | PA |
| 2002-02-13 | 610-654 | 9XXX which blocks → | SERVICE ELECTRIC TELEPHONE COMPANY, LLC | 8320 | PEN ARGYL | PA |
| 2001-05-21 | 610-310 | not yet reported which blocks → | CELLCO PARTNERSHIP DBA VERIZON WIRELESS - PA | 6392 | POTTSTOWN | PA |
| 2001-04-12 | 610-880 | 0XXX2XXX3XXX4XXX5XXX6XXX7XXX8XXX · 5 holders which blocks → | OMNIPOINT COMMUNICATIONS ENTERPRISES, LP | 6626 | AVONDALE | PA |
| 2001-03-21 | 610-200 | 1XXX2XXX3XXX4XXX5XXX6XXX7XXX8XXX9XXX · 6 holders which blocks → | CORE COMMUNICATIONS, INC. - PA | 3806 | PHPHSBZN14 | PA |
| 2001-03-21 | 610-300 | 1XXX2XXX3XXX4XXX5XXX6XXX7XXX8XXX9XXX · 2 holders which blocks → | CORE COMMUNICATIONS, INC. - PA | 3806 | PHOENIXVL | PA |
| 2001-03-21 | 610-301 | 1XXX2XXX3XXX4XXX5XXX6XXX7XXX8XXX9XXX which blocks → | CORE COMMUNICATIONS, INC. - PA | 3806 | READING | PA |
| 2001-03-21 | 610-400 | 1XXX2XXX3XXX4XXX5XXX6XXX7XXX8XXX9XXX · 3 holders which blocks → | CORE COMMUNICATIONS, INC. - PA | 3806 | COATESVL | PA |
| 2001-03-21 | 610-510 | 1XXX2XXX3XXX4XXX5XXX6XXX7XXX8XXX9XXX · 4 holders which blocks → | CORE COMMUNICATIONS, INC. - PA | 3806 | RIEGELSVL | PA |
| 2001-03-21 | 610-600 | 1XXX2XXX3XXX4XXX5XXX6XXX7XXX8XXX9XXX · 3 holders which blocks → | CORE COMMUNICATIONS, INC. - PA | 3806 | UPBLCKEDDY | PA |
| 2001-03-21 | 610-810 | 1XXX2XXX3XXX4XXX5XXX6XXX7XXX8XXX9XXX · 5 holders which blocks → | CORE COMMUNICATIONS, INC. - PA | 3806 | EASTON | PA |
| 2001-03-21 | 610-844 | 1XXX2XXX3XXX4XXX5XXX6XXX7XXX8XXX9XXX · 3 holders which blocks → | CORE COMMUNICATIONS, INC. - PA | 3806 | ALLENTOWN | PA |
| 2001-03-21 | 610-955 | 1XXX2XXX3XXX4XXX5XXX6XXX7XXX8XXX9XXX which blocks → | CORE COMMUNICATIONS, INC. - PA | 3806 | PHPHSBZN30 | PA |
| 2001-03-21 | 610-990 | 1XXX2XXX3XXX4XXX5XXX6XXX7XXX8XXX9XXX · 4 holders which blocks → | CORE COMMUNICATIONS, INC. - PA | 3806 | PHPHSBZN11 | PA |
| 2001-03-19 | 610-224 | 9XXX which blocks → | SERVICE ELECTRIC TELEPHONE COMPANY, LLC | 8320 | SLATINGTON | PA |
| 2001-03-08 | 610-769 | not yet reported which blocks → | IRONTON TEL. CO. | 0175 | IRONTON | PA |
| — | 610-201 | not yet reported which blocks → | XXXXXXXXXX | PA | ||
| — | 610-202 | not yet reported which blocks → | OMNIPOINT COMMUNICATIONS ENTERPRISES, LP | 6626 | PHPHSBZN28 | PA |
| — | 610-203 | not yet reported which blocks → | OMNIPOINT COMMUNICATIONS ENTERPRISES, LP | 6626 | PHPHSBZN26 | PA |
| — | 610-204 | not yet reported which blocks → | SCHUYLKILL MOBILE FONE, INC. | 6739 | ALLENTOWN | PA |
| — | 610-205 | 4XXX5XXX7XXX9XXX · 3 holders which blocks → | VERIZON PENNSYLVANIA, INC. | 9208 | PHPHSBZN30 | PA |
| — | 610-206 | 0XXX1XXX3XXX4XXX5XXX6XXX7XXX8XXX9XXX · 4 holders which blocks → | VERIZON PENNSYLVANIA, INC. | 9208 | PHPHSBZN23 | PA |
| — | 610-207 | not yet reported which blocks → | CELLCO PARTNERSHIP DBA VERIZON WIRELESS - PA | 6392 | READING | PA |
| — | 610-208 | not yet reported which blocks → | VERIZON PENNSYLVANIA, INC. | 9208 | READING | PA |
| — | 610-209 | not yet reported which blocks → | NEW CINGULAR WIRELESS PCS, LLC - DC | 4036 | PHPHSBZN30 | PA |
| — | 610-210 | not yet reported which blocks → | VERIZON PENNSYLVANIA, INC. | 9208 | XXXXXXXXXX | PA |
| — | 610-211 | not yet reported which blocks → | MULTIPLE OCN LISTING | MULT | XXXXXXXXXX | PA |
| — | 610-212 | not yet reported which blocks → | CELLCO PARTNERSHIP DBA VERIZON WIRELESS - PA | 6392 | PHPHSBZN30 | PA |
| — | 610-213 | not yet reported which blocks → | CELLCO PARTNERSHIP DBA VERIZON WIRELESS - PA | 6392 | PHPHSBZN30 | PA |
| — | 610-216 | not yet reported which blocks → | CELLCO PARTNERSHIP DBA VERIZON WIRELESS - PA | 6392 | BETHLEHEM | PA |
| — | 610-217 | not yet reported which blocks → | CELLCO PARTNERSHIP DBA VERIZON WIRELESS - PA | 6392 | BETHLEHEM | PA |
| — | 610-218 | not yet reported which blocks → | SPOK, INC. | 6630 | ALLENTOWN | PA |
| — | 610-219 | not yet reported which blocks → | VERIZON PENNSYLVANIA, INC. | 9208 | PHPHSBZN28 | PA |
| — | 610-220 | not yet reported which blocks → | CELLCO PARTNERSHIP DBA VERIZON WIRELESS - PA | 6392 | PHPHSBZN30 | PA |
| — | 610-221 | not yet reported which blocks → | SPOK, INC. | 6630 | PHPHSBZN25 | PA |
| — | 610-222 | 1XXX5XXX6XXX7XXX · 4 holders which blocks → | VERIZON PENNSYLVANIA, INC. | 9208 | CENTER PT | PA |
| — | 610-223 | not yet reported which blocks → | CELLCO PARTNERSHIP DBA VERIZON WIRELESS - PA | 6392 | READING | PA |
| — | 610-225 | 4XXX which blocks → | VERIZON PENNSYLVANIA, INC. | 9208 | PHPHSBZN26 | PA |
| — | 610-226 | 0XXX1XXX3XXX4XXX7XXX8XXX9XXX · 6 holders which blocks → | MCIMETRO ACCESS TRANSMISSION SERVICES LLC - PA | 7434 | COLLEGEVL | PA |
| — | 610-227 | 3XXX4XXX6XXX7XXX8XXX9XXX · 5 holders which blocks → | MCIMETRO ACCESS TRANSMISSION SERVICES LLC - PA | 7434 | PHPHSBZN23 | PA |
| — | 610-228 | 0XXX1XXX3XXX4XXX5XXX7XXX8XXX9XXX · 3 holders which blocks → | MCIMETRO ACCESS TRANSMISSION SERVICES LLC - PA | 7434 | PHPHSBZN24 | PA |
| — | 610-229 | 0XXX1XXX2XXX3XXX4XXX5XXX6XXX7XXX8XXX · 5 holders which blocks → | MCIMETRO ACCESS TRANSMISSION SERVICES LLC - PA | 7434 | PHPHSBZN25 | PA |
| — | 610-230 | 1XXX5XXX6XXX7XXX9XXX · 3 holders which blocks → | MCIMETRO ACCESS TRANSMISSION SERVICES LLC - PA | 7434 | PHPHSBZN26 | PA |
| — | 610-231 | not yet reported which blocks → | VERIZON PENNSYLVANIA, INC. | 9208 | CATASAUQUA | PA |
| — | 610-232 | 4XXX6XXX7XXX9XXX · 3 holders which blocks → | MCIMETRO ACCESS TRANSMISSION SERVICES LLC - PA | 7434 | PHPHSBZN28 | PA |
| — | 610-233 | 3XXX5XXX6XXX7XXX8XXX9XXX · 2 holders which blocks → | MCIMETRO ACCESS TRANSMISSION SERVICES LLC - PA | 7434 | PHPHSBZN30 | PA |
| — | 610-234 | 1XXX3XXX6XXX7XXX8XXX9XXX · 5 holders which blocks → | MCIMETRO ACCESS TRANSMISSION SERVICES LLC - PA | 7434 | PHPHSBZN31 | 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.