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 267
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| Assigned | NPA-NXX | Thousands-blocks taken (last-4 opening) | Code holder | OCN | Rate center | State |
|---|---|---|---|---|---|---|
| — | 267-552 | 4XXX5XXX6XXX7XXX8XXX9XXX · 5 holders which blocks → | LEVEL 3 COMMUNICATIONS, LLC - PA | 4007 | PHPHSBZN42 | PA |
| — | 267-553 | 0XXX2XXX3XXX4XXX5XXX6XXX8XXX9XXX · 2 holders which blocks → | BANDWIDTH.COM CLEC, LLC - PA | 002F | PHPHSBZN42 | PA |
| — | 267-554 | 1XXX2XXX3XXX4XXX7XXX9XXX · 5 holders which blocks → | PAETEC ITEL, LLC | 829J | PHPHSBZN42 | PA |
| — | 267-555 | not yet reported which blocks → | MULTIPLE OCN LISTING | MULT | DIR ASST | PA |
| — | 267-556 | none assigned yet which blocks → | LEVEL 3 COMMUNICATIONS, LLC - PA | 4007 | PHPHSBZN42 | PA |
| — | 267-557 | 0XXX2XXX5XXX9XXX which blocks → | PAETEC ITEL, LLC | 829J | PHPHSBZN42 | PA |
| — | 267-560 | 0XXX1XXX2XXX3XXX4XXX5XXX6XXX7XXX9XXX · 5 holders which blocks → | RCN TELECOM SERVICES OF PENNSYLVANIA, INC. | 7615 | PHPHSBZN43 | PA |
| — | 267-562 | 0–9 XXXall 10 · 2 holders which blocks → | CELLCO PARTNERSHIP DBA VERIZON WIRELESS - PA | 6392 | PHPHSBZN43 | PA |
| — | 267-563 | 0XXX1XXX2XXX3XXX4XXX5XXX6XXX8XXX9XXX · 3 holders which blocks → | PAETEC ITEL, LLC | 829J | PHPHSBZN43 | PA |
| — | 267-564 | 0XXX1XXX3XXX5XXX6XXX7XXX8XXX9XXX · 5 holders which blocks → | LEVEL 3 COMMUNICATIONS, LLC - PA | 4007 | PHPHSBZN43 | PA |
| — | 267-565 | 0–9 XXXall 10 · 2 holders which blocks → | ONVOY, LLC - PA | 547E | PHPHSBZN43 | PA |
| — | 267-566 | 8XXX9XXX which blocks → | CELLCO PARTNERSHIP DBA VERIZON WIRELESS - PA | 6392 | PHPHSBZN43 | PA |
| — | 267-567 | 0–9 XXXall 10 · 2 holders which blocks → | CELLCO PARTNERSHIP DBA VERIZON WIRELESS - PA | 6392 | PHPHSBZN43 | PA |
| — | 267-568 | 0–9 XXXall 10 · 3 holders which blocks → | CELLCO PARTNERSHIP DBA VERIZON WIRELESS - PA | 6392 | PHPHSBZN43 | PA |
| — | 267-569 | 5XXX6XXX8XXX9XXX which blocks → | PAETEC ITEL, LLC | 829J | PHPHSBZN43 | PA |
| — | 267-570 | 0XXX3XXX6XXX7XXX8XXX9XXX · 4 holders which blocks → | VERIZON PENNSYLVANIA, INC. | 9208 | PHLDLPHZN1 | PA |
| — | 267-571 | 0–9 XXXall 10 · 5 holders which blocks → | BANDWIDTH.COM CLEC, LLC - PA | 002F | PHPHSBZN37 | PA |
| — | 267-572 | 0XXX1XXX4XXX6XXX8XXX9XXX · 2 holders which blocks → | VERIZON PENNSYLVANIA, INC. | 9208 | PHPHSBZN43 | PA |
| — | 267-573 | 0–9 XXXall 10 · 6 holders which blocks → | LEVEL 3 COMMUNICATIONS, LLC - PA | 4007 | YARDLEY | PA |
| — | 267-574 | 0–9 XXXall 10 · 6 holders which blocks → | OMNIPOINT COMMUNICATIONS ENTERPRISES, LP | 6626 | PHPHSBZN40 | PA |
| — | 267-580 | 4XXX5XXX6XXX7XXX8XXX9XXX · 4 holders which blocks → | VERIZON PENNSYLVANIA, INC. | 9208 | PHPHSBZN44 | PA |
| — | 267-583 | 0XXX2XXX3XXX4XXX5XXX6XXX7XXX8XXX9XXX · 6 holders which blocks → | PAETEC ITEL, LLC | 829J | PHPHSBZN44 | PA |
| — | 267-585 | 0XXX1XXX2XXX3XXX4XXX5XXX6XXX7XXX8XXX · 5 holders which blocks → | LEVEL 3 COMMUNICATIONS, LLC - PA | 4007 | PHPHSBZN44 | PA |
| — | 267-587 | 1XXX6XXX7XXX · 2 holders which blocks → | PAETEC ITEL, LLC | 829J | PHPHSBZN44 | PA |
| — | 267-589 | 0–9 XXXall 10 · 4 holders which blocks → | ONVOY, LLC - PA | 547E | PHPHSBZN44 | PA |
| — | 267-590 | 0XXX2XXX3XXX4XXX5XXX6XXX7XXX9XXX · 3 holders which blocks → | MCIMETRO ACCESS TRANSMISSION SERVICES LLC | 7229 | PHPHSBZN44 | PA |
| — | 267-594 | 0XXX1XXX2XXX3XXX4XXX5XXX6XXX7XXX8XXX · 5 holders which blocks → | LEVEL 3 COMMUNICATIONS, LLC - PA | 4007 | PHPHSBZN44 | PA |
| — | 267-598 | 0–9 XXXall 10 · 6 holders which blocks → | BANDWIDTH.COM CLEC, LLC - PA | 002F | PHPHSBZN44 | PA |
| — | 267-599 | 1XXX5XXX6XXX7XXX8XXX9XXX · 5 holders which blocks → | LEVEL 3 COMMUNICATIONS, LLC - PA | 4007 | PHPHSBZN44 | PA |
| — | 267-604 | not yet reported which blocks → | PAETEC ITEL, LLC | 829J | PHPHSBZN32 | PA |
| — | 267-606 | 0–9 XXXall 10 · 6 holders which blocks → | CELLCO PARTNERSHIP DBA VERIZON WIRELESS - PA | 6392 | PHLDLPHZN1 | PA |
| — | 267-607 | 0–9 XXXall 10 · 6 holders which blocks → | BANDWIDTH.COM CLEC, LLC - PA | 002F | PHPHSBZN38 | PA |
| — | 267-608 | 0–9 XXXall 10 · 5 holders which blocks → | NEW CINGULAR WIRELESS PCS, LLC - DC | 4036 | PHLDLPHZN1 | PA |
| — | 267-609 | not yet reported which blocks → | ONVOY, LLC - PA | 547E | PHPHSBZN33 | PA |
| — | 267-611 | not yet reported which blocks → | MULTIPLE OCN LISTING | MULT | XXXXXXXXXX | PA |
| — | 267-612 | 0XXX2XXX3XXX4XXX6XXX7XXX8XXX · 5 holders which blocks → | LEVEL 3 COMMUNICATIONS, LLC - PA | 4007 | PENNSBURG | PA |
| — | 267-613 | 0XXX1XXX2XXX3XXX4XXX5XXX7XXX8XXX9XXX · 3 holders which blocks → | PAETEC ITEL, LLC | 829J | NORTHWALES | PA |
| — | 267-614 | 3XXX5XXX6XXX7XXX8XXX9XXX which blocks → | CELLCO PARTNERSHIP DBA VERIZON WIRELESS - PA | 6392 | DOYLESTOWN | PA |
| — | 267-615 | 1XXX2XXX3XXX4XXX5XXX6XXX7XXX8XXX9XXX · 2 holders which blocks → | LEVEL 3 COMMUNICATIONS, LLC - PA | 4007 | PHPHSBZN39 | PA |
| — | 267-620 | 6XXX7XXX which blocks → | PAETEC ITEL, LLC | 829J | PHPHSBZN34 | PA |
| — | 267-622 | 0XXX1XXX2XXX3XXX5XXX6XXX7XXX8XXX9XXX · 2 holders which blocks → | LEVEL 3 COMMUNICATIONS, LLC - PA | 4007 | PHPHSBZN34 | PA |
| — | 267-625 | 2XXX which blocks → | OMNIPOINT COMMUNICATIONS ENTERPRISES, LP | 6626 | PHPHSBZN34 | PA |
| — | 267-626 | 2XXX which blocks → | OMNIPOINT COMMUNICATIONS ENTERPRISES, LP | 6626 | PHPHSBZN34 | PA |
| — | 267-627 | 0–9 XXXall 10 · 6 holders which blocks → | ONVOY, LLC - PA | 547E | PHPHSBZN34 | PA |
| — | 267-628 | 0XXX6XXX7XXX8XXX9XXX · 2 holders which blocks → | PAETEC ITEL, LLC | 829J | PHPHSBZN34 | PA |
| — | 267-630 | 0–9 XXXall 10 · 3 holders which blocks → | OMNIPOINT COMMUNICATIONS ENTERPRISES, LP | 6626 | PHPHSBZN34 | PA |
| — | 267-632 | 1XXX2XXX3XXX4XXX5XXX6XXX7XXX8XXX9XXX · 2 holders which blocks → | LEVEL 3 COMMUNICATIONS, LLC - PA | 4007 | PHPHSBZN40 | PA |
| — | 267-633 | 0XXX1XXX2XXX4XXX5XXX6XXX7XXX8XXX9XXX · 4 holders which blocks → | LEVEL 3 COMMUNICATIONS, LLC - PA | 4007 | PHPHSBZN34 | PA |
| — | 267-635 | 0XXX2XXX3XXX4XXX5XXX6XXX7XXX8XXX9XXX · 4 holders which blocks → | LEVEL 3 COMMUNICATIONS, LLC - PA | 4007 | PHPHSBZN34 | PA |
| — | 267-636 | 0–9 XXXall 10 · 5 holders which blocks → | BANDWIDTH.COM CLEC, LLC - PA | 002F | PHPHSBZN34 | 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.