NumberResearchRecent prefix assignments
358 prefixes assigned in the last 30 days · from the daily NANPA CO code file, 09/24/2026
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 |
|---|---|---|---|---|---|---|
| — | 267-296 | 0XXX1XXX2XXX3XXX4XXX5XXX6XXX8XXX9XXX · 3 holders which blocks → | NETCARRIER TELECOM, INC. - PA | 5494 | PHLDLPHZN2 | PA |
| — | 267-297 | 0XXX1XXX2XXX3XXX5XXX6XXX7XXX8XXX9XXX · 3 holders which blocks → | LEVEL 3 COMMUNICATIONS, LLC - PA | 4007 | PHLDLPHZN3 | PA |
| — | 267-298 | 0XXX6XXX7XXX8XXX9XXX · 2 holders which blocks → | PAETEC ITEL, LLC | 829J | PHLDLPHZN2 | PA |
| — | 267-299 | 3XXX4XXX7XXX8XXX9XXX · 4 holders which blocks → | LEVEL 3 COMMUNICATIONS, LLC - PA | 4007 | PHLDLPHZN2 | PA |
| — | 267-304 | not yet reported which blocks → | OMNIPOINT COMMUNICATIONS ENTERPRISES, LP | 6626 | PHLDLPHZN1 | PA |
| — | 267-305 | not yet reported which blocks → | VERIZON PENNSYLVANIA, INC. | 9208 | NORTHWALES | PA |
| — | 267-306 | 0XXX1XXX3XXX4XXX6XXX7XXX8XXX9XXX · 3 holders which blocks → | LEVEL 3 COMMUNICATIONS, LLC - PA | 4007 | YARDLEY | PA |
| — | 267-307 | not yet reported which blocks → | OMNIPOINT COMMUNICATIONS ENTERPRISES, LP | 6626 | PHLDLPHZN1 | PA |
| — | 267-308 | 3XXX4XXX5XXX6XXX7XXX8XXX · 4 holders which blocks → | PAETEC ITEL, LLC | 829J | LINELXNGTN | PA |
| — | 267-311 | not yet reported which blocks → | MULTIPLE OCN LISTING | MULT | XXXXXXXXXX | PA |
| — | 267-312 | not yet reported which blocks → | OMNIPOINT COMMUNICATIONS ENTERPRISES, LP | 6626 | PHLDLPHZN1 | PA |
| — | 267-316 | 3XXX4XXX5XXX6XXX7XXX8XXX · 2 holders which blocks → | PAETEC ITEL, LLC | 829J | MORRISVL | PA |
| — | 267-321 | 0XXX9XXX · 2 holders which blocks → | VERIZON PENNSYLVANIA, INC. | 9208 | PHLDLPHZN1 | PA |
| — | 267-323 | 0–9 XXXall 10 · 5 holders which blocks → | OMNIPOINT COMMUNICATIONS ENTERPRISES, LP | 6626 | PHLDLPHZN3 | PA |
| — | 267-328 | 0XXX3XXX4XXX5XXX6XXX7XXX8XXX9XXX · 7 holders which blocks → | PAETEC ITEL, LLC | 829J | LANSDALE | PA |
| — | 267-329 | 0XXX3XXX4XXX5XXX6XXX7XXX8XXX9XXX · 5 holders which blocks → | PAETEC ITEL, LLC | 829J | GREEN LANE | PA |
| — | 267-330 | 9XXX which blocks → | VERIZON PENNSYLVANIA, INC. | 9208 | PHLDLPHZN1 | PA |
| — | 267-331 | 0XXX1XXX3XXX4XXX5XXX6XXX7XXX8XXX9XXX · 5 holders which blocks → | LEVEL 3 COMMUNICATIONS, LLC - PA | 4007 | PHLDLPHZN3 | PA |
| — | 267-334 | not yet reported which blocks → | OMNIPOINT COMMUNICATIONS ENTERPRISES, LP | 6626 | PHLDLPHZN1 | PA |
| — | 267-335 | 2XXX3XXX4XXX5XXX6XXX7XXX · 2 holders which blocks → | PAETEC ITEL, LLC | 829J | PHLDLPHZN3 | PA |
| — | 267-336 | 0XXX1XXX3XXX4XXX5XXX7XXX8XXX9XXX · 3 holders which blocks → | LEVEL 3 COMMUNICATIONS, LLC - PA | 4007 | PHLDLPHZN3 | PA |
| — | 267-338 | 3XXX4XXX5XXX6XXX7XXX8XXX9XXX · 2 holders which blocks → | PAETEC ITEL, LLC | 829J | PHLDLPHZN3 | PA |
| — | 267-339 | 1XXX2XXX4XXX5XXX6XXX8XXX9XXX · 3 holders which blocks → | PAETEC ITEL, LLC | 829J | PHLDLPHZN3 | PA |
| — | 267-341 | 0–9 XXXall 10 · 4 holders which blocks → | PAETEC ITEL, LLC | 829J | PHLDLPHZN4 | PA |
| — | 267-343 | 1XXX2XXX3XXX4XXX5XXX6XXX7XXX8XXX9XXX · 4 holders which blocks → | PAETEC ITEL, LLC | 829J | PHLDLPHZN4 | PA |
| — | 267-344 | 0XXX1XXX3XXX5XXX6XXX7XXX8XXX9XXX · 4 holders which blocks → | MCIMETRO ACCESS TRANSMISSION SERVICES LLC | 7229 | PHLDLPHZN4 | PA |
| — | 267-345 | 3XXX5XXX6XXX8XXX which blocks → | MCIMETRO ACCESS TRANSMISSION SERVICES LLC - PA | 7434 | PHLDLPHZN4 | PA |
| — | 267-348 | 4XXX5XXX6XXX7XXX8XXX9XXX · 3 holders which blocks → | PAETEC ITEL, LLC | 829J | PHLDLPHZN4 | PA |
| — | 267-350 | not yet reported which blocks → | PAETEC ITEL, LLC | 829J | PHLDLPHZN4 | PA |
| — | 267-351 | 0XXX1XXX3XXX4XXX5XXX6XXX7XXX · 3 holders which blocks → | LEVEL 3 COMMUNICATIONS, LLC - PA | 4007 | PHLDLPHZN4 | PA |
| — | 267-352 | 3XXX4XXX5XXX6XXX7XXX8XXX9XXX · 4 holders which blocks → | MCIMETRO ACCESS TRANSMISSION SERVICES LLC | 7229 | NEWTOWN | PA |
| — | 267-360 | 0–9 XXXall 10 · 8 holders which blocks → | LEVEL 3 COMMUNICATIONS, LLC - PA | 4007 | PLUMSTEDVL | PA |
| — | 267-362 | 0XXX2XXX3XXX4XXX5XXX6XXX7XXX8XXX9XXX · 4 holders which blocks → | PAETEC ITEL, LLC | 829J | PLUMSTEDVL | PA |
| — | 267-364 | 3XXX4XXX5XXX6XXX7XXX8XXX · 5 holders which blocks → | PAETEC ITEL, LLC | 829J | NEWTOWN | PA |
| — | 267-365 | 1XXX2XXX3XXX4XXX5XXX7XXX8XXX9XXX · 3 holders which blocks → | PAETEC ITEL, LLC | 829J | PLUMSTEDVL | PA |
| — | 267-369 | not yet reported which blocks → | ONVOY, LLC - PA | 547E | PLUMSTEDVL | PA |
| — | 267-371 | 0XXX2XXX3XXX5XXX6XXX7XXX8XXX9XXX · 4 holders which blocks → | LEVEL 3 COMMUNICATIONS, LLC - PA | 4007 | QUAKERTOWN | PA |
| — | 267-372 | 0–9 XXXall 10 · 3 holders which blocks → | CELLCO PARTNERSHIP DBA VERIZON WIRELESS - PA | 6392 | QUAKERTOWN | PA |
| — | 267-373 | 2XXX4XXX5XXX6XXX7XXX8XXX9XXX · 4 holders which blocks → | MCIMETRO ACCESS TRANSMISSION SERVICES LLC | 7229 | QUAKERTOWN | PA |
| — | 267-374 | not yet reported which blocks → | CELLCO PARTNERSHIP DBA VERIZON WIRELESS - PA | 6392 | QUAKERTOWN | PA |
| — | 267-375 | 0XXX1XXX2XXX3XXX4XXX5XXX6XXX9XXX · 2 holders which blocks → | RCN TELECOM SERVICES OF PENNSYLVANIA, INC. | 7615 | QUAKERTOWN | PA |
| — | 267-376 | not yet reported which blocks → | ONVOY, LLC - PA | 547E | QUAKERTOWN | PA |
| — | 267-377 | 0–9 XXXall 10 · 5 holders which blocks → | METROPCS, INC. | 5562 | QUAKERTOWN | PA |
| — | 267-378 | 1XXX2XXX3XXX4XXX5XXX7XXX8XXX9XXX · 5 holders which blocks → | PAETEC ITEL, LLC | 829J | QUAKERTOWN | PA |
| — | 267-379 | 0XXX1XXX2XXX3XXX4XXX5XXX6XXX7XXX8XXX · 5 holders which blocks → | LEVEL 3 COMMUNICATIONS, LLC - PA | 4007 | QUAKERTOWN | PA |
| — | 267-380 | 0XXX1XXX2XXX3XXX5XXX6XXX7XXX8XXX9XXX · 7 holders which blocks → | LEVEL 3 COMMUNICATIONS, LLC - PA | 4007 | SOUDERTON | PA |
| — | 267-381 | 0XXX1XXX3XXX4XXX5XXX6XXX7XXX8XXX9XXX · 2 holders which blocks → | LEVEL 3 COMMUNICATIONS, LLC - PA | 4007 | SOUDERTON | PA |
| — | 267-383 | 1XXX2XXX3XXX4XXX5XXX7XXX8XXX9XXX · 6 holders which blocks → | PAETEC ITEL, LLC | 829J | SOUDERTON | PA |
| — | 267-384 | 0XXX1XXX2XXX3XXX4XXX6XXX7XXX8XXX9XXX · 5 holders which blocks → | PAETEC ITEL, LLC | 829J | SOUDERTON | PA |
| — | 267-385 | 0XXX1XXX3XXX4XXX5XXX6XXX7XXX8XXX9XXX · 4 holders which blocks → | VERIZON PENNSYLVANIA, INC. | 9208 | PHLDLPHZN3 | PA |
Source: NANPA CO Code Assignments (Utilized, All States, Public), file date 09/24/2026 — Tier A primary source, refreshed on every import. Viewing is free; bulk downloads require a membership.