NumberResearchRecent prefix assignments
0 prefixes assigned in the last 30 days · from the daily NANPA CO code file, 09/19/2026
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.
| Assigned | NPA-NXX | Thousands-blocks taken (last-4 opening) | Code holder | OCN | Rate center | State |
|---|---|---|---|---|---|---|
| 2001-08-03 | 267-387 | 1XXX2XXX3XXX4XXX5XXX6XXX7XXX8XXX9XXX · 6 holders which blocks → | NETCARRIER TELECOM, INC. - PA | 5494 | PHPHSBZN39 | PA |
| 2001-08-03 | 267-699 | 1XXX2XXX3XXX4XXX6XXX7XXX8XXX9XXX · 5 holders which blocks → | NETCARRIER TELECOM, INC. - PA | 5494 | PHPHSBZN40 | PA |
| 2001-08-03 | 267-704 | 0XXX2XXX3XXX4XXX5XXX6XXX7XXX8XXX9XXX · 4 holders which blocks → | NETCARRIER TELECOM, INC. - PA | 5494 | PHPHSBZN41 | PA |
| 2001-08-02 | 267-203 | 2XXX3XXX4XXX5XXX6XXX7XXX8XXX · 5 holders which blocks → | NETCARRIER TELECOM, INC. - PA | 5494 | SOUDERTON | PA |
| 2001-08-02 | 267-212 | 1XXX2XXX3XXX4XXX5XXX6XXX7XXX8XXX9XXX · 3 holders which blocks → | NETCARRIER TELECOM, INC. - PA | 5494 | PHPHSBZN43 | PA |
| 2001-08-02 | 267-499 | 0XXX3XXX4XXX5XXX6XXX7XXX8XXX9XXX · 4 holders which blocks → | NETCARRIER TELECOM, INC. - PA | 5494 | PHLDLPHZN2 | PA |
| 2001-08-02 | 267-546 | 2XXX4XXX5XXX6XXX7XXX8XXX · 3 holders which blocks → | NETCARRIER TELECOM, INC. - PA | 5494 | PHLDLPHZN1 | PA |
| 2001-08-02 | 267-579 | 1XXX2XXX3XXX4XXX5XXX6XXX7XXX8XXX9XXX · 4 holders which blocks → | NETCARRIER TELECOM, INC. - PA | 5494 | PHLDLPHZN4 | PA |
| 2001-08-02 | 267-638 | 1XXX2XXX4XXX5XXX6XXX7XXX8XXX · 4 holders which blocks → | NETCARRIER TELECOM, INC. - PA | 5494 | LANSDALE | PA |
| 2001-08-02 | 267-662 | 1XXX2XXX3XXX4XXX5XXX6XXX7XXX8XXX9XXX · 4 holders which blocks → | NETCARRIER TELECOM, INC. - PA | 5494 | NORTHWALES | PA |
| 2001-08-02 | 267-864 | 1XXX2XXX4XXX6XXX7XXX8XXX9XXX · 4 holders which blocks → | NETCARRIER TELECOM, INC. - PA | 5494 | DOYLESTOWN | PA |
| — | 267-236 | 2XXX3XXX4XXX5XXX6XXX8XXX9XXX which blocks → | NETCARRIER TELECOM, INC. - PA | 5494 | PHLDLPHZN1 | PA |
| — | 267-296 | 0XXX1XXX2XXX3XXX4XXX5XXX6XXX8XXX9XXX · 3 holders which blocks → | NETCARRIER TELECOM, INC. - PA | 5494 | PHLDLPHZN2 | PA |
| — | 267-447 | 0XXX1XXX2XXX3XXX4XXX5XXX6XXX8XXX9XXX · 5 holders which blocks → | NETCARRIER TELECOM, INC. - PA | 5494 | PHPHSBZN32 | PA |
| — | 267-642 | 0XXX1XXX2XXX3XXX4XXX5XXX6XXX8XXX9XXX · 5 holders which blocks → | NETCARRIER TELECOM, INC. - PA | 5494 | LANSDALE | PA |
| — | 267-652 | 0XXX1XXX2XXX3XXX4XXX5XXX6XXX8XXX9XXX · 4 holders which blocks → | NETCARRIER TELECOM, INC. - PA | 5494 | NORTHWALES | PA |
| — | 267-753 | 0XXX2XXX3XXX4XXX5XXX6XXX7XXX8XXX9XXX · 5 holders which blocks → | NETCARRIER TELECOM, INC. - PA | 5494 | NEWTOWN | PA |
| — | 267-991 | 0XXX1XXX2XXX3XXX4XXX5XXX6XXX8XXX9XXX · 5 holders which blocks → | NETCARRIER TELECOM, INC. - PA | 5494 | PHPHSBZN40 | PA |
Source: NANPA CO Code Assignments (Utilized, All States, Public), file date 09/19/2026 — Tier A primary source, refreshed on every import. Viewing is free; bulk downloads require a membership.