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.
| Assigned | NPA-NXX | Thousands-blocks taken (last-4 opening) | Code holder | OCN | Rate center | State |
|---|---|---|---|---|---|---|
| 2018-06-04 | 267-842 | 0–9 XXXwhole prefix which blocks → | CORE COMMUNICATIONS, INC. - PA | 3806 | DOYLESTOWN | PA |
| 2002-07-09 | 267-776 | 1XXX2XXX3XXX4XXX5XXX6XXX7XXX8XXX9XXX · 5 holders which blocks → | CORE COMMUNICATIONS, INC. - PA | 3806 | PHLDLPHZN2 | PA |
| 2002-05-30 | 267-477 | 1XXX2XXX3XXX4XXX5XXX6XXX7XXX8XXX9XXX · 5 holders which blocks → | CORE COMMUNICATIONS, INC. - PA | 3806 | LINELXNGTN | PA |
| — | 267-462 | 0–9 XXXall 10 · 6 holders which blocks → | CORE COMMUNICATIONS, INC. - PA | 3806 | PHPHSBZN33 | PA |
| — | 267-485 | 0–9 XXXall 10 · 5 holders which blocks → | CORE COMMUNICATIONS, INC. - PA | 3806 | PHPHSBZN45 | PA |
| — | 267-647 | 0–9 XXXall 10 · 5 holders which blocks → | CORE COMMUNICATIONS, INC. - PA | 3806 | LANSDALE | PA |
| — | 267-697 | 1XXX2XXX3XXX4XXX5XXX6XXX7XXX8XXX9XXX · 3 holders which blocks → | CORE COMMUNICATIONS, INC. - PA | 3806 | MORRISVL | PA |
| — | 267-714 | 1XXX2XXX3XXX4XXX5XXX6XXX7XXX8XXX9XXX · 4 holders which blocks → | CORE COMMUNICATIONS, INC. - PA | 3806 | NEW HOPE | PA |
| — | 267-782 | not yet reported which blocks → | CORE COMMUNICATIONS, INC. - PA | 3806 | PERKASIE | PA |
| — | 267-801 | not yet reported which blocks → | CORE COMMUNICATIONS, INC. - PA | 3806 | PHLDLPHZN1 | PA |
| — | 267-851 | 1XXX2XXX3XXX4XXX5XXX6XXX7XXX8XXX9XXX · 2 holders which blocks → | CORE COMMUNICATIONS, INC. - PA | 3806 | PHPHSBZN38 | PA |
| — | 267-912 | 1XXX2XXX3XXX4XXX5XXX6XXX7XXX8XXX9XXX · 5 holders which blocks → | CORE COMMUNICATIONS, INC. - PA | 3806 | PHPHSBZN40 | PA |
| — | 267-919 | 2XXX3XXX6XXX7XXX8XXX9XXX · 3 holders which blocks → | CORE COMMUNICATIONS, INC. - PA | 3806 | NEW HOPE | 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.