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 |
|---|---|---|---|---|---|---|
| — | 757-492 | not yet reported which blocks → | COMCAST IP PHONE, LLC | 318J | NRFOLKZON2 | VA |
| — | 757-534 | 5XXX6XXX8XXX9XXX · 2 holders which blocks → | COMCAST IP PHONE, LLC | 318J | NWPTNWSZN1 | VA |
| — | 757-606 | 0XXX4XXX5XXX6XXX7XXX8XXX9XXX · 3 holders which blocks → | COMCAST IP PHONE, LLC | 318J | NRFOLKZON3 | VA |
| — | 757-637 | 0XXX1XXX4XXX5XXX6XXX7XXX8XXX9XXX · 6 holders which blocks → | COMCAST IP PHONE, LLC | 318J | NWPTNWSZN2 | VA |
| — | 757-673 | 1XXX8XXX9XXX which blocks → | COMCAST IP PHONE, LLC | 318J | NRFOLKZON3 | VA |
| — | 757-688 | not yet reported which blocks → | COMCAST IP PHONE, LLC | 318J | NWPTNWSZN1 | VA |
| — | 757-689 | 1XXX2XXX3XXX4XXX5XXX6XXX7XXX8XXX9XXX · 3 holders which blocks → | COMCAST IP PHONE, LLC | 318J | NRFOLKZON4 | VA |
| — | 757-741 | 0XXX3XXX4XXX5XXX6XXX7XXX8XXX9XXX · 6 holders which blocks → | COMCAST IP PHONE, LLC | 318J | TOANO | VA |
| — | 757-764 | not yet reported which blocks → | COMCAST IP PHONE, LLC | 318J | NWPTNWSZN2 | VA |
| — | 757-788 | 0–9 XXXall 10 · 4 holders which blocks → | COMCAST IP PHONE, LLC | 318J | NWPTNWSZN2 | VA |
| — | 757-864 | 0XXX which blocks → | COMCAST IP PHONE, LLC | 318J | NWPTNWSZN2 | VA |
| — | 757-878 | not yet reported which blocks → | COMCAST IP PHONE, LLC | 318J | NWPTNWSZN3 | VA |
| — | 757-914 | 0–9 XXXall 10 · 4 holders which blocks → | COMCAST IP PHONE, LLC | 318J | WILLIAMSBG | VA |
| — | 757-917 | 0–9 XXXall 10 · 5 holders which blocks → | COMCAST IP PHONE, LLC | 318J | NRFOLKZON2 | VA |
| — | 757-935 | 0XXX1XXX2XXX3XXX4XXX5XXX6XXX7XXX8XXX · 5 holders which blocks → | COMCAST IP PHONE, LLC | 318J | SUFFOLK | VA |
| — | 757-961 | 0XXX1XXX2XXX3XXX4XXX5XXX6XXX7XXX8XXX which blocks → | COMCAST IP PHONE, LLC | 318J | NRFOLKZON2 | VA |
| — | 757-962 | 0XXX1XXX2XXX3XXX4XXX5XXX6XXX7XXX8XXX which blocks → | COMCAST IP PHONE, LLC | 318J | NRFOLKZON2 | VA |
| — | 757-963 | 2XXX3XXX4XXX5XXX6XXX7XXX8XXX9XXX which blocks → | COMCAST IP PHONE, LLC | 318J | NRFOLKZON2 | VA |
| — | 757-965 | 0XXX1XXX4XXX5XXX6XXX7XXX9XXX which blocks → | COMCAST IP PHONE, LLC | 318J | NRFOLKZON2 | VA |
| — | 757-966 | 0XXX1XXX2XXX3XXX4XXX5XXX6XXX7XXX8XXX · 4 holders which blocks → | COMCAST IP PHONE, LLC | 318J | NRFOLKZON3 | VA |
| — | 757-967 | 0XXX1XXX2XXX3XXX4XXX5XXX6XXX7XXX8XXX · 5 holders which blocks → | COMCAST IP PHONE, LLC | 318J | NRFOLKZON3 | VA |
| — | 757-968 | 0XXX1XXX2XXX3XXX4XXX6XXX7XXX8XXX9XXX · 3 holders which blocks → | COMCAST IP PHONE, LLC | 318J | NWPTNWSZN3 | VA |
| — | 757-969 | 0XXX2XXX3XXX4XXX5XXX6XXX7XXX8XXX9XXX · 2 holders which blocks → | COMCAST IP PHONE, LLC | 318J | NWPTNWSZN3 | VA |
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.