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 |
|---|---|---|---|---|---|---|
| — | 248-772 | 0–9 XXXall 10 · 2 holders which blocks → | NEW CINGULAR WIRELESS PCS, LLC - IL | 6534 | FARMINGTON | MI |
| — | 248-797 | not yet reported which blocks → | NEW CINGULAR WIRELESS PCS, LLC - IL | 6534 | ROYAL OAK | MI |
| — | 248-818 | 1XXX2XXX3XXX4XXX5XXX6XXX7XXX8XXX9XXX which blocks → | NEW CINGULAR WIRELESS PCS, LLC - IL | 6534 | PONTIAC | MI |
| — | 248-821 | not yet reported which blocks → | NEW CINGULAR WIRELESS PCS, LLC - IL | 6534 | PONTIAC | MI |
| — | 248-877 | not yet reported which blocks → | NEW CINGULAR WIRELESS PCS, LLC - IL | 6534 | PONTIAC | MI |
| — | 248-881 | 2XXX3XXX4XXX6XXX7XXX8XXX9XXX · 2 holders which blocks → | NEW CINGULAR WIRELESS PCS, LLC - IL | 6534 | PONTIAC | MI |
| — | 248-882 | not yet reported which blocks → | NEW CINGULAR WIRELESS PCS, LLC - IL | 6534 | PONTIAC | MI |
| — | 248-884 | not yet reported which blocks → | NEW CINGULAR WIRELESS PCS, LLC - IL | 6534 | PONTIAC | MI |
| — | 248-890 | not yet reported which blocks → | NEW CINGULAR WIRELESS PCS, LLC - IL | 6534 | ROYAL OAK | MI |
| — | 248-892 | not yet reported which blocks → | NEW CINGULAR WIRELESS PCS, LLC - IL | 6534 | PONTIAC | MI |
| — | 248-909 | not yet reported which blocks → | NEW CINGULAR WIRELESS PCS, LLC - IL | 6534 | PONTIAC | MI |
| — | 248-916 | 0–9 XXXall 10 · 3 holders which blocks → | NEW CINGULAR WIRELESS PCS, LLC - IL | 6534 | NORTHVILLE | MI |
| — | 248-931 | not yet reported which blocks → | NEW CINGULAR WIRELESS PCS, LLC - IL | 6534 | PONTIAC | MI |
| — | 248-933 | not yet reported which blocks → | NEW CINGULAR WIRELESS PCS, LLC - IL | 6534 | PONTIAC | MI |
| — | 248-961 | 5XXX6XXX7XXX8XXX9XXX which blocks → | NEW CINGULAR WIRELESS PCS, LLC - IL | 6534 | PONTIAC | MI |
| — | 248-977 | 1XXX3XXX4XXX5XXX6XXX7XXX8XXX9XXX · 2 holders which blocks → | NEW CINGULAR WIRELESS PCS, LLC - IL | 6534 | PONTIAC | MI |
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.