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 |
|---|---|---|---|---|---|---|
| 2018-10-04 | 616-287 | 0–9 XXXall 10 · 2 holders which blocks → | TELNET WORLDWIDE, INC. | 817J | GRAND RPDS | MI |
| 2018-07-13 | 616-256 | 0–9 XXXall 10 · 6 holders which blocks → | TELNET WORLDWIDE, INC. | 817J | GRAND RPDS | MI |
| 2016-10-12 | 616-265 | 0–9 XXXall 10 · 5 holders which blocks → | TELNET WORLDWIDE, INC. | 817J | GRAND RPDS | MI |
| 2004-12-06 | 616-205 | 0–9 XXXall 10 · 8 holders which blocks → | TELNET WORLDWIDE, INC. | 817J | SPARTA | MI |
| 2004-12-06 | 616-757 | 0XXX1XXX2XXX3XXX4XXX5XXX6XXX7XXX8XXX · 5 holders which blocks → | TELNET WORLDWIDE, INC. | 817J | BORCULO | MI |
| 2004-12-06 | 616-986 | 0XXX1XXX5XXX6XXX8XXX · 5 holders which blocks → | TELNET WORLDWIDE, INC. | 817J | ALLENDALE | MI |
| 2004-11-17 | 616-277 | 0–9 XXXall 10 · 8 holders which blocks → | TELNET WORLDWIDE, INC. | 817J | BYRON CTR | MI |
| 2002-01-16 | 616-237 | not yet reported which blocks → | TELNET WORLDWIDE, INC. | 817J | ZEELAND | MI |
| 2001-05-08 | 616-839 | not yet reported which blocks → | TELNET WORLDWIDE, INC. | 817J | CLARKSVL | MI |
| 2001-01-10 | 616-825 | not yet reported which blocks → | TELNET WORLDWIDE, INC. | 817J | ADA | MI |
| — | 616-582 | not yet reported which blocks → | TELNET WORLDWIDE, INC. | 817J | HOLLAND | MI |
| — | 616-588 | not yet reported which blocks → | TELNET WORLDWIDE, INC. | 817J | GRAND RPDS | MI |
| — | 616-619 | not yet reported which blocks → | TELNET WORLDWIDE, INC. | 817J | GREENVILLE | MI |
| — | 616-743 | not yet reported which blocks → | TELNET WORLDWIDE, INC. | 817J | GRANDHAVEN | MI |
| — | 616-775 | not yet reported which blocks → | TELNET WORLDWIDE, INC. | 817J | IONIA | MI |
| — | 616-829 | not yet reported which blocks → | TELNET WORLDWIDE, INC. | 817J | CEDAR SPG | 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.