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 |
|---|---|---|---|---|---|---|
| 2022-03-18 | 608-939 | 1XXX3XXX9XXX · 3 holders which blocks → | TON80 COMMUNICATIONS, LLC | 516J | MONROE CTR | WI |
| 2022-03-18 | 608-995 | 0XXX1XXX2XXX3XXX5XXX8XXX9XXX · 2 holders which blocks → | TON80 COMMUNICATIONS, LLC | 516J | VERONA | WI |
| 2022-03-07 | 608-840 | 0XXX2XXX8XXX · 3 holders which blocks → | TON80 COMMUNICATIONS, LLC | 516J | MONTICELLO | WI |
| 2022-03-03 | 608-760 | 0XXX8XXX · 2 holders which blocks → | TON80 COMMUNICATIONS, LLC | 516J | TREMPEALEU | WI |
| 2022-03-03 | 608-869 | 0XXX1XXX8XXX · 2 holders which blocks → | TON80 COMMUNICATIONS, LLC | 516J | LODI | WI |
| 2022-03-01 | 608-978 | 8XXX which blocks → | TON80 COMMUNICATIONS, LLC | 516J | MARSHALL | WI |
| 2022-02-28 | 608-880 | 0XXX8XXX · 2 holders which blocks → | TON80 COMMUNICATIONS, LLC | 516J | WITWEN | WI |
| 2022-02-28 | 608-998 | 8XXX9XXX · 2 holders which blocks → | TON80 COMMUNICATIONS, LLC | 516J | VIOLA | WI |
| 2022-02-24 | 608-992 | 2XXX9XXX · 2 holders which blocks → | TON80 COMMUNICATIONS, LLC | 516J | SABIN | WI |
| 2022-02-24 | 608-997 | 4XXX7XXX9XXX · 3 holders which blocks → | TON80 COMMUNICATIONS, LLC | 516J | WAUNAKEE | WI |
| 2022-02-17 | 608-878 | 0XXX7XXX8XXX · 3 holders which blocks → | TON80 COMMUNICATIONS, LLC | 516J | STEUBEN | WI |
| 2022-02-17 | 608-908 | 9XXX which blocks → | TON80 COMMUNICATIONS, LLC | 516J | WAUMANDEE | WI |
| 2022-02-17 | 608-936 | 0XXX2XXX · 2 holders which blocks → | TON80 COMMUNICATIONS, LLC | 516J | WAUZEKA | WI |
| 2022-02-17 | 608-945 | 0XXX4XXX · 2 holders which blocks → | TON80 COMMUNICATIONS, LLC | 516J | MOUNT ZION | WI |
| 2022-02-17 | 608-947 | 3XXX which blocks → | TON80 COMMUNICATIONS, LLC | 516J | LIBETYPOLE | WI |
| 2022-02-17 | 608-969 | 1XXX6XXX9XXX · 3 holders which blocks → | TON80 COMMUNICATIONS, LLC | 516J | WIOTA | WI |
| 2022-01-27 | 608-932 | 7XXX which blocks → | TON80 COMMUNICATIONS, LLC | 516J | LA VALLE | WI |
| 2022-01-14 | 608-913 | 7XXX which blocks → | TON80 COMMUNICATIONS, LLC | 516J | COCHRANE | WI |
| 2022-01-14 | 608-926 | 1XXX2XXX · 2 holders which blocks → | TON80 COMMUNICATIONS, LLC | 516J | ENDEAVOR | WI |
| 2022-01-14 | 608-942 | 1XXX6XXX · 2 holders which blocks → | TON80 COMMUNICATIONS, LLC | 516J | CAZENOVIA | WI |
| 2021-04-12 | 608-746 | 0–9 XXXall 10 · 6 holders which blocks → | TON80 COMMUNICATIONS, LLC | 516J | JANESVILLE | WI |
| — | 608-551 | 0XXX1XXX2XXX3XXX5XXX6XXX7XXX · 7 holders which blocks → | TON80 COMMUNICATIONS, LLC | 516J | BRODHEAD | WI |
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.