NumberResearchRecent prefix assignments
0 prefixes assigned in the last 30 days · from the daily NANPA CO code file, 09/19/2026
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 |
|---|---|---|---|---|---|---|
| 2024-01-18 | 608-914 | 0–9 XXXwhole prefix which blocks → | TELEPORT COMMUNICATIONS AMERICA, LLC WI | 7216 | MADISON | WI |
| 2024-01-18 | 608-915 | 0–9 XXXwhole prefix which blocks → | TELEPORT COMMUNICATIONS AMERICA, LLC WI | 7216 | MADISON | WI |
| 2024-01-18 | 608-916 | 0–9 XXXwhole prefix which blocks → | TELEPORT COMMUNICATIONS AMERICA, LLC WI | 7216 | MADISON | WI |
| 2022-01-08 | 608-508 | 0XXX1XXX2XXX5XXX6XXX7XXX8XXX9XXX · 7 holders which blocks → | TELEPORT COMMUNICATIONS AMERICA, LLC WI | 7216 | WESTFIELD | WI |
| 2019-08-01 | 608-570 | 0XXX1XXX2XXX4XXX5XXX6XXX7XXX8XXX9XXX · 5 holders which blocks → | TELEPORT COMMUNICATIONS AMERICA, LLC WI | 7216 | RICHLD CTR | WI |
| 2019-04-11 | 608-602 | 1XXX2XXX3XXX4XXX5XXX6XXX7XXX8XXX9XXX · 3 holders which blocks → | TELEPORT COMMUNICATIONS AMERICA, LLC WI | 7216 | WAUNAKEE | WI |
| 2018-06-25 | 608-802 | 0–9 XXXall 10 · 3 holders which blocks → | TELEPORT COMMUNICATIONS AMERICA, LLC WI | 7216 | BELOIT | WI |
| 2016-06-09 | 608-720 | 0–9 XXXall 10 · 5 holders which blocks → | TELEPORT COMMUNICATIONS AMERICA, LLC WI | 7216 | MADISON | WI |
| 2016-03-23 | 608-384 | 0XXX2XXX3XXX4XXX5XXX6XXX7XXX8XXX9XXX · 5 holders which blocks → | TELEPORT COMMUNICATIONS AMERICA, LLC WI | 7216 | MINERAL PT | WI |
| 2016-01-25 | 608-591 | 0–9 XXXall 10 · 5 holders which blocks → | TELEPORT COMMUNICATIONS AMERICA, LLC WI | 7216 | LODI | WI |
| 2016-01-22 | 608-975 | 1XXX2XXX3XXX4XXX5XXX6XXX7XXX8XXX · 5 holders which blocks → | TELEPORT COMMUNICATIONS AMERICA, LLC WI | 7216 | BELLEVILLE | WI |
| 2014-10-06 | 608-440 | 0–9 XXXall 10 · 6 holders which blocks → | TELEPORT COMMUNICATIONS AMERICA, LLC WI | 7216 | MADISON | WI |
| 2009-10-14 | 608-501 | 0–9 XXXall 10 · 3 holders which blocks → | TELEPORT COMMUNICATIONS AMERICA, LLC WI | 7216 | STOUGHTON | WI |
| 2003-05-07 | 608-473 | 1XXX2XXX3XXX4XXX5XXX6XXX7XXX8XXX9XXX · 2 holders which blocks → | TELEPORT COMMUNICATIONS AMERICA, LLC WI | 7216 | BELOIT | WI |
| — | 608-234 | 0XXX1XXX2XXX3XXX4XXX5XXX7XXX8XXX · 2 holders which blocks → | TELEPORT COMMUNICATIONS AMERICA, LLC WI | 7216 | MADISON | WI |
| — | 608-237 | 1XXX2XXX3XXX4XXX6XXX7XXX8XXX which blocks → | TELEPORT COMMUNICATIONS AMERICA, LLC WI | 7216 | MADISON | WI |
| — | 608-316 | 0XXX1XXX2XXX3XXX4XXX5XXX6XXX7XXX8XXX · 3 holders which blocks → | TELEPORT COMMUNICATIONS AMERICA, LLC WI | 7216 | MADISON | WI |
| — | 608-354 | 1XXX2XXX3XXX4XXX5XXX6XXX7XXX8XXX9XXX which blocks → | TELEPORT COMMUNICATIONS AMERICA, LLC WI | 7216 | MADISON | WI |
| — | 608-728 | 0XXX1XXX2XXX3XXX4XXX5XXX6XXX7XXX8XXX · 3 holders which blocks → | TELEPORT COMMUNICATIONS AMERICA, LLC WI | 7216 | JANESVILLE | WI |
Source: NANPA CO Code Assignments (Utilized, All States, Public), file date 09/19/2026 — Tier A primary source, refreshed on every import. Viewing is free; bulk downloads require a membership.