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 |
|---|---|---|---|---|---|---|
| 2022-03-24 | 970-809 | 0XXX1XXX7XXX8XXX · 3 holders which blocks → | TON80 COMMUNICATIONS, LLC | 516J | RDFTHERLKS | CO |
| 2022-03-16 | 970-525 | 0XXX2XXX3XXX4XXX5XXX7XXX · 3 holders which blocks → | TON80 COMMUNICATIONS, LLC | 516J | PAONIA | CO |
| 2022-03-10 | 970-979 | 0XXX1XXX2XXX7XXX8XXX9XXX · 5 holders which blocks → | TON80 COMMUNICATIONS, LLC | 516J | EDWARDS | CO |
| 2022-03-10 | 970-994 | 0XXX1XXX4XXX5XXX8XXX · 5 holders which blocks → | TON80 COMMUNICATIONS, LLC | 516J | OLATHE | CO |
| 2022-03-04 | 970-738 | 0XXX1XXX2XXX4XXX8XXX · 4 holders which blocks → | TON80 COMMUNICATIONS, LLC | 516J | NORWOOD | CO |
| 2022-03-04 | 970-969 | 6XXX9XXX · 2 holders which blocks → | TON80 COMMUNICATIONS, LLC | 516J | PAGOSA SPG | CO |
| 2022-03-03 | 970-543 | 0XXX3XXX7XXX8XXX · 4 holders which blocks → | TON80 COMMUNICATIONS, LLC | 516J | MESA | CO |
| 2022-03-03 | 970-995 | 0XXX1XXX2XXX3XXX4XXX5XXX6XXX7XXX8XXX · 4 holders which blocks → | TON80 COMMUNICATIONS, LLC | 516J | NEW CASTLE | CO |
| 2022-03-02 | 970-998 | 0XXX2XXX5XXX8XXX9XXX · 4 holders which blocks → | TON80 COMMUNICATIONS, LLC | 516J | MCCOY | CO |
| 2022-02-25 | 970-877 | 0XXX2XXX4XXX7XXX8XXX9XXX · 4 holders which blocks → | TON80 COMMUNICATIONS, LLC | 516J | LAKE CITY | CO |
| 2022-02-25 | 970-955 | 0XXX1XXX5XXX · 3 holders which blocks → | TON80 COMMUNICATIONS, LLC | 516J | MANCOS | CO |
| 2022-02-25 | 970-993 | 0XXX1XXX2XXX3XXX9XXX · 5 holders which blocks → | TON80 COMMUNICATIONS, LLC | 516J | MARVEL | CO |
| 2022-02-24 | 970-868 | 0XXX1XXX5XXX8XXX · 4 holders which blocks → | TON80 COMMUNICATIONS, LLC | 516J | HTSLPHRSPG | CO |
| 2022-02-24 | 970-997 | 0XXX1XXX2XXX3XXX5XXX6XXX8XXX · 7 holders which blocks → | TON80 COMMUNICATIONS, LLC | 516J | KREMMLING | CO |
| 2022-02-18 | 970-932 | 0–9 XXXall 10 · 5 holders which blocks → | TON80 COMMUNICATIONS, LLC | 516J | ESTES PARK | CO |
| 2022-02-18 | 970-996 | 0XXX1XXX2XXX3XXX4XXX5XXX6XXX7XXX · 4 holders which blocks → | TON80 COMMUNICATIONS, LLC | 516J | HAYDEN | CO |
| 2022-02-17 | 970-733 | 0XXX1XXX2XXX3XXX6XXX7XXX8XXX9XXX · 6 holders which blocks → | TON80 COMMUNICATIONS, LLC | 516J | DOLORES | CO |
| 2022-02-17 | 970-992 | 0XXX1XXX2XXX8XXX9XXX · 5 holders which blocks → | TON80 COMMUNICATIONS, LLC | 516J | DOVE CREEK | CO |
| 2022-01-13 | 970-937 | 0XXX1XXX2XXX3XXX4XXX6XXX · 4 holders which blocks → | TON80 COMMUNICATIONS, LLC | 516J | DE BEQUE | CO |
| 2022-01-11 | 970-727 | 0XXX2XXX5XXX8XXX · 4 holders which blocks → | TON80 COMMUNICATIONS, LLC | 516J | CRESTEDBTE | CO |
| 2022-01-11 | 970-935 | 0XXX1XXX2XXX3XXX6XXX8XXX · 6 holders which blocks → | TON80 COMMUNICATIONS, LLC | 516J | BRECKENRDG | CO |
| 2020-09-24 | 970-837 | 0–9 XXXall 10 · 5 holders which blocks → | TON80 COMMUNICATIONS, LLC | 516J | FT COLLINS | CO |
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.