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 |
|---|---|---|---|---|---|---|
| 2017-09-21 | 260-250 | 0–9 XXXall 10 · 3 holders which blocks → | MCC TELEPHONY OF THE MID-WEST, LLC - IN | 874F | MONROEVL | IN |
| 2010-06-10 | 260-277 | 0–9 XXXall 10 · 6 holders which blocks → | MCC TELEPHONY OF THE MID-WEST, LLC - IN | 874F | HARLAN | IN |
| 2010-06-10 | 260-286 | 0–9 XXXall 10 · 5 holders which blocks → | MCC TELEPHONY OF THE MID-WEST, LLC - IN | 874F | CHURUBUSCO | IN |
| 2010-06-10 | 260-297 | 0–9 XXXall 10 · 6 holders which blocks → | MCC TELEPHONY OF THE MID-WEST, LLC - IN | 874F | OSSIAN | IN |
| 2010-05-24 | 260-365 | 0XXX1XXX5XXX7XXX8XXX · 4 holders which blocks → | MCC TELEPHONY OF THE MID-WEST, LLC - IN | 874F | HOWE | IN |
| 2010-05-19 | 260-296 | 0–9 XXXall 10 · 3 holders which blocks → | MCC TELEPHONY OF THE MID-WEST, LLC - IN | 874F | BLUFFTON | IN |
| 2008-03-13 | 260-256 | 0XXX1XXX2XXX3XXX8XXX9XXX · 2 holders which blocks → | MCC TELEPHONY OF THE MID-WEST, LLC - IN | 874F | CRAIGVILLE | IN |
| 2006-06-19 | 260-626 | 0XXX1XXX2XXX6XXX7XXX8XXX · 4 holders which blocks → | MCC TELEPHONY OF THE MID-WEST, LLC - IN | 874F | PLEASANTML | IN |
| 2006-05-20 | 260-533 | 3XXX which blocks → | MCC TELEPHONY OF THE MID-WEST, LLC - IN | 874F | HOWE | IN |
| — | 260-262 | 0XXX2XXX · 2 holders which blocks → | MCC TELEPHONY OF THE MID-WEST, LLC - IN | 874F | LIBERTYCTR | IN |
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.