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 |
|---|---|---|---|---|---|---|
| 2015-11-04 | 860-900 | 0–9 XXXall 10 · 3 holders which blocks → | PEERLESS NETWORK OF CONNECTICUT, LLC - CT | 539F | HARTFORD | CT |
| 2013-04-11 | 860-390 | 0XXX1XXX2XXX3XXX4XXX5XXX6XXX8XXX9XXX · 5 holders which blocks → | PEERLESS NETWORK OF CONNECTICUT, LLC - CT | 539F | LYME | CT |
| 2013-04-11 | 860-400 | 0–9 XXXall 10 · 8 holders which blocks → | PEERLESS NETWORK OF CONNECTICUT, LLC - CT | 539F | LEDYARD | CT |
| 2013-04-11 | 860-407 | 0–9 XXXall 10 · 5 holders which blocks → | PEERLESS NETWORK OF CONNECTICUT, LLC - CT | 539F | JEWETTCITY | CT |
| 2013-04-11 | 860-744 | 0–9 XXXall 10 · 6 holders which blocks → | PEERLESS NETWORK OF CONNECTICUT, LLC - CT | 539F | CLINTON | CT |
| 2012-11-20 | 860-800 | 0–9 XXXall 10 · 5 holders which blocks → | PEERLESS NETWORK OF CONNECTICUT, LLC - CT | 539F | NORWICH | CT |
| 2012-11-20 | 860-999 | 0–9 XXXall 10 · 3 holders which blocks → | PEERLESS NETWORK OF CONNECTICUT, LLC - CT | 539F | HARTFORD | CT |
| 2010-03-19 | 860-955 | 0–9 XXXall 10 · 3 holders which blocks → | PEERLESS NETWORK OF CONNECTICUT, LLC - CT | 539F | HARTFORD | CT |
| 2006-03-17 | 860-971 | 0–9 XXXall 10 · 5 holders which blocks → | PEERLESS NETWORK OF CONNECTICUT, LLC - CT | 539F | STAFFD SPG | CT |
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.