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 |
|---|---|---|---|---|---|---|
| 2013-10-03 | 978-321 | 0–9 XXXall 10 · 7 holders which blocks → | PEERLESS NETWORK OF MASSACHUSETTS, LLC - MA | 268F | WINCHENDON | MA |
| 2013-10-03 | 978-419 | 0XXX1XXX2XXX3XXX4XXX5XXX6XXX8XXX9XXX · 6 holders which blocks → | PEERLESS NETWORK OF MASSACHUSETTS, LLC - MA | 268F | TYNGSBORO | MA |
| 2013-10-03 | 978-708 | 0–9 XXXall 10 · 8 holders which blocks → | PEERLESS NETWORK OF MASSACHUSETTS, LLC - MA | 268F | GROTON | MA |
| 2012-11-19 | 978-999 | 0–9 XXXall 10 · 7 holders which blocks → | PEERLESS NETWORK OF MASSACHUSETTS, LLC - MA | 268F | ROCKPORT | MA |
| 2001-05-18 | 978-300 | 1XXX3XXX4XXX5XXX6XXX7XXX8XXX · 3 holders which blocks → | PEERLESS NETWORK OF MASSACHUSETTS, LLC - MA | 268F | TOWNSEND | MA |
| — | 978-315 | 1XXX5XXX6XXX7XXX9XXX · 3 holders which blocks → | PEERLESS NETWORK OF MASSACHUSETTS, LLC - MA | 268F | WILMINGTON | MA |
| — | 978-431 | 1XXX4XXX5XXX6XXX7XXX9XXX · 6 holders which blocks → | PEERLESS NETWORK OF MASSACHUSETTS, LLC - MA | 268F | LITTLETON | MA |
| — | 978-484 | 1XXX5XXX6XXX8XXX9XXX · 4 holders which blocks → | PEERLESS NETWORK OF MASSACHUSETTS, LLC - MA | 268F | ROWLEY | MA |
| — | 978-515 | 1XXX5XXX6XXX7XXX9XXX · 5 holders which blocks → | PEERLESS NETWORK OF MASSACHUSETTS, LLC - MA | 268F | GLOUCESTER | MA |
| — | 978-543 | 1XXX4XXX5XXX6XXX7XXX · 4 holders which blocks → | PEERLESS NETWORK OF MASSACHUSETTS, LLC - MA | 268F | NO READING | MA |
| — | 978-743 | 0XXX1XXX2XXX3XXX4XXX5XXX6XXX7XXX9XXX · 6 holders which blocks → | PEERLESS NETWORK OF MASSACHUSETTS, LLC - MA | 268F | PEPPERELL | MA |
| — | 978-791 | 1XXX5XXX6XXX7XXX9XXX · 2 holders which blocks → | PEERLESS NETWORK OF MASSACHUSETTS, LLC - MA | 268F | DANVERS | MA |
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.