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 |
|---|---|---|---|---|---|---|
| 2013-12-24 | 919-591 | 0–9 XXXall 10 · 5 holders which blocks → | TWC IP ENABLED SERVICES, LLC | 793K | RAL DUR AP | NC |
| 2013-02-05 | 919-973 | 0–9 XXXall 10 · 6 holders which blocks → | TWC IP ENABLED SERVICES, LLC | 793K | DURHAM | NC |
| 2013-02-05 | 919-977 | 0–9 XXXall 10 · 2 holders which blocks → | TWC IP ENABLED SERVICES, LLC | 793K | RALEIGH | NC |
| 2011-10-06 | 919-908 | 0–9 XXXall 10 · 4 holders which blocks → | TWC IP ENABLED SERVICES, LLC | 793K | DURHAM | NC |
| 2011-02-17 | 919-322 | 0–9 XXXall 10 · 4 holders which blocks → | TWC IP ENABLED SERVICES, LLC | 793K | RALEIGH | NC |
| 2011-02-09 | 919-797 | 0–9 XXXall 10 · 3 holders which blocks → | TWC IP ENABLED SERVICES, LLC | 793K | DURHAM | NC |
| — | 919-803 | 0–9 XXXall 10 · 2 holders which blocks → | TWC IP ENABLED SERVICES, LLC | 793K | RALEIGH | NC |
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.