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 |
|---|---|---|---|---|---|---|
| 2018-10-05 | 843-977 | 0–9 XXXall 10 · 2 holders which blocks → | ONVOY, LLC - SC | 548E | NICHOLS | SC |
| 2018-10-03 | 843-960 | 0–9 XXXall 10 · 2 holders which blocks → | ONVOY, LLC - SC | 548E | MCCOLL | SC |
| 2018-10-03 | 843-966 | 0–9 XXXall 10 · 2 holders which blocks → | ONVOY, LLC - SC | 548E | SOCIETY HL | SC |
| 2018-09-28 | 843-897 | 0XXX1XXX2XXX3XXX4XXX5XXX6XXX7XXX8XXX · 3 holders which blocks → | ONVOY, LLC - SC | 548E | BENNETTSVL | SC |
| 2018-09-28 | 843-932 | 0–9 XXXall 10 · 3 holders which blocks → | ONVOY, LLC - SC | 548E | GEORGETOWN | SC |
| 2018-09-28 | 843-938 | 0–9 XXXall 10 · 2 holders which blocks → | ONVOY, LLC - SC | 548E | HARTSVILLE | SC |
| 2018-09-20 | 843-905 | 0XXX2XXX3XXX4XXX5XXX6XXX7XXX8XXX9XXX · 2 holders which blocks → | ONVOY, LLC - SC | 548E | PAMPLICO | SC |
| 2017-04-24 | 843-666 | 0–9 XXXall 10 · 4 holders which blocks → | ONVOY, LLC - SC | 548E | CHARLESTON | SC |
| 2015-11-20 | 843-806 | 0–9 XXXall 10 · 4 holders which blocks → | ONVOY, LLC - SC | 548E | CHARLESTON | SC |
| 2015-03-13 | 843-790 | 0–9 XXXall 10 · 2 holders which blocks → | ONVOY, LLC - SC | 548E | CHARLESTON | SC |
| 2014-10-03 | 843-888 | 0–9 XXXall 10 · 3 holders which blocks → | ONVOY, LLC - SC | 548E | MTPLEASANT | SC |
| 2007-05-30 | 843-793 | 0–9 XXXall 10 · 4 holders which blocks → | ONVOY, LLC - SC | 548E | CHARLESTON | SC |
| — | 843-487 | 0XXX1XXX2XXX3XXX4XXX5XXX6XXX7XXX9XXX · 6 holders which blocks → | ONVOY, LLC - SC | 548E | DILLON | SC |
| — | 843-531 | 0–9 XXXall 10 · 3 holders which blocks → | ONVOY, LLC - SC | 548E | CHARLESTON | SC |
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.