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 |
|---|---|---|---|---|---|---|
| 2021-02-05 | 618-642 | 0XXX1XXX2XXX3XXX6XXX7XXX8XXX9XXX · 5 holders which blocks → | MCC NETWORK SERVICES, LLC | 075A | GREENVILLE | IL |
| 2009-05-20 | 618-429 | 0–9 XXXall 10 · 3 holders which blocks → | MCC NETWORK SERVICES, LLC | 9915 | OLNEY | IL |
| 2007-06-05 | 618-762 | 0–9 XXXall 10 · 7 holders which blocks → | MCC NETWORK SERVICES, LLC | 075A | WALTONVL | IL |
| 2007-06-05 | 618-899 | 0XXX1XXX2XXX3XXX4XXX5XXX6XXX7XXX9XXX · 5 holders which blocks → | MCC NETWORK SERVICES, LLC | 075A | MT VERNON | IL |
| 2006-12-21 | 618-448 | 0XXX1XXX4XXX5XXX6XXX7XXX8XXX9XXX · 6 holders which blocks → | MCC NETWORK SERVICES, LLC | 9915 | MASCOUTAH | IL |
| 2002-06-11 | 618-379 | none assigned yet which blocks → | MCC NETWORK SERVICES, LLC | 9915 | NORRISCITY | IL |
| 2002-06-11 | 618-380 | 0XXX1XXX3XXX4XXX6XXX · 3 holders which blocks → | MCC NETWORK SERVICES, LLC | 9915 | CARMI | IL |
| — | 618-294 | 0XXX1XXX2XXX3XXX4XXX5XXX6XXX7XXX · 4 holders which blocks → | MCC NETWORK SERVICES, LLC | 9915 | HARRISBURG | IL |
| — | 618-297 | 0XXX1XXX3XXX4XXX5XXX6XXX7XXX8XXX · 4 holders which blocks → | MCC NETWORK SERVICES, LLC | 9915 | ELDORADO | IL |
| — | 618-519 | 0XXX1XXX2XXX3XXX4XXX5XXX6XXX7XXX8XXX · 3 holders which blocks → | MCC NETWORK SERVICES, LLC | 9915 | CARBONDALE | IL |
| — | 618-956 | 0XXX1XXX7XXX · 2 holders which blocks → | MCC NETWORK SERVICES, LLC | 9915 | CARTERVL | IL |
| — | 618-969 | 0XXX1XXX2XXX3XXX4XXX5XXX6XXX7XXX · 6 holders which blocks → | MCC NETWORK SERVICES, LLC | 9915 | MARION | IL |
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.