NumberResearchRecent prefix assignments
1 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 |
|---|---|---|---|---|---|---|
| — | 660-928 | not yet reported which blocks → | HOLWAY TEL. CO. | 1929 | SKIDMORE | MO |
| — | 660-933 | none assigned yet which blocks → | NORTHEAST MISSOURI RURAL TEL. CO. | 1931 | OMAHA | MO |
| — | 660-935 | not yet reported which blocks → | HOLWAY TEL. CO. | 1929 | MAITLAND | MO |
| — | 660-937 | not yet reported which blocks → | GRAND RIVER MUTUAL TEL CO | 1888 | RAVENWOOD | MO |
| — | 660-938 | not yet reported which blocks → | GRAND RIVER MUTUAL TEL CO | 1888 | MEADVILLE | MO |
| — | 660-939 | not yet reported which blocks → | GRAND RIVER MUTUAL TEL CO | 1888 | GRAHAM | MO |
| — | 660-944 | not yet reported which blocks → | GRAND RIVER MUTUAL TEL CO | 1888 | CONCETNJCT | MO |
| — | 660-945 | none assigned yet which blocks → | NORTHEAST MISSOURI RURAL TEL. CO. | 1931 | ARBELA | MO |
| — | 660-946 | not yet reported which blocks → | GRAND RIVER MUTUAL TEL CO | 1888 | BROWNING | MO |
| — | 660-947 | none assigned yet which blocks → | NORTHEAST MISSOURI RURAL TEL. CO. | 1931 | UNIONVILLE | MO |
| — | 660-948 | 3XXX which blocks → | BRIGHTSPEED OF EAST MISSOURI, LLC | 1151 | REVERE | MO |
| — | 660-949 | not yet reported which blocks → | MARK TWAIN RURAL TEL. CO. | 1914 | GREENTOP | MO |
| — | 660-950 | not yet reported which blocks → | MO | |||
| — | 660-955 | 0XXX5XXX · 2 holders which blocks → | BANDWIDTH.COM CLEC, LLC - MO | 993E | DEEPWATER | MO |
| — | 660-958 | not yet reported which blocks → | MO | |||
| — | 660-959 | not yet reported which blocks → | MO | |||
| — | 660-960 | 0XXX1XXX · 2 holders which blocks → | BANDWIDTH.COM CLEC, LLC - MO | 993E | OTTERVILLE | MO |
| — | 660-963 | none assigned yet which blocks → | WINDSTREAM MISSOURI, INC. | 1885 | LACLEDE | MO |
| — | 660-964 | 4XXX8XXX · 2 holders which blocks → | ONVOY, LLC - MO | 093F | WAYLAND | MO |
| — | 660-968 | not yet reported which blocks → | MO | |||
| — | 660-972 | none assigned yet which blocks → | LEVEL 3 COMMUNICATIONS, LLC - MO | 4932 | NELSON | MO |
| — | 660-974 | 0XXX1XXX2XXX3XXX4XXX7XXX9XXX · 7 holders which blocks → | BANDWIDTH.COM CLEC, LLC - MO | 993E | COLE CAMP | MO |
| — | 660-975 | 0XXX1XXX5XXX8XXX9XXX · 4 holders which blocks → | ONVOY, LLC - MO | 093F | LA MONTE | MO |
| — | 660-976 | not yet reported which blocks → | MULTIPLE OCN LISTING | MULT | XXXXXXXXXX | MO |
| — | 660-977 | 7XXX which blocks → | LEVEL 3 COMMUNICATIONS, LLC - MO | 4932 | BUNCETON | MO |
| — | 660-978 | none assigned yet which blocks → | LEVEL 3 COMMUNICATIONS, LLC - MO | 4932 | PILOTGROVE | MO |
| — | 660-984 | not yet reported which blocks → | IAMO COMMUNICATIONS, INC. | 4401 | WESTBORO | MO |
| — | 660-986 | not yet reported which blocks → | GRAND RIVER MUTUAL TEL CO | 1888 | PARNELL | MO |
| — | 660-987 | 0XXX7XXX9XXX · 3 holders which blocks → | ONVOY, LLC - MO | 093F | WINDSOR | MO |
| — | 660-993 | not yet reported which blocks → | ROCK PORT TEL. CO. | 1942 | WATSON | MO |
| — | 660-994 | 6XXX which blocks → | TERRA NOVA TELECOM INC. | 145J | EDINA | MO |
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.