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 |
|---|---|---|---|---|---|---|
| — | 567-269 | not yet reported which blocks → | BANDWIDTH.COM CLEC, LLC - OH | 001F | CLYDE | OH |
| — | 567-270 | not yet reported which blocks → | BANDWIDTH.COM CLEC, LLC - OH | 001F | LOUDONVL | OH |
| — | 567-273 | not yet reported which blocks → | BANDWIDTH.COM CLEC, LLC - OH | 001F | NEWWSHNGTN | OH |
| — | 567-284 | 0–9 XXXall 10 · 4 holders which blocks → | T-MOBILE USA, INC. | 6529 | ASHLAND | OH |
| — | 567-311 | not yet reported which blocks → | MULTIPLE OCN LISTING | MULT | XXXXXXXXXX | OH |
| — | 567-321 | 0–9 XXXall 10 · 7 holders which blocks → | CENTURYLINK COMMUNICATIONS, LLC | 508J | NEWWSHNGTN | OH |
| — | 567-337 | 0–9 XXXall 10 · 7 holders which blocks → | TON80 COMMUNICATIONS, LLC | 516J | BRYAN | OH |
| — | 567-338 | 0XXX1XXX2XXX3XXX4XXX5XXX6XXX8XXX9XXX · 3 holders which blocks → | ONVOY, LLC - OH | 464C | BUCYRUS | OH |
| — | 567-345 | 0–9 XXXall 10 · 5 holders which blocks → | TELNYX LLC | 073H | MANSFIELD | OH |
| — | 567-354 | 0XXX1XXX2XXX4XXX5XXX8XXX · 4 holders which blocks → | TWILIO INTERNATIONAL, INC. | 506J | CONVOY | OH |
| — | 567-361 | 0XXX1XXX2XXX3XXX4XXX6XXX7XXX8XXX9XXX · 4 holders which blocks → | TWILIO INTERNATIONAL, INC. | 506J | NEWWNCHSTR | OH |
| — | 567-363 | 0–9 XXXall 10 · 5 holders which blocks → | TWILIO INTERNATIONAL, INC. | 506J | HOLLAND | OH |
| — | 567-392 | 0–9 XXXall 10 · 2 holders which blocks → | NUSO, LLC | 732J | LIMA | OH |
| — | 567-411 | not yet reported which blocks → | MULTIPLE OCN LISTING | MULT | XXXXXXXXXX | OH |
| — | 567-442 | 0XXX1XXX2XXX3XXX4XXX5XXX6XXX8XXX9XXX · 4 holders which blocks → | TELNYX LLC | 073H | FOSTORIA | OH |
| — | 567-497 | not yet reported which blocks → | CELLCO PARTNERSHIP DBA VERIZON WIRELESS - OH | 6025 | CHESTERVL | OH |
| — | 567-511 | not yet reported which blocks → | MULTIPLE OCN LISTING | MULT | XXXXXXXXXX | OH |
| — | 567-522 | 0XXX1XXX2XXX5XXX7XXX8XXX · 4 holders which blocks → | TELNYX LLC | 073H | MARBLEHEAD | OH |
| — | 567-525 | 0–9 XXXall 10 · 6 holders which blocks → | CELLCO PARTNERSHIP DBA VERIZON WIRELESS - OH | 6025 | FINDLAY | OH |
| — | 567-555 | not yet reported which blocks → | MULTIPLE OCN LISTING | MULT | DIR ASST | OH |
| — | 567-611 | not yet reported which blocks → | MULTIPLE OCN LISTING | MULT | XXXXXXXXXX | OH |
| — | 567-661 | not yet reported which blocks → | ONVOY, LLC - OH | 464C | TOLEDO | OH |
| — | 567-666 | 0–9 XXXall 10 · 5 holders which blocks → | VONAGE AMERICA LLC | 197D | TOLEDO | OH |
| — | 567-686 | 0–9 XXXall 10 · 4 holders which blocks → | METROPCS, INC. | 5562 | TOLEDO | OH |
| — | 567-700 | not yet reported which blocks → | OH | |||
| — | 567-711 | not yet reported which blocks → | MULTIPLE OCN LISTING | MULT | XXXXXXXXXX | OH |
| — | 567-811 | not yet reported which blocks → | MULTIPLE OCN LISTING | MULT | XXXXXXXXXX | OH |
| — | 567-867 | not yet reported which blocks → | BANDWIDTH.COM CLEC, LLC - OH | 001F | SANDUSKY | OH |
| — | 567-881 | 8XXX9XXX · 2 holders which blocks → | MCC TELEPHONY OF THE MIDWEST, LLC - OH | 047G | HICKSVILLE | OH |
| — | 567-911 | not yet reported which blocks → | MULTIPLE OCN LISTING | MULT | XXXXXXXXXX | OH |
| — | 567-950 | not yet reported which blocks → | OH | |||
| — | 567-958 | not yet reported which blocks → | OH | |||
| — | 567-959 | not yet reported which blocks → | OH | |||
| — | 567-976 | not yet reported which blocks → | MULTIPLE OCN LISTING | MULT | XXXXXXXXXX | OH |
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.