NumberResearchRecent prefix assignments
372 prefixes assigned in the last 30 days · from the daily NANPA CO code file, 09/30/2026
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.
Most active assignees, last 30 days
New assignments by month
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Dec 2025
Nov 2025
Quick find in this area code:
| Assigned | NPA-NXX | Thousands-blocks taken (last-4 opening) | Code holder | OCN | Rate center | State |
|---|---|---|---|---|---|---|
| — | 563-940 | not yet reported which blocks → | CELLCO PARTNERSHIP DBA VERIZON WIRELESS - IA | 6570 | DAVENPORT | IA |
| — | 563-941 | not yet reported which blocks → | F&B COMMUNICATIONS, INC. - IA | 4245 | LOWDEN | IA |
| — | 563-942 | not yet reported which blocks → | CEDAR COMMUNICATIONS, LLC | 4796 | STANWOOD | IA |
| — | 563-944 | 0XXX3XXX4XXX6XXX8XXX9XXX · 5 holders which blocks → | WINDSTREAM IOWA COMMUNICATIONS, INC. - SYSTEMS | 1170 | LOWDEN | IA |
| — | 563-945 | 2XXX4XXX5XXX7XXX · 3 holders which blocks → | WINDSTREAM IOWA COMMUNICATIONS, INC. - SYSTEMS | 1170 | STANWOOD | IA |
| — | 563-946 | 4XXX5XXX6XXX7XXX9XXX · 4 holders which blocks → | WINDSTREAM IOWA COMMUNICATIONS, INC. - SYSTEMS | 1170 | ROCHESTER | IA |
| — | 563-949 | 0XXX1XXX2XXX3XXX4XXX5XXX7XXX8XXX9XXX · 4 holders which blocks → | UNITED STATES CELLULAR - IA | 6266 | DAVENPORT | IA |
| — | 563-950 | not yet reported which blocks → | IA | |||
| — | 563-958 | not yet reported which blocks → | MULTIPLE OCN LISTING | MULT | IA | |
| — | 563-959 | not yet reported which blocks → | MULTIPLE OCN LISTING | MULT | IA | |
| — | 563-964 | 5XXX which blocks → | ALPINE COMMUNICATIONS, L.C. | 1106 | GARNAVILLO | IA |
| — | 563-976 | not yet reported which blocks → | MULTIPLE OCN LISTING | MULT | XXXXXXXXXX | IA |
| — | 563-988 | not yet reported which blocks → | IA | |||
| — | 563-999 | not yet reported which blocks → | LOUISA COMMUNICATIONS, LC - IA | 4650 | MUSCATINE | IA |
| — | 564-211 | not yet reported which blocks → | MULTIPLE OCN LISTING | MULT | XXXXXXXXXX | WA |
| — | 564-213 | 0–9 XXXall 10 · 5 holders which blocks → | ONVOY, LLC - WA | 483E | WHATCOMCTY | WA |
| — | 564-311 | not yet reported which blocks → | MULTIPLE OCN LISTING | MULT | XXXXXXXXXX | WA |
| — | 564-411 | not yet reported which blocks → | MULTIPLE OCN LISTING | MULT | XXXXXXXXXX | WA |
| — | 564-511 | not yet reported which blocks → | MULTIPLE OCN LISTING | MULT | XXXXXXXXXX | WA |
| — | 564-555 | not yet reported which blocks → | MULTIPLE OCN LISTING | MULT | DIR ASST | WA |
| — | 564-583 | not yet reported which blocks → | WA | |||
| — | 564-611 | not yet reported which blocks → | MULTIPLE OCN LISTING | MULT | XXXXXXXXXX | WA |
| — | 564-700 | not yet reported which blocks → | WA | |||
| — | 564-711 | not yet reported which blocks → | MULTIPLE OCN LISTING | MULT | XXXXXXXXXX | WA |
| — | 564-811 | not yet reported which blocks → | MULTIPLE OCN LISTING | MULT | XXXXXXXXXX | WA |
| — | 564-911 | not yet reported which blocks → | MULTIPLE OCN LISTING | MULT | XXXXXXXXXX | WA |
| — | 564-950 | not yet reported which blocks → | WA | |||
| — | 564-958 | not yet reported which blocks → | WA | |||
| — | 564-959 | not yet reported which blocks → | WA | |||
| — | 564-976 | not yet reported which blocks → | WA | |||
| — | 567-207 | 0–9 XXXall 10 · 5 holders which blocks → | LEVEL 3 COMMUNICATIONS, LLC - OH | 4863 | TIFFIN | OH |
| — | 567-211 | not yet reported which blocks → | MULTIPLE OCN LISTING | MULT | XXXXXXXXXX | OH |
| — | 567-213 | 0–9 XXXall 10 · 4 holders which blocks → | CELLCO PARTNERSHIP DBA VERIZON WIRELESS - OH | 6025 | BOWLNGGREN | OH |
| — | 567-215 | 0–9 XXXall 10 · 5 holders which blocks → | CELLCO PARTNERSHIP DBA VERIZON WIRELESS - OH | 6025 | ASHLAND | OH |
| — | 567-244 | not yet reported which blocks → | BANDWIDTH.COM CLEC, LLC - OH | 001F | NORWALK | OH |
| — | 567-247 | 1XXX2XXX3XXX4XXX5XXX7XXX8XXX9XXX which blocks → | TWC IP ENABLED SERVICES, LLC | 793K | MANSFIELD | OH |
| — | 567-248 | not yet reported which blocks → | BANDWIDTH.COM CLEC, LLC - OH | 001F | ATTICA | OH |
| — | 567-251 | not yet reported which blocks → | BANDWIDTH.COM CLEC, LLC - OH | 001F | FINDLAY | OH |
| — | 567-252 | 2XXX8XXX · 2 holders which blocks → | BANDWIDTH.COM CLEC, LLC - OH | 001F | MARBLEHEAD | OH |
| — | 567-253 | not yet reported which blocks → | BANDWIDTH.COM CLEC, LLC - OH | 001F | KELLEYS IS | OH |
| — | 567-254 | 3XXX8XXX · 2 holders which blocks → | BANDWIDTH.COM CLEC, LLC - OH | 001F | PUT IN BAY | OH |
| — | 567-255 | not yet reported which blocks → | BANDWIDTH.COM CLEC, LLC - OH | 001F | FREMONT | OH |
| — | 567-256 | not yet reported which blocks → | BANDWIDTH.COM CLEC, LLC - OH | 001F | SANDUSKY | OH |
| — | 567-257 | not yet reported which blocks → | BANDWIDTH.COM CLEC, LLC - OH | 001F | UPSANDUSKY | OH |
| — | 567-258 | not yet reported which blocks → | BANDWIDTH.COM CLEC, LLC - OH | 001F | TIFFIN | OH |
| — | 567-261 | not yet reported which blocks → | BANDWIDTH.COM CLEC, LLC - OH | 001F | ASHLAND | OH |
| — | 567-262 | 6XXX8XXX · 2 holders which blocks → | BANDWIDTH.COM CLEC, LLC - OH | 001F | OAK HARBOR | OH |
| — | 567-263 | not yet reported which blocks → | BANDWIDTH.COM CLEC, LLC - OH | 001F | WILLARD | OH |
| — | 567-265 | not yet reported which blocks → | BANDWIDTH.COM CLEC, LLC - OH | 001F | HURON | OH |
| — | 567-266 | not yet reported which blocks → | BANDWIDTH.COM CLEC, LLC - OH | 001F | BELLEVUE | OH |
Source: NANPA CO Code Assignments (Utilized, All States, Public), file date 09/30/2026 — Tier A primary source, refreshed on every import. Viewing is free; bulk downloads require a membership.