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
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Quick find in this area code:
| Assigned | NPA-NXX | Thousands-blocks taken (last-4 opening) | Code holder | OCN | Rate center | State |
|---|---|---|---|---|---|---|
| — | 563-742 | 0XXX1XXX which blocks → | QWEST CORPORATION | 9631 | DAVENPORT | IA |
| — | 563-744 | 2XXX5XXX6XXX7XXX · 4 holders which blocks → | WINDSTREAM IOWA COMMUNICATIONS, INC. - NORTH | 1167 | FARLEY | IA |
| — | 563-745 | not yet reported which blocks → | ACE TEL. ASSN. - MN | 1345 | SO CANTON | IA |
| — | 563-767 | 5XXX6XXX7XXX8XXX · 3 holders which blocks → | WINDSTREAM IOWA COMMUNICATIONS, INC. - NORTH | 1167 | VOLGA | IA |
| — | 563-770 | 0–9 XXXall 10 · 5 holders which blocks → | CELLCO PARTNERSHIP DBA VERIZON WIRELESS - IA | 6570 | MUSCATINE | IA |
| — | 563-773 | not yet reported which blocks → | LA MOTTE TEL. CO. | 1222 | LAMOTTE | IA |
| — | 563-774 | 4XXX5XXX6XXX7XXX8XXX · 4 holders which blocks → | WINDSTREAM IOWA COMMUNICATIONS, INC. - NORTH | 1167 | WADENA | IA |
| — | 563-776 | 0XXX5XXX8XXX · 3 holders which blocks → | WINDSTREAM IOWA COMMUNICATIONS, INC. | 1178 | WAUCOMA | IA |
| — | 563-777 | 0XXX1XXX2XXX3XXX4XXX5XXX6XXX7XXX9XXX · 3 holders which blocks → | CELLCO PARTNERSHIP DBA VERIZON WIRELESS - IA | 6570 | SABULA | IA |
| — | 563-778 | 0XXX3XXX5XXX6XXX7XXX8XXX · 5 holders which blocks → | WINDSTREAM IOWA COMMUNICATIONS, INC. | 1178 | ST LUCAS | IA |
| — | 563-779 | not yet reported which blocks → | IA | |||
| — | 563-783 | not yet reported which blocks → | NORTHEAST IOWA TEL. CO. | 1230 | ST OLAF | IA |
| — | 563-785 | 2XXX3XXX5XXX7XXX8XXX · 3 holders which blocks → | WINDSTREAM IOWA COMMUNICATIONS, INC. - SYSTEMS | 1170 | DURANT | IA |
| — | 563-811 | not yet reported which blocks → | MULTIPLE OCN LISTING | MULT | XXXXXXXXXX | IA |
| — | 563-815 | not yet reported which blocks → | IA | |||
| — | 563-823 | not yet reported which blocks → | PAETEC ITEL, LLC | 829J | DAVENPORT | IA |
| — | 563-826 | not yet reported which blocks → | LOST NATION-ELWOOD TEL. CO. | 1229 | OXFORD JCT | IA |
| — | 563-843 | not yet reported which blocks → | DIXON ACQUISITION, LLC | 1150 | DIXON | IA |
| — | 563-847 | not yet reported which blocks → | GRAND MOUND COOP. TEL. ASSN. | 1191 | GRANDMOUND | IA |
| — | 563-852 | not yet reported which blocks → | CASCADE COMMUNICATIONS COMPANY | 1118 | CASCADE | IA |
| — | 563-853 | 5XXX6XXX7XXX8XXX9XXX · 4 holders which blocks → | WINDSTREAM IOWA COMMUNICATIONS, INC. - NORTH | 1167 | LUXEMBURG | IA |
| — | 563-855 | 0XXX6XXX7XXX8XXX · 4 holders which blocks → | WINDSTREAM IOWA COMMUNICATIONS, INC. - NORTH | 1167 | WORTHINGTN | IA |
| — | 563-856 | 0XXX6XXX8XXX · 2 holders which blocks → | WINDSTREAM IOWA COMMUNICATIONS, INC. - NORTH | 1167 | COLESBURG | IA |
| — | 563-864 | not yet reported which blocks → | CENTURYTEL OF POSTVILLE, INC. DBA CENTURYLINK | 1274 | POSTVILLE | IA |
| — | 563-870 | 0XXX6XXX7XXX8XXX · 3 holders which blocks → | WINDSTREAM IOWA COMMUNICATIONS, INC. - NORTH | 1167 | HOLY CROSS | IA |
| — | 563-872 | 2XXX6XXX7XXX8XXX · 3 holders which blocks → | WINDSTREAM IOWA COMMUNICATIONS, INC. - SYSTEMS | 1170 | BELLEVUE | IA |
| — | 563-873 | not yet reported which blocks → | ALPINE COMMUNICATIONS, L.C. | 1106 | MCGREGOR | IA |
| — | 563-875 | 0XXX3XXX4XXX · 3 holders which blocks → | WINDSTREAM IOWA COMMUNICATIONS, INC. - NORTH | 1167 | DYERSVILLE | IA |
| — | 563-876 | 0XXX2XXX4XXX6XXX7XXX8XXX · 5 holders which blocks → | WINDSTREAM IOWA COMMUNICATIONS, INC. - NORTH | 1167 | EPWORTH | IA |
| — | 563-879 | not yet reported which blocks → | BERNARD TEL. CO., INC. | 1110 | BERNARD | IA |
| — | 563-880 | none assigned yet which blocks → | UNITED STATES CELLULAR - IA | 6266 | MCGREGOR | IA |
| — | 563-883 | not yet reported which blocks → | HARMONY TEL. CO. | 1404 | SO HARMONY | IA |
| — | 563-884 | not yet reported which blocks → | QWEST CORPORATION | 9631 | DAVENPORT | IA |
| — | 563-886 | 4XXX5XXX7XXX8XXX · 3 holders which blocks → | WINDSTREAM IOWA COMMUNICATIONS, INC. - SYSTEMS | 1170 | TIPTON | IA |
| — | 563-888 | 1XXX5XXX8XXX · 2 holders which blocks → | QWEST CORPORATION | 9631 | DAVENPORT | IA |
| — | 563-889 | not yet reported which blocks → | T-MOBILE USA, INC. | 6529 | TIPTON | IA |
| — | 563-890 | not yet reported which blocks → | F&B COMMUNICATIONS, INC. - IA | 4245 | BENNETT | IA |
| — | 563-893 | 3XXX4XXX5XXX7XXX8XXX · 4 holders which blocks → | WINDSTREAM IOWA COMMUNICATIONS, INC. - SYSTEMS | 1170 | BENNETT | IA |
| — | 563-911 | not yet reported which blocks → | MULTIPLE OCN LISTING | MULT | XXXXXXXXXX | IA |
| — | 563-920 | none assigned yet which blocks → | UNITED STATES CELLULAR - IA | 6266 | MANCHESTER | IA |
| — | 563-921 | 0XXX5XXX6XXX8XXX · 3 holders which blocks → | WINDSTREAM IOWA COMMUNICATIONS, INC. - NORTH | 1167 | NEW VIENNA | IA |
| — | 563-922 | 0XXX4XXX5XXX6XXX7XXX8XXX · 4 holders which blocks → | WINDSTREAM IOWA COMMUNICATIONS, INC. - NORTH | 1167 | DELHI | IA |
| — | 563-923 | 0XXX8XXX · 2 holders which blocks → | WINDSTREAM IOWA COMMUNICATIONS, INC. - NORTH | 1167 | EARLVILLE | IA |
| — | 563-924 | 0XXX4XXX5XXX7XXX8XXX · 4 holders which blocks → | WINDSTREAM IOWA COMMUNICATIONS, INC. - NORTH | 1167 | LAMONT | IA |
| — | 563-925 | 0XXX3XXX4XXX5XXX6XXX7XXX8XXX · 4 holders which blocks → | WINDSTREAM IOWA COMMUNICATIONS, INC. - NORTH | 1167 | GREELEY | IA |
| — | 563-926 | 0XXX3XXX4XXX5XXX6XXX8XXX · 3 holders which blocks → | WINDSTREAM IOWA COMMUNICATIONS, INC. - NORTH | 1167 | HOPKINTON | IA |
| — | 563-927 | 0XXX which blocks → | WINDSTREAM IOWA COMMUNICATIONS, INC. - NORTH | 1167 | MANCHESTER | IA |
| — | 563-928 | 0XXX2XXX3XXX4XXX5XXX · 4 holders which blocks → | WINDSTREAM IOWA COMMUNICATIONS, INC. - NORTH | 1167 | EDGEWOOD | IA |
| — | 563-932 | 0XXX3XXX4XXX5XXX6XXX7XXX8XXX · 4 holders which blocks → | WINDSTREAM IOWA COMMUNICATIONS, INC. - NORTH | 1167 | RYAN | IA |
| — | 563-933 | 0XXX3XXX · 2 holders which blocks → | WINDSTREAM IOWA COMMUNICATIONS, INC. - NORTH | 1167 | STRAWBRYPT | IA |
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.