NumberResearchRecent thousands-block assignments
25 blocks assigned in the last 30 days · from the daily NANPA thousands-block report, 09/20/2026
Most carrier growth happens here, not at the prefix level: under number pooling, carriers receive individual 1,000-number blocks (e.g. 626-470-0XXX) within already-assigned prefixes. Assignments are initial assignments — the current serving carrier of individual numbers may differ due to portability.
Most active assignees, last 30 days — NPA 475
New assignments by month
Sep 2026
Aug 2026
Jul 2026
Jun 2026
May 2026
Apr 2026
Mar 2026
Feb 2026
Jan 2026
Dec 2025
Nov 2025
Oct 2025
| Assigned | Thousands-block | Last 4 digits | Status | Assignee | OCN | Rate center | State |
|---|---|---|---|---|---|---|---|
| 2022-08-23 | 475-296-5XXX | 5000–5999 | Assigned | CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CT | 6388 | DANBURY | CT |
| 2022-08-18 | 475-946-8XXX | 8000–8999 | Assigned | PEERLESS NETWORK OF CONNECTICUT, LLC - CT | 539F | OLDGRNWICH | CT |
| 2022-08-15 | 475-314-9XXX | 9000–9999 | Assigned | HD CARRIER LLC | 321J | HUNTINGTON | CT |
| 2022-07-28 | 475-301-5XXX | 5000–5999 | Assigned | CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CT | 6388 | NEW HAVEN | CT |
| 2022-07-28 | 475-301-6XXX | 6000–6999 | Assigned | CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CT | 6388 | NEW HAVEN | CT |
| 2022-07-28 | 475-301-7XXX | 7000–7999 | Assigned | CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CT | 6388 | NEW HAVEN | CT |
| 2022-07-21 | 475-480-0XXX | 0000–0999 | Assigned | BANDWIDTH.COM CLEC, LLC - CT | 199F | NEW HAVEN | CT |
| 2022-07-21 | 475-480-2XXX | 2000–2999 | Assigned | BANDWIDTH.COM CLEC, LLC - CT | 199F | NEW HAVEN | CT |
| 2022-07-21 | 475-480-3XXX | 3000–3999 | Assigned | BANDWIDTH.COM CLEC, LLC - CT | 199F | NEW HAVEN | CT |
| 2022-07-21 | 475-480-4XXX | 4000–4999 | Assigned | BANDWIDTH.COM CLEC, LLC - CT | 199F | NEW HAVEN | CT |
| 2022-07-21 | 475-480-5XXX | 5000–5999 | Assigned | BANDWIDTH.COM CLEC, LLC - CT | 199F | NEW HAVEN | CT |
| 2022-07-21 | 475-480-6XXX | 6000–6999 | Assigned | BANDWIDTH.COM CLEC, LLC - CT | 199F | NEW HAVEN | CT |
| 2022-07-21 | 475-480-7XXX | 7000–7999 | Assigned | BANDWIDTH.COM CLEC, LLC - CT | 199F | NEW HAVEN | CT |
| 2022-07-11 | 475-336-9XXX | 9000–9999 | Assigned | IP HORIZON LLC | 515J | DARIEN | CT |
| 2022-07-11 | 475-426-0XXX | 0000–0999 | Assigned | IP HORIZON LLC | 515J | RIDGEFIELD | CT |
| 2022-07-11 | 475-550-0XXX | 0000–0999 | Assigned | IP HORIZON LLC | 515J | STAMFORD | CT |
| 2022-07-07 | 475-466-0XXX | 0000–0999 | Assigned | IP HORIZON LLC | 515J | MADISON | CT |
| 2022-07-07 | 475-622-0XXX | 0000–0999 | Assigned | IP HORIZON LLC | 515J | WOLCOTT | CT |
| 2022-07-07 | 475-832-0XXX | 0000–0999 | Assigned | IP HORIZON LLC | 515J | WILTON | CT |
| 2022-07-07 | 475-946-1XXX | 1000–1999 | Assigned | IP HORIZON LLC | 515J | OLDGRNWICH | CT |
| 2022-07-05 | 475-274-1XXX | 1000–1999 | Assigned | IP HORIZON LLC | 515J | GUILFORD | CT |
| 2022-07-05 | 475-297-4XXX | 4000–4999 | Assigned | IP HORIZON LLC | 515J | NEWTOWN | CT |
| 2022-07-05 | 475-463-0XXX | 0000–0999 | Assigned | IP HORIZON LLC | 515J | SEYMOUR | CT |
| 2022-06-29 | 475-315-7XXX | 7000–7999 | Assigned | IP HORIZON LLC | 515J | CHESHIRE | CT |
| 2022-06-29 | 475-410-1XXX | 1000–1999 | Assigned | IP HORIZON LLC | 515J | WOODBURY | CT |
| 2022-06-29 | 475-763-0XXX | 0000–0999 | Assigned | IP HORIZON LLC | 515J | NAUGATUCK | CT |
| 2022-06-29 | 475-887-0XXX | 0000–0999 | Assigned | IP HORIZON LLC | 515J | WESTPORT | CT |
| 2022-06-28 | 475-304-9XXX | 9000–9999 | Assigned | IP HORIZON LLC | 515J | HUNTINGTON | CT |
| 2022-06-28 | 475-320-0XXX | 0000–0999 | Assigned | IP HORIZON LLC | 515J | ANSONIDRBY | CT |
| 2022-06-28 | 475-356-5XXX | 5000–5999 | Assigned | VONAGE AMERICA LLC | 197D | BRIDGEPORT | CT |
| 2022-06-28 | 475-888-4XXX | 4000–4999 | Assigned | VONAGE AMERICA LLC | 197D | FAIRFIELD | CT |
| 2022-06-23 | 475-286-9XXX | 9000–9999 | Assigned | IP HORIZON LLC | 515J | BRANFORD | CT |
| 2022-06-23 | 475-307-2XXX | 2000–2999 | Assigned | IP HORIZON LLC | 515J | MERIDEN | CT |
| 2022-06-23 | 475-310-2XXX | 2000–2999 | Assigned | IP HORIZON LLC | 515J | WALLINGFD | CT |
| 2022-06-23 | 475-467-1XXX | 1000–1999 | Assigned | IP HORIZON LLC | 515J | TRUMBULL | CT |
| 2022-06-14 | 475-290-4XXX | 4000–4999 | Assigned | IP HORIZON LLC | 515J | DANBURY | CT |
| 2022-06-14 | 475-316-4XXX | 4000–4999 | Assigned | IP HORIZON LLC | 515J | WATERBURY | CT |
| 2022-06-14 | 475-332-8XXX | 8000–8999 | Assigned | TELEPORT COMMUNICATIONS AMERICA, LLC - CT | 7143 | BRIDGEPORT | CT |
| 2022-06-14 | 475-332-9XXX | 9000–9999 | Assigned | IP HORIZON LLC | 515J | BRIDGEPORT | CT |
| 2022-06-14 | 475-467-9XXX | 9000–9999 | Assigned | NEW CINGULAR WIRELESS PCS, LLC - DC | 4036 | TRUMBULL | CT |
| 2022-06-14 | 475-544-1XXX | 1000–1999 | Assigned | IP HORIZON LLC | 515J | NORWALK | CT |
| 2022-06-13 | 475-426-5XXX | 5000–5999 | Assigned | COMCAST IP PHONE, LLC | 318J | RIDGEFIELD | CT |
| 2022-06-13 | 475-426-8XXX | 8000–8999 | Assigned | COMCAST IP PHONE, LLC | 318J | RIDGEFIELD | CT |
| 2022-06-06 | 475-301-2XXX | 2000–2999 | Assigned | CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CT | 6388 | NEW HAVEN | CT |
| 2022-06-06 | 475-301-3XXX | 3000–3999 | Assigned | CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CT | 6388 | NEW HAVEN | CT |
| 2022-06-06 | 475-301-4XXX | 4000–4999 | Assigned | CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CT | 6388 | NEW HAVEN | CT |
| 2022-05-20 | 475-316-0XXX | 0000–0999 | Assigned | NEW CINGULAR WIRELESS PCS, LLC - DC | 4036 | WATERBURY | CT |
| 2022-05-17 | 475-332-5XXX | 5000–5999 | Assigned | OMNIPOINT COMMUNICATIONS, INC. - CT | 6624 | BRIDGEPORT | CT |
| 2022-05-17 | 475-332-6XXX | 6000–6999 | Assigned | OMNIPOINT COMMUNICATIONS, INC. - CT | 6624 | BRIDGEPORT | CT |
| 2022-05-17 | 475-332-7XXX | 7000–7999 | Assigned | OMNIPOINT COMMUNICATIONS, INC. - CT | 6624 | BRIDGEPORT | CT |
Source: NANPA Thousands Block Assignment Report (All Regions, Public), file date 09/20/2026 — Tier A primary source, refreshed on every import. Viewing is free; bulk downloads require a membership.