NumberResearchRecent thousands-block assignments
5 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 203
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 |
|---|---|---|---|---|---|---|---|
| 2016-01-11 | 203-390-7XXX | 7000–7999 | Assigned | NEW CINGULAR WIRELESS PCS, LLC - DC | 4036 | NEW HAVEN | CT |
| 2016-01-11 | 203-390-9XXX | 9000–9999 | Assigned | NEW CINGULAR WIRELESS PCS, LLC - DC | 4036 | NEW HAVEN | CT |
| 2016-01-07 | 203-390-0XXX | 0000–0999 | Assigned | OMNIPOINT COMMUNICATIONS, INC. - CT | 6624 | NEW HAVEN | CT |
| 2016-01-07 | 203-390-1XXX | 1000–1999 | Assigned | OMNIPOINT COMMUNICATIONS, INC. - CT | 6624 | NEW HAVEN | CT |
| 2016-01-07 | 203-390-8XXX | 8000–8999 | Assigned | OMNIPOINT COMMUNICATIONS, INC. - CT | 6624 | NEW HAVEN | CT |
| 2016-01-07 | 203-571-2XXX | 2000–2999 | Assigned | NEW CINGULAR WIRELESS PCS, LLC - DC | 4036 | WESTPORT | CT |
| 2016-01-07 | 203-571-9XXX | 9000–9999 | Assigned | NEW CINGULAR WIRELESS PCS, LLC - DC | 4036 | WESTPORT | CT |
| 2015-12-30 | 203-390-5XXX | 5000–5999 | Assigned | COMCAST IP PHONE, LLC | 318J | NEW HAVEN | CT |
| 2015-12-18 | 203-601-6XXX | 6000–6999 | Assigned | ONVOY, LLC - CT | 639C | TRUMBULL | CT |
| 2015-11-24 | 203-443-6XXX | 6000–6999 | Assigned | OMNIPOINT COMMUNICATIONS, INC. - CT | 6624 | MERIDEN | CT |
| 2015-11-11 | 203-390-2XXX | 2000–2999 | Assigned | TELEPORT COMMUNICATIONS AMERICA, LLC - CT | 7143 | NEW HAVEN | CT |
| 2015-11-11 | 203-390-3XXX | 3000–3999 | Assigned | TELEPORT COMMUNICATIONS AMERICA, LLC - CT | 7143 | NEW HAVEN | CT |
| 2015-11-11 | 203-390-4XXX | 4000–4999 | Assigned | TELEPORT COMMUNICATIONS AMERICA, LLC - CT | 7143 | NEW HAVEN | CT |
| 2015-10-16 | 203-349-1XXX | 1000–1999 | Assigned | NEW CINGULAR WIRELESS PCS, LLC - DC | 4036 | WESTPORT | CT |
| 2015-10-08 | 203-769-3XXX | 3000–3999 | Assigned | PAETEC ITEL, LLC | 829J | GREENWICH | CT |
| 2015-09-04 | 203-833-9XXX | 9000–9999 | Assigned | OMNIPOINT COMMUNICATIONS, INC. - CT | 6624 | NEW HAVEN | CT |
| 2015-09-03 | 203-586-0XXX | 0000–0999 | Assigned | BANDWIDTH.COM CLEC, LLC - CT | 199F | WOODBURY | CT |
| 2015-08-31 | 203-833-5XXX | 5000–5999 | Assigned | TELEPORT COMMUNICATIONS AMERICA, LLC - CT | 7143 | NEW HAVEN | CT |
| 2015-08-31 | 203-833-6XXX | 6000–6999 | Assigned | TELEPORT COMMUNICATIONS AMERICA, LLC - CT | 7143 | NEW HAVEN | CT |
| 2015-08-31 | 203-833-7XXX | 7000–7999 | Assigned | TELEPORT COMMUNICATIONS AMERICA, LLC - CT | 7143 | NEW HAVEN | CT |
| 2015-08-31 | 203-833-8XXX | 8000–8999 | Assigned | TELEPORT COMMUNICATIONS AMERICA, LLC - CT | 7143 | NEW HAVEN | CT |
| 2015-08-06 | 203-833-2XXX | 2000–2999 | Assigned | CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CT | 6388 | NEW HAVEN | CT |
| 2015-08-06 | 203-833-3XXX | 3000–3999 | Assigned | CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CT | 6388 | NEW HAVEN | CT |
| 2015-08-06 | 203-833-4XXX | 4000–4999 | Assigned | CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CT | 6388 | NEW HAVEN | CT |
| 2015-08-04 | 203-682-5XXX | 5000–5999 | Assigned | NEW CINGULAR WIRELESS PCS, LLC - DC | 4036 | WESTPORT | CT |
| 2015-07-30 | 203-833-0XXX | 0000–0999 | Assigned | CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CT | 6388 | NEW HAVEN | CT |
| 2015-07-30 | 203-833-1XXX | 1000–1999 | Assigned | CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CT | 6388 | NEW HAVEN | CT |
| 2015-07-24 | 203-742-0XXX | 0000–0999 | Assigned | BANDWIDTH.COM CLEC, LLC - CT | 199F | GREENWICH | CT |
| 2015-06-26 | 203-557-6XXX | 6000–6999 | Assigned | CSC VOICE, LLC | 612K | WESTPORT | CT |
| 2015-06-22 | 203-741-9XXX | 9000–9999 | Assigned | COMCAST IP PHONE, LLC | 318J | WALLINGFD | CT |
| 2015-06-17 | 203-900-9XXX | 9000–9999 | Assigned | PEERLESS NETWORK OF CONNECTICUT, LLC - CT | 539F | GREENWICH | CT |
| 2015-05-28 | 203-741-8XXX | 8000–8999 | Assigned | BANDWIDTH.COM CLEC, LLC - CT | 199F | WALLINGFD | CT |
| 2015-04-29 | 203-664-5XXX | 5000–5999 | Assigned | ONVOY, LLC - CT | 639C | REDDING | CT |
| 2015-04-27 | 203-266-1XXX | 1000–1999 | Assigned | ONVOY, LLC - CT | 639C | WOODBURY | CT |
| 2015-04-27 | 203-408-3XXX | 3000–3999 | Assigned | BANDWIDTH.COM CLEC, LLC - CT | 199F | REDDING | CT |
| 2015-04-24 | 203-409-2XXX | 2000–2999 | Assigned | BANDWIDTH.COM CLEC, LLC - CT | 199F | OLDGRNWICH | CT |
| 2015-04-24 | 203-580-4XXX | 4000–4999 | Assigned | BANDWIDTH.COM CLEC, LLC - CT | 199F | BYRAM | CT |
| 2015-04-24 | 203-580-6XXX | 6000–6999 | Assigned | ONVOY, LLC - CT | 639C | BYRAM | CT |
| 2015-04-24 | 203-601-7XXX | 7000–7999 | Assigned | ONVOY, LLC - CT | 639C | TRUMBULL | CT |
| 2015-04-24 | 203-625-1XXX | 1000–1999 | Assigned | ONVOY, LLC - CT | 639C | GREENWICH | CT |
| 2015-04-24 | 203-884-0XXX | 0000–0999 | Assigned | ONVOY, LLC - CT | 639C | GUILFORD | CT |
| 2015-04-23 | 203-349-6XXX | 6000–6999 | Assigned | ONVOY, LLC - CT | 639C | WESTPORT | CT |
| 2015-04-23 | 203-697-8XXX | 8000–8999 | Assigned | ONVOY, LLC - CT | 639C | WALLINGFD | CT |
| 2015-04-23 | 203-872-5XXX | 5000–5999 | Assigned | ONVOY, LLC - CT | 639C | CHESHIRE | CT |
| 2015-04-16 | 203-447-0XXX | 0000–0999 | Assigned | BANDWIDTH.COM CLEC, LLC - CT | 199F | HUNTINGTON | CT |
| 2015-04-16 | 203-538-7XXX | 7000–7999 | Assigned | BANDWIDTH.COM CLEC, LLC - CT | 199F | HUNTINGTON | CT |
| 2015-04-13 | 203-263-1XXX | 1000–1999 | Assigned | BANDWIDTH.COM CLEC, LLC - CT | 199F | WOODBURY | CT |
| 2015-04-13 | 203-263-9XXX | 9000–9999 | Assigned | BANDWIDTH.COM CLEC, LLC - CT | 199F | WOODBURY | CT |
| 2015-04-13 | 203-293-0XXX | 0000–0999 | Assigned | BANDWIDTH.COM CLEC, LLC - CT | 199F | WESTPORT | CT |
| 2015-04-13 | 203-293-2XXX | 2000–2999 | Assigned | BANDWIDTH.COM CLEC, LLC - CT | 199F | WESTPORT | 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.