NumberResearchRecent thousands-block assignments
36 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 346
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 |
|---|---|---|---|---|---|---|---|
| 2017-06-01 | 346-310-5XXX | 5000–5999 | Assigned | MCIMETRO ACCESS TRANSMISSION SERVICES LLC - TX | 7239 | HOUSTON | TX |
| 2017-06-01 | 346-310-7XXX | 7000–7999 | Assigned | MCIMETRO ACCESS TRANSMISSION SERVICES LLC - TX | 7239 | HOUSTON | TX |
| 2017-06-01 | 346-787-8XXX | 8000–8999 | Assigned | TELNYX LLC | 073H | LA PORTE | TX |
| 2017-05-31 | 346-310-8XXX | 8000–8999 | Assigned | MCIMETRO ACCESS TRANSMISSION SERVICES LLC - TX | 7239 | HOUSTON | TX |
| 2017-05-31 | 346-320-6XXX | 6000–6999 | Assigned | CELLCO PARTNERSHIP DBA VERIZON WIRELESS - TX | 6506 | HOUSTON | TX |
| 2017-05-31 | 346-320-7XXX | 7000–7999 | Assigned | CELLCO PARTNERSHIP DBA VERIZON WIRELESS - TX | 6506 | HOUSTON | TX |
| 2017-05-31 | 346-330-8XXX | 8000–8999 | Assigned | CELLCO PARTNERSHIP DBA VERIZON WIRELESS - TX | 6506 | HOUSTON | TX |
| 2017-05-25 | 346-245-6XXX | 6000–6999 | Assigned | TELNYX LLC | 073H | STAFFORD | TX |
| 2017-05-25 | 346-246-1XXX | 1000–1999 | Assigned | TELNYX LLC | 073H | TOMBALL | TX |
| 2017-05-25 | 346-254-1XXX | 1000–1999 | Assigned | TELNYX LLC | 073H | CYPRESS | TX |
| 2017-05-25 | 346-255-4XXX | 4000–4999 | Assigned | TELNYX LLC | 073H | CHANNELVW | TX |
| 2017-05-25 | 346-261-9XXX | 9000–9999 | Assigned | NEW CINGULAR WIRELESS PCS, LLC - IL | 6534 | PORTER | TX |
| 2017-05-25 | 346-347-1XXX | 1000–1999 | Assigned | TELNYX LLC | 073H | ALVIN | TX |
| 2017-05-25 | 346-414-3XXX | 3000–3999 | Assigned | TELNYX LLC | 073H | CLEVELAND | TX |
| 2017-05-25 | 346-954-2XXX | 2000–2999 | Assigned | TELNYX LLC | 073H | DEER PARK | TX |
| 2017-05-23 | 346-773-4XXX | 4000–4999 | Assigned | COMCAST IP PHONE, LLC | 318J | HSTNSUBURB | TX |
| 2017-05-22 | 346-323-0XXX | 0000–0999 | Assigned | NEW CINGULAR WIRELESS PCS, LLC - IL | 6534 | HUMBLE | TX |
| 2017-05-22 | 346-323-1XXX | 1000–1999 | Assigned | NEW CINGULAR WIRELESS PCS, LLC - IL | 6534 | HUMBLE | TX |
| 2017-05-22 | 346-420-3XXX | 3000–3999 | Assigned | NEW CINGULAR WIRELESS PCS, LLC - IL | 6534 | SUGAR LAND | TX |
| 2017-05-22 | 346-420-4XXX | 4000–4999 | Assigned | NEW CINGULAR WIRELESS PCS, LLC - IL | 6534 | SUGAR LAND | TX |
| 2017-05-22 | 346-617-2XXX | 2000–2999 | Assigned | ONVOY, LLC - TX | 903C | DICKINSON | TX |
| 2017-05-18 | 346-907-3XXX | 3000–3999 | Assigned | MCIMETRO ACCESS TRANSMISSION SERVICES LLC - TX | 7239 | HSTNSUBURB | TX |
| 2017-05-16 | 346-309-4XXX | 4000–4999 | Assigned | COMCAST IP PHONE, LLC | 318J | SUGAR LAND | TX |
| 2017-05-15 | 346-257-2XXX | 2000–2999 | Assigned | LEVEL 3 COMMUNICATIONS, LLC - TX | 6114 | KATY | TX |
| 2017-05-11 | 346-244-4XXX | 4000–4999 | Assigned | BANDWIDTH.COM CLEC, LLC - TX | 004F | SATSUMA | TX |
| 2017-05-11 | 346-246-0XXX | 0000–0999 | Assigned | BANDWIDTH.COM CLEC, LLC - TX | 004F | TOMBALL | TX |
| 2017-05-09 | 346-237-2XXX | 2000–2999 | Assigned | TELEPORT COMMUNICATIONS AMERICA, LLC - TX | 7138 | HOUSTON | TX |
| 2017-05-09 | 346-237-3XXX | 3000–3999 | Assigned | TELEPORT COMMUNICATIONS AMERICA, LLC - TX | 7138 | HOUSTON | TX |
| 2017-05-09 | 346-262-1XXX | 1000–1999 | Assigned | BANDWIDTH.COM CLEC, LLC - TX | 004F | HOUSTON | TX |
| 2017-05-09 | 346-413-4XXX | 4000–4999 | Assigned | CELLCO PARTNERSHIP DBA VERIZON WIRELESS - TX | 6506 | SPRING | TX |
| 2017-05-09 | 346-413-5XXX | 5000–5999 | Assigned | BANDWIDTH.COM CLEC, LLC - TX | 004F | SPRING | TX |
| 2017-05-09 | 346-867-8XXX | 8000–8999 | Assigned | BANDWIDTH.COM CLEC, LLC - TX | 004F | HOUSTON | TX |
| 2017-05-09 | 346-867-9XXX | 9000–9999 | Assigned | BANDWIDTH.COM CLEC, LLC - TX | 004F | HOUSTON | TX |
| 2017-05-09 | 346-908-1XXX | 1000–1999 | Assigned | BANDWIDTH.COM CLEC, LLC - TX | 004F | SMITHERSLK | TX |
| 2017-05-03 | 346-250-0XXX | 0000–0999 | Assigned | VONAGE AMERICA LLC | 197D | HOUSTON | TX |
| 2017-05-02 | 346-245-5XXX | 5000–5999 | Assigned | ONVOY, LLC - TX | 903C | STAFFORD | TX |
| 2017-05-02 | 346-249-0XXX | 0000–0999 | Assigned | BANDWIDTH.COM CLEC, LLC - TX | 004F | BAMMEL | TX |
| 2017-05-02 | 346-249-2XXX | 2000–2999 | Assigned | BANDWIDTH.COM CLEC, LLC - TX | 004F | BAMMEL | TX |
| 2017-05-02 | 346-249-3XXX | 3000–3999 | Assigned | BANDWIDTH.COM CLEC, LLC - TX | 004F | BAMMEL | TX |
| 2017-05-02 | 346-249-4XXX | 4000–4999 | Assigned | BANDWIDTH.COM CLEC, LLC - TX | 004F | BAMMEL | TX |
| 2017-05-02 | 346-816-0XXX | 0000–0999 | Assigned | BANDWIDTH.COM CLEC, LLC - TX | 004F | ARCOLA | TX |
| 2017-05-02 | 346-816-1XXX | 1000–1999 | Assigned | ONVOY, LLC - TX | 903C | ARCOLA | TX |
| 2017-05-02 | 346-954-0XXX | 0000–0999 | Assigned | BANDWIDTH.COM CLEC, LLC - TX | 004F | DEER PARK | TX |
| 2017-05-02 | 346-954-1XXX | 1000–1999 | Assigned | BANDWIDTH.COM CLEC, LLC - TX | 004F | DEER PARK | TX |
| 2017-04-28 | 346-330-9XXX | 9000–9999 | Assigned | COMCAST IP PHONE, LLC | 318J | HOUSTON | TX |
| 2017-04-20 | 346-867-1XXX | 1000–1999 | Assigned | COMCAST IP PHONE, LLC | 318J | HOUSTON | TX |
| 2017-04-20 | 346-867-6XXX | 6000–6999 | Assigned | COMCAST IP PHONE, LLC | 318J | HOUSTON | TX |
| 2017-04-17 | 346-570-5XXX | 5000–5999 | Assigned | COMCAST IP PHONE, LLC | 318J | HSTNSUBURB | TX |
| 2017-04-14 | 346-254-6XXX | 6000–6999 | Assigned | TELEPORT COMMUNICATIONS AMERICA, LLC - TX | 7138 | CYPRESS | TX |
| 2017-04-11 | 346-286-0XXX | 0000–0999 | Assigned | SOUTHWESTERN BELL | 9533 | HOUSTON | TX |
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.