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 |
|---|---|---|---|---|---|---|---|
| 2016-03-04 | 346-252-0XXX | 0000–0999 | Assigned | IP GLOBAL NETWORKS - TX | 763H | HSTNSUBURB | TX |
| 2016-03-04 | 346-252-1XXX | 1000–1999 | Assigned | IP HORIZON LLC | 515J | HSTNSUBURB | TX |
| 2016-03-04 | 346-260-2XXX | 2000–2999 | Assigned | IP HORIZON LLC | 515J | SATSUMA | TX |
| 2016-03-04 | 346-304-7XXX | 7000–7999 | Assigned | IP HORIZON LLC | 515J | STAFFORD | TX |
| 2016-03-04 | 346-315-2XXX | 2000–2999 | Assigned | IP HORIZON LLC | 515J | DEER PARK | TX |
| 2016-03-04 | 346-321-3XXX | 3000–3999 | Assigned | IP HORIZON LLC | 515J | CHANNELVW | TX |
| 2016-03-04 | 346-347-4XXX | 4000–4999 | Assigned | LEVEL 3 OF TELECOM OF TEXAS, LLC - TX | 7074 | ALVIN | TX |
| 2016-03-04 | 346-368-0XXX | 0000–0999 | Assigned | IP HORIZON LLC | 515J | SUGAR LAND | TX |
| 2016-03-03 | 346-233-0XXX | 0000–0999 | Assigned | ONVOY, LLC - TX | 903C | BAYTOWN | TX |
| 2016-03-03 | 346-233-1XXX | 1000–1999 | Assigned | ONVOY, LLC - TX | 903C | BAYTOWN | TX |
| 2016-03-03 | 346-260-0XXX | 0000–0999 | Assigned | METROPCS, INC. | 5562 | SATSUMA | TX |
| 2016-03-03 | 346-260-1XXX | 1000–1999 | Assigned | METROPCS, INC. | 5562 | SATSUMA | TX |
| 2016-03-03 | 346-304-8XXX | 8000–8999 | Assigned | METROPCS, INC. | 5562 | STAFFORD | TX |
| 2016-03-03 | 346-304-9XXX | 9000–9999 | Assigned | METROPCS, INC. | 5562 | STAFFORD | TX |
| 2016-03-03 | 346-309-1XXX | 1000–1999 | Assigned | METROPCS, INC. | 5562 | SUGAR LAND | TX |
| 2016-03-03 | 346-368-7XXX | 7000–7999 | Assigned | ETS TELEPHONE COMPANY, INC. | 2091 | SUGAR LAND | TX |
| 2016-03-03 | 346-368-8XXX | 8000–8999 | Assigned | ETS TELEPHONE COMPANY, INC. | 2091 | SUGAR LAND | TX |
| 2016-03-03 | 346-801-3XXX | 3000–3999 | Assigned | COMCAST IP PHONE, LLC | 318J | BEACH CITY | TX |
| 2016-03-03 | 346-901-9XXX | 9000–9999 | Assigned | METROPCS, INC. | 5562 | SUGAR LAND | TX |
| 2016-03-02 | 346-216-5XXX | 5000–5999 | Assigned | IP HORIZON LLC | 515J | BAYTOWN | TX |
| 2016-03-02 | 346-220-9XXX | 9000–9999 | Assigned | IP HORIZON LLC | 515J | SPRING | TX |
| 2016-03-02 | 346-226-0XXX | 0000–0999 | Assigned | IP HORIZON LLC | 515J | HOUSTON | TX |
| 2016-03-02 | 346-226-1XXX | 1000–1999 | Assigned | IP HORIZON LLC | 515J | HOUSTON | TX |
| 2016-03-02 | 346-239-6XXX | 6000–6999 | Assigned | IP HORIZON LLC | 515J | RICHMNRNBG | TX |
| 2016-03-02 | 346-239-7XXX | 7000–7999 | Assigned | ONVOY, LLC - TX | 903C | RICHMNRNBG | TX |
| 2016-03-02 | 346-239-8XXX | 8000–8999 | Assigned | ONVOY, LLC - TX | 903C | RICHMNRNBG | TX |
| 2016-03-02 | 346-248-0XXX | 0000–0999 | Assigned | IP HORIZON LLC | 515J | PINEHURST | TX |
| 2016-03-02 | 346-617-1XXX | 1000–1999 | Assigned | IP HORIZON LLC | 515J | DICKINSON | TX |
| 2016-03-02 | 346-808-9XXX | 9000–9999 | Assigned | IP HORIZON LLC | 515J | TOMBALL | TX |
| 2016-03-01 | 346-707-1XXX | 1000–1999 | Assigned | ONVOY, LLC - TX | 903C | VLY LODGE | TX |
| 2016-03-01 | 346-707-2XXX | 2000–2999 | Assigned | ONVOY, LLC - TX | 903C | VLY LODGE | TX |
| 2016-02-26 | 346-223-3XXX | 3000–3999 | Assigned | LEVEL 3 COMMUNICATIONS, LLC - TX | 6114 | HOUSTON | TX |
| 2016-02-26 | 346-223-4XXX | 4000–4999 | Assigned | LEVEL 3 COMMUNICATIONS, LLC - TX | 6114 | HOUSTON | TX |
| 2016-02-26 | 346-223-5XXX | 5000–5999 | Assigned | LEVEL 3 COMMUNICATIONS, LLC - TX | 6114 | HOUSTON | TX |
| 2016-02-26 | 346-223-6XXX | 6000–6999 | Assigned | LEVEL 3 COMMUNICATIONS, LLC - TX | 6114 | HOUSTON | TX |
| 2016-02-26 | 346-223-7XXX | 7000–7999 | Assigned | LEVEL 3 COMMUNICATIONS, LLC - TX | 6114 | HOUSTON | TX |
| 2016-02-26 | 346-223-8XXX | 8000–8999 | Assigned | LEVEL 3 COMMUNICATIONS, LLC - TX | 6114 | HOUSTON | TX |
| 2016-02-26 | 346-316-1XXX | 1000–1999 | Assigned | COMCAST IP PHONE, LLC | 318J | BAMMEL | TX |
| 2016-02-26 | 346-347-7XXX | 7000–7999 | Assigned | ONVOY, LLC - TX | 903C | ALVIN | TX |
| 2016-02-26 | 346-347-8XXX | 8000–8999 | Assigned | ONVOY, LLC - TX | 903C | ALVIN | TX |
| 2016-02-26 | 346-814-2XXX | 2000–2999 | Assigned | AERIAL COMMUNICATIONS, INC. | 6701 | SPRING | TX |
| 2016-02-26 | 346-814-3XXX | 3000–3999 | Assigned | AERIAL COMMUNICATIONS, INC. | 6701 | SPRING | TX |
| 2016-02-26 | 346-814-4XXX | 4000–4999 | Assigned | AERIAL COMMUNICATIONS, INC. | 6701 | SPRING | TX |
| 2016-02-26 | 346-814-5XXX | 5000–5999 | Assigned | AERIAL COMMUNICATIONS, INC. | 6701 | SPRING | TX |
| 2016-02-24 | 346-301-1XXX | 1000–1999 | Assigned | ONVOY, LLC - TX | 903C | SPLENDORA | TX |
| 2016-02-24 | 346-301-2XXX | 2000–2999 | Assigned | ONVOY, LLC - TX | 903C | SPLENDORA | TX |
| 2016-02-24 | 346-387-7XXX | 7000–7999 | Assigned | ETS TELEPHONE COMPANY, INC. | 2091 | KATY | TX |
| 2016-02-24 | 346-387-8XXX | 8000–8999 | Assigned | ETS TELEPHONE COMPANY, INC. | 2091 | KATY | TX |
| 2016-02-24 | 346-801-1XXX | 1000–1999 | Assigned | METROPCS, INC. | 5562 | BEACH CITY | TX |
| 2016-02-24 | 346-801-2XXX | 2000–2999 | Assigned | METROPCS, INC. | 5562 | BEACH CITY | 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.