NumberResearchRecent thousands-block assignments
0 blocks assigned in the last 30 days · from the daily NANPA thousands-block report, 09/21/2026
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, all time — NPA 351
New assignments by month
Sep 2026
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| Assigned | Thousands-block | Last 4 digits | Status | Assignee | OCN | Rate center | State |
|---|---|---|---|---|---|---|---|
| 2024-06-10 | 351-529-5XXX | 5000–5999 | Assigned | TELNYX LLC | 073H | MERRIMAC | MA |
| 2021-10-25 | 351-354-0XXX | 0000–0999 | Assigned | TELNYX LLC | 073H | LUNENBURG | MA |
| 2021-04-16 | 351-361-0XXX | 0000–0999 | Assigned | TELNYX LLC | 073H | ASHBY | MA |
| 2021-02-02 | 351-204-0XXX | 0000–0999 | Assigned | TELNYX LLC | 073H | LAWRENCE | MA |
| 2021-02-02 | 351-210-8XXX | 8000–8999 | Assigned | TELNYX LLC | 073H | HUDSON | MA |
| 2021-02-02 | 351-356-0XXX | 0000–0999 | Assigned | TELNYX LLC | 073H | LEOMINSTER | MA |
| 2019-12-03 | 351-200-2XXX | 2000–2999 | Assigned | TELNYX LLC | 073H | ASHBY | MA |
| 2019-11-06 | 351-222-0XXX | 0000–0999 | Assigned | TELNYX LLC | 073H | MERRIMAC | MA |
| 2019-11-06 | 351-300-1XXX | 1000–1999 | Assigned | TELNYX LLC | 073H | HARVARD | MA |
| 2019-08-28 | 351-200-1XXX | 1000–1999 | Assigned | TELNYX LLC | 073H | ASHBY | MA |
| 2019-08-27 | 351-247-0XXX | 0000–0999 | Assigned | TELNYX LLC | 073H | LUNENBURG | MA |
| 2017-04-27 | 351-333-8XXX | 8000–8999 | Assigned | TELNYX LLC | 073H | HARVARD | MA |
| 2017-04-27 | 351-777-9XXX | 9000–9999 | Assigned | TELNYX LLC | 073H | HUBBARDSTN | MA |
| 2017-04-18 | 351-444-1XXX | 1000–1999 | Assigned | TELNYX LLC | 073H | IPSWICH | MA |
Source: NANPA Thousands Block Assignment Report (All Regions, Public), file date 09/21/2026 — Tier A primary source, refreshed on every import. Viewing is free; bulk downloads require a membership.