NumberResearchRecent thousands-block assignments
0 blocks assigned in the last 30 days · from the daily NANPA thousands-block report, 09/19/2026
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 715
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| Assigned | Thousands-block | Last 4 digits | Status | Assignee | OCN | Rate center | State |
|---|---|---|---|---|---|---|---|
| 2022-06-16 | 715-469-5XXX | 5000–5999 | Assigned | CTC TELCOM, INC. | 7998 | SARONA | WI |
| 2022-06-16 | 715-624-0XXX | 0000–0999 | Assigned | CTC TELCOM, INC. | 7998 | HAYWARD | WI |
| 2022-06-16 | 715-702-9XXX | 9000–9999 | Assigned | CTC TELCOM, INC. | 7998 | BOYCEVILLE | WI |
| 2022-06-16 | 715-731-8XXX | 8000–8999 | Assigned | CTC TELCOM, INC. | 7998 | SHELL LAKE | WI |
| 2022-06-16 | 715-957-1XXX | 1000–1999 | Assigned | CTC TELCOM, INC. | 7998 | STONE LAKE | WI |
| 2022-06-16 | 715-962-0XXX | 0000–0999 | Assigned | CTC TELCOM, INC. | 7998 | COLFAX | WI |
| 2022-06-16 | 715-979-3XXX | 3000–3999 | Assigned | CTC TELCOM, INC. | 7998 | ASHLAND | WI |
| 2022-06-16 | 715-989-0XXX | 0000–0999 | Assigned | CTC TELCOM, INC. | 7998 | WHEELER | WI |
| 2014-05-06 | 715-458-9XXX | 9000–9999 | Assigned | CTC TELCOM, INC. | 7998 | CAMERON | WI |
| 2011-03-15 | 715-354-5XXX | 5000–5999 | Assigned | CTC TELCOM, INC. | 7998 | BIRCHWOOD | WI |
| 2011-03-15 | 715-822-7XXX | 7000–7999 | Assigned | CTC TELCOM, INC. | 7998 | CUMBERLAND | WI |
| 2009-04-20 | 715-520-8XXX | 8000–8999 | Assigned | CTC TELCOM, INC. | 7998 | SPOONER | WI |
| 2009-04-20 | 715-532-8XXX | 8000–8999 | Assigned | CTC TELCOM, INC. | 7998 | LADYSMITH | WI |
| 2009-04-20 | 715-986-8XXX | 8000–8999 | Assigned | CTC TELCOM, INC. | 7998 | TURTLELAKE | WI |
| 2008-11-10 | 715-236-9XXX | 9000–9999 | Assigned | CTC TELCOM, INC. | 7998 | RICE LAKE | WI |
Source: NANPA Thousands Block Assignment Report (All Regions, Public), file date 09/19/2026 — Tier A primary source, refreshed on every import. Viewing is free; bulk downloads require a membership.